./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 273a578a 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-queue-add-3.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 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-273a578-m [2024-02-19 15:16:25,993 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-19 15:16:26,072 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-19 15:16:26,076 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-19 15:16:26,077 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-19 15:16:26,103 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-19 15:16:26,103 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-19 15:16:26,103 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-19 15:16:26,104 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-19 15:16:26,107 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-19 15:16:26,107 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-19 15:16:26,108 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-19 15:16:26,108 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-19 15:16:26,109 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-19 15:16:26,109 INFO L153 SettingsManager]: * Use SBE=true [2024-02-19 15:16:26,109 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-19 15:16:26,110 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-19 15:16:26,110 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-19 15:16:26,110 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-19 15:16:26,110 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-19 15:16:26,110 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-19 15:16:26,111 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-19 15:16:26,111 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-19 15:16:26,112 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-19 15:16:26,112 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-19 15:16:26,112 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-19 15:16:26,112 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-19 15:16:26,112 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-19 15:16:26,113 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-19 15:16:26,113 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-19 15:16:26,114 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-19 15:16:26,114 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-19 15:16:26,114 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 15:16:26,115 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-19 15:16:26,115 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-19 15:16:26,115 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-19 15:16:26,116 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-19 15:16:26,116 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-19 15:16:26,116 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-19 15:16:26,116 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-19 15:16:26,116 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-19 15:16:26,117 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-19 15:16:26,117 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-19 15:16:26,117 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-19 15:16:26,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-19 15:16:26,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-19 15:16:26,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-19 15:16:26,353 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-19 15:16:26,354 INFO L274 PluginConnector]: CDTParser initialized [2024-02-19 15:16:26,355 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2024-02-19 15:16:27,395 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-19 15:16:27,596 INFO L384 CDTParser]: Found 1 translation units. [2024-02-19 15:16:27,597 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2024-02-19 15:16:27,603 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25ddebefb/7a7e019dbd644466befbb1baaf1c30df/FLAGee75be19e [2024-02-19 15:16:27,614 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25ddebefb/7a7e019dbd644466befbb1baaf1c30df [2024-02-19 15:16:27,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-19 15:16:27,617 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-19 15:16:27,617 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-19 15:16:27,618 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-19 15:16:27,621 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-19 15:16:27,622 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 03:16:27" (1/1) ... [2024-02-19 15:16:27,622 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53e1a65f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:27, skipping insertion in model container [2024-02-19 15:16:27,623 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 03:16:27" (1/1) ... [2024-02-19 15:16:27,641 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-19 15:16:27,767 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-queue-add-3.wvr.c[3412,3425] [2024-02-19 15:16:27,774 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 15:16:27,783 INFO L202 MainTranslator]: Completed pre-run [2024-02-19 15:16:27,799 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-queue-add-3.wvr.c[3412,3425] [2024-02-19 15:16:27,802 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 15:16:27,835 INFO L206 MainTranslator]: Completed translation [2024-02-19 15:16:27,837 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:27 WrapperNode [2024-02-19 15:16:27,837 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-19 15:16:27,838 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-19 15:16:27,839 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-19 15:16:27,839 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-19 15:16:27,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:27" (1/1) ... [2024-02-19 15:16:27,861 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:27" (1/1) ... [2024-02-19 15:16:27,894 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 254 [2024-02-19 15:16:27,895 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-19 15:16:27,896 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-19 15:16:27,896 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-19 15:16:27,896 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-19 15:16:27,904 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:27" (1/1) ... [2024-02-19 15:16:27,904 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:27" (1/1) ... [2024-02-19 15:16:27,917 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:27" (1/1) ... [2024-02-19 15:16:27,936 INFO L175 MemorySlicer]: Split 15 memory accesses to 5 slices as follows [2, 7, 2, 2, 2]. 47 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 5 writes are split as follows [0, 2, 1, 1, 1]. [2024-02-19 15:16:27,943 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:27" (1/1) ... [2024-02-19 15:16:27,943 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:27" (1/1) ... [2024-02-19 15:16:27,949 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:27" (1/1) ... [2024-02-19 15:16:27,958 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:27" (1/1) ... [2024-02-19 15:16:27,963 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:27" (1/1) ... [2024-02-19 15:16:27,965 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:27" (1/1) ... [2024-02-19 15:16:27,967 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-19 15:16:27,970 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-19 15:16:27,970 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-19 15:16:27,970 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-19 15:16:27,971 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:27" (1/1) ... [2024-02-19 15:16:27,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 15:16:27,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:16:27,996 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) [2024-02-19 15:16:28,034 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 [2024-02-19 15:16:28,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-19 15:16:28,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-19 15:16:28,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-19 15:16:28,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-19 15:16:28,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-19 15:16:28,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-19 15:16:28,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-19 15:16:28,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-19 15:16:28,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-19 15:16:28,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-19 15:16:28,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-19 15:16:28,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-19 15:16:28,064 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-19 15:16:28,064 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-19 15:16:28,064 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-19 15:16:28,064 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-19 15:16:28,065 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-19 15:16:28,065 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-19 15:16:28,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-19 15:16:28,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-19 15:16:28,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-19 15:16:28,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-19 15:16:28,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-19 15:16:28,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-19 15:16:28,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-19 15:16:28,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-02-19 15:16:28,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-19 15:16:28,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-19 15:16:28,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-19 15:16:28,069 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-19 15:16:28,185 INFO L244 CfgBuilder]: Building ICFG [2024-02-19 15:16:28,187 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-19 15:16:28,499 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-19 15:16:28,500 INFO L293 CfgBuilder]: Performing block encoding [2024-02-19 15:16:28,793 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-19 15:16:28,793 INFO L320 CfgBuilder]: Removed 5 assume(true) statements. [2024-02-19 15:16:28,794 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 03:16:28 BoogieIcfgContainer [2024-02-19 15:16:28,794 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-19 15:16:28,795 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-19 15:16:28,795 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-19 15:16:28,798 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-19 15:16:28,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 03:16:27" (1/3) ... [2024-02-19 15:16:28,799 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bccbca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 03:16:28, skipping insertion in model container [2024-02-19 15:16:28,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 03:16:27" (2/3) ... [2024-02-19 15:16:28,801 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bccbca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 03:16:28, skipping insertion in model container [2024-02-19 15:16:28,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 03:16:28" (3/3) ... [2024-02-19 15:16:28,802 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2024-02-19 15:16:28,815 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-19 15:16:28,815 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-19 15:16:28,816 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-19 15:16:28,850 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-02-19 15:16:28,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 46 transitions, 113 flow [2024-02-19 15:16:28,923 INFO L124 PetriNetUnfolderBase]: 7/43 cut-off events. [2024-02-19 15:16:28,923 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-19 15:16:28,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 43 events. 7/43 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-02-19 15:16:28,928 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 46 transitions, 113 flow [2024-02-19 15:16:28,931 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 42 transitions, 102 flow [2024-02-19 15:16:28,941 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 15:16:28,947 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;@eb401ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 15:16:28,948 INFO L370 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-02-19 15:16:28,963 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 15:16:28,963 INFO L124 PetriNetUnfolderBase]: 7/41 cut-off events. [2024-02-19 15:16:28,964 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-19 15:16:28,964 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:28,964 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, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:28,965 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:16:28,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:28,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1878040280, now seen corresponding path program 1 times [2024-02-19 15:16:28,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:28,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677761432] [2024-02-19 15:16:28,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:28,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:29,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:29,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677761432] [2024-02-19 15:16:29,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677761432] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 15:16:29,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 15:16:29,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 15:16:29,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789022693] [2024-02-19 15:16:29,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 15:16:29,212 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-19 15:16:29,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:29,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-19 15:16:29,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-19 15:16:29,238 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-19 15:16:29,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 102 flow. Second operand has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 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) [2024-02-19 15:16:29,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:29,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-19 15:16:29,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:29,416 INFO L124 PetriNetUnfolderBase]: 507/983 cut-off events. [2024-02-19 15:16:29,416 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-02-19 15:16:29,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1800 conditions, 983 events. 507/983 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5579 event pairs, 376 based on Foata normal form. 153/1008 useless extension candidates. Maximal degree in co-relation 1612. Up to 735 conditions per place. [2024-02-19 15:16:29,426 INFO L140 encePairwiseOnDemand]: 44/46 looper letters, 27 selfloop transitions, 0 changer transitions 0/40 dead transitions. [2024-02-19 15:16:29,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 152 flow [2024-02-19 15:16:29,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-19 15:16:29,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-19 15:16:29,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 61 transitions. [2024-02-19 15:16:29,437 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-02-19 15:16:29,440 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 1 predicate places. [2024-02-19 15:16:29,441 INFO L507 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 152 flow [2024-02-19 15:16:29,441 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 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) [2024-02-19 15:16:29,441 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:29,441 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:29,441 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-19 15:16:29,442 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:16:29,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:29,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1306033586, now seen corresponding path program 1 times [2024-02-19 15:16:29,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:29,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602175599] [2024-02-19 15:16:29,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:29,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:29,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:29,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602175599] [2024-02-19 15:16:29,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602175599] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 15:16:29,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 15:16:29,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 15:16:29,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197181070] [2024-02-19 15:16:29,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 15:16:29,578 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 15:16:29,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:29,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 15:16:29,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 15:16:29,579 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-19 15:16:29,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2024-02-19 15:16:29,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:29,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-19 15:16:29,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:29,700 INFO L124 PetriNetUnfolderBase]: 431/842 cut-off events. [2024-02-19 15:16:29,701 INFO L125 PetriNetUnfolderBase]: For 186/288 co-relation queries the response was YES. [2024-02-19 15:16:29,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2232 conditions, 842 events. 431/842 cut-off events. For 186/288 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4547 event pairs, 103 based on Foata normal form. 12/789 useless extension candidates. Maximal degree in co-relation 1961. Up to 655 conditions per place. [2024-02-19 15:16:29,716 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 34 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2024-02-19 15:16:29,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 50 transitions, 272 flow [2024-02-19 15:16:29,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-19 15:16:29,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-19 15:16:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-02-19 15:16:29,720 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6231884057971014 [2024-02-19 15:16:29,721 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-02-19 15:16:29,721 INFO L507 AbstractCegarLoop]: Abstraction has has 48 places, 50 transitions, 272 flow [2024-02-19 15:16:29,722 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2024-02-19 15:16:29,722 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:29,722 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:29,723 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-19 15:16:29,723 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:16:29,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:29,726 INFO L85 PathProgramCache]: Analyzing trace with hash -2129357912, now seen corresponding path program 2 times [2024-02-19 15:16:29,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:29,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046464775] [2024-02-19 15:16:29,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:29,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:29,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:29,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046464775] [2024-02-19 15:16:29,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046464775] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 15:16:29,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 15:16:29,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 15:16:29,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424766471] [2024-02-19 15:16:29,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 15:16:29,851 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 15:16:29,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:29,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 15:16:29,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 15:16:29,853 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-19 15:16:29,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 50 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2024-02-19 15:16:29,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:29,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-19 15:16:29,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:29,985 INFO L124 PetriNetUnfolderBase]: 430/895 cut-off events. [2024-02-19 15:16:29,985 INFO L125 PetriNetUnfolderBase]: For 486/574 co-relation queries the response was YES. [2024-02-19 15:16:29,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2922 conditions, 895 events. 