./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 47fde0ba5912e0415b0c299af0f3ae7b3e6a5b956bf726bb77299079d74126b4 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:32:01,921 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:32:01,993 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:32:02,001 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:32:02,001 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:32:02,042 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:32:02,043 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:32:02,043 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:32:02,044 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:32:02,045 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:32:02,045 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:32:02,046 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:32:02,046 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:32:02,047 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:32:02,047 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:32:02,047 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:32:02,048 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:32:02,048 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:32:02,052 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:32:02,053 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:32:02,053 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:32:02,054 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:32:02,054 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:32:02,054 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:32:02,055 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:32:02,055 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:32:02,055 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:32:02,055 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:32:02,056 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:32:02,056 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:32:02,056 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:32:02,057 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:32:02,057 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:32:02,057 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:32:02,057 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:32:02,058 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:32:02,058 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:32:02,058 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:32:02,064 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:32:02,064 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:32:02,065 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:32:02,066 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:32:02,066 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 47fde0ba5912e0415b0c299af0f3ae7b3e6a5b956bf726bb77299079d74126b4 [2024-10-11 14:32:02,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:32:02,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:32:02,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:32:02,360 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:32:02,361 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:32:02,363 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c [2024-10-11 14:32:03,867 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:32:04,076 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:32:04,077 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c [2024-10-11 14:32:04,084 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/d73256eec/39db56f768064d4aa4c4aa4376bfb005/FLAGc9f575097 [2024-10-11 14:32:04,097 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/d73256eec/39db56f768064d4aa4c4aa4376bfb005 [2024-10-11 14:32:04,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:32:04,102 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:32:04,104 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:32:04,104 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:32:04,108 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:32:04,109 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:04" (1/1) ... [2024-10-11 14:32:04,110 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d784a4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:04, skipping insertion in model container [2024-10-11 14:32:04,110 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:04" (1/1) ... [2024-10-11 14:32:04,136 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:32:04,373 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c[3336,3349] [2024-10-11 14:32:04,381 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:32:04,392 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:32:04,429 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c[3336,3349] [2024-10-11 14:32:04,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:32:04,459 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:32:04,460 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:04 WrapperNode [2024-10-11 14:32:04,460 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:32:04,461 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:32:04,462 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:32:04,462 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:32:04,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:04" (1/1) ... [2024-10-11 14:32:04,482 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:04" (1/1) ... [2024-10-11 14:32:04,506 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 150 [2024-10-11 14:32:04,507 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:32:04,508 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:32:04,508 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:32:04,508 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:32:04,518 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:04" (1/1) ... [2024-10-11 14:32:04,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:04" (1/1) ... [2024-10-11 14:32:04,521 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:04" (1/1) ... [2024-10-11 14:32:04,548 INFO L175 MemorySlicer]: Split 15 memory accesses to 2 slices as follows [2, 13]. 87 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-10-11 14:32:04,549 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:04" (1/1) ... [2024-10-11 14:32:04,549 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:04" (1/1) ... [2024-10-11 14:32:04,560 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:04" (1/1) ... [2024-10-11 14:32:04,568 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:04" (1/1) ... [2024-10-11 14:32:04,570 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:04" (1/1) ... [2024-10-11 14:32:04,572 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:04" (1/1) ... [2024-10-11 14:32:04,575 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:32:04,576 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:32:04,576 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:32:04,576 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:32:04,577 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:04" (1/1) ... [2024-10-11 14:32:04,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:32:04,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:04,619 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:32:04,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:32:04,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:32:04,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:32:04,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:32:04,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:32:04,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:32:04,679 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:32:04,680 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:32:04,680 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:32:04,681 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:32:04,681 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-11 14:32:04,681 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-11 14:32:04,681 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-10-11 14:32:04,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-10-11 14:32:04,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:32:04,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:32:04,684 