./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-send-receive.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 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:53:21,920 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:53:22,013 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:53:22,019 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:53:22,019 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:53:22,056 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:53:22,057 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:53:22,057 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:53:22,058 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:53:22,062 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:53:22,062 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:53:22,063 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:53:22,064 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:53:22,065 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:53:22,065 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:53:22,065 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:53:22,066 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:53:22,066 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:53:22,066 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:53:22,066 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:53:22,067 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:53:22,067 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:53:22,067 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:53:22,068 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:53:22,068 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:53:22,068 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:53:22,068 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:53:22,069 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:53:22,069 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:53:22,070 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:53:22,071 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:53:22,071 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:53:22,072 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:53:22,072 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:53:22,072 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:53:22,072 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:53:22,072 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:53:22,073 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:53:22,073 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:53:22,073 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:53:22,073 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:53:22,074 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:53:22,074 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:53:22,074 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 [2024-01-27 15:53:22,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:53:22,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:53:22,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:53:22,348 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:53:22,348 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:53:22,349 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c [2024-01-27 15:53:23,564 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:53:23,749 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:53:23,750 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c [2024-01-27 15:53:23,768 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/284554b7a/eebce29e875744629d7090c0f822e38c/FLAG1d4c4d308 [2024-01-27 15:53:23,779 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/284554b7a/eebce29e875744629d7090c0f822e38c [2024-01-27 15:53:23,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:53:23,782 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:53:23,783 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:53:23,784 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:53:23,793 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:53:23,794 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:53:23" (1/1) ... [2024-01-27 15:53:23,795 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ed3febf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:23, skipping insertion in model container [2024-01-27 15:53:23,795 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:53:23" (1/1) ... [2024-01-27 15:53:23,817 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:53:24,028 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-send-receive.wvr.c[3146,3159] [2024-01-27 15:53:24,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:53:24,053 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:53:24,071 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-send-receive.wvr.c[3146,3159] [2024-01-27 15:53:24,074 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:53:24,089 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:53:24,089 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:24 WrapperNode [2024-01-27 15:53:24,090 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:53:24,091 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:53:24,091 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:53:24,091 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:53:24,098 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:24" (1/1) ... [2024-01-27 15:53:24,107 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:24" (1/1) ... [2024-01-27 15:53:24,130 INFO L138 Inliner]: procedures = 25, calls = 52, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 166 [2024-01-27 15:53:24,130 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:53:24,131 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:53:24,131 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:53:24,131 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:53:24,142 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:24" (1/1) ... [2024-01-27 15:53:24,142 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:24" (1/1) ... [2024-01-27 15:53:24,146 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:24" (1/1) ... [2024-01-27 15:53:24,163 INFO L175 MemorySlicer]: Split 12 memory accesses to 5 slices as follows [2, 4, 2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-01-27 15:53:24,164 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:24" (1/1) ... [2024-01-27 15:53:24,164 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:24" (1/1) ... [2024-01-27 15:53:24,173 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:24" (1/1) ... [2024-01-27 15:53:24,182 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:24" (1/1) ... [2024-01-27 15:53:24,185 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:24" (1/1) ... [2024-01-27 15:53:24,186 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:24" (1/1) ... [2024-01-27 15:53:24,203 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:53:24,204 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:53:24,204 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:53:24,204 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:53:24,205 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:24" (1/1) ... [2024-01-27 15:53:24,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:53:24,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:24,246 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 15:53:24,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 15:53:24,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:53:24,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:53:24,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:53:24,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:53:24,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:53:24,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:53:24,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:53:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:53:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:53:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:53:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:53:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:53:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:53:24,315 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:53:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:53:24,316 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:53:24,316 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 15:53:24,316 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 