430/895 cut-off events. For 486/574 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4827 event pairs, 71 based on Foata normal form. 24/853 useless extension candidates. Maximal degree in co-relation 2537. Up to 646 conditions per place. [2024-02-19 15:16:29,991 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 45 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-02-19 15:16:29,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 60 transitions, 432 flow [2024-02-19 15:16:29,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-19 15:16:29,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-19 15:16:29,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-02-19 15:16:29,994 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-02-19 15:16:29,995 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2024-02-19 15:16:29,995 INFO L507 AbstractCegarLoop]: Abstraction has has 50 places, 60 transitions, 432 flow [2024-02-19 15:16:29,996 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2024-02-19 15:16:29,996 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:29,996 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:29,996 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-19 15:16:29,996 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:16:29,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:29,997 INFO L85 PathProgramCache]: Analyzing trace with hash 2008293032, now seen corresponding path program 3 times [2024-02-19 15:16:29,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:29,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937410453] [2024-02-19 15:16:29,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:29,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:16:30,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:30,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937410453] [2024-02-19 15:16:30,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937410453] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 15:16:30,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 15:16:30,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-19 15:16:30,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116822348] [2024-02-19 15:16:30,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 15:16:30,173 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 15:16:30,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:30,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 15:16:30,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-19 15:16:30,176 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-19 15:16:30,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 60 transitions, 432 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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) [2024-02-19 15:16:30,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:30,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-19 15:16:30,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:30,301 INFO L124 PetriNetUnfolderBase]: 436/926 cut-off events. [2024-02-19 15:16:30,302 INFO L125 PetriNetUnfolderBase]: For 881/945 co-relation queries the response was YES. [2024-02-19 15:16:30,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3693 conditions, 926 events. 436/926 cut-off events. For 881/945 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4978 event pairs, 76 based on Foata normal form. 10/869 useless extension candidates. Maximal degree in co-relation 3100. Up to 667 conditions per place. [2024-02-19 15:16:30,308 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 46 selfloop transitions, 2 changer transitions 10/71 dead transitions. [2024-02-19 15:16:30,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 71 transitions, 645 flow [2024-02-19 15:16:30,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 15:16:30,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 15:16:30,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-02-19 15:16:30,312 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-02-19 15:16:30,313 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2024-02-19 15:16:30,313 INFO L507 AbstractCegarLoop]: Abstraction has has 53 places, 71 transitions, 645 flow [2024-02-19 15:16:30,314 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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) [2024-02-19 15:16:30,314 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:30,314 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:30,314 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-19 15:16:30,314 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:16:30,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:30,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1411983472, now seen corresponding path program 1 times [2024-02-19 15:16:30,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:30,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467435159] [2024-02-19 15:16:30,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:30,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:30,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:16:30,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:30,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467435159] [2024-02-19 15:16:30,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467435159] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 15:16:30,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 15:16:30,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-19 15:16:30,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899162283] [2024-02-19 15:16:30,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 15:16:30,440 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 15:16:30,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:30,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 15:16:30,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-19 15:16:30,443 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-19 15:16:30,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 71 transitions, 645 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 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) [2024-02-19 15:16:30,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:30,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-19 15:16:30,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:30,573 INFO L124 PetriNetUnfolderBase]: 520/1119 cut-off events. [2024-02-19 15:16:30,573 INFO L125 PetriNetUnfolderBase]: For 1540/1628 co-relation queries the response was YES. [2024-02-19 15:16:30,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5435 conditions, 1119 events. 520/1119 cut-off events. For 1540/1628 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6291 event pairs, 100 based on Foata normal form. 22/1071 useless extension candidates. Maximal degree in co-relation 3663. Up to 833 conditions per place. [2024-02-19 15:16:30,579 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 47 selfloop transitions, 2 changer transitions 42/104 dead transitions. [2024-02-19 15:16:30,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 104 transitions, 1184 flow [2024-02-19 15:16:30,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 15:16:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 15:16:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2024-02-19 15:16:30,581 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-02-19 15:16:30,581 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2024-02-19 15:16:30,581 INFO L507 AbstractCegarLoop]: Abstraction has has 56 places, 104 transitions, 1184 flow [2024-02-19 15:16:30,582 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 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) [2024-02-19 15:16:30,582 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:30,582 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:30,582 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-19 15:16:30,582 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:16:30,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:30,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1495398445, now seen corresponding path program 1 times [2024-02-19 15:16:30,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:30,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690823125] [2024-02-19 15:16:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:30,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 15:16:30,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:30,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690823125] [2024-02-19 15:16:30,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690823125] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 15:16:30,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 15:16:30,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-19 15:16:30,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848685805] [2024-02-19 15:16:30,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 15:16:30,780 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-19 15:16:30,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:30,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-19 15:16:30,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-02-19 15:16:30,793 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-02-19 15:16:30,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 104 transitions, 1184 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 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) [2024-02-19 15:16:30,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:30,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-02-19 15:16:30,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:31,121 INFO L124 PetriNetUnfolderBase]: 1469/2703 cut-off events. [2024-02-19 15:16:31,122 INFO L125 PetriNetUnfolderBase]: For 9732/10132 co-relation queries the response was YES. [2024-02-19 15:16:31,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14899 conditions, 2703 events. 1469/2703 cut-off events. For 9732/10132 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16564 event pairs, 154 based on Foata normal form. 1/2602 useless extension candidates. Maximal degree in co-relation 11386. Up to 1927 conditions per place. [2024-02-19 15:16:31,140 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 120 selfloop transitions, 10 changer transitions 100/239 dead transitions. [2024-02-19 15:16:31,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 239 transitions, 3315 flow [2024-02-19 15:16:31,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-19 15:16:31,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-19 15:16:31,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-02-19 15:16:31,141 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.532608695652174 [2024-02-19 15:16:31,142 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-02-19 15:16:31,142 INFO L507 AbstractCegarLoop]: Abstraction has has 63 places, 239 transitions, 3315 flow [2024-02-19 15:16:31,142 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 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) [2024-02-19 15:16:31,142 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:31,142 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:31,143 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-19 15:16:31,143 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:16:31,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:31,143 INFO L85 PathProgramCache]: Analyzing trace with hash 335493507, now seen corresponding path program 1 times [2024-02-19 15:16:31,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:31,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658078817] [2024-02-19 15:16:31,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:31,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:31,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:16:31,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:31,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658078817] [2024-02-19 15:16:31,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658078817] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:16:31,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248479928] [2024-02-19 15:16:31,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:31,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:31,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:16:31,282 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) [2024-02-19 15:16:31,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-19 15:16:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:31,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-19 15:16:31,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:16:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:16:31,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:16:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:16:31,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248479928] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:16:31,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:16:31,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-02-19 15:16:31,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906995192] [2024-02-19 15:16:31,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:16:31,588 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-19 15:16:31,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:31,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-19 15:16:31,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-02-19 15:16:31,590 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-19 15:16:31,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 239 transitions, 3315 flow. Second operand has 12 states, 12 states have (on average 19.583333333333332) internal successors, (235), 12 states have internal predecessors, (235), 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) [2024-02-19 15:16:31,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:31,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-19 15:16:31,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:32,206 INFO L124 PetriNetUnfolderBase]: 2432/4539 cut-off events. [2024-02-19 15:16:32,207 INFO L125 PetriNetUnfolderBase]: For 25016/25784 co-relation queries the response was YES. [2024-02-19 15:16:32,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28066 conditions, 4539 events. 2432/4539 cut-off events. For 25016/25784 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 31304 event pairs, 230 based on Foata normal form. 152/4527 useless extension candidates. Maximal degree in co-relation 12868. Up to 3211 conditions per place. [2024-02-19 15:16:32,238 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 184 selfloop transitions, 5 changer transitions 191/398 dead transitions. [2024-02-19 15:16:32,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 398 transitions, 6422 flow [2024-02-19 15:16:32,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-19 15:16:32,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-19 15:16:32,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-02-19 15:16:32,240 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5314009661835749 [2024-02-19 15:16:32,240 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2024-02-19 15:16:32,240 INFO L507 AbstractCegarLoop]: Abstraction has has 71 places, 398 transitions, 6422 flow [2024-02-19 15:16:32,241 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.583333333333332) internal successors, (235), 12 states have internal predecessors, (235), 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) [2024-02-19 15:16:32,241 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:32,241 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:32,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-19 15:16:32,457 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:32,458 INFO L432 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:16:32,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:32,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1397501541, now seen corresponding path program 2 times [2024-02-19 15:16:32,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:32,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968849837] [2024-02-19 15:16:32,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:32,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:32,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:16:32,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:32,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968849837] [2024-02-19 15:16:32,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968849837] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:16:32,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242782775] [2024-02-19 15:16:32,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 15:16:32,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:32,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:16:32,965 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) [2024-02-19 15:16:32,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-19 15:16:33,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 15:16:33,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:16:33,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-19 15:16:33,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:16:33,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 15:16:33,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:16:33,215 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-19 15:16:33,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-02-19 15:16:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 15:16:33,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242782775] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:16:33,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:16:33,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 13 [2024-02-19 15:16:33,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568403018] [2024-02-19 15:16:33,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:16:33,237 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-19 15:16:33,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:33,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-19 15:16:33,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-02-19 15:16:33,264 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-02-19 15:16:33,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 398 transitions, 6422 flow. Second operand has 14 states, 14 states have (on average 17.285714285714285) internal successors, (242), 14 states have internal predecessors, (242), 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) [2024-02-19 15:16:33,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:33,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-02-19 15:16:33,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:34,767 INFO L124 PetriNetUnfolderBase]: 5606/9741 cut-off events. [2024-02-19 15:16:34,769 INFO L125 PetriNetUnfolderBase]: For 80764/80794 co-relation queries the response was YES. [2024-02-19 15:16:34,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65024 conditions, 9741 events. 5606/9741 cut-off events. For 80764/80794 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 66786 event pairs, 597 based on Foata normal form. 13/9499 useless extension candidates. Maximal degree in co-relation 26564. Up to 6539 conditions per place. [2024-02-19 15:16:34,852 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 370 selfloop transitions, 36 changer transitions 294/716 dead transitions. [2024-02-19 15:16:34,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 716 transitions, 13021 flow [2024-02-19 15:16:34,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-19 15:16:34,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-19 15:16:34,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 316 transitions. [2024-02-19 15:16:34,854 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4906832298136646 [2024-02-19 15:16:34,856 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 39 predicate places. [2024-02-19 15:16:34,856 INFO L507 AbstractCegarLoop]: Abstraction has has 84 places, 716 transitions, 13021 flow [2024-02-19 15:16:34,856 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.285714285714285) internal successors, (242), 14 states have internal predecessors, (242), 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) [2024-02-19 15:16:34,858 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:34,858 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:34,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-19 15:16:35,071 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,SelfDestructingSolverStorable7 [2024-02-19 15:16:35,071 INFO L432 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:16:35,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:35,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1961141119, now seen corresponding path program 1 times [2024-02-19 15:16:35,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:35,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328365964] [2024-02-19 15:16:35,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:35,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 15:16:35,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:35,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328365964] [2024-02-19 15:16:35,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328365964] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 15:16:35,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 15:16:35,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-19 15:16:35,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342300252] [2024-02-19 15:16:35,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 15:16:35,219 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 15:16:35,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:35,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 15:16:35,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-19 15:16:35,220 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-19 15:16:35,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 716 transitions, 13021 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 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) [2024-02-19 15:16:35,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:35,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-19 15:16:35,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:37,385 INFO L124 PetriNetUnfolderBase]: 9297/15916 cut-off events. [2024-02-19 15:16:37,385 INFO L125 PetriNetUnfolderBase]: For 201929/202027 co-relation queries the response was YES. [2024-02-19 15:16:37,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118528 conditions, 15916 events. 9297/15916 cut-off events. For 201929/202027 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 114294 event pairs, 906 based on Foata normal form. 266/15442 useless extension candidates. Maximal degree in co-relation 54336. Up to 10914 conditions per place. [2024-02-19 15:16:37,537 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 656 selfloop transitions, 45 changer transitions 369/1095 dead transitions. [2024-02-19 15:16:37,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 1095 transitions, 22193 flow [2024-02-19 15:16:37,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 15:16:37,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 15:16:37,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-02-19 15:16:37,539 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7010869565217391 [2024-02-19 15:16:37,540 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 42 predicate places. [2024-02-19 15:16:37,541 INFO L507 AbstractCegarLoop]: Abstraction has has 87 places, 1095 transitions, 22193 flow [2024-02-19 15:16:37,542 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 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) [2024-02-19 15:16:37,542 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:37,542 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:37,542 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-19 15:16:37,543 INFO L432 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:16:37,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:37,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1254455464, now seen corresponding path program 1 times [2024-02-19 15:16:37,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:37,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962321220] [2024-02-19 15:16:37,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:37,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 15:16:37,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:37,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962321220] [2024-02-19 15:16:37,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962321220] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:16:37,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36299594] [2024-02-19 15:16:37,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:37,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:37,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:16:37,826 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) [2024-02-19 15:16:37,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-19 15:16:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:37,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-19 15:16:37,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:16:38,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 15:16:38,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:16:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 15:16:38,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36299594] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:16:38,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:16:38,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-02-19 15:16:38,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572176300] [2024-02-19 15:16:38,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:16:38,094 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-19 15:16:38,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:38,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-19 15:16:38,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-02-19 15:16:38,096 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-19 15:16:38,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 1095 transitions, 22193 flow. Second operand has 12 states, 12 states have (on average 19.416666666666668) internal successors, (233), 12 states have internal predecessors, (233), 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) [2024-02-19 15:16:38,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:38,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-19 15:16:38,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:41,456 INFO L124 PetriNetUnfolderBase]: 11907/20797 cut-off events. [2024-02-19 15:16:41,456 INFO L125 PetriNetUnfolderBase]: For 304236/304322 co-relation queries the response was YES. [2024-02-19 15:16:41,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167421 conditions, 20797 events. 11907/20797 cut-off events. For 304236/304322 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 158799 event pairs, 1200 based on Foata normal form. 212/20206 useless extension candidates. Maximal degree in co-relation 59403. Up to 14071 conditions per place. [2024-02-19 15:16:41,676 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 695 selfloop transitions, 9 changer transitions 832/1561 dead transitions. [2024-02-19 15:16:41,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 1561 transitions, 34900 flow [2024-02-19 15:16:41,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-19 15:16:41,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-19 15:16:41,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-02-19 15:16:41,678 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5900621118012422 [2024-02-19 15:16:41,679 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 48 predicate places. [2024-02-19 15:16:41,679 INFO L507 AbstractCegarLoop]: Abstraction has has 93 places, 1561 transitions, 34900 flow [2024-02-19 15:16:41,679 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.416666666666668) internal successors, (233), 12 states have internal predecessors, (233), 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) [2024-02-19 15:16:41,679 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:41,679 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:41,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-02-19 15:16:41,890 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 [2024-02-19 15:16:41,890 INFO L432 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:16:41,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:41,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1956066955, now seen corresponding path program 2 times [2024-02-19 15:16:41,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:41,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877939036] [2024-02-19 15:16:41,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:41,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 15:16:42,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:42,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877939036] [2024-02-19 15:16:42,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877939036] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:16:42,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35773377] [2024-02-19 15:16:42,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 15:16:42,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:42,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:16:42,376 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) [2024-02-19 15:16:42,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-19 15:16:42,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 15:16:42,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:16:42,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-19 15:16:42,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:16:42,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2024-02-19 15:16:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-19 15:16:42,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:16:42,597 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-19 15:16:42,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-02-19 15:16:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-19 15:16:42,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35773377] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:16:42,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:16:42,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2024-02-19 15:16:42,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066503788] [2024-02-19 15:16:42,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:16:42,626 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-19 15:16:42,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:42,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-19 15:16:42,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-02-19 15:16:42,683 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-02-19 15:16:42,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 1561 transitions, 34900 flow. Second operand has 15 states, 15 states have (on average 14.333333333333334) internal successors, (215), 15 states have internal predecessors, (215), 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) [2024-02-19 15:16:42,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:42,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-02-19 15:16:42,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:16:51,505 INFO L124 PetriNetUnfolderBase]: 20272/34050 cut-off events. [2024-02-19 15:16:51,505 INFO L125 PetriNetUnfolderBase]: For 534759/534891 co-relation queries the response was YES. [2024-02-19 15:16:51,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292589 conditions, 34050 events. 20272/34050 cut-off events. For 534759/534891 co-relation queries the response was YES. Maximal size of possible extension queue 921. Compared 263240 event pairs, 1183 based on Foata normal form. 603/33493 useless extension candidates. Maximal degree in co-relation 94257. Up to 21939 conditions per place. [2024-02-19 15:16:51,829 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 1645 selfloop transitions, 126 changer transitions 1507/3288 dead transitions. [2024-02-19 15:16:51,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 3288 transitions, 79360 flow [2024-02-19 15:16:51,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-19 15:16:51,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-19 15:16:51,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 445 transitions. [2024-02-19 15:16:51,831 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.483695652173913 [2024-02-19 15:16:51,832 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 67 predicate places. [2024-02-19 15:16:51,832 INFO L507 AbstractCegarLoop]: Abstraction has has 112 places, 3288 transitions, 79360 flow [2024-02-19 15:16:51,832 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.333333333333334) internal successors, (215), 15 states have internal predecessors, (215), 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) [2024-02-19 15:16:51,832 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:16:51,833 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:16:51,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-19 15:16:52,048 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 [2024-02-19 15:16:52,049 INFO L432 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:16:52,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:16:52,050 INFO L85 PathProgramCache]: Analyzing trace with hash -869039395, now seen corresponding path program 3 times [2024-02-19 15:16:52,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:16:52,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566897933] [2024-02-19 15:16:52,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:16:52,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:16:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:16:52,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 15:16:52,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:16:52,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566897933] [2024-02-19 15:16:52,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566897933] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:16:52,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802268378] [2024-02-19 15:16:52,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 15:16:52,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:16:52,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:16:52,465 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) [2024-02-19 15:16:52,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-19 15:16:52,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 15:16:52,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:16:52,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 23 conjunts are in the unsatisfiable core [2024-02-19 15:16:52,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:16:52,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2024-02-19 15:16:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 15:16:52,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:16:52,921 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-19 15:16:52,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-02-19 15:16:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 15:16:53,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802268378] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:16:53,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:16:53,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 27 [2024-02-19 15:16:53,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740530523] [2024-02-19 15:16:53,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:16:53,168 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-02-19 15:16:53,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:16:53,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-02-19 15:16:53,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2024-02-19 15:16:53,257 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-02-19 15:16:53,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 3288 transitions, 79360 flow. Second operand has 28 states, 28 states have (on average 13.321428571428571) internal successors, (373), 28 states have internal predecessors, (373), 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) [2024-02-19 15:16:53,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:16:53,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-02-19 15:16:53,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:17:24,938 INFO L124 PetriNetUnfolderBase]: 38013/63760 cut-off events. [2024-02-19 15:17:24,939 INFO L125 PetriNetUnfolderBase]: For 1151552/1151772 co-relation queries the response was YES. [2024-02-19 15:17:25,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607505 conditions, 63760 events. 38013/63760 cut-off events. For 1151552/1151772 co-relation queries the response was YES. Maximal size of possible extension queue 1947. Compared 536046 event pairs, 1109 based on Foata normal form. 534/61841 useless extension candidates. Maximal degree in co-relation 186530. Up to 41735 conditions per place. [2024-02-19 15:17:25,595 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 4071 selfloop transitions, 387 changer transitions 2582/7050 dead transitions. [2024-02-19 15:17:25,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 7050 transitions, 183688 flow [2024-02-19 15:17:25,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-02-19 15:17:25,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-02-19 15:17:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 709 transitions. [2024-02-19 15:17:25,598 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.513768115942029 [2024-02-19 15:17:25,598 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-02-19 15:17:25,598 INFO L507 AbstractCegarLoop]: Abstraction has has 141 places, 7050 transitions, 183688 flow [2024-02-19 15:17:25,599 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 13.321428571428571) internal successors, (373), 28 states have internal predecessors, (373), 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) [2024-02-19 15:17:25,599 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:17:25,599 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:17:25,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-19 15:17:25,809 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 [2024-02-19 15:17:25,811 INFO L432 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:17:25,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:17:25,811 INFO L85 PathProgramCache]: Analyzing trace with hash -551016803, now seen corresponding path program 4 times [2024-02-19 15:17:25,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:17:25,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315004318] [2024-02-19 15:17:25,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:17:25,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:17:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:17:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 15:17:26,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:17:26,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315004318] [2024-02-19 15:17:26,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315004318] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:17:26,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253506232] [2024-02-19 15:17:26,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 15:17:26,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:17:26,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:17:26,258 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) [2024-02-19 15:17:26,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-19 15:17:26,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 15:17:26,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:17:26,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-19 15:17:26,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:17:26,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2024-02-19 15:17:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 15:17:26,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:17:26,976 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-19 15:17:26,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-02-19 15:17:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 15:17:27,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253506232] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:17:27,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:17:27,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 28 [2024-02-19 15:17:27,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453286317] [2024-02-19 15:17:27,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:17:27,220 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-19 15:17:27,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:17:27,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-19 15:17:27,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2024-02-19 15:17:27,319 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-02-19 15:17:27,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 7050 transitions, 183688 flow. Second operand has 29 states, 29 states have (on average 13.206896551724139) internal successors, (383), 29 states have internal predecessors, (383), 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) [2024-02-19 15:17:27,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:17:27,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-02-19 15:17:27,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:19:45,601 INFO L124 PetriNetUnfolderBase]: 64495/107826 cut-off events. [2024-02-19 15:19:45,601 INFO L125 PetriNetUnfolderBase]: For 2253999/2254509 co-relation queries the response was YES. [2024-02-19 15:19:45,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1116923 conditions, 107826 events. 64495/107826 cut-off events. For 2253999/2254509 co-relation queries the response was YES. Maximal size of possible extension queue 3282. Compared 961460 event pairs, 2207 based on Foata normal form. 1936/104965 useless extension candidates. Maximal degree in co-relation 412317. Up to 70540 conditions per place. [2024-02-19 15:19:46,883 INFO L140 encePairwiseOnDemand]: 33/46 looper letters, 7559 selfloop transitions, 838 changer transitions 3920/12327 dead transitions. [2024-02-19 15:19:46,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 12327 transitions, 343863 flow [2024-02-19 15:19:46,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-02-19 15:19:46,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-02-19 15:19:46,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 971 transitions. [2024-02-19 15:19:46,887 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5412486064659978 [2024-02-19 15:19:46,887 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 134 predicate places. [2024-02-19 15:19:46,887 INFO L507 AbstractCegarLoop]: Abstraction has has 179 places, 12327 transitions, 343863 flow [2024-02-19 15:19:46,888 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 13.206896551724139) internal successors, (383), 29 states have internal predecessors, (383), 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) [2024-02-19 15:19:46,888 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:19:46,888 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:19:46,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-19 15:19:47,099 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 [2024-02-19 15:19:47,099 INFO L432 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:19:47,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:19:47,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1874909051, now seen corresponding path program 1 times [2024-02-19 15:19:47,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:19:47,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351461531] [2024-02-19 15:19:47,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:19:47,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:19:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:19:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-19 15:19:47,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:19:47,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351461531] [2024-02-19 15:19:47,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351461531] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:19:47,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600679094] [2024-02-19 15:19:47,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:19:47,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:19:47,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:19:47,502 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) [2024-02-19 15:19:47,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-19 15:19:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:19:47,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-19 15:19:47,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:19:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-19 15:19:47,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:19:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-19 15:19:47,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600679094] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:19:47,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:19:47,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2024-02-19 15:19:47,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926763584] [2024-02-19 15:19:47,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:19:47,778 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-19 15:19:47,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:19:47,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-19 15:19:47,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-02-19 15:19:47,779 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-19 15:19:47,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 12327 transitions, 343863 flow. Second operand has 13 states, 13 states have (on average 19.46153846153846) internal successors, (253), 13 states have internal predecessors, (253), 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) [2024-02-19 15:19:47,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:19:47,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-19 15:19:47,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:21:54,475 INFO L124 PetriNetUnfolderBase]: 40822/67508 cut-off events. [2024-02-19 15:21:54,475 INFO L125 PetriNetUnfolderBase]: For 1653766/1654060 co-relation queries the response was YES. [2024-02-19 15:21:54,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748487 conditions, 67508 events. 40822/67508 cut-off events. For 1653766/1654060 co-relation queries the response was YES. Maximal size of possible extension queue 1819. Compared 548177 event pairs, 1392 based on Foata normal form. 360/65221 useless extension candidates. Maximal degree in co-relation 438443. Up to 44534 conditions per place. [2024-02-19 15:21:55,307 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 5472 selfloop transitions, 11 changer transitions 2460/8242 dead transitions. [2024-02-19 15:21:55,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 8242 transitions, 243188 flow [2024-02-19 15:21:55,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-19 15:21:55,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-19 15:21:55,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-02-19 15:21:55,308 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5239130434782608 [2024-02-19 15:21:55,310 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 143 predicate places. [2024-02-19 15:21:55,310 INFO L507 AbstractCegarLoop]: Abstraction has has 188 places, 8242 transitions, 243188 flow [2024-02-19 15:21:55,310 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.46153846153846) internal successors, (253), 13 states have internal predecessors, (253), 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) [2024-02-19 15:21:55,310 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:21:55,310 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:21:55,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-02-19 15:21:55,512 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 [2024-02-19 15:21:55,512 INFO L432 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:21:55,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:21:55,513 INFO L85 PathProgramCache]: Analyzing trace with hash 476978566, now seen corresponding path program 5 times [2024-02-19 15:21:55,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:21:55,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531120901] [2024-02-19 15:21:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:21:55,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:21:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:21:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:21:56,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:21:56,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531120901] [2024-02-19 15:21:56,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531120901] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:21:56,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264604863] [2024-02-19 15:21:56,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 15:21:56,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:21:56,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:21:56,848 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) [2024-02-19 15:21:56,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-19 15:21:56,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-19 15:21:56,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:21:56,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-19 15:21:56,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:21:57,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2024-02-19 15:21:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-19 15:21:57,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:21:57,160 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-19 15:21:57,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-02-19 15:21:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-02-19 15:21:57,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264604863] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:21:57,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:21:57,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 5] total 23 [2024-02-19 15:21:57,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000570417] [2024-02-19 15:21:57,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:21:57,192 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-19 15:21:57,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:21:57,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-19 15:21:57,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2024-02-19 15:21:57,363 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-02-19 15:21:57,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 8242 transitions, 243188 flow. Second operand has 24 states, 24 states have (on average 12.833333333333334) internal successors, (308), 24 states have internal predecessors, (308), 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) [2024-02-19 15:21:57,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:21:57,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-02-19 15:21:57,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:24:03,943 INFO L124 PetriNetUnfolderBase]: 45348/75210 cut-off events. [2024-02-19 15:24:03,943 INFO L125 PetriNetUnfolderBase]: For 1968211/1968539 co-relation queries the response was YES. [2024-02-19 15:24:04,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 903929 conditions, 75210 events. 45348/75210 cut-off events. For 1968211/1968539 co-relation queries the response was YES. Maximal size of possible extension queue 1979. Compared 620346 event pairs, 1078 based on Foata normal form. 503/73034 useless extension candidates. Maximal degree in co-relation 522515. Up to 50159 conditions per place. [2024-02-19 15:24:05,108 INFO L140 encePairwiseOnDemand]: 29/46 looper letters, 6323 selfloop transitions, 488 changer transitions 2729/9550 dead transitions. [2024-02-19 15:24:05,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 9550 transitions, 300343 flow [2024-02-19 15:24:05,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-02-19 15:24:05,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-02-19 15:24:05,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 752 transitions. [2024-02-19 15:24:05,110 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.45410628019323673 [2024-02-19 15:24:05,110 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 177 predicate places. [2024-02-19 15:24:05,110 INFO L507 AbstractCegarLoop]: Abstraction has has 222 places, 9550 transitions, 300343 flow [2024-02-19 15:24:05,111 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 12.833333333333334) internal successors, (308), 24 states have internal predecessors, (308), 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) [2024-02-19 15:24:05,111 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:24:05,111 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:24:05,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-19 15:24:05,322 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 [2024-02-19 15:24:05,323 INFO L432 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:24:05,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:24:05,323 INFO L85 PathProgramCache]: Analyzing trace with hash -733121437, now seen corresponding path program 2 times [2024-02-19 15:24:05,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:24:05,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333415796] [2024-02-19 15:24:05,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:24:05,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:24:05,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:24:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-02-19 15:24:05,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:24:05,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333415796] [2024-02-19 15:24:05,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333415796] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 15:24:05,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 15:24:05,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-19 15:24:05,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606963345] [2024-02-19 15:24:05,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 15:24:05,392 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-19 15:24:05,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:24:05,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-19 15:24:05,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-19 15:24:05,393 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-02-19 15:24:05,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 9550 transitions, 300343 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:24:05,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:24:05,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-02-19 15:24:05,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:28:05,323 INFO L124 PetriNetUnfolderBase]: 98090/160108 cut-off events. [2024-02-19 15:28:05,323 INFO L125 PetriNetUnfolderBase]: For 5268356/5269000 co-relation queries the response was YES. [2024-02-19 15:28:05,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2052350 conditions, 160108 events. 98090/160108 cut-off events. For 5268356/5269000 co-relation queries the response was YES. Maximal size of possible extension queue 3707. Compared 1410369 event pairs, 2594 based on Foata normal form. 2757/156906 useless extension candidates. Maximal degree in co-relation 1345986. Up to 108311 conditions per place. [2024-02-19 15:28:08,083 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 11027 selfloop transitions, 1726 changer transitions 4448/17520 dead transitions. [2024-02-19 15:28:08,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 17520 transitions, 593199 flow [2024-02-19 15:28:08,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 15:28:08,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 15:28:08,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-02-19 15:28:08,084 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7228260869565217 [2024-02-19 15:28:08,085 INFO L308 CegarLoopForPetriNet]: 45 programPoint places, 180 predicate places. [2024-02-19 15:28:08,085 INFO L507 AbstractCegarLoop]: Abstraction has has 225 places, 17520 transitions, 593199 flow [2024-02-19 15:28:08,085 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:28:08,085 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:28:08,086 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:28:08,086 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-02-19 15:28:08,086 INFO L432 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-19 15:28:08,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:28:08,086 INFO L85 PathProgramCache]: Analyzing trace with hash 2024995663, now seen corresponding path program 1 times [2024-02-19 15:28:08,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:28:08,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516452612] [2024-02-19 15:28:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:28:08,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:28:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:28:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 15:28:09,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:28:09,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516452612] [2024-02-19 15:28:09,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516452612] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:28:09,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722150193] [2024-02-19 15:28:09,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:28:09,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:28:09,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:28:09,583 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) [2024-02-19 15:28:09,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-19 15:28:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:28:09,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 51 conjunts are in the unsatisfiable core [2024-02-19 15:28:09,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:28:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 15:28:10,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:28:11,389 INFO L349 Elim1Store]: treesize reduction 19, result has 79.6 percent of original size [2024-02-19 15:28:11,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 87 [2024-02-19 15:28:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 15:28:11,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722150193] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:28:11,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:28:11,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 17] total 55 [2024-02-19 15:28:11,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168977941] [2024-02-19 15:28:11,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:28:11,902 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-02-19 15:28:11,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:28:11,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-02-19 15:28:11,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2847, Unknown=0, NotChecked=0, Total=3080 [2024-02-19 15:28:12,225 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 46 [2024-02-19 15:28:12,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 17520 transitions, 593199 flow. Second operand has 56 states, 56 states have (on average 10.125) internal successors, (567), 56 states have internal predecessors, (567), 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) [2024-02-19 15:28:12,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:28:12,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 46 [2024-02-19 15:28:12,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15