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2024-10-11 14:32:04,684 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2024-10-11 14:32:04,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 14:32:04,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 14:32:04,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 14:32:04,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:32:04,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:32:04,687 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:32:04,852 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:32:04,856 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:32:05,256 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:32:05,256 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:32:05,523 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:32:05,524 INFO L314 CfgBuilder]: Removed 5 assume(true) statements. [2024-10-11 14:32:05,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:05 BoogieIcfgContainer [2024-10-11 14:32:05,525 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:32:05,527 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:32:05,527 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:32:05,530 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:32:05,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:32:04" (1/3) ... [2024-10-11 14:32:05,531 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69ef6e48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:05, skipping insertion in model container [2024-10-11 14:32:05,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:04" (2/3) ... [2024-10-11 14:32:05,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69ef6e48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:05, skipping insertion in model container [2024-10-11 14:32:05,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:05" (3/3) ... [2024-10-11 14:32:05,533 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc-dec.wvr.c [2024-10-11 14:32:05,549 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:32:05,549 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:32:05,549 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:32:05,618 INFO L143 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2024-10-11 14:32:05,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 55 transitions, 145 flow [2024-10-11 14:32:05,699 INFO L124 PetriNetUnfolderBase]: 5/50 cut-off events. [2024-10-11 14:32:05,699 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-10-11 14:32:05,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 50 events. 5/50 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 95 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2024-10-11 14:32:05,704 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 55 transitions, 145 flow [2024-10-11 14:32:05,707 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 49 transitions, 128 flow [2024-10-11 14:32:05,715 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:32:05,722 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5b6ce772, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:32:05,723 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-11 14:32:05,746 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:32:05,746 INFO L124 PetriNetUnfolderBase]: 5/48 cut-off events. [2024-10-11 14:32:05,747 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-10-11 14:32:05,747 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:05,750 INFO L204 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] [2024-10-11 14:32:05,751 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-11 14:32:05,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:05,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1258520641, now seen corresponding path program 1 times [2024-10-11 14:32:05,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:05,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54272583] [2024-10-11 14:32:05,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:05,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:05,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:06,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:06,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54272583] [2024-10-11 14:32:06,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54272583] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:32:06,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:32:06,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:32:06,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336512946] [2024-10-11 14:32:06,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:32:06,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:32:06,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:06,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:32:06,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:32:06,319 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 55 [2024-10-11 14:32:06,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-10-11 14:32:06,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:06,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 55 [2024-10-11 14:32:06,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:09,049 INFO L124 PetriNetUnfolderBase]: 18001/23960 cut-off events. [2024-10-11 14:32:09,050 INFO L125 PetriNetUnfolderBase]: For 1303/1303 co-relation queries the response was YES. [2024-10-11 14:32:09,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48086 conditions, 23960 events. 18001/23960 cut-off events. For 1303/1303 co-relation queries the response was YES. Maximal size of possible extension queue 1091. Compared 139428 event pairs, 7644 based on Foata normal form. 698/24062 useless extension candidates. Maximal degree in co-relation 45099. Up to 14906 conditions per place. [2024-10-11 14:32:09,381 INFO L140 encePairwiseOnDemand]: 51/55 looper letters, 55 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2024-10-11 14:32:09,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 300 flow [2024-10-11 14:32:09,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:32:09,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:32:09,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-10-11 14:32:09,399 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5954545454545455 [2024-10-11 14:32:09,401 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 128 flow. Second operand 4 states and 131 transitions. [2024-10-11 14:32:09,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 300 flow [2024-10-11 14:32:09,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 71 transitions, 272 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-10-11 14:32:09,480 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 122 flow [2024-10-11 14:32:09,482 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-10-11 14:32:09,488 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -6 predicate places. [2024-10-11 14:32:09,488 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 122 flow [2024-10-11 14:32:09,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-10-11 14:32:09,489 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:09,489 INFO L204 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, 1] [2024-10-11 14:32:09,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:32:09,490 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-11 14:32:09,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:09,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1157598103, now seen corresponding path program 1 times [2024-10-11 14:32:09,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:09,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800073912] [2024-10-11 14:32:09,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:09,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:32:09,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:09,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800073912] [2024-10-11 14:32:09,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800073912] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:32:09,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:32:09,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:32:09,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199908298] [2024-10-11 14:32:09,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:32:09,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:32:09,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:09,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:32:09,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:32:09,706 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 55 [2024-10-11 14:32:09,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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) [2024-10-11 14:32:09,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:09,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 55 [2024-10-11 14:32:09,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:12,306 INFO L124 PetriNetUnfolderBase]: 23690/31979 cut-off events. [2024-10-11 14:32:12,307 INFO L125 PetriNetUnfolderBase]: For 5044/5044 co-relation queries the response was YES. [2024-10-11 14:32:12,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67399 conditions, 31979 events. 