15:53:24,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:53:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:53:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:53:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:53:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:53:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:53:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:53:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:53:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:53:24,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:53:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:53:24,322 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:53:24,460 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:53:24,463 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:53:24,693 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:53:24,693 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:53:24,952 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:53:24,953 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:53:24,953 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:53:24 BoogieIcfgContainer [2024-01-27 15:53:24,953 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:53:24,955 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:53:24,956 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:53:24,958 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:53:24,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:53:23" (1/3) ... [2024-01-27 15:53:24,959 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6583e195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:53:24, skipping insertion in model container [2024-01-27 15:53:24,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:53:24" (2/3) ... [2024-01-27 15:53:24,960 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6583e195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:53:24, skipping insertion in model container [2024-01-27 15:53:24,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:53:24" (3/3) ... [2024-01-27 15:53:24,961 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2024-01-27 15:53:24,969 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:53:24,980 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:53:24,980 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:53:24,981 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:53:25,050 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-27 15:53:25,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 39 transitions, 99 flow [2024-01-27 15:53:25,176 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2024-01-27 15:53:25,176 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:53:25,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 36 events. 4/36 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 57 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2024-01-27 15:53:25,182 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 39 transitions, 99 flow [2024-01-27 15:53:25,186 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 35 transitions, 88 flow [2024-01-27 15:53:25,202 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:53:25,212 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4807fc58, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:53:25,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:53:25,235 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:53:25,235 INFO L124 PetriNetUnfolderBase]: 4/34 cut-off events. [2024-01-27 15:53:25,235 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:53:25,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:25,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:25,237 INFO L420 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)] === [2024-01-27 15:53:25,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:25,245 INFO L85 PathProgramCache]: Analyzing trace with hash -779910303, now seen corresponding path program 1 times [2024-01-27 15:53:25,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:25,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876313956] [2024-01-27 15:53:25,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:25,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:25,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:25,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876313956] [2024-01-27 15:53:25,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876313956] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:53:25,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:53:25,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:53:25,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052088625] [2024-01-27 15:53:25,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:53:25,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:53:25,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:25,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:53:25,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:53:25,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2024-01-27 15:53:25,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:25,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:25,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2024-01-27 15:53:25,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:26,265 INFO L124 PetriNetUnfolderBase]: 583/994 cut-off events. [2024-01-27 15:53:26,265 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-01-27 15:53:26,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1939 conditions, 994 events. 583/994 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4883 event pairs, 38 based on Foata normal form. 104/1031 useless extension candidates. Maximal degree in co-relation 1861. Up to 280 conditions per place. [2024-01-27 15:53:26,278 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 63 selfloop transitions, 5 changer transitions 0/78 dead transitions. [2024-01-27 15:53:26,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 78 transitions, 322 flow [2024-01-27 15:53:26,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:53:26,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:53:26,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-01-27 15:53:26,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6367521367521367 [2024-01-27 15:53:26,294 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 88 flow. Second operand 6 states and 149 transitions. [2024-01-27 15:53:26,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 78 transitions, 322 flow [2024-01-27 15:53:26,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 78 transitions, 302 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-27 15:53:26,303 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 110 flow [2024-01-27 15:53:26,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=110, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2024-01-27 15:53:26,309 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2024-01-27 15:53:26,309 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 110 flow [2024-01-27 15:53:26,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:26,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:26,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:26,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:53:26,311 INFO L420 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)] === [2024-01-27 15:53:26,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:26,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1650889046, now seen corresponding path program 1 times [2024-01-27 15:53:26,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:26,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578160619] [2024-01-27 15:53:26,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:26,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:26,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:26,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578160619] [2024-01-27 15:53:26,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578160619] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:53:26,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:53:26,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:53:26,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510546614] [2024-01-27 15:53:26,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:53:26,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:53:26,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:26,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:53:26,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:53:26,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 39 [2024-01-27 15:53:26,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:26,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:26,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 39 [2024-01-27 15:53:26,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:26,514 INFO L124 PetriNetUnfolderBase]: 247/482 cut-off events. [2024-01-27 15:53:26,514 INFO L125 PetriNetUnfolderBase]: For 543/637 co-relation queries the response was YES. [2024-01-27 15:53:26,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1062 conditions, 482 events. 247/482 cut-off events. For 543/637 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2211 event pairs, 87 based on Foata normal form. 110/523 useless extension candidates. Maximal degree in co-relation 462. Up to 317 conditions per place. [2024-01-27 15:53:26,518 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 26 selfloop transitions, 3 changer transitions 2/46 dead transitions. [2024-01-27 15:53:26,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 189 flow [2024-01-27 15:53:26,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:53:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:53:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-01-27 15:53:26,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6752136752136753 [2024-01-27 15:53:26,520 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 110 flow. Second operand 3 states and 79 transitions. [2024-01-27 15:53:26,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 189 flow [2024-01-27 15:53:26,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 185 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:53:26,522 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 125 flow [2024-01-27 15:53:26,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2024-01-27 15:53:26,523 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-01-27 15:53:26,523 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 125 flow [2024-01-27 15:53:26,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:26,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:26,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:26,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:53:26,525 INFO L420 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)] === [2024-01-27 15:53:26,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:26,525 INFO L85 PathProgramCache]: Analyzing trace with hash -772483127, now seen corresponding path program 1 times [2024-01-27 15:53:26,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:26,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085511445] [2024-01-27 15:53:26,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:26,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:53:26,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:26,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085511445] [2024-01-27 15:53:26,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085511445] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:53:26,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:53:26,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:53:26,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655663320] [2024-01-27 15:53:26,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:53:26,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:53:26,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:26,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:53:26,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:53:26,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 39 [2024-01-27 15:53:26,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:26,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:26,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 39 [2024-01-27 15:53:26,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:26,735 INFO L124 PetriNetUnfolderBase]: 260/507 cut-off events. [2024-01-27 15:53:26,735 INFO L125 PetriNetUnfolderBase]: For 687/822 co-relation queries the response was YES. [2024-01-27 15:53:26,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1234 conditions, 507 events. 260/507 cut-off events. For 687/822 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2325 event pairs, 157 based on Foata normal form. 125/556 useless extension candidates. Maximal degree in co-relation 972. Up to 365 conditions per place. [2024-01-27 15:53:26,739 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 24 selfloop transitions, 2 changer transitions 10/51 dead transitions. [2024-01-27 15:53:26,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 222 flow [2024-01-27 15:53:26,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:53:26,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:53:26,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-01-27 15:53:26,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2024-01-27 15:53:26,741 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 125 flow. Second operand 4 states and 98 transitions. [2024-01-27 15:53:26,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 51 transitions, 222 flow [2024-01-27 15:53:26,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:53:26,743 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 136 flow [2024-01-27 15:53:26,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-01-27 15:53:26,744 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2024-01-27 15:53:26,745 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 136 flow [2024-01-27 15:53:26,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:26,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:26,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:26,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:53:26,746 INFO L420 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)] === [2024-01-27 15:53:26,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:26,746 INFO L85 PathProgramCache]: Analyzing trace with hash -540135417, now seen corresponding path program 1 times [2024-01-27 15:53:26,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:26,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726737049] [2024-01-27 15:53:26,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:26,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:53:26,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:26,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726737049] [2024-01-27 15:53:26,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726737049] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:26,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553372052] [2024-01-27 15:53:26,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:26,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:26,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:26,840 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:53:26,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:53:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:26,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:53:26,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:27,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:53:27,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:53:27,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553372052] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:27,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:27,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 7 [2024-01-27 15:53:27,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585122664] [2024-01-27 15:53:27,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:27,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:53:27,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:27,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:53:27,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:53:27,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-01-27 15:53:27,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 136 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:27,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:27,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-01-27 15:53:27,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:27,447 INFO L124 PetriNetUnfolderBase]: 1093/1765 cut-off events. [2024-01-27 15:53:27,447 INFO L125 PetriNetUnfolderBase]: For 1955/2263 co-relation queries the response was YES. [2024-01-27 15:53:27,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4537 conditions, 1765 events. 1093/1765 cut-off events. For 1955/2263 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 8927 event pairs, 122 based on Foata normal form. 352/2005 useless extension candidates. Maximal degree in co-relation 4520. Up to 540 conditions per place. [2024-01-27 15:53:27,458 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 76 selfloop transitions, 13 changer transitions 15/112 dead transitions. [2024-01-27 15:53:27,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 112 transitions, 597 flow [2024-01-27 15:53:27,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:53:27,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:53:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-01-27 15:53:27,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49743589743589745 [2024-01-27 15:53:27,461 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 136 flow. Second operand 10 states and 194 transitions. [2024-01-27 15:53:27,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 112 transitions, 597 flow [2024-01-27 15:53:27,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 112 transitions, 585 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-01-27 15:53:27,466 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 206 flow [2024-01-27 15:53:27,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=206, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2024-01-27 15:53:27,467 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-01-27 15:53:27,467 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 206 flow [2024-01-27 15:53:27,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:27,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:27,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:27,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:53:27,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:27,688 INFO L420 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)] === [2024-01-27 15:53:27,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:27,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1306522521, now seen corresponding path program 2 times [2024-01-27 15:53:27,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:27,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566228904] [2024-01-27 15:53:27,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:27,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:28,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:28,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566228904] [2024-01-27 15:53:28,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566228904] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:28,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747170501] [2024-01-27 15:53:28,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:53:28,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:28,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:28,392 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:53:28,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 15:53:28,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:53:28,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:53:28,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-27 15:53:28,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:28,558 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 23 treesize of output 1 [2024-01-27 15:53:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:28,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:29,300 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 61 treesize of output 55 [2024-01-27 15:53:29,314 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:53:29,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-01-27 15:53:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:29,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747170501] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:29,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:29,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 27 [2024-01-27 15:53:29,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510124550] [2024-01-27 15:53:29,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:29,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:53:29,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:29,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:53:29,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:53:29,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-27 15:53:29,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 206 flow. Second operand has 28 states, 28 states have (on average 11.321428571428571) internal successors, (317), 28 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:29,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:29,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-27 15:53:29,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:33,134 INFO L124 PetriNetUnfolderBase]: 7482/11585 cut-off events. [2024-01-27 15:53:33,135 INFO L125 PetriNetUnfolderBase]: For 11670/11776 co-relation queries the response was YES. [2024-01-27 15:53:33,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32600 conditions, 11585 events. 7482/11585 cut-off events. For 11670/11776 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 69599 event pairs, 866 based on Foata normal form. 1242/12765 useless extension candidates. Maximal degree in co-relation 18477. Up to 1627 conditions per place. [2024-01-27 15:53:33,197 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 254 selfloop transitions, 76 changer transitions 160/498 dead transitions. [2024-01-27 15:53:33,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 498 transitions, 2910 flow [2024-01-27 15:53:33,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-01-27 15:53:33,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-01-27 15:53:33,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 872 transitions. [2024-01-27 15:53:33,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658119658119658 [2024-01-27 15:53:33,202 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 206 flow. Second operand 48 states and 872 transitions. [2024-01-27 15:53:33,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 498 transitions, 2910 flow [2024-01-27 15:53:33,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 498 transitions, 2892 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:53:33,295 INFO L231 Difference]: Finished difference. Result has 138 places, 118 transitions, 876 flow [2024-01-27 15:53:33,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=876, PETRI_PLACES=138, PETRI_TRANSITIONS=118} [2024-01-27 15:53:33,304 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-01-27 15:53:33,304 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 118 transitions, 876 flow [2024-01-27 15:53:33,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 11.321428571428571) internal successors, (317), 28 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:33,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:33,305 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:33,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-01-27 15:53:33,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:33,506 INFO L420 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)] === [2024-01-27 15:53:33,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:33,507 INFO L85 PathProgramCache]: Analyzing trace with hash 903165389, now seen corresponding path program 3 times [2024-01-27 15:53:33,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:33,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109585062] [2024-01-27 15:53:33,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:33,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:34,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:34,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109585062] [2024-01-27 15:53:34,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109585062] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:34,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944998264] [2024-01-27 15:53:34,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:53:34,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:34,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:34,562 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:53:34,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 15:53:34,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:53:34,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:53:34,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:53:34,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-27 15:53:34,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:35,024 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:53:35,025 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 40 treesize of output 24 [2024-01-27 15:53:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-27 15:53:35,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944998264] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:35,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:35,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 22 [2024-01-27 15:53:35,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377392294] [2024-01-27 15:53:35,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:35,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:53:35,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:35,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:53:35,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:53:35,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-01-27 15:53:35,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 118 transitions, 876 flow. Second operand has 23 states, 23 states have (on average 12.869565217391305) internal successors, (296), 23 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:35,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:35,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-01-27 15:53:35,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:36,825 INFO L124 PetriNetUnfolderBase]: 3249/5446 cut-off events. [2024-01-27 15:53:36,825 INFO L125 PetriNetUnfolderBase]: For 75164/75342 co-relation queries the response was YES. [2024-01-27 15:53:36,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27253 conditions, 5446 events. 3249/5446 cut-off events. For 75164/75342 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 32240 event pairs, 198 based on Foata normal form. 216/5578 useless extension candidates. Maximal degree in co-relation 22254. Up to 1013 conditions per place. [2024-01-27 15:53:36,886 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 123 selfloop transitions, 73 changer transitions 58/279 dead transitions. [2024-01-27 15:53:36,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 279 transitions, 2702 flow [2024-01-27 15:53:36,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:53:36,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:53:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 358 transitions. [2024-01-27 15:53:36,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371184371184371 [2024-01-27 15:53:36,889 INFO L175 Difference]: Start difference. First operand has 138 places, 118 transitions, 876 flow. Second operand 21 states and 358 transitions. [2024-01-27 15:53:36,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 279 transitions, 2702 flow [2024-01-27 15:53:37,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 279 transitions, 2393 flow, removed 140 selfloop flow, removed 8 redundant places. [2024-01-27 15:53:37,028 INFO L231 Difference]: Finished difference. Result has 149 places, 144 transitions, 1280 flow [2024-01-27 15:53:37,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1280, PETRI_PLACES=149, PETRI_TRANSITIONS=144} [2024-01-27 15:53:37,029 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-01-27 15:53:37,030 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 144 transitions, 1280 flow [2024-01-27 15:53:37,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 12.869565217391305) internal successors, (296), 23 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:37,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:37,030 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-01-27 15:53:37,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:53:37,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:37,240 INFO L420 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)] === [2024-01-27 15:53:37,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:37,241 INFO L85 PathProgramCache]: Analyzing trace with hash 409238924, now seen corresponding path program 4 times [2024-01-27 15:53:37,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:37,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248654717] [2024-01-27 15:53:37,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:37,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:37,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:53:37,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:37,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248654717] [2024-01-27 15:53:37,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248654717] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:53:37,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:53:37,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:53:37,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257784217] [2024-01-27 15:53:37,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:53:37,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:53:37,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:37,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:53:37,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:53:37,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 39 [2024-01-27 15:53:37,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 144 transitions, 1280 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:37,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:37,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 39 [2024-01-27 15:53:37,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:38,276 INFO L124 PetriNetUnfolderBase]: 2519/4859 cut-off events. [2024-01-27 15:53:38,277 INFO L125 PetriNetUnfolderBase]: For 65502/65804 co-relation queries the response was YES. [2024-01-27 15:53:38,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26268 conditions, 4859 events. 2519/4859 cut-off events. For 65502/65804 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 32610 event pairs, 566 based on Foata normal form. 321/4833 useless extension candidates. Maximal degree in co-relation 22230. Up to 1644 conditions per place. [2024-01-27 15:53:38,354 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 103 selfloop transitions, 53 changer transitions 0/211 dead transitions. [2024-01-27 15:53:38,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 211 transitions, 2232 flow [2024-01-27 15:53:38,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:53:38,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:53:38,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-01-27 15:53:38,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7435897435897436 [2024-01-27 15:53:38,356 INFO L175 Difference]: Start difference. First operand has 149 places, 144 transitions, 1280 flow. Second operand 4 states and 116 transitions. [2024-01-27 15:53:38,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 211 transitions, 2232 flow [2024-01-27 15:53:38,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 211 transitions, 1974 flow, removed 96 selfloop flow, removed 11 redundant places. [2024-01-27 15:53:38,529 INFO L231 Difference]: Finished difference. Result has 143 places, 185 transitions, 1777 flow [2024-01-27 15:53:38,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1102, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1777, PETRI_PLACES=143, PETRI_TRANSITIONS=185} [2024-01-27 15:53:38,530 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-01-27 15:53:38,530 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 185 transitions, 1777 flow [2024-01-27 15:53:38,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:38,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:38,531 INFO L208 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] [2024-01-27 15:53:38,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:53:38,531 INFO L420 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)] === [2024-01-27 15:53:38,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:38,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1837968839, now seen corresponding path program 5 times [2024-01-27 15:53:38,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:38,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269376418] [2024-01-27 15:53:38,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:38,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:53:38,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:38,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269376418] [2024-01-27 15:53:38,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269376418] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:38,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902177659] [2024-01-27 15:53:38,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:53:38,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:38,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:38,688 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:53:38,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 15:53:38,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:53:38,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:53:38,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:53:38,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:53:38,800 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:53:38,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902177659] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:53:38,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:53:38,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-01-27 15:53:38,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271169332] [2024-01-27 15:53:38,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:53:38,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:53:38,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:38,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:53:38,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:53:38,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2024-01-27 15:53:38,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 185 transitions, 1777 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:38,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:38,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2024-01-27 15:53:38,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:40,131 INFO L124 PetriNetUnfolderBase]: 4072/7292 cut-off events. [2024-01-27 15:53:40,131 INFO L125 PetriNetUnfolderBase]: For 78752/79301 co-relation queries the response was YES. [2024-01-27 15:53:40,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37501 conditions, 7292 events. 4072/7292 cut-off events. For 78752/79301 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 46657 event pairs, 1054 based on Foata normal form. 725/7749 useless extension candidates. Maximal degree in co-relation 33062. Up to 3304 conditions per place. [2024-01-27 15:53:40,232 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 150 selfloop transitions, 10 changer transitions 14/201 dead transitions. [2024-01-27 15:53:40,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 201 transitions, 2252 flow [2024-01-27 15:53:40,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:53:40,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:53:40,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-01-27 15:53:40,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-01-27 15:53:40,233 INFO L175 Difference]: Start difference. First operand has 143 places, 185 transitions, 1777 flow. Second operand 4 states and 96 transitions. [2024-01-27 15:53:40,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 201 transitions, 2252 flow [2024-01-27 15:53:40,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 201 transitions, 2180 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-01-27 15:53:40,360 INFO L231 Difference]: Finished difference. Result has 141 places, 159 transitions, 1563 flow [2024-01-27 15:53:40,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1583, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1563, PETRI_PLACES=141, PETRI_TRANSITIONS=159} [2024-01-27 15:53:40,364 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-01-27 15:53:40,364 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 159 transitions, 1563 flow [2024-01-27 15:53:40,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:40,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:40,365 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-01-27 15:53:40,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-01-27 15:53:40,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:40,579 INFO L420 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)] === [2024-01-27 15:53:40,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:40,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1011429065, now seen corresponding path program 1 times [2024-01-27 15:53:40,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:40,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410120188] [2024-01-27 15:53:40,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:40,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:41,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:41,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410120188] [2024-01-27 15:53:41,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410120188] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:41,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200101763] [2024-01-27 15:53:41,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:41,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:41,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:41,653 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:53:41,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 15:53:41,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:41,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 15:53:41,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:42,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:42,677 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:53:42,677 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 75 treesize of output 60 [2024-01-27 15:53:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:43,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200101763] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:43,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:43,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2024-01-27 15:53:43,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330116727] [2024-01-27 15:53:43,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:43,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-01-27 15:53:43,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:43,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-01-27 15:53:43,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2024-01-27 15:53:43,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-27 15:53:43,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 159 transitions, 1563 flow. Second operand has 36 states, 36 states have (on average 11.5) internal successors, (414), 36 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:43,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:43,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-27 15:53:43,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:53,093 INFO L124 PetriNetUnfolderBase]: 24318/37838 cut-off events. [2024-01-27 15:53:53,093 INFO L125 PetriNetUnfolderBase]: For 321324/321828 co-relation queries the response was YES. [2024-01-27 15:53:53,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185048 conditions, 37838 events. 24318/37838 cut-off events. For 321324/321828 co-relation queries the response was YES. Maximal size of possible extension queue 982. Compared 258107 event pairs, 2186 based on Foata normal form. 1344/38967 useless extension candidates. Maximal degree in co-relation 175230. Up to 5093 conditions per place. [2024-01-27 15:53:53,474 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 661 selfloop transitions, 387 changer transitions 349/1405 dead transitions. [2024-01-27 15:53:53,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 1405 transitions, 15738 flow [2024-01-27 15:53:53,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-01-27 15:53:53,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2024-01-27 15:53:53,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 1631 transitions. [2024-01-27 15:53:53,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45956607495069035 [2024-01-27 15:53:53,483 INFO L175 Difference]: Start difference. First operand has 141 places, 159 transitions, 1563 flow. Second operand 91 states and 1631 transitions. [2024-01-27 15:53:53,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 1405 transitions, 15738 flow [2024-01-27 15:53:54,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 1405 transitions, 14982 flow, removed 376 selfloop flow, removed 9 redundant places. [2024-01-27 15:53:54,372 INFO L231 Difference]: Finished difference. Result has 251 places, 477 transitions, 6438 flow [2024-01-27 15:53:54,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1532, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=6438, PETRI_PLACES=251, PETRI_TRANSITIONS=477} [2024-01-27 15:53:54,373 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 210 predicate places. [2024-01-27 15:53:54,374 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 477 transitions, 6438 flow [2024-01-27 15:53:54,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 11.5) internal successors, (414), 36 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:54,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:54,374 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-01-27 15:53:54,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:53:54,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:54,585 INFO L420 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)] === [2024-01-27 15:53:54,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:54,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1177710745, now seen corresponding path program 2 times [2024-01-27 15:53:54,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:54,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620994939] [2024-01-27 15:53:54,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:54,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:54,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:55,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:55,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620994939] [2024-01-27 15:53:55,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620994939] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:55,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014384061] [2024-01-27 15:53:55,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:53:55,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:55,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:55,699 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:53:55,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 15:53:55,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:53:55,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:53:55,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:53:55,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:56,320 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-01-27 15:53:56,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2024-01-27 15:53:56,344 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:56,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:56,697 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-01-27 15:53:56,698 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 74 treesize of output 60 [2024-01-27 15:53:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:57,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014384061] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:57,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:57,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 39 [2024-01-27 15:53:57,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761162398] [2024-01-27 15:53:57,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:57,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-01-27 15:53:57,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:57,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-01-27 15:53:57,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2024-01-27 15:53:57,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-01-27 15:53:57,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 477 transitions, 6438 flow. Second operand has 40 states, 40 states have (on average 10.4) internal successors, (416), 40 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:57,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:57,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-01-27 15:53:57,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:19,709 INFO L124 PetriNetUnfolderBase]: 39892/63729 cut-off events. [2024-01-27 15:54:19,710 INFO L125 PetriNetUnfolderBase]: For 2003415/2003439 co-relation queries the response was YES. [2024-01-27 15:54:20,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397282 conditions, 63729 events. 39892/63729 cut-off events. For 2003415/2003439 co-relation queries the response was YES. Maximal size of possible extension queue 1153. Compared 464282 event pairs, 1538 based on Foata normal form. 1556/65240 useless extension candidates. Maximal degree in co-relation 388952. Up to 9415 conditions per place. [2024-01-27 15:54:20,794 INFO L140 encePairwiseOnDemand]: 22/39 looper letters, 1270 selfloop transitions, 978 changer transitions 434/2702 dead transitions. [2024-01-27 15:54:20,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 2702 transitions, 36544 flow [2024-01-27 15:54:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2024-01-27 15:54:20,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2024-01-27 15:54:20,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 2349 transitions. [2024-01-27 15:54:20,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43964065131948343 [2024-01-27 15:54:20,800 INFO L175 Difference]: Start difference. First operand has 251 places, 477 transitions, 6438 flow. Second operand 137 states and 2349 transitions. [2024-01-27 15:54:20,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 2702 transitions, 36544 flow [2024-01-27 15:54:31,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 2702 transitions, 32615 flow, removed 1816 selfloop flow, removed 18 redundant places. [2024-01-27 15:54:31,541 INFO L231 Difference]: Finished difference. Result has 412 places, 1297 transitions, 17672 flow [2024-01-27 15:54:31,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4411, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=137, PETRI_FLOW=17672, PETRI_PLACES=412, PETRI_TRANSITIONS=1297} [2024-01-27 15:54:31,542 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 371 predicate places. [2024-01-27 15:54:31,542 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 1297 transitions, 17672 flow [2024-01-27 15:54:31,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 10.4) internal successors, (416), 40 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:31,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:31,543 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-01-27 15:54:31,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 15:54:31,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:31,753 INFO L420 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)] === [2024-01-27 15:54:31,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:31,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1301934113, now seen corresponding path program 3 times [2024-01-27 15:54:31,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:31,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983008835] [2024-01-27 15:54:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:31,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:32,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:32,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983008835] [2024-01-27 15:54:32,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983008835] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:32,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619175317] [2024-01-27 15:54:32,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:54:32,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:32,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:32,497 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:54:32,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:54:32,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:54:32,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:54:32,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 38 conjunts are in the unsatisfiable core [2024-01-27 15:54:32,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:33,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:33,444 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:54:33,445 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 75 treesize of output 60 [2024-01-27 15:54:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:33,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619175317] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:33,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:33,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 37 [2024-01-27 15:54:33,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674972219] [2024-01-27 15:54:33,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:33,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-27 15:54:33,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:33,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-27 15:54:33,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1163, Unknown=0, NotChecked=0, Total=1406 [2024-01-27 15:54:33,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-01-27 15:54:33,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1297 transitions, 17672 flow. Second operand has 38 states, 38 states have (on average 11.18421052631579) internal successors, (425), 38 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:33,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:33,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-01-27 15:54:33,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand