./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 448d4d75 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 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-448d4d7-m [2024-02-20 12:11:06,930 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-20 12:11:07,008 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-20 12:11:07,012 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-20 12:11:07,012 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-20 12:11:07,036 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-20 12:11:07,037 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-20 12:11:07,037 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-20 12:11:07,038 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-20 12:11:07,038 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-20 12:11:07,039 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-20 12:11:07,039 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-20 12:11:07,039 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-20 12:11:07,040 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-20 12:11:07,040 INFO L153 SettingsManager]: * Use SBE=true [2024-02-20 12:11:07,041 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-20 12:11:07,041 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-20 12:11:07,041 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-20 12:11:07,042 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-20 12:11:07,042 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-20 12:11:07,042 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-20 12:11:07,047 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-20 12:11:07,048 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-20 12:11:07,048 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-20 12:11:07,048 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-20 12:11:07,048 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-20 12:11:07,049 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-20 12:11:07,049 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-20 12:11:07,049 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-20 12:11:07,050 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-20 12:11:07,051 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-20 12:11:07,052 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-20 12:11:07,052 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 12:11:07,052 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-20 12:11:07,053 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-20 12:11:07,053 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-20 12:11:07,053 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-20 12:11:07,053 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-20 12:11:07,054 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-20 12:11:07,054 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-20 12:11:07,054 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-20 12:11:07,054 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-20 12:11:07,054 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-20 12:11:07,055 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-20 12:11:07,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-20 12:11:07,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-20 12:11:07,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-20 12:11:07,378 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-20 12:11:07,378 INFO L274 PluginConnector]: CDTParser initialized [2024-02-20 12:11:07,380 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2024-02-20 12:11:08,617 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-20 12:11:08,813 INFO L384 CDTParser]: Found 1 translation units. [2024-02-20 12:11:08,814 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2024-02-20 12:11:08,821 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/098770787/5b1387bb61e243c8af06958e1661d0b1/FLAG3d1a234cf [2024-02-20 12:11:08,832 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/098770787/5b1387bb61e243c8af06958e1661d0b1 [2024-02-20 12:11:08,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-20 12:11:08,835 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-20 12:11:08,844 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-20 12:11:08,845 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-20 12:11:08,850 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-20 12:11:08,851 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 12:11:08" (1/1) ... [2024-02-20 12:11:08,852 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b86ef01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:08, skipping insertion in model container [2024-02-20 12:11:08,853 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 12:11:08" (1/1) ... [2024-02-20 12:11:08,874 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-20 12:11:09,056 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[1991,2004] [2024-02-20 12:11:09,097 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 12:11:09,118 INFO L202 MainTranslator]: Completed pre-run [2024-02-20 12:11:09,145 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[1991,2004] [2024-02-20 12:11:09,146 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 12:11:09,161 INFO L206 MainTranslator]: Completed translation [2024-02-20 12:11:09,162 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:09 WrapperNode [2024-02-20 12:11:09,163 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-20 12:11:09,164 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-20 12:11:09,164 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-20 12:11:09,164 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-20 12:11:09,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:09" (1/1) ... [2024-02-20 12:11:09,176 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:09" (1/1) ... [2024-02-20 12:11:09,196 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 69 [2024-02-20 12:11:09,197 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-20 12:11:09,198 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-20 12:11:09,198 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-20 12:11:09,198 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-20 12:11:09,213 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:09" (1/1) ... [2024-02-20 12:11:09,213 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:09" (1/1) ... [2024-02-20 12:11:09,215 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:09" (1/1) ... [2024-02-20 12:11:09,229 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]. [2024-02-20 12:11:09,229 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:09" (1/1) ... [2024-02-20 12:11:09,229 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:09" (1/1) ... [2024-02-20 12:11:09,235 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:09" (1/1) ... [2024-02-20 12:11:09,238 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:09" (1/1) ... [2024-02-20 12:11:09,240 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:09" (1/1) ... [2024-02-20 12:11:09,241 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:09" (1/1) ... [2024-02-20 12:11:09,243 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-20 12:11:09,244 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-20 12:11:09,244 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-20 12:11:09,244 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-20 12:11:09,245 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:09" (1/1) ... [2024-02-20 12:11:09,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 12:11:09,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:09,286 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) [2024-02-20 12:11:09,312 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 [2024-02-20 12:11:09,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-20 12:11:09,352 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-20 12:11:09,352 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-20 12:11:09,353 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-20 12:11:09,353 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-20 12:11:09,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-20 12:11:09,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-20 12:11:09,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-20 12:11:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-20 12:11:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-20 12:11:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-20 12:11:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-20 12:11:09,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-20 12:11:09,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-20 12:11:09,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-20 12:11:09,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-20 12:11:09,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-20 12:11:09,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-20 12:11:09,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-20 12:11:09,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-20 12:11:09,359 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-20 12:11:09,472 INFO L244 CfgBuilder]: Building ICFG [2024-02-20 12:11:09,475 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-20 12:11:09,680 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-20 12:11:09,680 INFO L293 CfgBuilder]: Performing block encoding [2024-02-20 12:11:09,794 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-20 12:11:09,794 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-20 12:11:09,795 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 12:11:09 BoogieIcfgContainer [2024-02-20 12:11:09,795 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-20 12:11:09,797 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-20 12:11:09,797 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-20 12:11:09,800 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-20 12:11:09,800 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 12:11:08" (1/3) ... [2024-02-20 12:11:09,801 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4944f480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 12:11:09, skipping insertion in model container [2024-02-20 12:11:09,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:11:09" (2/3) ... [2024-02-20 12:11:09,802 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4944f480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 12:11:09, skipping insertion in model container [2024-02-20 12:11:09,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 12:11:09" (3/3) ... [2024-02-20 12:11:09,804 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2024-02-20 12:11:09,824 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-20 12:11:09,825 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-20 12:11:09,825 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-20 12:11:09,877 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-20 12:11:09,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 60 flow [2024-02-20 12:11:09,928 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2024-02-20 12:11:09,929 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 12:11:09,931 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. [2024-02-20 12:11:09,932 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 23 transitions, 60 flow [2024-02-20 12:11:09,935 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 20 transitions, 52 flow [2024-02-20 12:11:09,945 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 12:11:09,953 INFO L369 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=All, 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;@1f2d23c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 12:11:09,953 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-20 12:11:09,962 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 12:11:09,963 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-02-20 12:11:09,963 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 12:11:09,963 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:09,964 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:09,965 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:09,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:09,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1311663743, now seen corresponding path program 1 times [2024-02-20 12:11:09,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:09,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22167132] [2024-02-20 12:11:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:09,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:10,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:10,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22167132] [2024-02-20 12:11:10,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22167132] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:11:10,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:11:10,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-20 12:11:10,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890315435] [2024-02-20 12:11:10,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:11:10,289 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 12:11:10,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:10,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 12:11:10,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 12:11:10,324 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 23 [2024-02-20 12:11:10,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2024-02-20 12:11:10,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:10,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 23 [2024-02-20 12:11:10,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:10,416 INFO L124 PetriNetUnfolderBase]: 73/151 cut-off events. [2024-02-20 12:11:10,416 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-02-20 12:11:10,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 151 events. 73/151 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 514 event pairs, 21 based on Foata normal form. 5/153 useless extension candidates. Maximal degree in co-relation 233. Up to 105 conditions per place. [2024-02-20 12:11:10,420 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 18 selfloop transitions, 2 changer transitions 4/29 dead transitions. [2024-02-20 12:11:10,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 29 transitions, 127 flow [2024-02-20 12:11:10,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 12:11:10,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 12:11:10,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2024-02-20 12:11:10,433 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6811594202898551 [2024-02-20 12:11:10,437 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2024-02-20 12:11:10,437 INFO L507 AbstractCegarLoop]: Abstraction has has 27 places, 29 transitions, 127 flow [2024-02-20 12:11:10,438 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2024-02-20 12:11:10,438 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:10,438 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:10,438 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-20 12:11:10,439 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:10,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:10,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1015057899, now seen corresponding path program 1 times [2024-02-20 12:11:10,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:10,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478386565] [2024-02-20 12:11:10,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:10,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:10,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:10,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:10,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478386565] [2024-02-20 12:11:10,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478386565] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:11:10,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:11:10,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-20 12:11:10,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504579114] [2024-02-20 12:11:10,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:11:10,655 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 12:11:10,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:10,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 12:11:10,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-20 12:11:10,668 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:11:10,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 29 transitions, 127 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) [2024-02-20 12:11:10,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:10,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:11:10,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:10,892 INFO L124 PetriNetUnfolderBase]: 148/296 cut-off events. [2024-02-20 12:11:10,892 INFO L125 PetriNetUnfolderBase]: For 88/92 co-relation queries the response was YES. [2024-02-20 12:11:10,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 824 conditions, 296 events. 148/296 cut-off events. For 88/92 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1112 event pairs, 33 based on Foata normal form. 2/296 useless extension candidates. Maximal degree in co-relation 667. Up to 171 conditions per place. [2024-02-20 12:11:10,899 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 43 selfloop transitions, 4 changer transitions 13/62 dead transitions. [2024-02-20 12:11:10,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 62 transitions, 386 flow [2024-02-20 12:11:10,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 12:11:10,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 12:11:10,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-02-20 12:11:10,903 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5391304347826087 [2024-02-20 12:11:10,904 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2024-02-20 12:11:10,904 INFO L507 AbstractCegarLoop]: Abstraction has has 31 places, 62 transitions, 386 flow [2024-02-20 12:11:10,904 INFO L508 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) [2024-02-20 12:11:10,904 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:10,905 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:10,905 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-20 12:11:10,906 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:10,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:10,908 INFO L85 PathProgramCache]: Analyzing trace with hash 113580279, now seen corresponding path program 2 times [2024-02-20 12:11:10,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:10,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343536165] [2024-02-20 12:11:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:10,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:11,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:11,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343536165] [2024-02-20 12:11:11,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343536165] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:11,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648156590] [2024-02-20 12:11:11,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:11:11,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:11,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:11,044 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) [2024-02-20 12:11:11,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-20 12:11:11,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:11:11,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:11,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-20 12:11:11,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:11,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:11,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648156590] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:11,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:11,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-02-20 12:11:11,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906652104] [2024-02-20 12:11:11,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:11,243 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-20 12:11:11,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:11,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-20 12:11:11,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-02-20 12:11:11,255 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:11:11,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 62 transitions, 386 flow. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 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) [2024-02-20 12:11:11,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:11,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:11:11,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:11,547 INFO L124 PetriNetUnfolderBase]: 274/490 cut-off events. [2024-02-20 12:11:11,548 INFO L125 PetriNetUnfolderBase]: For 286/286 co-relation queries the response was YES. [2024-02-20 12:11:11,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1835 conditions, 490 events. 274/490 cut-off events. For 286/286 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1880 event pairs, 3 based on Foata normal form. 14/504 useless extension candidates. Maximal degree in co-relation 1550. Up to 313 conditions per place. [2024-02-20 12:11:11,553 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 105 selfloop transitions, 36 changer transitions 18/160 dead transitions. [2024-02-20 12:11:11,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 160 transitions, 1264 flow [2024-02-20 12:11:11,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-20 12:11:11,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-20 12:11:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 137 transitions. [2024-02-20 12:11:11,556 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4254658385093168 [2024-02-20 12:11:11,557 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 19 predicate places. [2024-02-20 12:11:11,557 INFO L507 AbstractCegarLoop]: Abstraction has has 44 places, 160 transitions, 1264 flow [2024-02-20 12:11:11,557 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 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) [2024-02-20 12:11:11,558 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:11,558 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:11,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:11,771 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:11,771 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:11,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:11,772 INFO L85 PathProgramCache]: Analyzing trace with hash 350184225, now seen corresponding path program 3 times [2024-02-20 12:11:11,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:11,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427140603] [2024-02-20 12:11:11,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:11,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:11,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:11,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427140603] [2024-02-20 12:11:11,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427140603] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:11:11,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:11:11,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-20 12:11:11,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816682513] [2024-02-20 12:11:11,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:11:11,879 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 12:11:11,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:11,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 12:11:11,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-20 12:11:11,887 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:11:11,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 160 transitions, 1264 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2024-02-20 12:11:11,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:11,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:11:11,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:12,046 INFO L124 PetriNetUnfolderBase]: 295/525 cut-off events. [2024-02-20 12:11:12,047 INFO L125 PetriNetUnfolderBase]: For 276/276 co-relation queries the response was YES. [2024-02-20 12:11:12,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2483 conditions, 525 events. 295/525 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2044 event pairs, 3 based on Foata normal form. 6/531 useless extension candidates. Maximal degree in co-relation 2130. Up to 396 conditions per place. [2024-02-20 12:11:12,053 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 142 selfloop transitions, 20 changer transitions 19/182 dead transitions. [2024-02-20 12:11:12,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 182 transitions, 1790 flow [2024-02-20 12:11:12,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 12:11:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 12:11:12,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-02-20 12:11:12,056 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5391304347826087 [2024-02-20 12:11:12,057 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 23 predicate places. [2024-02-20 12:11:12,057 INFO L507 AbstractCegarLoop]: Abstraction has has 48 places, 182 transitions, 1790 flow [2024-02-20 12:11:12,058 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2024-02-20 12:11:12,058 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:12,058 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:12,058 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-20 12:11:12,058 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:12,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:12,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1425895381, now seen corresponding path program 4 times [2024-02-20 12:11:12,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:12,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166617754] [2024-02-20 12:11:12,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:12,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:12,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:12,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166617754] [2024-02-20 12:11:12,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166617754] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:11:12,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:11:12,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-20 12:11:12,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800128839] [2024-02-20 12:11:12,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:11:12,135 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 12:11:12,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:12,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 12:11:12,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-02-20 12:11:12,146 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:11:12,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 182 transitions, 1790 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) [2024-02-20 12:11:12,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:12,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:11:12,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:12,255 INFO L124 PetriNetUnfolderBase]: 296/528 cut-off events. [2024-02-20 12:11:12,255 INFO L125 PetriNetUnfolderBase]: For 555/555 co-relation queries the response was YES. [2024-02-20 12:11:12,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2971 conditions, 528 events. 296/528 cut-off events. For 555/555 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2076 event pairs, 3 based on Foata normal form. 2/530 useless extension candidates. Maximal degree in co-relation 2554. Up to 398 conditions per place. [2024-02-20 12:11:12,261 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 135 selfloop transitions, 16 changer transitions 22/184 dead transitions. [2024-02-20 12:11:12,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 184 transitions, 2156 flow [2024-02-20 12:11:12,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 12:11:12,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 12:11:12,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-02-20 12:11:12,263 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-02-20 12:11:12,266 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 27 predicate places. [2024-02-20 12:11:12,266 INFO L507 AbstractCegarLoop]: Abstraction has has 52 places, 184 transitions, 2156 flow [2024-02-20 12:11:12,266 INFO L508 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) [2024-02-20 12:11:12,266 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:12,266 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:12,267 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-20 12:11:12,267 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:12,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:12,267 INFO L85 PathProgramCache]: Analyzing trace with hash -899578433, now seen corresponding path program 5 times [2024-02-20 12:11:12,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:12,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130424951] [2024-02-20 12:11:12,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:12,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:12,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:12,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130424951] [2024-02-20 12:11:12,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130424951] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:11:12,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:11:12,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-20 12:11:12,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661126256] [2024-02-20 12:11:12,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:11:12,379 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-20 12:11:12,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:12,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-20 12:11:12,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-02-20 12:11:12,385 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:11:12,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 184 transitions, 2156 flow. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 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) [2024-02-20 12:11:12,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:12,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:11:12,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:12,543 INFO L124 PetriNetUnfolderBase]: 366/648 cut-off events. [2024-02-20 12:11:12,544 INFO L125 PetriNetUnfolderBase]: For 513/513 co-relation queries the response was YES. [2024-02-20 12:11:12,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4303 conditions, 648 events. 366/648 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2706 event pairs, 3 based on Foata normal form. 10/658 useless extension candidates. Maximal degree in co-relation 3818. Up to 518 conditions per place. [2024-02-20 12:11:12,553 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 172 selfloop transitions, 23 changer transitions 22/218 dead transitions. [2024-02-20 12:11:12,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 218 transitions, 2989 flow [2024-02-20 12:11:12,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-20 12:11:12,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-20 12:11:12,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2024-02-20 12:11:12,554 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2024-02-20 12:11:12,554 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 32 predicate places. [2024-02-20 12:11:12,555 INFO L507 AbstractCegarLoop]: Abstraction has has 57 places, 218 transitions, 2989 flow [2024-02-20 12:11:12,555 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 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) [2024-02-20 12:11:12,555 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:12,555 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:12,555 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-20 12:11:12,555 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:12,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:12,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1828836117, now seen corresponding path program 6 times [2024-02-20 12:11:12,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:12,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811796250] [2024-02-20 12:11:12,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:12,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:12,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:12,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:12,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811796250] [2024-02-20 12:11:12,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811796250] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:11:12,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:11:12,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-20 12:11:12,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579540021] [2024-02-20 12:11:12,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:11:12,656 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 12:11:12,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:12,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 12:11:12,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-20 12:11:12,669 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-02-20 12:11:12,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 218 transitions, 2989 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) [2024-02-20 12:11:12,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:12,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-02-20 12:11:12,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:12,824 INFO L124 PetriNetUnfolderBase]: 364/646 cut-off events. [2024-02-20 12:11:12,824 INFO L125 PetriNetUnfolderBase]: For 764/764 co-relation queries the response was YES. [2024-02-20 12:11:12,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4872 conditions, 646 events. 364/646 cut-off events. For 764/764 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2714 event pairs, 3 based on Foata normal form. 2/648 useless extension candidates. Maximal degree in co-relation 4323. Up to 518 conditions per place. [2024-02-20 12:11:12,833 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 155 selfloop transitions, 25 changer transitions 24/217 dead transitions. [2024-02-20 12:11:12,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 217 transitions, 3385 flow [2024-02-20 12:11:12,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 12:11:12,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 12:11:12,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-02-20 12:11:12,834 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5391304347826087 [2024-02-20 12:11:12,835 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 36 predicate places. [2024-02-20 12:11:12,835 INFO L507 AbstractCegarLoop]: Abstraction has has 61 places, 217 transitions, 3385 flow [2024-02-20 12:11:12,835 INFO L508 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) [2024-02-20 12:11:12,835 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:12,835 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:12,835 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-20 12:11:12,836 INFO L432 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:12,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:12,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1390420023, now seen corresponding path program 7 times [2024-02-20 12:11:12,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:12,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350564618] [2024-02-20 12:11:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:12,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:12,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:12,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350564618] [2024-02-20 12:11:12,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350564618] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:11:12,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:11:12,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-20 12:11:12,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544589995] [2024-02-20 12:11:12,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:11:12,908 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 12:11:12,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:12,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 12:11:12,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-20 12:11:12,915 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:11:12,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 217 transitions, 3385 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2024-02-20 12:11:12,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:12,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:11:12,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:13,054 INFO L124 PetriNetUnfolderBase]: 359/639 cut-off events. [2024-02-20 12:11:13,054 INFO L125 PetriNetUnfolderBase]: For 836/836 co-relation queries the response was YES. [2024-02-20 12:11:13,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5452 conditions, 639 events. 359/639 cut-off events. For 836/836 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2676 event pairs, 3 based on Foata normal form. 6/645 useless extension candidates. Maximal degree in co-relation 4835. Up to 516 conditions per place. [2024-02-20 12:11:13,063 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 166 selfloop transitions, 25 changer transitions 24/216 dead transitions. [2024-02-20 12:11:13,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 216 transitions, 3773 flow [2024-02-20 12:11:13,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 12:11:13,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 12:11:13,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-02-20 12:11:13,065 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-02-20 12:11:13,066 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 40 predicate places. [2024-02-20 12:11:13,066 INFO L507 AbstractCegarLoop]: Abstraction has has 65 places, 216 transitions, 3773 flow [2024-02-20 12:11:13,066 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2024-02-20 12:11:13,066 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:13,066 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:13,067 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-20 12:11:13,067 INFO L432 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:13,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:13,067 INFO L85 PathProgramCache]: Analyzing trace with hash 310166981, now seen corresponding path program 8 times [2024-02-20 12:11:13,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:13,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317692847] [2024-02-20 12:11:13,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:13,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:13,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:13,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317692847] [2024-02-20 12:11:13,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317692847] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:13,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249971162] [2024-02-20 12:11:13,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:11:13,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:13,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:13,142 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) [2024-02-20 12:11:13,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-20 12:11:13,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:11:13,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:13,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-20 12:11:13,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:13,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:13,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:13,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249971162] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:13,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:13,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-02-20 12:11:13,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992757099] [2024-02-20 12:11:13,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:13,316 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-20 12:11:13,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:13,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-20 12:11:13,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-02-20 12:11:13,326 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:11:13,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 216 transitions, 3773 flow. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 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) [2024-02-20 12:11:13,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:13,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:11:13,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:13,535 INFO L124 PetriNetUnfolderBase]: 343/610 cut-off events. [2024-02-20 12:11:13,536 INFO L125 PetriNetUnfolderBase]: For 739/739 co-relation queries the response was YES. [2024-02-20 12:11:13,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5809 conditions, 610 events. 343/610 cut-off events. For 739/739 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2504 event pairs, 3 based on Foata normal form. 12/622 useless extension candidates. Maximal degree in co-relation 5146. Up to 488 conditions per place. [2024-02-20 12:11:13,544 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 149 selfloop transitions, 38 changer transitions 23/211 dead transitions. [2024-02-20 12:11:13,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 211 transitions, 4100 flow [2024-02-20 12:11:13,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-20 12:11:13,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-20 12:11:13,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-02-20 12:11:13,546 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5108695652173914 [2024-02-20 12:11:13,547 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 47 predicate places. [2024-02-20 12:11:13,547 INFO L507 AbstractCegarLoop]: Abstraction has has 72 places, 211 transitions, 4100 flow [2024-02-20 12:11:13,547 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 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) [2024-02-20 12:11:13,548 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:13,548 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:13,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:13,771 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-02-20 12:11:13,771 INFO L432 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:13,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:13,772 INFO L85 PathProgramCache]: Analyzing trace with hash 440281538, now seen corresponding path program 1 times [2024-02-20 12:11:13,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:13,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501788151] [2024-02-20 12:11:13,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:13,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:11:13,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:13,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501788151] [2024-02-20 12:11:13,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501788151] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:13,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791531586] [2024-02-20 12:11:13,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:13,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:13,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:13,840 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) [2024-02-20 12:11:13,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-20 12:11:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:13,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:11:13,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:13,939 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-20 12:11:13,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791531586] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:11:13,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-20 12:11:13,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 5 [2024-02-20 12:11:13,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927361591] [2024-02-20 12:11:13,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:11:13,940 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 12:11:13,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:13,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 12:11:13,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-02-20 12:11:13,941 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 23 [2024-02-20 12:11:13,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 211 transitions, 4100 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2024-02-20 12:11:13,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:13,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 23 [2024-02-20 12:11:13,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:14,119 INFO L124 PetriNetUnfolderBase]: 634/1125 cut-off events. [2024-02-20 12:11:14,119 INFO L125 PetriNetUnfolderBase]: For 2389/2389 co-relation queries the response was YES. [2024-02-20 12:11:14,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11626 conditions, 1125 events. 634/1125 cut-off events. For 2389/2389 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5186 event pairs, 29 based on Foata normal form. 13/1138 useless extension candidates. Maximal degree in co-relation 10741. Up to 1007 conditions per place. [2024-02-20 12:11:14,135 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 213 selfloop transitions, 31 changer transitions 73/356 dead transitions. [2024-02-20 12:11:14,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 356 transitions, 7689 flow [2024-02-20 12:11:14,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 12:11:14,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 12:11:14,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-02-20 12:11:14,136 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-02-20 12:11:14,137 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 50 predicate places. [2024-02-20 12:11:14,137 INFO L507 AbstractCegarLoop]: Abstraction has has 75 places, 356 transitions, 7689 flow [2024-02-20 12:11:14,137 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2024-02-20 12:11:14,137 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:14,137 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:14,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:14,353 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:14,354 INFO L432 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:14,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:14,354 INFO L85 PathProgramCache]: Analyzing trace with hash 551769052, now seen corresponding path program 2 times [2024-02-20 12:11:14,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:14,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41246474] [2024-02-20 12:11:14,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:14,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:14,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:14,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41246474] [2024-02-20 12:11:14,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41246474] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:14,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025930404] [2024-02-20 12:11:14,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:11:14,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:14,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:14,444 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) [2024-02-20 12:11:14,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-20 12:11:14,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:11:14,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:14,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:11:14,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:14,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:14,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025930404] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:14,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:14,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-02-20 12:11:14,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43953462] [2024-02-20 12:11:14,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:14,619 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-20 12:11:14,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:14,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-20 12:11:14,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-02-20 12:11:14,632 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:11:14,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 356 transitions, 7689 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) [2024-02-20 12:11:14,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:14,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:11:14,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:15,083 INFO L124 PetriNetUnfolderBase]: 819/1449 cut-off events. [2024-02-20 12:11:15,084 INFO L125 PetriNetUnfolderBase]: For 3131/3131 co-relation queries the response was YES. [2024-02-20 12:11:15,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16397 conditions, 1449 events. 819/1449 cut-off events. For 3131/3131 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7031 event pairs, 19 based on Foata normal form. 22/1471 useless extension candidates. Maximal degree in co-relation 15418. Up to 1331 conditions per place. [2024-02-20 12:11:15,105 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 288 selfloop transitions, 106 changer transitions 123/518 dead transitions. [2024-02-20 12:11:15,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 518 transitions, 12158 flow [2024-02-20 12:11:15,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-20 12:11:15,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-20 12:11:15,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 154 transitions. [2024-02-20 12:11:15,106 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4463768115942029 [2024-02-20 12:11:15,107 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 64 predicate places. [2024-02-20 12:11:15,107 INFO L507 AbstractCegarLoop]: Abstraction has has 89 places, 518 transitions, 12158 flow [2024-02-20 12:11:15,107 INFO L508 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) [2024-02-20 12:11:15,107 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:15,107 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:15,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:15,323 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:15,323 INFO L432 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:15,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:15,324 INFO L85 PathProgramCache]: Analyzing trace with hash -654835180, now seen corresponding path program 3 times [2024-02-20 12:11:15,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:15,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854831637] [2024-02-20 12:11:15,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:15,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:15,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:15,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854831637] [2024-02-20 12:11:15,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854831637] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:15,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428540263] [2024-02-20 12:11:15,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:11:15,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:15,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:15,402 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) [2024-02-20 12:11:15,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-20 12:11:15,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-20 12:11:15,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:15,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:11:15,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:15,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:15,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428540263] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:15,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:15,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-02-20 12:11:15,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833558886] [2024-02-20 12:11:15,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:15,585 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-20 12:11:15,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:15,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-20 12:11:15,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-02-20 12:11:15,610 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:11:15,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 518 transitions, 12158 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) [2024-02-20 12:11:15,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:15,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:11:15,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:16,259 INFO L124 PetriNetUnfolderBase]: 1313/2207 cut-off events. [2024-02-20 12:11:16,259 INFO L125 PetriNetUnfolderBase]: For 4005/4005 co-relation queries the response was YES. [2024-02-20 12:11:16,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27167 conditions, 2207 events. 1313/2207 cut-off events. For 4005/4005 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10741 event pairs, 29 based on Foata normal form. 12/2219 useless extension candidates. Maximal degree in co-relation 26106. Up to 2089 conditions per place. [2024-02-20 12:11:16,291 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 464 selfloop transitions, 126 changer transitions 142/733 dead transitions. [2024-02-20 12:11:16,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 733 transitions, 18638 flow [2024-02-20 12:11:16,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-20 12:11:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-20 12:11:16,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 154 transitions. [2024-02-20 12:11:16,293 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4782608695652174 [2024-02-20 12:11:16,293 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 77 predicate places. [2024-02-20 12:11:16,293 INFO L507 AbstractCegarLoop]: Abstraction has has 102 places, 733 transitions, 18638 flow [2024-02-20 12:11:16,294 INFO L508 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) [2024-02-20 12:11:16,294 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:16,294 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:16,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:16,519 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-02-20 12:11:16,520 INFO L432 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:16,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:16,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1811945392, now seen corresponding path program 4 times [2024-02-20 12:11:16,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:16,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506829159] [2024-02-20 12:11:16,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:16,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:16,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:16,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506829159] [2024-02-20 12:11:16,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506829159] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:16,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188356727] [2024-02-20 12:11:16,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:11:16,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:16,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:16,596 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) [2024-02-20 12:11:16,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-20 12:11:16,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:11:16,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:16,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:11:16,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:16,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:16,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188356727] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:16,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:16,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-20 12:11:16,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122081683] [2024-02-20 12:11:16,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:16,757 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-20 12:11:16,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:16,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-20 12:11:16,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-02-20 12:11:16,770 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:11:16,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 733 transitions, 18638 flow. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 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) [2024-02-20 12:11:16,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:16,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:11:16,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:17,730 INFO L124 PetriNetUnfolderBase]: 1733/2917 cut-off events. [2024-02-20 12:11:17,730 INFO L125 PetriNetUnfolderBase]: For 5394/5394 co-relation queries the response was YES. [2024-02-20 12:11:17,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38664 conditions, 2917 events. 1733/2917 cut-off events. For 5394/5394 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15186 event pairs, 21 based on Foata normal form. 70/2987 useless extension candidates. Maximal degree in co-relation 37521. Up to 2799 conditions per place. [2024-02-20 12:11:17,770 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 598 selfloop transitions, 209 changer transitions 170/978 dead transitions. [2024-02-20 12:11:17,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 978 transitions, 26798 flow [2024-02-20 12:11:17,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-20 12:11:17,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-20 12:11:17,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 170 transitions. [2024-02-20 12:11:17,772 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.46195652173913043 [2024-02-20 12:11:17,772 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 92 predicate places. [2024-02-20 12:11:17,772 INFO L507 AbstractCegarLoop]: Abstraction has has 117 places, 978 transitions, 26798 flow [2024-02-20 12:11:17,772 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 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) [2024-02-20 12:11:17,772 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:17,773 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:17,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-02-20 12:11:17,996 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:17,996 INFO L432 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:17,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:17,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1730546336, now seen corresponding path program 5 times [2024-02-20 12:11:17,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:17,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434026953] [2024-02-20 12:11:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:17,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:18,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:18,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434026953] [2024-02-20 12:11:18,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434026953] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:18,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084228405] [2024-02-20 12:11:18,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 12:11:18,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:18,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:18,103 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) [2024-02-20 12:11:18,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-20 12:11:18,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 12:11:18,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:18,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:11:18,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:18,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:18,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084228405] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:18,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:18,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-02-20 12:11:18,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764506616] [2024-02-20 12:11:18,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:18,254 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-20 12:11:18,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:18,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-20 12:11:18,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-02-20 12:11:18,264 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:11:18,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 978 transitions, 26798 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) [2024-02-20 12:11:18,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:18,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:11:18,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:19,673 INFO L124 PetriNetUnfolderBase]: 1834/3132 cut-off events. [2024-02-20 12:11:19,673 INFO L125 PetriNetUnfolderBase]: For 5506/5506 co-relation queries the response was YES. [2024-02-20 12:11:19,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44483 conditions, 3132 events. 1834/3132 cut-off events. For 5506/5506 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16824 event pairs, 27 based on Foata normal form. 60/3192 useless extension candidates. Maximal degree in co-relation 43258. Up to 3014 conditions per place. [2024-02-20 12:11:19,715 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 636 selfloop transitions, 257 changer transitions 199/1093 dead transitions. [2024-02-20 12:11:19,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 1093 transitions, 32120 flow [2024-02-20 12:11:19,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-20 12:11:19,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-20 12:11:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 263 transitions. [2024-02-20 12:11:19,719 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4397993311036789 [2024-02-20 12:11:19,720 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 117 predicate places. [2024-02-20 12:11:19,720 INFO L507 AbstractCegarLoop]: Abstraction has has 142 places, 1093 transitions, 32120 flow [2024-02-20 12:11:19,720 INFO L508 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) [2024-02-20 12:11:19,720 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:19,720 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:19,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:19,940 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:19,941 INFO L432 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:19,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:19,941 INFO L85 PathProgramCache]: Analyzing trace with hash -222089354, now seen corresponding path program 6 times [2024-02-20 12:11:19,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:19,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905212388] [2024-02-20 12:11:19,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:19,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:20,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:20,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905212388] [2024-02-20 12:11:20,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905212388] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:20,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783165456] [2024-02-20 12:11:20,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 12:11:20,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:20,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:20,021 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) [2024-02-20 12:11:20,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-20 12:11:20,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 12:11:20,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:20,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:11:20,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:20,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:20,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783165456] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:20,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:20,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-20 12:11:20,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590384533] [2024-02-20 12:11:20,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:20,189 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-20 12:11:20,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:20,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-20 12:11:20,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-02-20 12:11:20,204 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:11:20,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 1093 transitions, 32120 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) [2024-02-20 12:11:20,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:20,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:11:20,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:21,577 INFO L124 PetriNetUnfolderBase]: 2190/3704 cut-off events. [2024-02-20 12:11:21,577 INFO L125 PetriNetUnfolderBase]: For 6323/6323 co-relation queries the response was YES. [2024-02-20 12:11:21,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56390 conditions, 3704 events. 2190/3704 cut-off events. For 6323/6323 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 20274 event pairs, 41 based on Foata normal form. 18/3722 useless extension candidates. Maximal degree in co-relation 55083. Up to 3579 conditions per place. [2024-02-20 12:11:21,629 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 809 selfloop transitions, 229 changer transitions 218/1257 dead transitions. [2024-02-20 12:11:21,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 1257 transitions, 39466 flow [2024-02-20 12:11:21,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-02-20 12:11:21,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-02-20 12:11:21,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 174 transitions. [2024-02-20 12:11:21,631 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.42028985507246375 [2024-02-20 12:11:21,632 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 134 predicate places. [2024-02-20 12:11:21,632 INFO L507 AbstractCegarLoop]: Abstraction has has 159 places, 1257 transitions, 39466 flow [2024-02-20 12:11:21,632 INFO L508 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) [2024-02-20 12:11:21,632 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:21,633 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:21,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:21,849 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-02-20 12:11:21,849 INFO L432 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:21,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:21,850 INFO L85 PathProgramCache]: Analyzing trace with hash -36631118, now seen corresponding path program 7 times [2024-02-20 12:11:21,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:21,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248396535] [2024-02-20 12:11:21,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:21,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:21,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:21,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248396535] [2024-02-20 12:11:21,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248396535] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:21,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162729773] [2024-02-20 12:11:21,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 12:11:21,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:21,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:21,928 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) [2024-02-20 12:11:21,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-20 12:11:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:22,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:11:22,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:22,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:22,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162729773] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:22,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:22,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-20 12:11:22,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718633088] [2024-02-20 12:11:22,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:22,138 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-20 12:11:22,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:22,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-20 12:11:22,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-02-20 12:11:22,146 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:11:22,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 1257 transitions, 39466 flow. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 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) [2024-02-20 12:11:22,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:22,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:11:22,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:24,393 INFO L124 PetriNetUnfolderBase]: 3312/5586 cut-off events. [2024-02-20 12:11:24,393 INFO L125 PetriNetUnfolderBase]: For 8669/8669 co-relation queries the response was YES. [2024-02-20 12:11:24,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90299 conditions, 5586 events. 3312/5586 cut-off events. For 8669/8669 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 33132 event pairs, 51 based on Foata normal form. 34/5620 useless extension candidates. Maximal degree in co-relation 88910. Up to 5461 conditions per place. [2024-02-20 12:11:24,593 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1218 selfloop transitions, 466 changer transitions 294/1979 dead transitions. [2024-02-20 12:11:24,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 1979 transitions, 65809 flow [2024-02-20 12:11:24,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-02-20 12:11:24,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-02-20 12:11:24,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 287 transitions. [2024-02-20 12:11:24,595 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4302848575712144 [2024-02-20 12:11:24,595 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 162 predicate places. [2024-02-20 12:11:24,596 INFO L507 AbstractCegarLoop]: Abstraction has has 187 places, 1979 transitions, 65809 flow [2024-02-20 12:11:24,596 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 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) [2024-02-20 12:11:24,596 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:24,596 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:24,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:24,812 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-02-20 12:11:24,812 INFO L432 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:24,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:24,813 INFO L85 PathProgramCache]: Analyzing trace with hash -791454244, now seen corresponding path program 8 times [2024-02-20 12:11:24,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:24,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722196653] [2024-02-20 12:11:24,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:24,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:24,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:24,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:24,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722196653] [2024-02-20 12:11:24,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722196653] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:24,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920319204] [2024-02-20 12:11:24,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:11:24,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:24,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:24,910 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) [2024-02-20 12:11:24,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-20 12:11:24,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:11:24,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:24,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:11:24,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:25,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:25,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920319204] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:25,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:25,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-02-20 12:11:25,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4988483] [2024-02-20 12:11:25,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:25,083 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-20 12:11:25,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:25,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-20 12:11:25,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-02-20 12:11:25,101 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:11:25,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 1979 transitions, 65809 flow. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 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) [2024-02-20 12:11:25,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:25,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:11:25,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:27,923 INFO L124 PetriNetUnfolderBase]: 3577/6021 cut-off events. [2024-02-20 12:11:27,923 INFO L125 PetriNetUnfolderBase]: For 9145/9145 co-relation queries the response was YES. [2024-02-20 12:11:27,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103250 conditions, 6021 events. 3577/6021 cut-off events. For 9145/9145 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 36002 event pairs, 45 based on Foata normal form. 58/6079 useless extension candidates. Maximal degree in co-relation 101779. Up to 5896 conditions per place. [2024-02-20 12:11:28,022 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1275 selfloop transitions, 540 changer transitions 328/2144 dead transitions. [2024-02-20 12:11:28,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 2144 transitions, 75565 flow [2024-02-20 12:11:28,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-20 12:11:28,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-20 12:11:28,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 252 transitions. [2024-02-20 12:11:28,025 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4214046822742475 [2024-02-20 12:11:28,025 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 187 predicate places. [2024-02-20 12:11:28,025 INFO L507 AbstractCegarLoop]: Abstraction has has 212 places, 2144 transitions, 75565 flow [2024-02-20 12:11:28,026 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 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) [2024-02-20 12:11:28,026 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:28,026 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:28,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:28,247 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-02-20 12:11:28,247 INFO L432 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:28,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:28,248 INFO L85 PathProgramCache]: Analyzing trace with hash 35138512, now seen corresponding path program 9 times [2024-02-20 12:11:28,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:28,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873742141] [2024-02-20 12:11:28,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:28,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:28,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:28,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:28,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873742141] [2024-02-20 12:11:28,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873742141] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:28,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274661329] [2024-02-20 12:11:28,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:11:28,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:28,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:28,333 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) [2024-02-20 12:11:28,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-20 12:11:28,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-20 12:11:28,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:28,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:11:28,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:28,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:28,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274661329] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:28,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:28,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-20 12:11:28,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713539312] [2024-02-20 12:11:28,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:28,646 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-20 12:11:28,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:28,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-20 12:11:28,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-02-20 12:11:28,662 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:11:28,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 2144 transitions, 75565 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) [2024-02-20 12:11:28,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:28,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:11:28,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:32,042 INFO L124 PetriNetUnfolderBase]: 4027/6743 cut-off events. [2024-02-20 12:11:32,042 INFO L125 PetriNetUnfolderBase]: For 11535/11535 co-relation queries the response was YES. [2024-02-20 12:11:32,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122520 conditions, 6743 events. 4027/6743 cut-off events. For 11535/11535 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 41023 event pairs, 45 based on Foata normal form. 18/6761 useless extension candidates. Maximal degree in co-relation 120967. Up to 6618 conditions per place. [2024-02-20 12:11:32,130 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 1871 selfloop transitions, 132 changer transitions 350/2354 dead transitions. [2024-02-20 12:11:32,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 2354 transitions, 87725 flow [2024-02-20 12:11:32,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-20 12:11:32,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-20 12:11:32,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 167 transitions. [2024-02-20 12:11:32,133 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.42710997442455245 [2024-02-20 12:11:32,134 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 203 predicate places. [2024-02-20 12:11:32,134 INFO L507 AbstractCegarLoop]: Abstraction has has 228 places, 2354 transitions, 87725 flow [2024-02-20 12:11:32,134 INFO L508 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) [2024-02-20 12:11:32,134 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:32,134 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:32,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:32,348 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-02-20 12:11:32,348 INFO L432 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:32,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:32,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1117059984, now seen corresponding path program 10 times [2024-02-20 12:11:32,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:32,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460429337] [2024-02-20 12:11:32,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:32,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:32,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:32,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460429337] [2024-02-20 12:11:32,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460429337] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:32,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340240595] [2024-02-20 12:11:32,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:11:32,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:32,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:32,424 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) [2024-02-20 12:11:32,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-20 12:11:32,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:11:32,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:32,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:11:32,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:32,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:32,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340240595] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:32,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:32,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-20 12:11:32,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884281051] [2024-02-20 12:11:32,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:32,599 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-20 12:11:32,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:32,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-20 12:11:32,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-02-20 12:11:32,607 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:11:32,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 2354 transitions, 87725 flow. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 15 states have internal predecessors, (88), 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) [2024-02-20 12:11:32,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:32,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:11:32,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:37,258 INFO L124 PetriNetUnfolderBase]: 4404/7352 cut-off events. [2024-02-20 12:11:37,258 INFO L125 PetriNetUnfolderBase]: For 12179/12179 co-relation queries the response was YES. [2024-02-20 12:11:37,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140901 conditions, 7352 events. 4404/7352 cut-off events. For 12179/12179 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 45376 event pairs, 55 based on Foata normal form. 90/7442 useless extension candidates. Maximal degree in co-relation 139266. Up to 7227 conditions per place. [2024-02-20 12:11:37,381 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1746 selfloop transitions, 426 changer transitions 389/2562 dead transitions. [2024-02-20 12:11:37,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 2562 transitions, 100604 flow [2024-02-20 12:11:37,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-20 12:11:37,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-20 12:11:37,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 217 transitions. [2024-02-20 12:11:37,383 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4717391304347826 [2024-02-20 12:11:37,384 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 222 predicate places. [2024-02-20 12:11:37,385 INFO L507 AbstractCegarLoop]: Abstraction has has 247 places, 2562 transitions, 100604 flow [2024-02-20 12:11:37,385 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 15 states have internal predecessors, (88), 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) [2024-02-20 12:11:37,385 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:37,385 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:37,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-02-20 12:11:37,596 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:37,597 INFO L432 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:37,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:37,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1435060552, now seen corresponding path program 11 times [2024-02-20 12:11:37,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:37,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196089486] [2024-02-20 12:11:37,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:37,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:37,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:37,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196089486] [2024-02-20 12:11:37,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196089486] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:37,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135116839] [2024-02-20 12:11:37,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 12:11:37,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:37,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:37,693 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) [2024-02-20 12:11:37,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-20 12:11:37,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:11:37,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:37,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:11:37,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:37,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:37,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:11:37,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135116839] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:37,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:37,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-02-20 12:11:37,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568862232] [2024-02-20 12:11:37,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:37,853 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-20 12:11:37,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:37,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-20 12:11:37,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-02-20 12:11:37,859 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:11:37,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 2562 transitions, 100604 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) [2024-02-20 12:11:37,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:37,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:11:37,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:43,040 INFO L124 PetriNetUnfolderBase]: 4403/7353 cut-off events. [2024-02-20 12:11:43,040 INFO L125 PetriNetUnfolderBase]: For 12163/12163 co-relation queries the response was YES. [2024-02-20 12:11:43,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148277 conditions, 7353 events. 4403/7353 cut-off events. For 12163/12163 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 45456 event pairs, 59 based on Foata normal form. 8/7361 useless extension candidates. Maximal degree in co-relation 146560. Up to 7228 conditions per place. [2024-02-20 12:11:43,127 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 2052 selfloop transitions, 116 changer transitions 394/2563 dead transitions. [2024-02-20 12:11:43,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 2563 transitions, 105772 flow [2024-02-20 12:11:43,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-20 12:11:43,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-20 12:11:43,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-02-20 12:11:43,128 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4782608695652174 [2024-02-20 12:11:43,128 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 232 predicate places. [2024-02-20 12:11:43,128 INFO L507 AbstractCegarLoop]: Abstraction has has 257 places, 2563 transitions, 105772 flow [2024-02-20 12:11:43,128 INFO L508 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) [2024-02-20 12:11:43,128 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:43,128 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:43,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:43,332 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-02-20 12:11:43,332 INFO L432 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:43,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:43,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1053008284, now seen corresponding path program 12 times [2024-02-20 12:11:43,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:43,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748157726] [2024-02-20 12:11:43,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:43,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:43,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:43,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748157726] [2024-02-20 12:11:43,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748157726] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:43,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262751686] [2024-02-20 12:11:43,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 12:11:43,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:43,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:43,405 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) [2024-02-20 12:11:43,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-20 12:11:43,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-20 12:11:43,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:43,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 12:11:43,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:43,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:11:43,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262751686] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:43,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:43,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-02-20 12:11:43,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808513651] [2024-02-20 12:11:43,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:43,585 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-20 12:11:43,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:43,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-20 12:11:43,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-02-20 12:11:43,596 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:11:43,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 2563 transitions, 105772 flow. Second operand has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 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) [2024-02-20 12:11:43,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:43,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:11:43,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:48,963 INFO L124 PetriNetUnfolderBase]: 4625/7711 cut-off events. [2024-02-20 12:11:48,963 INFO L125 PetriNetUnfolderBase]: For 12290/12290 co-relation queries the response was YES. [2024-02-20 12:11:48,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163105 conditions, 7711 events. 4625/7711 cut-off events. For 12290/12290 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 47769 event pairs, 67 based on Foata normal form. 58/7769 useless extension candidates. Maximal degree in co-relation 161306. Up to 7586 conditions per place. [2024-02-20 12:11:49,073 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1773 selfloop transitions, 472 changer transitions 423/2669 dead transitions. [2024-02-20 12:11:49,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 2669 transitions, 115489 flow [2024-02-20 12:11:49,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-20 12:11:49,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-20 12:11:49,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 199 transitions. [2024-02-20 12:11:49,075 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4326086956521739 [2024-02-20 12:11:49,076 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 251 predicate places. [2024-02-20 12:11:49,076 INFO L507 AbstractCegarLoop]: Abstraction has has 276 places, 2669 transitions, 115489 flow [2024-02-20 12:11:49,076 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 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) [2024-02-20 12:11:49,076 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:49,076 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:49,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:49,276 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:49,277 INFO L432 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:49,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:49,278 INFO L85 PathProgramCache]: Analyzing trace with hash -492955997, now seen corresponding path program 13 times [2024-02-20 12:11:49,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:49,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957425347] [2024-02-20 12:11:49,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:49,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 12:11:49,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:49,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957425347] [2024-02-20 12:11:49,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957425347] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:49,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766991355] [2024-02-20 12:11:49,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 12:11:49,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:49,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:49,375 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) [2024-02-20 12:11:49,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-20 12:11:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:49,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:11:49,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:49,491 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:49,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:49,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766991355] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:49,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:49,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 7 [2024-02-20 12:11:49,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500569309] [2024-02-20 12:11:49,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:49,544 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-20 12:11:49,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:49,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-20 12:11:49,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-02-20 12:11:49,545 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 23 [2024-02-20 12:11:49,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 2669 transitions, 115489 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:11:49,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:49,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 23 [2024-02-20 12:11:49,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:11:58,868 INFO L124 PetriNetUnfolderBase]: 8117/13452 cut-off events. [2024-02-20 12:11:58,869 INFO L125 PetriNetUnfolderBase]: For 33340/33340 co-relation queries the response was YES. [2024-02-20 12:11:58,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294996 conditions, 13452 events. 8117/13452 cut-off events. For 33340/33340 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 90755 event pairs, 115 based on Foata normal form. 51/13503 useless extension candidates. Maximal degree in co-relation 292641. Up to 13325 conditions per place. [2024-02-20 12:11:59,087 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 2772 selfloop transitions, 564 changer transitions 709/4391 dead transitions. [2024-02-20 12:11:59,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 4391 transitions, 199716 flow [2024-02-20 12:11:59,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 12:11:59,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 12:11:59,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-02-20 12:11:59,088 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7739130434782608 [2024-02-20 12:11:59,088 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 255 predicate places. [2024-02-20 12:11:59,089 INFO L507 AbstractCegarLoop]: Abstraction has has 280 places, 4391 transitions, 199716 flow [2024-02-20 12:11:59,089 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:11:59,089 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:11:59,089 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:11:59,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-02-20 12:11:59,290 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:59,290 INFO L432 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:11:59,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:11:59,291 INFO L85 PathProgramCache]: Analyzing trace with hash -298598501, now seen corresponding path program 14 times [2024-02-20 12:11:59,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:11:59,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935696429] [2024-02-20 12:11:59,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:11:59,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:11:59,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:11:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:59,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:11:59,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935696429] [2024-02-20 12:11:59,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935696429] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:11:59,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334714580] [2024-02-20 12:11:59,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:11:59,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:11:59,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:11:59,380 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) [2024-02-20 12:11:59,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-20 12:11:59,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:11:59,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:11:59,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:11:59,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:11:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:59,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:11:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:11:59,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334714580] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:11:59,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:11:59,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-02-20 12:11:59,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851613962] [2024-02-20 12:11:59,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:11:59,577 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-20 12:11:59,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:11:59,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-20 12:11:59,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-02-20 12:11:59,589 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:11:59,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 4391 transitions, 199716 flow. Second operand has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:11:59,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:11:59,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:11:59,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:12:24,017 INFO L124 PetriNetUnfolderBase]: 9632/15945 cut-off events. [2024-02-20 12:12:24,017 INFO L125 PetriNetUnfolderBase]: For 40716/40716 co-relation queries the response was YES. [2024-02-20 12:12:24,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365084 conditions, 15945 events. 9632/15945 cut-off events. For 40716/40716 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 110264 event pairs, 105 based on Foata normal form. 72/16017 useless extension candidates. Maximal degree in co-relation 362576. Up to 15818 conditions per place. [2024-02-20 12:12:24,253 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 3431 selfloop transitions, 1287 changer transitions 903/5622 dead transitions. [2024-02-20 12:12:24,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 5622 transitions, 265640 flow [2024-02-20 12:12:24,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-20 12:12:24,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-20 12:12:24,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 197 transitions. [2024-02-20 12:12:24,255 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.45080091533180777 [2024-02-20 12:12:24,255 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 273 predicate places. [2024-02-20 12:12:24,255 INFO L507 AbstractCegarLoop]: Abstraction has has 298 places, 5622 transitions, 265640 flow [2024-02-20 12:12:24,255 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:12:24,255 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:12:24,256 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:12:24,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-02-20 12:12:24,460 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-02-20 12:12:24,460 INFO L432 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:12:24,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:12:24,461 INFO L85 PathProgramCache]: Analyzing trace with hash -978187531, now seen corresponding path program 15 times [2024-02-20 12:12:24,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:12:24,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174827514] [2024-02-20 12:12:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:12:24,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:12:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:12:24,539 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:12:24,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:12:24,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174827514] [2024-02-20 12:12:24,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174827514] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:12:24,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275519458] [2024-02-20 12:12:24,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:12:24,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:12:24,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:12:24,545 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) [2024-02-20 12:12:24,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-02-20 12:12:24,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-02-20 12:12:24,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:12:24,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:12:24,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:12:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:12:24,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:12:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:12:24,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275519458] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:12:24,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:12:24,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-02-20 12:12:24,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141074264] [2024-02-20 12:12:24,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:12:24,784 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-20 12:12:24,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:12:24,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-20 12:12:24,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2024-02-20 12:12:24,800 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:12:24,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 5622 transitions, 265640 flow. Second operand has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:12:24,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:12:24,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:12:24,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:13:06,064 INFO L124 PetriNetUnfolderBase]: 11615/18966 cut-off events. [2024-02-20 12:13:06,065 INFO L125 PetriNetUnfolderBase]: For 47129/47129 co-relation queries the response was YES. [2024-02-20 12:13:06,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453407 conditions, 18966 events. 11615/18966 cut-off events. For 47129/47129 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 131218 event pairs, 127 based on Foata normal form. 24/18990 useless extension candidates. Maximal degree in co-relation 450794. Up to 18839 conditions per place. [2024-02-20 12:13:06,375 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 4437 selfloop transitions, 1309 changer transitions 949/6696 dead transitions. [2024-02-20 12:13:06,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 6696 transitions, 329388 flow [2024-02-20 12:13:06,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-02-20 12:13:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-02-20 12:13:06,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 232 transitions. [2024-02-20 12:13:06,377 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4803312629399586 [2024-02-20 12:13:06,377 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 293 predicate places. [2024-02-20 12:13:06,377 INFO L507 AbstractCegarLoop]: Abstraction has has 318 places, 6696 transitions, 329388 flow [2024-02-20 12:13:06,377 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:13:06,377 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:13:06,377 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:13:06,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-02-20 12:13:06,588 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:13:06,589 INFO L432 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:13:06,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:13:06,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1822647601, now seen corresponding path program 16 times [2024-02-20 12:13:06,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:13:06,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623975038] [2024-02-20 12:13:06,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:13:06,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:13:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:13:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:13:06,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:13:06,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623975038] [2024-02-20 12:13:06,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623975038] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:13:06,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435608966] [2024-02-20 12:13:06,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 12:13:06,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:13:06,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:13:06,674 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) [2024-02-20 12:13:06,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-02-20 12:13:06,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 12:13:06,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:13:06,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:13:06,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:13:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:13:06,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:13:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:13:06,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435608966] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:13:06,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:13:06,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-02-20 12:13:06,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755583850] [2024-02-20 12:13:06,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:13:06,911 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-20 12:13:06,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:13:06,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-20 12:13:06,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-02-20 12:13:06,920 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:13:06,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 6696 transitions, 329388 flow. Second operand has 16 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:13:06,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:13:06,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:13:06,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:14:05,901 INFO L124 PetriNetUnfolderBase]: 12980/21259 cut-off events. [2024-02-20 12:14:05,901 INFO L125 PetriNetUnfolderBase]: For 51841/51841 co-relation queries the response was YES. [2024-02-20 12:14:05,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529151 conditions, 21259 events. 12980/21259 cut-off events. For 51841/51841 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 149571 event pairs, 151 based on Foata normal form. 142/21401 useless extension candidates. Maximal degree in co-relation 526433. Up to 21132 conditions per place. [2024-02-20 12:14:06,354 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 4777 selfloop transitions, 1677 changer transitions 1021/7476 dead transitions. [2024-02-20 12:14:06,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 7476 transitions, 382429 flow [2024-02-20 12:14:06,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-20 12:14:06,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-20 12:14:06,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 230 transitions. [2024-02-20 12:14:06,355 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-02-20 12:14:06,356 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 314 predicate places. [2024-02-20 12:14:06,356 INFO L507 AbstractCegarLoop]: Abstraction has has 339 places, 7476 transitions, 382429 flow [2024-02-20 12:14:06,356 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:14:06,356 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:14:06,356 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:14:06,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-02-20 12:14:06,556 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:14:06,557 INFO L432 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:14:06,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:14:06,558 INFO L85 PathProgramCache]: Analyzing trace with hash -149543097, now seen corresponding path program 17 times [2024-02-20 12:14:06,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:14:06,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705317517] [2024-02-20 12:14:06,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:14:06,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:14:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:14:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:14:06,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:14:06,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705317517] [2024-02-20 12:14:06,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705317517] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:14:06,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678345300] [2024-02-20 12:14:06,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 12:14:06,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:14:06,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:14:06,642 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) [2024-02-20 12:14:06,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-02-20 12:14:06,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 12:14:06,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:14:06,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:14:06,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:14:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:14:06,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:14:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:14:06,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678345300] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:14:06,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:14:06,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-02-20 12:14:06,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444018074] [2024-02-20 12:14:06,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:14:06,861 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-20 12:14:06,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:14:06,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-20 12:14:06,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-02-20 12:14:06,872 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:14:06,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 7476 transitions, 382429 flow. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 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) [2024-02-20 12:14:06,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:14:06,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:14:06,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:15:28,365 INFO L124 PetriNetUnfolderBase]: 15323/25106 cut-off events. [2024-02-20 12:15:28,365 INFO L125 PetriNetUnfolderBase]: For 62146/62146 co-relation queries the response was YES. [2024-02-20 12:15:28,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 649845 conditions, 25106 events. 15323/25106 cut-off events. For 62146/62146 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 180491 event pairs, 129 based on Foata normal form. 242/25348 useless extension candidates. Maximal degree in co-relation 647022. Up to 24979 conditions per place. [2024-02-20 12:15:28,784 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 5533 selfloop transitions, 2189 changer transitions 1188/8911 dead transitions. [2024-02-20 12:15:28,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 8911 transitions, 473699 flow [2024-02-20 12:15:28,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-02-20 12:15:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-02-20 12:15:28,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 369 transitions. [2024-02-20 12:15:28,786 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.44565217391304346 [2024-02-20 12:15:28,786 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 349 predicate places. [2024-02-20 12:15:28,786 INFO L507 AbstractCegarLoop]: Abstraction has has 374 places, 8911 transitions, 473699 flow [2024-02-20 12:15:28,786 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 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) [2024-02-20 12:15:28,786 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:15:28,786 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:15:28,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-02-20 12:15:28,987 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:15:28,987 INFO L432 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:15:28,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:15:28,988 INFO L85 PathProgramCache]: Analyzing trace with hash 991305951, now seen corresponding path program 18 times [2024-02-20 12:15:28,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:15:28,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493081470] [2024-02-20 12:15:28,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:15:28,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:15:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:15:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:15:29,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:15:29,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493081470] [2024-02-20 12:15:29,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493081470] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:15:29,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247281500] [2024-02-20 12:15:29,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 12:15:29,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:15:29,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:15:29,077 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) [2024-02-20 12:15:29,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-02-20 12:15:29,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 12:15:29,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:15:29,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:15:29,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:15:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:15:29,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:15:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:15:29,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247281500] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:15:29,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:15:29,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-02-20 12:15:29,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456185685] [2024-02-20 12:15:29,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:15:29,311 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-20 12:15:29,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:15:29,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-20 12:15:29,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-02-20 12:15:29,320 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:15:29,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 8911 transitions, 473699 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) [2024-02-20 12:15:29,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:15:29,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:15:29,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:17:06,704 INFO L124 PetriNetUnfolderBase]: 15718/25879 cut-off events. [2024-02-20 12:17:06,704 INFO L125 PetriNetUnfolderBase]: For 62668/62668 co-relation queries the response was YES. [2024-02-20 12:17:06,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695070 conditions, 25879 events. 15718/25879 cut-off events. For 62668/62668 co-relation queries the response was YES. Maximal size of possible extension queue 927. Compared 188459 event pairs, 139 based on Foata normal form. 134/26013 useless extension candidates. Maximal degree in co-relation 692142. Up to 25752 conditions per place. [2024-02-20 12:17:07,313 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 5621 selfloop transitions, 2407 changer transitions 1237/9266 dead transitions. [2024-02-20 12:17:07,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 9266 transitions, 511126 flow [2024-02-20 12:17:07,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-02-20 12:17:07,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-02-20 12:17:07,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 390 transitions. [2024-02-20 12:17:07,315 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4462242562929062 [2024-02-20 12:17:07,316 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 386 predicate places. [2024-02-20 12:17:07,316 INFO L507 AbstractCegarLoop]: Abstraction has has 411 places, 9266 transitions, 511126 flow [2024-02-20 12:17:07,316 INFO L508 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) [2024-02-20 12:17:07,316 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:17:07,316 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:17:07,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-02-20 12:17:07,520 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-02-20 12:17:07,520 INFO L432 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:17:07,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:17:07,521 INFO L85 PathProgramCache]: Analyzing trace with hash 811961785, now seen corresponding path program 19 times [2024-02-20 12:17:07,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:17:07,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415849595] [2024-02-20 12:17:07,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:17:07,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:17:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:17:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:17:07,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:17:07,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415849595] [2024-02-20 12:17:07,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415849595] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:17:07,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197251476] [2024-02-20 12:17:07,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 12:17:07,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:17:07,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:17:07,596 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:17:07,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-02-20 12:17:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:17:07,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:17:07,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:17:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:17:07,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:17:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:17:07,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197251476] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:17:07,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:17:07,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-02-20 12:17:07,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491036474] [2024-02-20 12:17:07,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:17:07,790 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-20 12:17:07,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:17:07,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-20 12:17:07,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-02-20 12:17:07,803 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:17:07,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 9266 transitions, 511126 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) [2024-02-20 12:17:07,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:17:07,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:17:07,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:19:19,355 INFO L124 PetriNetUnfolderBase]: 18554/30331 cut-off events. [2024-02-20 12:19:19,355 INFO L125 PetriNetUnfolderBase]: For 73846/73846 co-relation queries the response was YES. [2024-02-20 12:19:19,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 845512 conditions, 30331 events. 18554/30331 cut-off events. For 73846/73846 co-relation queries the response was YES. Maximal size of possible extension queue 997. Compared 223033 event pairs, 155 based on Foata normal form. 58/30389 useless extension candidates. Maximal degree in co-relation 842479. Up to 30204 conditions per place. [2024-02-20 12:19:19,934 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 7050 selfloop transitions, 2356 changer transitions 1342/10749 dead transitions. [2024-02-20 12:19:19,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 10749 transitions, 614662 flow [2024-02-20 12:19:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-20 12:19:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-20 12:19:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 234 transitions. [2024-02-20 12:19:19,935 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.44234404536862004 [2024-02-20 12:19:19,936 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 408 predicate places. [2024-02-20 12:19:19,936 INFO L507 AbstractCegarLoop]: Abstraction has has 433 places, 10749 transitions, 614662 flow [2024-02-20 12:19:19,936 INFO L508 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) [2024-02-20 12:19:19,936 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:19:19,936 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:19:19,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-02-20 12:19:20,142 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-02-20 12:19:20,142 INFO L432 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:19:20,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:19:20,143 INFO L85 PathProgramCache]: Analyzing trace with hash 437119345, now seen corresponding path program 20 times [2024-02-20 12:19:20,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:19:20,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776638535] [2024-02-20 12:19:20,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:19:20,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:19:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:19:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:19:20,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:19:20,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776638535] [2024-02-20 12:19:20,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776638535] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:19:20,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244243324] [2024-02-20 12:19:20,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 12:19:20,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:19:20,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:19:20,258 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:19:20,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-02-20 12:19:20,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 12:19:20,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:19:20,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:19:20,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:19:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:19:20,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:19:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:19:20,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244243324] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:19:20,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:19:20,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2024-02-20 12:19:20,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365316276] [2024-02-20 12:19:20,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:19:20,513 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-20 12:19:20,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:19:20,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-20 12:19:20,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-02-20 12:19:20,519 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:19:20,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 10749 transitions, 614662 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) [2024-02-20 12:19:20,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:19:20,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:19:20,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:22:12,988 INFO L124 PetriNetUnfolderBase]: 19892/32739 cut-off events. [2024-02-20 12:22:12,988 INFO L125 PetriNetUnfolderBase]: For 78571/78571 co-relation queries the response was YES. [2024-02-20 12:22:13,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945217 conditions, 32739 events. 19892/32739 cut-off events. For 78571/78571 co-relation queries the response was YES. Maximal size of possible extension queue 1066. Compared 245728 event pairs, 185 based on Foata normal form. 196/32935 useless extension candidates. Maximal degree in co-relation 942079. Up to 32612 conditions per place. [2024-02-20 12:22:13,848 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 7386 selfloop transitions, 2810 changer transitions 1609/11806 dead transitions. [2024-02-20 12:22:13,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 11806 transitions, 698825 flow [2024-02-20 12:22:13,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-02-20 12:22:13,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-02-20 12:22:13,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 362 transitions. [2024-02-20 12:22:13,850 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.42538190364277323 [2024-02-20 12:22:13,851 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 444 predicate places. [2024-02-20 12:22:13,851 INFO L507 AbstractCegarLoop]: Abstraction has has 469 places, 11806 transitions, 698825 flow [2024-02-20 12:22:13,851 INFO L508 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) [2024-02-20 12:22:13,851 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:22:13,851 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:22:13,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-02-20 12:22:14,056 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-02-20 12:22:14,057 INFO L432 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 12:22:14,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:22:14,057 INFO L85 PathProgramCache]: Analyzing trace with hash -545087439, now seen corresponding path program 21 times [2024-02-20 12:22:14,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:22:14,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664892100] [2024-02-20 12:22:14,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:22:14,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:22:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:22:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:22:14,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:22:14,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664892100] [2024-02-20 12:22:14,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664892100] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 12:22:14,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908292296] [2024-02-20 12:22:14,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 12:22:14,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:22:14,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:22:14,144 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:22:14,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-02-20 12:22:14,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-20 12:22:14,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 12:22:14,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 12:22:14,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:22:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:22:14,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:22:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:22:14,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908292296] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:22:14,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 12:22:14,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2024-02-20 12:22:14,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487842268] [2024-02-20 12:22:14,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 12:22:14,417 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-20 12:22:14,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:22:14,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-20 12:22:14,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2024-02-20 12:22:14,434 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 12:22:14,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 11806 transitions, 698825 flow. Second operand has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 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) [2024-02-20 12:22:14,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:22:14,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 12:22:14,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15