23690/31979 cut-off events. For 5044/5044 co-relation queries the response was YES. Maximal size of possible extension queue 1351. Compared 195383 event pairs, 13075 based on Foata normal form. 792/32071 useless extension candidates. Maximal degree in co-relation 8987. Up to 21469 conditions per place. [2024-10-11 14:32:12,553 INFO L140 encePairwiseOnDemand]: 51/55 looper letters, 60 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2024-10-11 14:32:12,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 75 transitions, 312 flow [2024-10-11 14:32:12,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:32:12,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:32:12,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-10-11 14:32:12,558 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-10-11 14:32:12,558 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 122 flow. Second operand 4 states and 130 transitions. [2024-10-11 14:32:12,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 75 transitions, 312 flow [2024-10-11 14:32:12,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 75 transitions, 306 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 14:32:12,572 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 132 flow [2024-10-11 14:32:12,573 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-10-11 14:32:12,574 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -4 predicate places. [2024-10-11 14:32:12,574 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 132 flow [2024-10-11 14:32:12,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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) [2024-10-11 14:32:12,574 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:12,575 INFO L204 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, 1, 1, 1, 1] [2024-10-11 14:32:12,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:32:12,576 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-11 14:32:12,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:12,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1509482004, now seen corresponding path program 1 times [2024-10-11 14:32:12,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:12,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319966357] [2024-10-11 14:32:12,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:12,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:32:12,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:12,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319966357] [2024-10-11 14:32:12,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319966357] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:32:12,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:32:12,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:32:12,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042020110] [2024-10-11 14:32:12,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:32:12,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:32:12,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:12,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:32:12,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:32:12,763 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 55 [2024-10-11 14:32:12,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:12,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:12,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 55 [2024-10-11 14:32:12,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:15,385 INFO L124 PetriNetUnfolderBase]: 27195/36341 cut-off events. [2024-10-11 14:32:15,385 INFO L125 PetriNetUnfolderBase]: For 7592/8697 co-relation queries the response was YES. [2024-10-11 14:32:15,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80954 conditions, 36341 events. 27195/36341 cut-off events. For 7592/8697 co-relation queries the response was YES. Maximal size of possible extension queue 1271. Compared 215351 event pairs, 15696 based on Foata normal form. 2101/37386 useless extension candidates. Maximal degree in co-relation 22058. Up to 24521 conditions per place. [2024-10-11 14:32:15,599 INFO L140 encePairwiseOnDemand]: 51/55 looper letters, 61 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2024-10-11 14:32:15,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 76 transitions, 329 flow [2024-10-11 14:32:15,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:32:15,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:32:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-10-11 14:32:15,603 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5863636363636363 [2024-10-11 14:32:15,603 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 132 flow. Second operand 4 states and 129 transitions. [2024-10-11 14:32:15,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 76 transitions, 329 flow [2024-10-11 14:32:15,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 76 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 14:32:15,611 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 142 flow [2024-10-11 14:32:15,612 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2024-10-11 14:32:15,612 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -2 predicate places. [2024-10-11 14:32:15,613 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 142 flow [2024-10-11 14:32:15,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:15,614 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:15,614 INFO L204 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:15,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:32:15,614 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-11 14:32:15,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:15,616 INFO L85 PathProgramCache]: Analyzing trace with hash 598558971, now seen corresponding path program 1 times [2024-10-11 14:32:15,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:15,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967519352] [2024-10-11 14:32:15,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:15,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:15,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:15,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967519352] [2024-10-11 14:32:15,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967519352] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:32:15,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:32:15,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:32:15,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213461914] [2024-10-11 14:32:15,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:32:15,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:32:15,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:15,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:32:15,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:32:15,757 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 55 [2024-10-11 14:32:15,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2024-10-11 14:32:15,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:15,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 55 [2024-10-11 14:32:15,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:18,607 INFO L124 PetriNetUnfolderBase]: 34269/46032 cut-off events. [2024-10-11 14:32:18,607 INFO L125 PetriNetUnfolderBase]: For 12821/15641 co-relation queries the response was YES. [2024-10-11 14:32:18,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106443 conditions, 46032 events. 34269/46032 cut-off events. For 12821/15641 co-relation queries the response was YES. Maximal size of possible extension queue 1682. Compared 293763 event pairs, 19010 based on Foata normal form. 4202/49375 useless extension candidates. Maximal degree in co-relation 30507. Up to 29381 conditions per place. [2024-10-11 14:32:18,866 INFO L140 encePairwiseOnDemand]: 51/55 looper letters, 60 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2024-10-11 14:32:18,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 76 transitions, 341 flow [2024-10-11 14:32:18,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:32:18,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:32:18,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-10-11 14:32:18,868 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-10-11 14:32:18,869 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 142 flow. Second operand 4 states and 130 transitions. [2024-10-11 14:32:18,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 76 transitions, 341 flow [2024-10-11 14:32:18,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 14:32:18,877 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 152 flow [2024-10-11 14:32:18,877 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2024-10-11 14:32:18,879 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 0 predicate places. [2024-10-11 14:32:18,880 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 152 flow [2024-10-11 14:32:18,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2024-10-11 14:32:18,880 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:18,880 INFO L204 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:18,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:32:18,881 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-11 14:32:18,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:18,881 INFO L85 PathProgramCache]: Analyzing trace with hash 413711588, now seen corresponding path program 1 times [2024-10-11 14:32:18,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:18,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341786402] [2024-10-11 14:32:18,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:18,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:32:19,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:19,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341786402] [2024-10-11 14:32:19,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341786402] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:32:19,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:32:19,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:32:19,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088927211] [2024-10-11 14:32:19,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:32:19,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:32:19,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:19,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:32:19,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:32:19,094 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 55 [2024-10-11 14:32:19,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:19,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:19,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 55 [2024-10-11 14:32:19,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:22,207 INFO L124 PetriNetUnfolderBase]: 34269/45731 cut-off events. [2024-10-11 14:32:22,208 INFO L125 PetriNetUnfolderBase]: For 18778/21598 co-relation queries the response was YES. [2024-10-11 14:32:22,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111602 conditions, 45731 events. 34269/45731 cut-off events. For 18778/21598 co-relation queries the response was YES. Maximal size of possible extension queue 1669. Compared 285240 event pairs, 28600 based on Foata normal form. 2820/47830 useless extension candidates. Maximal degree in co-relation 32765. Up to 43084 conditions per place. [2024-10-11 14:32:22,420 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 39 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2024-10-11 14:32:22,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 236 flow [2024-10-11 14:32:22,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:32:22,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:32:22,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-10-11 14:32:22,421 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5575757575757576 [2024-10-11 14:32:22,421 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 152 flow. Second operand 3 states and 92 transitions. [2024-10-11 14:32:22,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 236 flow [2024-10-11 14:32:22,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 54 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 14:32:22,443 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 160 flow [2024-10-11 14:32:22,443 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2024-10-11 14:32:22,444 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2024-10-11 14:32:22,444 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 160 flow [2024-10-11 14:32:22,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:22,444 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:22,445 INFO L204 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:22,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 14:32:22,445 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-11 14:32:22,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:22,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1919709710, now seen corresponding path program 1 times [2024-10-11 14:32:22,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:22,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012569225] [2024-10-11 14:32:22,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:22,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:23,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:32:23,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:23,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012569225] [2024-10-11 14:32:23,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012569225] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:32:23,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755854640] [2024-10-11 14:32:23,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:23,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:23,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:23,059 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:32:23,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:32:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:23,183 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 14:32:23,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:32:23,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:32:23,483 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 15 treesize of output 7 [2024-10-11 14:32:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:23,549 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:32:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:32:24,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755854640] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:32:24,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:32:24,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 8] total 22 [2024-10-11 14:32:24,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117711001] [2024-10-11 14:32:24,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:32:24,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 14:32:24,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:24,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 14:32:24,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-10-11 14:32:24,264 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 55 [2024-10-11 14:32:24,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 160 flow. Second operand has 22 states, 22 states have (on average 20.136363636363637) internal successors, (443), 22 states have internal predecessors, (443), 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) [2024-10-11 14:32:24,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:24,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 55 [2024-10-11 14:32:24,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand