./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.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-more-multiply-verify.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 d79cb5dae664e13779624ff0ffbc531b419f89e2c7510a92e890992a52ee7c98 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:47:30,181 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:47:30,260 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:47:30,262 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:47:30,263 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:47:30,287 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:47:30,288 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:47:30,288 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:47:30,288 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:47:30,291 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:47:30,291 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:47:30,292 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:47:30,292 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:47:30,293 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:47:30,293 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:47:30,294 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:47:30,294 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:47:30,294 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:47:30,294 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:47:30,294 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:47:30,295 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:47:30,295 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:47:30,295 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:47:30,295 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:47:30,295 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:47:30,296 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:47:30,297 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:47:30,297 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:47:30,297 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:47:30,297 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:47:30,298 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:47:30,298 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:47:30,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:47:30,299 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:47:30,299 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:47:30,299 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:47:30,299 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:47:30,299 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:47:30,299 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:47:30,299 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:47:30,300 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:47:30,300 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:47:30,300 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:47:30,300 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d79cb5dae664e13779624ff0ffbc531b419f89e2c7510a92e890992a52ee7c98 [2024-01-27 15:47:30,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:47:30,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:47:30,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:47:30,525 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:47:30,525 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:47:30,526 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2024-01-27 15:47:31,526 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:47:31,670 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:47:31,671 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2024-01-27 15:47:31,676 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52ade54d0/43141edfe9c64994a84c92949d04845f/FLAGe2ff85d0a [2024-01-27 15:47:31,686 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52ade54d0/43141edfe9c64994a84c92949d04845f [2024-01-27 15:47:31,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:47:31,688 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:47:31,689 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:47:31,689 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:47:31,703 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:47:31,704 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:47:31" (1/1) ... [2024-01-27 15:47:31,704 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@293411b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:31, skipping insertion in model container [2024-01-27 15:47:31,704 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:47:31" (1/1) ... [2024-01-27 15:47:31,725 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:47:31,857 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-more-multiply-verify.wvr.c[3081,3094] [2024-01-27 15:47:31,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:47:31,870 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:47:31,889 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-more-multiply-verify.wvr.c[3081,3094] [2024-01-27 15:47:31,892 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:47:31,902 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:47:31,903 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:31 WrapperNode [2024-01-27 15:47:31,903 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:47:31,904 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:47:31,904 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:47:31,904 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:47:31,909 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:31" (1/1) ... [2024-01-27 15:47:31,915 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:31" (1/1) ... [2024-01-27 15:47:31,944 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 189 [2024-01-27 15:47:31,945 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:47:31,946 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:47:31,946 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:47:31,946 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:47:31,954 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:31" (1/1) ... [2024-01-27 15:47:31,954 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:31" (1/1) ... [2024-01-27 15:47:31,957 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:31" (1/1) ... [2024-01-27 15:47:31,973 INFO L175 MemorySlicer]: Split 13 memory accesses to 5 slices as follows [2, 5, 2, 2, 2]. 38 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 15:47:31,974 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:31" (1/1) ... [2024-01-27 15:47:31,974 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:31" (1/1) ... [2024-01-27 15:47:31,979 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:31" (1/1) ... [2024-01-27 15:47:31,982 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:31" (1/1) ... [2024-01-27 15:47:31,983 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:31" (1/1) ... [2024-01-27 15:47:31,984 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:31" (1/1) ... [2024-01-27 15:47:31,986 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:47:31,987 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:47:31,987 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:47:31,987 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:47:31,988 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:31" (1/1) ... [2024-01-27 15:47:31,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:47:32,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:32,021 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 15:47:32,052 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 15:47:32,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:47:32,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:47:32,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:47:32,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:47:32,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:47:32,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:47:32,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:47:32,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:47:32,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:47:32,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:47:32,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:47:32,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:47:32,100 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:47:32,100 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:47:32,100 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:47:32,100 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:47:32,100 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 15:47:32,100 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 15:47:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:47:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:47:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:47:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:47:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:47:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:47:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:47:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:47:32,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:47:32,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:47:32,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:47:32,103 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 15:47:32,196 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:47:32,197 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:47:32,377 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:47:32,377 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:47:32,515 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:47:32,515 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:47:32,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:47:32 BoogieIcfgContainer [2024-01-27 15:47:32,516 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:47:32,518 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:47:32,518 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:47:32,520 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:47:32,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:47:31" (1/3) ... [2024-01-27 15:47:32,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dae3059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:47:32, skipping insertion in model container [2024-01-27 15:47:32,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:31" (2/3) ... [2024-01-27 15:47:32,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dae3059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:47:32, skipping insertion in model container [2024-01-27 15:47:32,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:47:32" (3/3) ... [2024-01-27 15:47:32,523 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2024-01-27 15:47:32,529 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:47:32,535 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:47:32,535 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:47:32,535 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:47:32,583 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-27 15:47:32,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 37 transitions, 95 flow [2024-01-27 15:47:32,641 INFO L124 PetriNetUnfolderBase]: 3/34 cut-off events. [2024-01-27 15:47:32,641 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:47:32,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 34 events. 3/34 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 54 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-01-27 15:47:32,643 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 37 transitions, 95 flow [2024-01-27 15:47:32,645 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 33 transitions, 84 flow [2024-01-27 15:47:32,662 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:47:32,668 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;@6c2bb403, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:47:32,668 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:47:32,685 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:47:32,685 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2024-01-27 15:47:32,685 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:47:32,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:32,686 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] [2024-01-27 15:47:32,686 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 15:47:32,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:32,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1429538076, now seen corresponding path program 1 times [2024-01-27 15:47:32,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:32,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721881724] [2024-01-27 15:47:32,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:32,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:33,024 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 15:47:33,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:33,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721881724] [2024-01-27 15:47:33,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721881724] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:33,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:47:33,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:47:33,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292080809] [2024-01-27 15:47:33,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:33,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:47:33,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:33,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:47:33,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:47:33,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-01-27 15:47:33,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 15:47:33,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:33,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-01-27 15:47:33,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:33,223 INFO L124 PetriNetUnfolderBase]: 377/611 cut-off events. [2024-01-27 15:47:33,224 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2024-01-27 15:47:33,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1288 conditions, 611 events. 377/611 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2151 event pairs, 136 based on Foata normal form. 9/607 useless extension candidates. Maximal degree in co-relation 1069. Up to 477 conditions per place. [2024-01-27 15:47:33,233 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 37 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2024-01-27 15:47:33,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 196 flow [2024-01-27 15:47:33,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:47:33,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:47:33,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-01-27 15:47:33,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126126126126126 [2024-01-27 15:47:33,245 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 84 flow. Second operand 3 states and 68 transitions. [2024-01-27 15:47:33,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 196 flow [2024-01-27 15:47:33,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 46 transitions, 180 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-27 15:47:33,252 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 91 flow [2024-01-27 15:47:33,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2024-01-27 15:47:33,256 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -3 predicate places. [2024-01-27 15:47:33,256 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 91 flow [2024-01-27 15:47:33,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 15:47:33,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:33,257 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] [2024-01-27 15:47:33,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:47:33,257 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 15:47:33,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:33,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1439560030, now seen corresponding path program 2 times [2024-01-27 15:47:33,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:33,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209200] [2024-01-27 15:47:33,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:33,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:33,503 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 15:47:33,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:33,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209200] [2024-01-27 15:47:33,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209200] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:33,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:47:33,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:47:33,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84970980] [2024-01-27 15:47:33,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:33,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:47:33,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:33,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:47:33,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:47:33,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-01-27 15:47:33,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 15:47:33,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:33,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-01-27 15:47:33,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:33,638 INFO L124 PetriNetUnfolderBase]: 447/747 cut-off events. [2024-01-27 15:47:33,639 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2024-01-27 15:47:33,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635 conditions, 747 events. 447/747 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2814 event pairs, 340 based on Foata normal form. 26/749 useless extension candidates. Maximal degree in co-relation 520. Up to 592 conditions per place. [2024-01-27 15:47:33,643 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 28 selfloop transitions, 2 changer transitions 13/49 dead transitions. [2024-01-27 15:47:33,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 49 transitions, 208 flow [2024-01-27 15:47:33,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:47:33,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:47:33,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2024-01-27 15:47:33,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5337837837837838 [2024-01-27 15:47:33,646 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 91 flow. Second operand 4 states and 79 transitions. [2024-01-27 15:47:33,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 49 transitions, 208 flow [2024-01-27 15:47:33,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 49 transitions, 205 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:47:33,651 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 104 flow [2024-01-27 15:47:33,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2024-01-27 15:47:33,652 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2024-01-27 15:47:33,652 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 104 flow [2024-01-27 15:47:33,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 15:47:33,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:33,653 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 15:47:33,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:47:33,656 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 15:47:33,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:33,657 INFO L85 PathProgramCache]: Analyzing trace with hash 475046753, now seen corresponding path program 1 times [2024-01-27 15:47:33,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:33,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351778099] [2024-01-27 15:47:33,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:33,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:47:33,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:33,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351778099] [2024-01-27 15:47:33,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351778099] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:33,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:47:33,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:47:33,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230947882] [2024-01-27 15:47:33,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:33,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:47:33,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:33,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:47:33,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:47:33,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-01-27 15:47:33,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 15:47:33,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:33,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-01-27 15:47:33,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:33,842 INFO L124 PetriNetUnfolderBase]: 237/412 cut-off events. [2024-01-27 15:47:33,842 INFO L125 PetriNetUnfolderBase]: For 110/124 co-relation queries the response was YES. [2024-01-27 15:47:33,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 931 conditions, 412 events. 237/412 cut-off events. For 110/124 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1354 event pairs, 60 based on Foata normal form. 34/434 useless extension candidates. Maximal degree in co-relation 917. Up to 152 conditions per place. [2024-01-27 15:47:33,845 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 43 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-01-27 15:47:33,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 54 transitions, 240 flow [2024-01-27 15:47:33,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:47:33,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:47:33,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-01-27 15:47:33,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2024-01-27 15:47:33,847 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 104 flow. Second operand 4 states and 84 transitions. [2024-01-27 15:47:33,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 54 transitions, 240 flow [2024-01-27 15:47:33,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 54 transitions, 232 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-01-27 15:47:33,850 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 112 flow [2024-01-27 15:47:33,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2024-01-27 15:47:33,851 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2024-01-27 15:47:33,851 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 112 flow [2024-01-27 15:47:33,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 15:47:33,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:33,851 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 15:47:33,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:47:33,852 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 15:47:33,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:33,852 INFO L85 PathProgramCache]: Analyzing trace with hash -911811271, now seen corresponding path program 2 times [2024-01-27 15:47:33,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:33,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526533220] [2024-01-27 15:47:33,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:33,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:33,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:33,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526533220] [2024-01-27 15:47:33,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526533220] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:33,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175360670] [2024-01-27 15:47:33,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:47:33,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:33,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:33,981 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 15:47:34,008 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 15:47:34,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-27 15:47:34,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:47:34,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:47:34,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:47:34,297 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:47:34,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175360670] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:34,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:47:34,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2024-01-27 15:47:34,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869346514] [2024-01-27 15:47:34,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:34,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:47:34,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:34,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:47:34,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:47:34,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:47:34,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 112 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 15:47:34,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:34,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:47:34,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:34,582 INFO L124 PetriNetUnfolderBase]: 574/975 cut-off events. [2024-01-27 15:47:34,582 INFO L125 PetriNetUnfolderBase]: For 447/455 co-relation queries the response was YES. [2024-01-27 15:47:34,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2297 conditions, 975 events. 574/975 cut-off events. For 447/455 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4448 event pairs, 143 based on Foata normal form. 6/978 useless extension candidates. Maximal degree in co-relation 2278. Up to 369 conditions per place. [2024-01-27 15:47:34,586 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 65 selfloop transitions, 14 changer transitions 21/104 dead transitions. [2024-01-27 15:47:34,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 104 transitions, 495 flow [2024-01-27 15:47:34,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:47:34,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:47:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-01-27 15:47:34,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.527027027027027 [2024-01-27 15:47:34,590 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 112 flow. Second operand 8 states and 156 transitions. [2024-01-27 15:47:34,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 104 transitions, 495 flow [2024-01-27 15:47:34,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 104 transitions, 475 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-01-27 15:47:34,595 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 211 flow [2024-01-27 15:47:34,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=211, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-01-27 15:47:34,596 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 13 predicate places. [2024-01-27 15:47:34,596 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 211 flow [2024-01-27 15:47:34,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 15:47:34,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:34,597 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 15:47:34,611 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 15:47:34,798 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 15:47:34,798 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 15:47:34,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:34,799 INFO L85 PathProgramCache]: Analyzing trace with hash 998430467, now seen corresponding path program 3 times [2024-01-27 15:47:34,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:34,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013591608] [2024-01-27 15:47:34,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:34,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:34,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:34,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013591608] [2024-01-27 15:47:34,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013591608] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:34,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278874359] [2024-01-27 15:47:34,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:47:34,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:34,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:34,909 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 15:47:34,932 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 15:47:34,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-27 15:47:34,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:47:34,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:47:35,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:47:35,129 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:47:35,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278874359] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:35,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:47:35,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2024-01-27 15:47:35,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241296459] [2024-01-27 15:47:35,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:35,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:47:35,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:35,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:47:35,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:47:35,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:47:35,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 211 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 15:47:35,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:35,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:47:35,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:35,403 INFO L124 PetriNetUnfolderBase]: 770/1304 cut-off events. [2024-01-27 15:47:35,403 INFO L125 PetriNetUnfolderBase]: For 1255/1262 co-relation queries the response was YES. [2024-01-27 15:47:35,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3731 conditions, 1304 events. 770/1304 cut-off events. For 1255/1262 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6330 event pairs, 199 based on Foata normal form. 6/1308 useless extension candidates. Maximal degree in co-relation 3715. Up to 437 conditions per place. [2024-01-27 15:47:35,409 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 67 selfloop transitions, 21 changer transitions 21/113 dead transitions. [2024-01-27 15:47:35,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 113 transitions, 655 flow [2024-01-27 15:47:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:47:35,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:47:35,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-01-27 15:47:35,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5236486486486487 [2024-01-27 15:47:35,410 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 211 flow. Second operand 8 states and 155 transitions. [2024-01-27 15:47:35,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 113 transitions, 655 flow [2024-01-27 15:47:35,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 113 transitions, 627 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-01-27 15:47:35,414 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 359 flow [2024-01-27 15:47:35,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=359, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-01-27 15:47:35,415 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 20 predicate places. [2024-01-27 15:47:35,415 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 359 flow [2024-01-27 15:47:35,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 15:47:35,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:35,415 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 15:47:35,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:47:35,627 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 15:47:35,627 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 15:47:35,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:35,628 INFO L85 PathProgramCache]: Analyzing trace with hash 583778315, now seen corresponding path program 4 times [2024-01-27 15:47:35,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:35,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653248818] [2024-01-27 15:47:35,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:35,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:35,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:35,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653248818] [2024-01-27 15:47:35,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653248818] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:35,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101190609] [2024-01-27 15:47:35,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:47:35,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:35,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:35,723 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 15:47:35,724 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 15:47:35,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:47:35,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:47:35,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:47:35,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:35,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:47:35,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:35,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101190609] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:47:35,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:47:35,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-01-27 15:47:35,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180830009] [2024-01-27 15:47:35,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:47:35,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:47:35,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:35,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:47:35,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:47:35,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-01-27 15:47:35,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 359 flow. Second operand has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 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 15:47:35,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:35,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-01-27 15:47:35,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:36,126 INFO L124 PetriNetUnfolderBase]: 1135/1989 cut-off events. [2024-01-27 15:47:36,126 INFO L125 PetriNetUnfolderBase]: For 2941/2949 co-relation queries the response was YES. [2024-01-27 15:47:36,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6133 conditions, 1989 events. 1135/1989 cut-off events. For 2941/2949 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11383 event pairs, 626 based on Foata normal form. 38/1988 useless extension candidates. Maximal degree in co-relation 6113. Up to 924 conditions per place. [2024-01-27 15:47:36,136 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 42 selfloop transitions, 3 changer transitions 40/100 dead transitions. [2024-01-27 15:47:36,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 100 transitions, 743 flow [2024-01-27 15:47:36,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:47:36,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:47:36,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-01-27 15:47:36,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5180180180180181 [2024-01-27 15:47:36,138 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 359 flow. Second operand 6 states and 115 transitions. [2024-01-27 15:47:36,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 100 transitions, 743 flow [2024-01-27 15:47:36,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 100 transitions, 731 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-01-27 15:47:36,146 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 391 flow [2024-01-27 15:47:36,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-01-27 15:47:36,146 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 24 predicate places. [2024-01-27 15:47:36,147 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 391 flow [2024-01-27 15:47:36,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 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 15:47:36,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:36,147 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:36,161 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 15:47:36,358 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 15:47:36,359 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 15:47:36,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:36,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1003628010, now seen corresponding path program 5 times [2024-01-27 15:47:36,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:36,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883056778] [2024-01-27 15:47:36,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:36,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:37,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:37,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883056778] [2024-01-27 15:47:37,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883056778] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:37,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266217899] [2024-01-27 15:47:37,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:47:37,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:37,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:37,825 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 15:47:37,828 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 15:47:37,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:47:37,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:47:37,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 15:47:37,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:37,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:47:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:38,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:47:39,004 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 82 treesize of output 74 [2024-01-27 15:47:39,053 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-27 15:47:39,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 145 treesize of output 129 [2024-01-27 15:47:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:39,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266217899] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:47:39,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:47:39,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-01-27 15:47:39,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088400539] [2024-01-27 15:47:39,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:47:39,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-27 15:47:39,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:39,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-27 15:47:39,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2024-01-27 15:47:39,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:47:39,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 391 flow. Second operand has 32 states, 32 states have (on average 9.4375) internal successors, (302), 32 states have internal predecessors, (302), 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 15:47:39,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:39,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:47:39,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:42,693 INFO L124 PetriNetUnfolderBase]: 2950/5018 cut-off events. [2024-01-27 15:47:42,693 INFO L125 PetriNetUnfolderBase]: For 9804/9804 co-relation queries the response was YES. [2024-01-27 15:47:42,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16289 conditions, 5018 events. 2950/5018 cut-off events. For 9804/9804 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 31939 event pairs, 838 based on Foata normal form. 2/5013 useless extension candidates. Maximal degree in co-relation 16257. Up to 1279 conditions per place. [2024-01-27 15:47:42,725 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 262 selfloop transitions, 73 changer transitions 56/395 dead transitions. [2024-01-27 15:47:42,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 395 transitions, 2704 flow [2024-01-27 15:47:42,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-27 15:47:42,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-27 15:47:42,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 540 transitions. [2024-01-27 15:47:42,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707933740191805 [2024-01-27 15:47:42,728 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 391 flow. Second operand 31 states and 540 transitions. [2024-01-27 15:47:42,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 395 transitions, 2704 flow [2024-01-27 15:47:42,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 395 transitions, 2582 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-01-27 15:47:42,761 INFO L231 Difference]: Finished difference. Result has 100 places, 131 transitions, 1239 flow [2024-01-27 15:47:42,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1239, PETRI_PLACES=100, PETRI_TRANSITIONS=131} [2024-01-27 15:47:42,762 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 60 predicate places. [2024-01-27 15:47:42,762 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 131 transitions, 1239 flow [2024-01-27 15:47:42,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 9.4375) internal successors, (302), 32 states have internal predecessors, (302), 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 15:47:42,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:42,763 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:42,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 15:47:42,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:42,974 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 15:47:42,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:42,974 INFO L85 PathProgramCache]: Analyzing trace with hash 2041689512, now seen corresponding path program 6 times [2024-01-27 15:47:42,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:42,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765849751] [2024-01-27 15:47:42,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:42,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:43,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:43,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765849751] [2024-01-27 15:47:43,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765849751] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:43,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889093791] [2024-01-27 15:47:43,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:47:43,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:43,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:43,629 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 15:47:43,633 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 15:47:43,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-01-27 15:47:43,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:47:43,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-27 15:47:43,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:43,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:47:43,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889093791] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:43,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:47:43,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2024-01-27 15:47:43,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914565469] [2024-01-27 15:47:43,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:43,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:47:43,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:43,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:47:43,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:47:43,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:47:43,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 131 transitions, 1239 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 15:47:43,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:43,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:47:43,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:44,371 INFO L124 PetriNetUnfolderBase]: 3018/5155 cut-off events. [2024-01-27 15:47:44,372 INFO L125 PetriNetUnfolderBase]: For 14256/14256 co-relation queries the response was YES. [2024-01-27 15:47:44,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18101 conditions, 5155 events. 3018/5155 cut-off events. For 14256/14256 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 33250 event pairs, 832 based on Foata normal form. 2/5145 useless extension candidates. Maximal degree in co-relation 18043. Up to 1843 conditions per place. [2024-01-27 15:47:44,417 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 98 selfloop transitions, 68 changer transitions 22/192 dead transitions. [2024-01-27 15:47:44,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 192 transitions, 1825 flow [2024-01-27 15:47:44,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:47:44,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:47:44,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-01-27 15:47:44,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5371621621621622 [2024-01-27 15:47:44,418 INFO L175 Difference]: Start difference. First operand has 100 places, 131 transitions, 1239 flow. Second operand 8 states and 159 transitions. [2024-01-27 15:47:44,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 192 transitions, 1825 flow [2024-01-27 15:47:44,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 192 transitions, 1711 flow, removed 53 selfloop flow, removed 10 redundant places. [2024-01-27 15:47:44,479 INFO L231 Difference]: Finished difference. Result has 94 places, 133 transitions, 1319 flow [2024-01-27 15:47:44,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1319, PETRI_PLACES=94, PETRI_TRANSITIONS=133} [2024-01-27 15:47:44,480 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 54 predicate places. [2024-01-27 15:47:44,480 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 133 transitions, 1319 flow [2024-01-27 15:47:44,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 15:47:44,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:44,481 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:44,492 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 15:47:44,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:44,685 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 15:47:44,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:44,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1737680986, now seen corresponding path program 7 times [2024-01-27 15:47:44,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:44,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604087312] [2024-01-27 15:47:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:44,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:45,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:45,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604087312] [2024-01-27 15:47:45,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604087312] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:45,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232948903] [2024-01-27 15:47:45,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:47:45,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:45,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:45,501 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 15:47:45,502 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 15:47:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:45,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:47:45,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:47:45,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:47:45,858 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:47:45,858 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 58 treesize of output 60 [2024-01-27 15:47:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:45,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232948903] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:45,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:47:45,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11, 8] total 23 [2024-01-27 15:47:45,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006995199] [2024-01-27 15:47:45,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:45,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:47:45,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:45,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:47:45,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:47:45,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:47:45,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 133 transitions, 1319 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 15:47:45,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:45,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:47:45,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:46,556 INFO L124 PetriNetUnfolderBase]: 3058/5253 cut-off events. [2024-01-27 15:47:46,556 INFO L125 PetriNetUnfolderBase]: For 18815/18845 co-relation queries the response was YES. [2024-01-27 15:47:46,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18795 conditions, 5253 events. 3058/5253 cut-off events. For 18815/18845 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 34124 event pairs, 852 based on Foata normal form. 28/5277 useless extension candidates. Maximal degree in co-relation 18747. Up to 1623 conditions per place. [2024-01-27 15:47:46,581 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 99 selfloop transitions, 61 changer transitions 22/186 dead transitions. [2024-01-27 15:47:46,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 186 transitions, 1861 flow [2024-01-27 15:47:46,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:47:46,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:47:46,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-01-27 15:47:46,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067567567567568 [2024-01-27 15:47:46,583 INFO L175 Difference]: Start difference. First operand has 94 places, 133 transitions, 1319 flow. Second operand 8 states and 150 transitions. [2024-01-27 15:47:46,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 186 transitions, 1861 flow [2024-01-27 15:47:46,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 186 transitions, 1738 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-01-27 15:47:46,648 INFO L231 Difference]: Finished difference. Result has 96 places, 135 transitions, 1382 flow [2024-01-27 15:47:46,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1382, PETRI_PLACES=96, PETRI_TRANSITIONS=135} [2024-01-27 15:47:46,648 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 56 predicate places. [2024-01-27 15:47:46,648 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 135 transitions, 1382 flow [2024-01-27 15:47:46,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 15:47:46,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:46,649 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:46,660 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 15:47:46,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:46,851 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 15:47:46,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:46,851 INFO L85 PathProgramCache]: Analyzing trace with hash 132130216, now seen corresponding path program 8 times [2024-01-27 15:47:46,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:46,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894181323] [2024-01-27 15:47:46,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:46,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:47,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:47,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894181323] [2024-01-27 15:47:47,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894181323] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:47,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332678618] [2024-01-27 15:47:47,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:47:47,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:47,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:47,520 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 15:47:47,522 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 15:47:47,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-27 15:47:47,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:47:47,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-27 15:47:47,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:47,777 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:47:47,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332678618] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:47,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:47:47,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2024-01-27 15:47:47,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751570340] [2024-01-27 15:47:47,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:47,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:47:47,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:47,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:47:47,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:47:47,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:47:47,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 135 transitions, 1382 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 15:47:47,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:47,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:47:47,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:48,253 INFO L124 PetriNetUnfolderBase]: 3070/5275 cut-off events. [2024-01-27 15:47:48,253 INFO L125 PetriNetUnfolderBase]: For 21727/21765 co-relation queries the response was YES. [2024-01-27 15:47:48,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19272 conditions, 5275 events. 3070/5275 cut-off events. For 21727/21765 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 34101 event pairs, 886 based on Foata normal form. 28/5299 useless extension candidates. Maximal degree in co-relation 19223. Up to 2151 conditions per place. [2024-01-27 15:47:48,280 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 108 selfloop transitions, 55 changer transitions 22/189 dead transitions. [2024-01-27 15:47:48,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 189 transitions, 1954 flow [2024-01-27 15:47:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:47:48,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:47:48,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-01-27 15:47:48,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4966216216216216 [2024-01-27 15:47:48,282 INFO L175 Difference]: Start difference. First operand has 96 places, 135 transitions, 1382 flow. Second operand 8 states and 147 transitions. [2024-01-27 15:47:48,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 189 transitions, 1954 flow [2024-01-27 15:47:48,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 189 transitions, 1855 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-01-27 15:47:48,360 INFO L231 Difference]: Finished difference. Result has 99 places, 138 transitions, 1453 flow [2024-01-27 15:47:48,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1285, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1453, PETRI_PLACES=99, PETRI_TRANSITIONS=138} [2024-01-27 15:47:48,360 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 59 predicate places. [2024-01-27 15:47:48,360 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 138 transitions, 1453 flow [2024-01-27 15:47:48,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 15:47:48,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:48,361 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:48,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 15:47:48,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:48,572 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 15:47:48,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:48,573 INFO L85 PathProgramCache]: Analyzing trace with hash 36581817, now seen corresponding path program 1 times [2024-01-27 15:47:48,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:48,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152831245] [2024-01-27 15:47:48,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:48,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:48,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:48,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152831245] [2024-01-27 15:47:48,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152831245] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:48,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466317082] [2024-01-27 15:47:48,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:48,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:48,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:48,664 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:47:48,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 15:47:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:48,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:47:48,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:48,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:47:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:48,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466317082] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:48,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:47:48,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2024-01-27 15:47:48,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181993256] [2024-01-27 15:47:48,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:48,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:47:48,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:48,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:47:48,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:47:48,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:47:48,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 138 transitions, 1453 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 15:47:48,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:48,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:47:48,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:49,380 INFO L124 PetriNetUnfolderBase]: 4189/6897 cut-off events. [2024-01-27 15:47:49,380 INFO L125 PetriNetUnfolderBase]: For 27226/27237 co-relation queries the response was YES. [2024-01-27 15:47:49,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24331 conditions, 6897 events. 4189/6897 cut-off events. For 27226/27237 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43440 event pairs, 1022 based on Foata normal form. 5/6028 useless extension candidates. Maximal degree in co-relation 24276. Up to 3188 conditions per place. [2024-01-27 15:47:49,418 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 180 selfloop transitions, 7 changer transitions 0/219 dead transitions. [2024-01-27 15:47:49,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 219 transitions, 2733 flow [2024-01-27 15:47:49,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:47:49,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:47:49,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-01-27 15:47:49,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6283783783783784 [2024-01-27 15:47:49,419 INFO L175 Difference]: Start difference. First operand has 99 places, 138 transitions, 1453 flow. Second operand 4 states and 93 transitions. [2024-01-27 15:47:49,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 219 transitions, 2733 flow [2024-01-27 15:47:49,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 219 transitions, 2560 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-01-27 15:47:49,536 INFO L231 Difference]: Finished difference. Result has 98 places, 144 transitions, 1422 flow [2024-01-27 15:47:49,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1422, PETRI_PLACES=98, PETRI_TRANSITIONS=144} [2024-01-27 15:47:49,537 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 58 predicate places. [2024-01-27 15:47:49,538 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 144 transitions, 1422 flow [2024-01-27 15:47:49,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 15:47:49,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:49,538 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:49,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-27 15:47:49,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-01-27 15:47:49,751 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:47:49,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:49,752 INFO L85 PathProgramCache]: Analyzing trace with hash -652592877, now seen corresponding path program 2 times [2024-01-27 15:47:49,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:49,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290350969] [2024-01-27 15:47:49,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:49,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:49,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:49,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290350969] [2024-01-27 15:47:49,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290350969] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:49,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:47:49,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:47:49,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752856922] [2024-01-27 15:47:49,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:49,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:47:49,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:49,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:47:49,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:47:49,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:47:49,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 144 transitions, 1422 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:49,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:49,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:47:49,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:50,372 INFO L124 PetriNetUnfolderBase]: 4330/7313 cut-off events. [2024-01-27 15:47:50,372 INFO L125 PetriNetUnfolderBase]: For 25466/25489 co-relation queries the response was YES. [2024-01-27 15:47:50,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26981 conditions, 7313 events. 4330/7313 cut-off events. For 25466/25489 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 48877 event pairs, 2184 based on Foata normal form. 51/7290 useless extension candidates. Maximal degree in co-relation 26574. Up to 5212 conditions per place. [2024-01-27 15:47:50,414 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 138 selfloop transitions, 22 changer transitions 9/201 dead transitions. [2024-01-27 15:47:50,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 201 transitions, 2254 flow [2024-01-27 15:47:50,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:47:50,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:47:50,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-01-27 15:47:50,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5135135135135135 [2024-01-27 15:47:50,416 INFO L175 Difference]: Start difference. First operand has 98 places, 144 transitions, 1422 flow. Second operand 5 states and 95 transitions. [2024-01-27 15:47:50,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 201 transitions, 2254 flow [2024-01-27 15:47:50,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 201 transitions, 2254 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:47:50,587 INFO L231 Difference]: Finished difference. Result has 105 places, 153 transitions, 1551 flow [2024-01-27 15:47:50,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1551, PETRI_PLACES=105, PETRI_TRANSITIONS=153} [2024-01-27 15:47:50,588 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 65 predicate places. [2024-01-27 15:47:50,588 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 153 transitions, 1551 flow [2024-01-27 15:47:50,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:50,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:50,589 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:50,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-27 15:47:50,589 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:47:50,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:50,589 INFO L85 PathProgramCache]: Analyzing trace with hash 607257794, now seen corresponding path program 1 times [2024-01-27 15:47:50,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:50,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372085478] [2024-01-27 15:47:50,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:50,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:50,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:50,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:50,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372085478] [2024-01-27 15:47:50,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372085478] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:50,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:47:50,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:47:50,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618920228] [2024-01-27 15:47:50,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:50,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:47:50,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:50,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:47:50,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:47:50,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:47:50,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 153 transitions, 1551 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:50,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:50,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:47:50,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:51,308 INFO L124 PetriNetUnfolderBase]: 4455/7689 cut-off events. [2024-01-27 15:47:51,309 INFO L125 PetriNetUnfolderBase]: For 33538/33556 co-relation queries the response was YES. [2024-01-27 15:47:51,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31197 conditions, 7689 events. 4455/7689 cut-off events. For 33538/33556 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 53104 event pairs, 1948 based on Foata normal form. 138/7753 useless extension candidates. Maximal degree in co-relation 30378. Up to 4732 conditions per place. [2024-01-27 15:47:51,347 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 156 selfloop transitions, 27 changer transitions 13/226 dead transitions. [2024-01-27 15:47:51,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 226 transitions, 2725 flow [2024-01-27 15:47:51,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:47:51,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:47:51,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-01-27 15:47:51,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297297297297298 [2024-01-27 15:47:51,349 INFO L175 Difference]: Start difference. First operand has 105 places, 153 transitions, 1551 flow. Second operand 5 states and 98 transitions. [2024-01-27 15:47:51,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 226 transitions, 2725 flow [2024-01-27 15:47:51,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 226 transitions, 2713 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-01-27 15:47:51,599 INFO L231 Difference]: Finished difference. Result has 112 places, 158 transitions, 1685 flow [2024-01-27 15:47:51,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1685, PETRI_PLACES=112, PETRI_TRANSITIONS=158} [2024-01-27 15:47:51,600 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 72 predicate places. [2024-01-27 15:47:51,600 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 158 transitions, 1685 flow [2024-01-27 15:47:51,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:51,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:51,600 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:51,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-27 15:47:51,600 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:47:51,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:51,601 INFO L85 PathProgramCache]: Analyzing trace with hash -686077896, now seen corresponding path program 2 times [2024-01-27 15:47:51,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:51,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048267573] [2024-01-27 15:47:51,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:51,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:51,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:51,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048267573] [2024-01-27 15:47:51,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048267573] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:51,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:47:51,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:47:51,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069272955] [2024-01-27 15:47:51,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:51,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:47:51,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:51,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:47:51,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:47:51,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:47:51,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 158 transitions, 1685 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 15:47:51,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:51,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:47:51,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:52,408 INFO L124 PetriNetUnfolderBase]: 4654/8046 cut-off events. [2024-01-27 15:47:52,408 INFO L125 PetriNetUnfolderBase]: For 40365/40376 co-relation queries the response was YES. [2024-01-27 15:47:52,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35938 conditions, 8046 events. 4654/8046 cut-off events. For 40365/40376 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 56048 event pairs, 786 based on Foata normal form. 73/8061 useless extension candidates. Maximal degree in co-relation 34319. Up to 3679 conditions per place. [2024-01-27 15:47:52,458 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 193 selfloop transitions, 33 changer transitions 8/264 dead transitions. [2024-01-27 15:47:52,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 264 transitions, 3242 flow [2024-01-27 15:47:52,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:47:52,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:47:52,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-01-27 15:47:52,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444015444015444 [2024-01-27 15:47:52,460 INFO L175 Difference]: Start difference. First operand has 112 places, 158 transitions, 1685 flow. Second operand 7 states and 141 transitions. [2024-01-27 15:47:52,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 264 transitions, 3242 flow [2024-01-27 15:47:52,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 264 transitions, 3228 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-01-27 15:47:52,674 INFO L231 Difference]: Finished difference. Result has 118 places, 163 transitions, 1838 flow [2024-01-27 15:47:52,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1838, PETRI_PLACES=118, PETRI_TRANSITIONS=163} [2024-01-27 15:47:52,674 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 78 predicate places. [2024-01-27 15:47:52,675 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 163 transitions, 1838 flow [2024-01-27 15:47:52,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 15:47:52,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:52,675 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:52,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-01-27 15:47:52,675 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:47:52,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:52,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1148760254, now seen corresponding path program 3 times [2024-01-27 15:47:52,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:52,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10887475] [2024-01-27 15:47:52,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:52,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:52,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:52,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10887475] [2024-01-27 15:47:52,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10887475] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:52,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:47:52,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:47:52,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390677012] [2024-01-27 15:47:52,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:52,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:47:52,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:52,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:47:52,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:47:52,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:47:52,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 163 transitions, 1838 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:52,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:52,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:47:52,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:53,428 INFO L124 PetriNetUnfolderBase]: 4602/7999 cut-off events. [2024-01-27 15:47:53,428 INFO L125 PetriNetUnfolderBase]: For 49849/49969 co-relation queries the response was YES. [2024-01-27 15:47:53,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37095 conditions, 7999 events. 4602/7999 cut-off events. For 49849/49969 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 56166 event pairs, 1436 based on Foata normal form. 318/8219 useless extension candidates. Maximal degree in co-relation 36660. Up to 3450 conditions per place. [2024-01-27 15:47:53,559 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 150 selfloop transitions, 32 changer transitions 12/222 dead transitions. [2024-01-27 15:47:53,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 222 transitions, 2725 flow [2024-01-27 15:47:53,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:47:53,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:47:53,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-01-27 15:47:53,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5837837837837838 [2024-01-27 15:47:53,561 INFO L175 Difference]: Start difference. First operand has 118 places, 163 transitions, 1838 flow. Second operand 5 states and 108 transitions. [2024-01-27 15:47:53,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 222 transitions, 2725 flow [2024-01-27 15:47:53,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 222 transitions, 2649 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-01-27 15:47:53,774 INFO L231 Difference]: Finished difference. Result has 118 places, 159 transitions, 1815 flow [2024-01-27 15:47:53,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1765, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1815, PETRI_PLACES=118, PETRI_TRANSITIONS=159} [2024-01-27 15:47:53,774 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 78 predicate places. [2024-01-27 15:47:53,775 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 159 transitions, 1815 flow [2024-01-27 15:47:53,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:53,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:53,775 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:53,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-01-27 15:47:53,775 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:47:53,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:53,776 INFO L85 PathProgramCache]: Analyzing trace with hash 708341094, now seen corresponding path program 4 times [2024-01-27 15:47:53,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:53,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171583563] [2024-01-27 15:47:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:53,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:53,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:53,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171583563] [2024-01-27 15:47:53,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171583563] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:53,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131076613] [2024-01-27 15:47:53,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:47:53,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:53,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:53,841 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:47:53,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 15:47:53,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:47:53,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:47:53,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:47:53,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:53,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:53,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:47:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:53,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131076613] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:47:53,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:47:53,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-01-27 15:47:53,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870718608] [2024-01-27 15:47:53,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:47:53,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-27 15:47:53,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:53,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-27 15:47:53,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:47:53,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:47:53,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 159 transitions, 1815 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:53,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:53,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:47:53,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:54,684 INFO L124 PetriNetUnfolderBase]: 3936/6894 cut-off events. [2024-01-27 15:47:54,685 INFO L125 PetriNetUnfolderBase]: For 41537/41552 co-relation queries the response was YES. [2024-01-27 15:47:54,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32231 conditions, 6894 events. 3936/6894 cut-off events. For 41537/41552 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 47967 event pairs, 1304 based on Foata normal form. 107/6915 useless extension candidates. Maximal degree in co-relation 30677. Up to 3556 conditions per place. [2024-01-27 15:47:54,719 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 145 selfloop transitions, 43 changer transitions 16/230 dead transitions. [2024-01-27 15:47:54,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 230 transitions, 2861 flow [2024-01-27 15:47:54,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:47:54,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:47:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-01-27 15:47:54,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019305019305019 [2024-01-27 15:47:54,721 INFO L175 Difference]: Start difference. First operand has 118 places, 159 transitions, 1815 flow. Second operand 7 states and 130 transitions. [2024-01-27 15:47:54,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 230 transitions, 2861 flow [2024-01-27 15:47:54,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 230 transitions, 2754 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-01-27 15:47:54,870 INFO L231 Difference]: Finished difference. Result has 119 places, 148 transitions, 1693 flow [2024-01-27 15:47:54,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1693, PETRI_PLACES=119, PETRI_TRANSITIONS=148} [2024-01-27 15:47:54,870 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 79 predicate places. [2024-01-27 15:47:54,871 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 148 transitions, 1693 flow [2024-01-27 15:47:54,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:54,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:54,871 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:54,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-27 15:47:55,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 15:47:55,072 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:47:55,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:55,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1855758995, now seen corresponding path program 3 times [2024-01-27 15:47:55,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:55,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143361663] [2024-01-27 15:47:55,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:55,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:55,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:55,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143361663] [2024-01-27 15:47:55,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143361663] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:55,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:47:55,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:47:55,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790012773] [2024-01-27 15:47:55,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:55,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:47:55,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:55,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:47:55,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:47:55,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:47:55,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 148 transitions, 1693 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:55,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:55,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:47:55,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:55,635 INFO L124 PetriNetUnfolderBase]: 3443/6008 cut-off events. [2024-01-27 15:47:55,635 INFO L125 PetriNetUnfolderBase]: For 39550/39564 co-relation queries the response was YES. [2024-01-27 15:47:55,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29221 conditions, 6008 events. 3443/6008 cut-off events. For 39550/39564 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 39265 event pairs, 1280 based on Foata normal form. 92/6012 useless extension candidates. Maximal degree in co-relation 28637. Up to 3207 conditions per place. [2024-01-27 15:47:55,674 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 127 selfloop transitions, 11 changer transitions 26/186 dead transitions. [2024-01-27 15:47:55,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 186 transitions, 2319 flow [2024-01-27 15:47:55,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:47:55,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:47:55,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-01-27 15:47:55,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5513513513513514 [2024-01-27 15:47:55,675 INFO L175 Difference]: Start difference. First operand has 119 places, 148 transitions, 1693 flow. Second operand 5 states and 102 transitions. [2024-01-27 15:47:55,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 186 transitions, 2319 flow [2024-01-27 15:47:55,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 186 transitions, 2210 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-01-27 15:47:55,799 INFO L231 Difference]: Finished difference. Result has 115 places, 130 transitions, 1417 flow [2024-01-27 15:47:55,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1531, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1417, PETRI_PLACES=115, PETRI_TRANSITIONS=130} [2024-01-27 15:47:55,799 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 75 predicate places. [2024-01-27 15:47:55,799 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 130 transitions, 1417 flow [2024-01-27 15:47:55,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:55,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:55,800 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 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 15:47:55,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-01-27 15:47:55,800 INFO L420 AbstractCegarLoop]: === Iteration 18 === 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 15:47:55,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:55,801 INFO L85 PathProgramCache]: Analyzing trace with hash 709893098, now seen corresponding path program 9 times [2024-01-27 15:47:55,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:55,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172600726] [2024-01-27 15:47:55,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:55,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:57,945 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:57,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:57,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172600726] [2024-01-27 15:47:57,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172600726] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:57,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861196433] [2024-01-27 15:47:57,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:47:57,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:57,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:57,946 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:47:57,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 15:47:58,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-27 15:47:58,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:47:58,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:47:58,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-01-27 15:47:58,224 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:47:58,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861196433] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:58,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:47:58,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [15] total 21 [2024-01-27 15:47:58,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673231797] [2024-01-27 15:47:58,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:58,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:47:58,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:58,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:47:58,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:47:58,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:47:58,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 130 transitions, 1417 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 15:47:58,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:58,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:47:58,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:58,895 INFO L124 PetriNetUnfolderBase]: 3288/5806 cut-off events. [2024-01-27 15:47:58,896 INFO L125 PetriNetUnfolderBase]: For 32852/32892 co-relation queries the response was YES. [2024-01-27 15:47:58,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27303 conditions, 5806 events. 3288/5806 cut-off events. For 32852/32892 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 38730 event pairs, 1096 based on Foata normal form. 33/5801 useless extension candidates. Maximal degree in co-relation 26935. Up to 2390 conditions per place. [2024-01-27 15:47:58,929 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 84 selfloop transitions, 49 changer transitions 38/187 dead transitions. [2024-01-27 15:47:58,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 187 transitions, 2005 flow [2024-01-27 15:47:58,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:47:58,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:47:58,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-01-27 15:47:58,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067567567567568 [2024-01-27 15:47:58,930 INFO L175 Difference]: Start difference. First operand has 115 places, 130 transitions, 1417 flow. Second operand 8 states and 150 transitions. [2024-01-27 15:47:58,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 187 transitions, 2005 flow [2024-01-27 15:47:58,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 187 transitions, 1943 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-01-27 15:47:58,997 INFO L231 Difference]: Finished difference. Result has 115 places, 125 transitions, 1402 flow [2024-01-27 15:47:58,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1402, PETRI_PLACES=115, PETRI_TRANSITIONS=125} [2024-01-27 15:47:58,997 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 75 predicate places. [2024-01-27 15:47:58,997 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 125 transitions, 1402 flow [2024-01-27 15:47:58,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 15:47:58,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:58,998 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:59,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-27 15:47:59,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-27 15:47:59,205 INFO L420 AbstractCegarLoop]: === Iteration 19 === 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 15:47:59,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:59,205 INFO L85 PathProgramCache]: Analyzing trace with hash -711261151, now seen corresponding path program 1 times [2024-01-27 15:47:59,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:59,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300059983] [2024-01-27 15:47:59,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:59,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:01,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:01,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300059983] [2024-01-27 15:48:01,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300059983] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:01,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112382663] [2024-01-27 15:48:01,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:01,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:01,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:01,229 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:48:01,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-27 15:48:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:01,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:48:01,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:01,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:48:01,744 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:48:01,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 40 [2024-01-27 15:48:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:01,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:02,809 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 80 treesize of output 72 [2024-01-27 15:48:02,842 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-27 15:48:02,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 177 treesize of output 148 [2024-01-27 15:48:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:03,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112382663] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:03,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:03,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2024-01-27 15:48:03,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012717240] [2024-01-27 15:48:03,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:03,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-01-27 15:48:03,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:03,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-01-27 15:48:03,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2024-01-27 15:48:03,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:48:03,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 125 transitions, 1402 flow. Second operand has 37 states, 37 states have (on average 9.432432432432432) internal successors, (349), 37 states have internal predecessors, (349), 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 15:48:03,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:03,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:48:03,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:10,857 INFO L124 PetriNetUnfolderBase]: 4251/7453 cut-off events. [2024-01-27 15:48:10,857 INFO L125 PetriNetUnfolderBase]: For 40314/40406 co-relation queries the response was YES. [2024-01-27 15:48:10,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34387 conditions, 7453 events. 4251/7453 cut-off events. For 40314/40406 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 51151 event pairs, 1106 based on Foata normal form. 59/7473 useless extension candidates. Maximal degree in co-relation 34338. Up to 1420 conditions per place. [2024-01-27 15:48:10,907 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 336 selfloop transitions, 105 changer transitions 77/534 dead transitions. [2024-01-27 15:48:10,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 534 transitions, 4896 flow [2024-01-27 15:48:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-01-27 15:48:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-01-27 15:48:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 726 transitions. [2024-01-27 15:48:10,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44594594594594594 [2024-01-27 15:48:10,910 INFO L175 Difference]: Start difference. First operand has 115 places, 125 transitions, 1402 flow. Second operand 44 states and 726 transitions. [2024-01-27 15:48:10,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 534 transitions, 4896 flow [2024-01-27 15:48:10,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 534 transitions, 4796 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-01-27 15:48:10,992 INFO L231 Difference]: Finished difference. Result has 160 places, 186 transitions, 2285 flow [2024-01-27 15:48:10,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=2285, PETRI_PLACES=160, PETRI_TRANSITIONS=186} [2024-01-27 15:48:10,993 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 120 predicate places. [2024-01-27 15:48:10,993 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 186 transitions, 2285 flow [2024-01-27 15:48:10,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 9.432432432432432) internal successors, (349), 37 states have internal predecessors, (349), 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 15:48:10,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:10,993 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:48:11,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-27 15:48:11,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:11,200 INFO L420 AbstractCegarLoop]: === Iteration 20 === 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 15:48:11,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:11,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1630559081, now seen corresponding path program 2 times [2024-01-27 15:48:11,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:11,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090002078] [2024-01-27 15:48:11,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:11,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:13,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:13,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090002078] [2024-01-27 15:48:13,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090002078] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:13,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100166646] [2024-01-27 15:48:13,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:48:13,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:13,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:13,212 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:48:13,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 15:48:13,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:48:13,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:48:13,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 15:48:13,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:13,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:48:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:13,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:14,541 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 117 treesize of output 105 [2024-01-27 15:48:14,568 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-27 15:48:14,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 217 treesize of output 162 [2024-01-27 15:48:14,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:14,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100166646] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:14,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:14,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2024-01-27 15:48:14,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172384043] [2024-01-27 15:48:14,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:14,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-01-27 15:48:14,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:14,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-01-27 15:48:14,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2024-01-27 15:48:14,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:48:14,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 186 transitions, 2285 flow. Second operand has 35 states, 35 states have (on average 9.571428571428571) internal successors, (335), 35 states have internal predecessors, (335), 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 15:48:14,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:14,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:48:14,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:22,998 INFO L124 PetriNetUnfolderBase]: 5863/10202 cut-off events. [2024-01-27 15:48:22,998 INFO L125 PetriNetUnfolderBase]: For 75057/75195 co-relation queries the response was YES. [2024-01-27 15:48:23,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51200 conditions, 10202 events. 5863/10202 cut-off events. For 75057/75195 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 73326 event pairs, 1182 based on Foata normal form. 99/10264 useless extension candidates. Maximal degree in co-relation 51131. Up to 1435 conditions per place. [2024-01-27 15:48:23,078 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 417 selfloop transitions, 162 changer transitions 44/639 dead transitions. [2024-01-27 15:48:23,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 639 transitions, 6620 flow [2024-01-27 15:48:23,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-01-27 15:48:23,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-01-27 15:48:23,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 808 transitions. [2024-01-27 15:48:23,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45495495495495497 [2024-01-27 15:48:23,081 INFO L175 Difference]: Start difference. First operand has 160 places, 186 transitions, 2285 flow. Second operand 48 states and 808 transitions. [2024-01-27 15:48:23,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 639 transitions, 6620 flow [2024-01-27 15:48:23,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 639 transitions, 6262 flow, removed 118 selfloop flow, removed 20 redundant places. [2024-01-27 15:48:23,346 INFO L231 Difference]: Finished difference. Result has 196 places, 259 transitions, 3521 flow [2024-01-27 15:48:23,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2046, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=3521, PETRI_PLACES=196, PETRI_TRANSITIONS=259} [2024-01-27 15:48:23,347 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 156 predicate places. [2024-01-27 15:48:23,347 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 259 transitions, 3521 flow [2024-01-27 15:48:23,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 9.571428571428571) internal successors, (335), 35 states have internal predecessors, (335), 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 15:48:23,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:23,347 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:48:23,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-27 15:48:23,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:23,549 INFO L420 AbstractCegarLoop]: === Iteration 21 === 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 15:48:23,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:23,549 INFO L85 PathProgramCache]: Analyzing trace with hash -2100635233, now seen corresponding path program 3 times [2024-01-27 15:48:23,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:23,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649478539] [2024-01-27 15:48:23,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:23,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:24,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:24,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649478539] [2024-01-27 15:48:24,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649478539] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:24,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613051853] [2024-01-27 15:48:24,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:48:24,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:24,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:24,376 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:48:24,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-27 15:48:24,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:48:24,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:48:24,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 15:48:24,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:24,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:48:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:24,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:25,712 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 78 treesize of output 70 [2024-01-27 15:48:25,740 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-27 15:48:25,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 163 treesize of output 134 [2024-01-27 15:48:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:25,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613051853] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:25,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:25,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-01-27 15:48:25,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109859797] [2024-01-27 15:48:25,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:25,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-27 15:48:25,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:25,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-27 15:48:25,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2024-01-27 15:48:25,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:48:25,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 259 transitions, 3521 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 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 15:48:25,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:25,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:48:25,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:30,212 INFO L124 PetriNetUnfolderBase]: 6451/11322 cut-off events. [2024-01-27 15:48:30,213 INFO L125 PetriNetUnfolderBase]: For 92111/92264 co-relation queries the response was YES. [2024-01-27 15:48:30,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58082 conditions, 11322 events. 6451/11322 cut-off events. For 92111/92264 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 83724 event pairs, 1620 based on Foata normal form. 111/11394 useless extension candidates. Maximal degree in co-relation 58002. Up to 1647 conditions per place. [2024-01-27 15:48:30,298 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 383 selfloop transitions, 132 changer transitions 56/587 dead transitions. [2024-01-27 15:48:30,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 587 transitions, 6612 flow [2024-01-27 15:48:30,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-01-27 15:48:30,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-01-27 15:48:30,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 611 transitions. [2024-01-27 15:48:30,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587087087087087 [2024-01-27 15:48:30,301 INFO L175 Difference]: Start difference. First operand has 196 places, 259 transitions, 3521 flow. Second operand 36 states and 611 transitions. [2024-01-27 15:48:30,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 587 transitions, 6612 flow [2024-01-27 15:48:30,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 587 transitions, 6070 flow, removed 224 selfloop flow, removed 20 redundant places. [2024-01-27 15:48:30,741 INFO L231 Difference]: Finished difference. Result has 220 places, 278 transitions, 3603 flow [2024-01-27 15:48:30,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3070, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=3603, PETRI_PLACES=220, PETRI_TRANSITIONS=278} [2024-01-27 15:48:30,741 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 180 predicate places. [2024-01-27 15:48:30,741 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 278 transitions, 3603 flow [2024-01-27 15:48:30,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 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 15:48:30,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:30,742 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:48:30,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-27 15:48:30,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-01-27 15:48:30,942 INFO L420 AbstractCegarLoop]: === Iteration 22 === 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 15:48:30,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:30,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1508319097, now seen corresponding path program 4 times [2024-01-27 15:48:30,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:30,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100042063] [2024-01-27 15:48:30,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:30,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:33,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:33,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100042063] [2024-01-27 15:48:33,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100042063] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:33,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488349404] [2024-01-27 15:48:33,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:48:33,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:33,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:33,013 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:48:33,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-27 15:48:33,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:48:33,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:48:33,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 36 conjunts are in the unsatisfiable core [2024-01-27 15:48:33,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:33,202 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 15:48:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:33,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:34,300 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 117 treesize of output 105 [2024-01-27 15:48:34,330 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-27 15:48:34,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 217 treesize of output 162 [2024-01-27 15:48:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:34,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488349404] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:34,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:34,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2024-01-27 15:48:34,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250302608] [2024-01-27 15:48:34,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:34,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-01-27 15:48:34,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:34,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-01-27 15:48:34,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2024-01-27 15:48:34,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:48:34,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 278 transitions, 3603 flow. Second operand has 37 states, 37 states have (on average 9.405405405405405) internal successors, (348), 37 states have internal predecessors, (348), 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 15:48:34,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:34,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:48:34,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:45,494 INFO L124 PetriNetUnfolderBase]: 6783/12016 cut-off events. [2024-01-27 15:48:45,494 INFO L125 PetriNetUnfolderBase]: For 81860/81974 co-relation queries the response was YES. [2024-01-27 15:48:45,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58438 conditions, 12016 events. 6783/12016 cut-off events. For 81860/81974 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 90217 event pairs, 1496 based on Foata normal form. 83/12070 useless extension candidates. Maximal degree in co-relation 58345. Up to 1639 conditions per place. [2024-01-27 15:48:45,615 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 442 selfloop transitions, 168 changer transitions 61/687 dead transitions. [2024-01-27 15:48:45,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 687 transitions, 7140 flow [2024-01-27 15:48:45,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-01-27 15:48:45,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-01-27 15:48:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 845 transitions. [2024-01-27 15:48:45,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.447800741918389 [2024-01-27 15:48:45,617 INFO L175 Difference]: Start difference. First operand has 220 places, 278 transitions, 3603 flow. Second operand 51 states and 845 transitions. [2024-01-27 15:48:45,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 687 transitions, 7140 flow [2024-01-27 15:48:46,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 687 transitions, 6908 flow, removed 28 selfloop flow, removed 23 redundant places. [2024-01-27 15:48:46,276 INFO L231 Difference]: Finished difference. Result has 251 places, 288 transitions, 3892 flow [2024-01-27 15:48:46,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3418, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=3892, PETRI_PLACES=251, PETRI_TRANSITIONS=288} [2024-01-27 15:48:46,276 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 211 predicate places. [2024-01-27 15:48:46,276 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 288 transitions, 3892 flow [2024-01-27 15:48:46,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 9.405405405405405) internal successors, (348), 37 states have internal predecessors, (348), 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 15:48:46,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:46,277 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:48:46,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-27 15:48:46,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:46,477 INFO L420 AbstractCegarLoop]: === Iteration 23 === 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 15:48:46,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:46,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1944897501, now seen corresponding path program 5 times [2024-01-27 15:48:46,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:46,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187770093] [2024-01-27 15:48:46,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:46,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:47,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:47,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:47,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187770093] [2024-01-27 15:48:47,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187770093] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:47,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010538470] [2024-01-27 15:48:47,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:48:47,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:47,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:47,364 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:48:47,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-27 15:48:47,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:48:47,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:48:47,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 15:48:47,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:47,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:48:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:47,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:48,715 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 78 treesize of output 70 [2024-01-27 15:48:48,742 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-27 15:48:48,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 167 treesize of output 138 [2024-01-27 15:48:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:48,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010538470] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:48,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:48,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-01-27 15:48:48,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640165962] [2024-01-27 15:48:48,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:48,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-27 15:48:48,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:48,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-27 15:48:48,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2024-01-27 15:48:49,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:48:49,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 288 transitions, 3892 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 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 15:48:49,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:49,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:48:49,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:53,740 INFO L124 PetriNetUnfolderBase]: 6891/12203 cut-off events. [2024-01-27 15:48:53,740 INFO L125 PetriNetUnfolderBase]: For 87416/87558 co-relation queries the response was YES. [2024-01-27 15:48:53,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60624 conditions, 12203 events. 6891/12203 cut-off events. For 87416/87558 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 92215 event pairs, 1340 based on Foata normal form. 102/12268 useless extension candidates. Maximal degree in co-relation 60527. Up to 1703 conditions per place. [2024-01-27 15:48:53,860 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 377 selfloop transitions, 164 changer transitions 56/613 dead transitions. [2024-01-27 15:48:53,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 613 transitions, 6869 flow [2024-01-27 15:48:53,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-01-27 15:48:53,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-01-27 15:48:53,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 655 transitions. [2024-01-27 15:48:53,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4539154539154539 [2024-01-27 15:48:53,862 INFO L175 Difference]: Start difference. First operand has 251 places, 288 transitions, 3892 flow. Second operand 39 states and 655 transitions. [2024-01-27 15:48:53,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 613 transitions, 6869 flow [2024-01-27 15:48:54,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 613 transitions, 6515 flow, removed 37 selfloop flow, removed 39 redundant places. [2024-01-27 15:48:54,290 INFO L231 Difference]: Finished difference. Result has 253 places, 297 transitions, 4067 flow [2024-01-27 15:48:54,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3581, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4067, PETRI_PLACES=253, PETRI_TRANSITIONS=297} [2024-01-27 15:48:54,291 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 213 predicate places. [2024-01-27 15:48:54,291 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 297 transitions, 4067 flow [2024-01-27 15:48:54,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 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 15:48:54,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:54,291 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:48:54,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-01-27 15:48:54,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:54,492 INFO L420 AbstractCegarLoop]: === Iteration 24 === 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 15:48:54,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:54,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1419577169, now seen corresponding path program 6 times [2024-01-27 15:48:54,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:54,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025861163] [2024-01-27 15:48:54,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:54,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:54,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:56,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:56,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025861163] [2024-01-27 15:48:56,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025861163] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:56,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026731895] [2024-01-27 15:48:56,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:48:56,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:56,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:56,570 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:48:56,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-27 15:48:56,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:48:56,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:48:56,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 36 conjunts are in the unsatisfiable core [2024-01-27 15:48:56,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:56,736 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 15:48:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:57,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:57,894 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 78 treesize of output 70 [2024-01-27 15:48:57,929 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-27 15:48:57,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 163 treesize of output 134 [2024-01-27 15:48:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:58,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026731895] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:58,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:58,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-01-27 15:48:58,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744822244] [2024-01-27 15:48:58,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:58,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-27 15:48:58,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:58,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-27 15:48:58,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1179, Unknown=0, NotChecked=0, Total=1406 [2024-01-27 15:48:58,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:48:58,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 297 transitions, 4067 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 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 15:48:58,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:58,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:48:58,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:05,435 INFO L124 PetriNetUnfolderBase]: 7191/12756 cut-off events. [2024-01-27 15:49:05,435 INFO L125 PetriNetUnfolderBase]: For 92731/92855 co-relation queries the response was YES. [2024-01-27 15:49:05,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63418 conditions, 12756 events. 7191/12756 cut-off events. For 92731/92855 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 97205 event pairs, 2162 based on Foata normal form. 91/12805 useless extension candidates. Maximal degree in co-relation 63319. Up to 1838 conditions per place. [2024-01-27 15:49:05,543 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 391 selfloop transitions, 154 changer transitions 84/645 dead transitions. [2024-01-27 15:49:05,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 645 transitions, 7235 flow [2024-01-27 15:49:05,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-01-27 15:49:05,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-01-27 15:49:05,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 737 transitions. [2024-01-27 15:49:05,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43301997649823737 [2024-01-27 15:49:05,546 INFO L175 Difference]: Start difference. First operand has 253 places, 297 transitions, 4067 flow. Second operand 46 states and 737 transitions. [2024-01-27 15:49:05,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 645 transitions, 7235 flow [2024-01-27 15:49:05,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 645 transitions, 6995 flow, removed 24 selfloop flow, removed 25 redundant places. [2024-01-27 15:49:05,947 INFO L231 Difference]: Finished difference. Result has 278 places, 308 transitions, 4316 flow [2024-01-27 15:49:05,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3861, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=4316, PETRI_PLACES=278, PETRI_TRANSITIONS=308} [2024-01-27 15:49:05,947 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 238 predicate places. [2024-01-27 15:49:05,948 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 308 transitions, 4316 flow [2024-01-27 15:49:05,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 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 15:49:05,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:05,948 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:05,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:06,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-01-27 15:49:06,148 INFO L420 AbstractCegarLoop]: === Iteration 25 === 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 15:49:06,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:06,149 INFO L85 PathProgramCache]: Analyzing trace with hash 50591783, now seen corresponding path program 7 times [2024-01-27 15:49:06,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:06,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675344622] [2024-01-27 15:49:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:06,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:07,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:07,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675344622] [2024-01-27 15:49:07,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675344622] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:07,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134793779] [2024-01-27 15:49:07,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:49:07,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:07,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:07,492 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:49:07,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-27 15:49:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:07,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 15:49:07,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:07,679 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 15:49:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:08,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:09,617 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 81 treesize of output 73 [2024-01-27 15:49:09,655 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-01-27 15:49:09,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 174 treesize of output 160 [2024-01-27 15:49:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:11,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134793779] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:11,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:11,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-01-27 15:49:11,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111008031] [2024-01-27 15:49:11,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:11,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-27 15:49:11,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:11,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-27 15:49:11,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2024-01-27 15:49:11,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:49:11,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 308 transitions, 4316 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 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 15:49:11,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:11,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:49:11,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:23,531 INFO L124 PetriNetUnfolderBase]: 7440/13109 cut-off events. [2024-01-27 15:49:23,532 INFO L125 PetriNetUnfolderBase]: For 100234/100379 co-relation queries the response was YES. [2024-01-27 15:49:23,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66500 conditions, 13109 events. 7440/13109 cut-off events. For 100234/100379 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 99863 event pairs, 2948 based on Foata normal form. 104/13149 useless extension candidates. Maximal degree in co-relation 66395. Up to 5880 conditions per place. [2024-01-27 15:49:23,642 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 361 selfloop transitions, 94 changer transitions 50/521 dead transitions. [2024-01-27 15:49:23,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 521 transitions, 6436 flow [2024-01-27 15:49:23,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 15:49:23,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 15:49:23,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 446 transitions. [2024-01-27 15:49:23,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44644644644644643 [2024-01-27 15:49:23,654 INFO L175 Difference]: Start difference. First operand has 278 places, 308 transitions, 4316 flow. Second operand 27 states and 446 transitions. [2024-01-27 15:49:23,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 521 transitions, 6436 flow [2024-01-27 15:49:24,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 521 transitions, 6145 flow, removed 43 selfloop flow, removed 35 redundant places. [2024-01-27 15:49:24,123 INFO L231 Difference]: Finished difference. Result has 268 places, 321 transitions, 4483 flow [2024-01-27 15:49:24,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=4071, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4483, PETRI_PLACES=268, PETRI_TRANSITIONS=321} [2024-01-27 15:49:24,124 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 228 predicate places. [2024-01-27 15:49:24,124 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 321 transitions, 4483 flow [2024-01-27 15:49:24,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 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 15:49:24,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:24,124 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:24,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:24,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:24,325 INFO L420 AbstractCegarLoop]: === Iteration 26 === 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 15:49:24,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:24,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1691705263, now seen corresponding path program 8 times [2024-01-27 15:49:24,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:24,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232462316] [2024-01-27 15:49:24,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:24,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:26,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:26,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232462316] [2024-01-27 15:49:26,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232462316] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:26,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522267910] [2024-01-27 15:49:26,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:49:26,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:26,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:26,238 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:49:26,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-27 15:49:26,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:49:26,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:26,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:49:26,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:26,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:49:26,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:49:26,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 40 [2024-01-27 15:49:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:26,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:27,633 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 78 treesize of output 70 [2024-01-27 15:49:27,663 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-27 15:49:27,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 163 treesize of output 134 [2024-01-27 15:49:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:27,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522267910] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:27,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:27,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2024-01-27 15:49:27,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125381266] [2024-01-27 15:49:27,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:27,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-01-27 15:49:27,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:27,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-01-27 15:49:27,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1159, Unknown=0, NotChecked=0, Total=1332 [2024-01-27 15:49:27,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:49:27,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 321 transitions, 4483 flow. Second operand has 37 states, 37 states have (on average 9.405405405405405) internal successors, (348), 37 states have internal predecessors, (348), 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 15:49:27,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:27,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:49:27,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:34,991 INFO L124 PetriNetUnfolderBase]: 7645/13548 cut-off events. [2024-01-27 15:49:34,991 INFO L125 PetriNetUnfolderBase]: For 99041/99179 co-relation queries the response was YES. [2024-01-27 15:49:35,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68169 conditions, 13548 events. 7645/13548 cut-off events. For 99041/99179 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 104256 event pairs, 2375 based on Foata normal form. 101/13591 useless extension candidates. Maximal degree in co-relation 68070. Up to 2122 conditions per place. [2024-01-27 15:49:35,138 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 394 selfloop transitions, 154 changer transitions 85/649 dead transitions. [2024-01-27 15:49:35,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 649 transitions, 7458 flow [2024-01-27 15:49:35,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-01-27 15:49:35,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-01-27 15:49:35,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 701 transitions. [2024-01-27 15:49:35,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305896805896806 [2024-01-27 15:49:35,140 INFO L175 Difference]: Start difference. First operand has 268 places, 321 transitions, 4483 flow. Second operand 44 states and 701 transitions. [2024-01-27 15:49:35,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 649 transitions, 7458 flow [2024-01-27 15:49:35,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 649 transitions, 7313 flow, removed 21 selfloop flow, removed 18 redundant places. [2024-01-27 15:49:35,717 INFO L231 Difference]: Finished difference. Result has 299 places, 328 transitions, 4830 flow [2024-01-27 15:49:35,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=4367, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=4830, PETRI_PLACES=299, PETRI_TRANSITIONS=328} [2024-01-27 15:49:35,717 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 259 predicate places. [2024-01-27 15:49:35,717 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 328 transitions, 4830 flow [2024-01-27 15:49:35,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 9.405405405405405) internal successors, (348), 37 states have internal predecessors, (348), 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 15:49:35,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:35,718 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:35,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:35,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:35,918 INFO L420 AbstractCegarLoop]: === Iteration 27 === 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 15:49:35,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:35,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1228087645, now seen corresponding path program 9 times [2024-01-27 15:49:35,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:35,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915461011] [2024-01-27 15:49:35,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:35,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:37,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:37,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915461011] [2024-01-27 15:49:37,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915461011] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:37,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878891974] [2024-01-27 15:49:37,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:49:37,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:37,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:37,736 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:49:37,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-27 15:49:37,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:49:37,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:37,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:49:37,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:37,925 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 15:49:38,325 INFO L349 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2024-01-27 15:49:38,325 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 68 treesize of output 38 [2024-01-27 15:49:38,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:38,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:40,279 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 81 treesize of output 73 [2024-01-27 15:49:40,336 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-01-27 15:49:40,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 174 treesize of output 160 [2024-01-27 15:49:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:42,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878891974] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:42,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:42,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-01-27 15:49:42,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642905277] [2024-01-27 15:49:42,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:42,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-27 15:49:42,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:42,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-27 15:49:42,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2024-01-27 15:49:42,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:49:42,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 328 transitions, 4830 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 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 15:49:42,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:42,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:49:42,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:48,198 INFO L124 PetriNetUnfolderBase]: 8532/15068 cut-off events. [2024-01-27 15:49:48,198 INFO L125 PetriNetUnfolderBase]: For 122340/122491 co-relation queries the response was YES. [2024-01-27 15:49:48,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78297 conditions, 15068 events. 8532/15068 cut-off events. For 122340/122491 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 117577 event pairs, 3366 based on Foata normal form. 123/15117 useless extension candidates. Maximal degree in co-relation 78187. Up to 5961 conditions per place. [2024-01-27 15:49:48,356 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 373 selfloop transitions, 113 changer transitions 60/562 dead transitions. [2024-01-27 15:49:48,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 562 transitions, 7476 flow [2024-01-27 15:49:48,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-27 15:49:48,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-27 15:49:48,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 434 transitions. [2024-01-27 15:49:48,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45114345114345117 [2024-01-27 15:49:48,357 INFO L175 Difference]: Start difference. First operand has 299 places, 328 transitions, 4830 flow. Second operand 26 states and 434 transitions. [2024-01-27 15:49:48,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 562 transitions, 7476 flow [2024-01-27 15:49:49,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 562 transitions, 7168 flow, removed 28 selfloop flow, removed 33 redundant places. [2024-01-27 15:49:49,647 INFO L231 Difference]: Finished difference. Result has 298 places, 364 transitions, 5535 flow [2024-01-27 15:49:49,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=4583, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5535, PETRI_PLACES=298, PETRI_TRANSITIONS=364} [2024-01-27 15:49:49,648 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 258 predicate places. [2024-01-27 15:49:49,648 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 364 transitions, 5535 flow [2024-01-27 15:49:49,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 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 15:49:49,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:49,649 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:49,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:49,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:49,861 INFO L420 AbstractCegarLoop]: === Iteration 28 === 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 15:49:49,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:49,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1920731163, now seen corresponding path program 10 times [2024-01-27 15:49:49,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:49,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233752371] [2024-01-27 15:49:49,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:49,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:50,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:50,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233752371] [2024-01-27 15:49:50,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233752371] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:50,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256386752] [2024-01-27 15:49:50,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:49:50,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:50,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:50,833 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:49:50,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-27 15:49:50,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:49:50,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:50,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 15:49:50,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:51,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:49:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:51,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:52,306 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 78 treesize of output 70 [2024-01-27 15:49:52,338 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-27 15:49:52,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 167 treesize of output 138 [2024-01-27 15:49:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:52,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256386752] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:52,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:52,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-01-27 15:49:52,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554798495] [2024-01-27 15:49:52,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:52,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-27 15:49:52,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:52,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-27 15:49:52,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2024-01-27 15:49:52,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:49:52,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 364 transitions, 5535 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 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 15:49:52,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:52,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:49:52,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:01,911 INFO L124 PetriNetUnfolderBase]: 10485/18477 cut-off events. [2024-01-27 15:50:01,911 INFO L125 PetriNetUnfolderBase]: For 152576/152781 co-relation queries the response was YES. [2024-01-27 15:50:02,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98736 conditions, 18477 events. 10485/18477 cut-off events. For 152576/152781 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 147747 event pairs, 2004 based on Foata normal form. 126/18487 useless extension candidates. Maximal degree in co-relation 98604. Up to 2535 conditions per place. [2024-01-27 15:50:02,134 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 499 selfloop transitions, 275 changer transitions 77/867 dead transitions. [2024-01-27 15:50:02,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 867 transitions, 10908 flow [2024-01-27 15:50:02,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-01-27 15:50:02,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2024-01-27 15:50:02,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 879 transitions. [2024-01-27 15:50:02,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482406935237124 [2024-01-27 15:50:02,139 INFO L175 Difference]: Start difference. First operand has 298 places, 364 transitions, 5535 flow. Second operand 53 states and 879 transitions. [2024-01-27 15:50:02,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 867 transitions, 10908 flow [2024-01-27 15:50:03,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 867 transitions, 10751 flow, removed 74 selfloop flow, removed 10 redundant places. [2024-01-27 15:50:03,493 INFO L231 Difference]: Finished difference. Result has 357 places, 446 transitions, 7762 flow [2024-01-27 15:50:03,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=5444, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=7762, PETRI_PLACES=357, PETRI_TRANSITIONS=446} [2024-01-27 15:50:03,494 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 317 predicate places. [2024-01-27 15:50:03,494 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 446 transitions, 7762 flow [2024-01-27 15:50:03,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 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 15:50:03,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:03,495 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:03,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:03,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-01-27 15:50:03,705 INFO L420 AbstractCegarLoop]: === Iteration 29 === 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 15:50:03,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:03,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1027153609, now seen corresponding path program 11 times [2024-01-27 15:50:03,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:03,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10845468] [2024-01-27 15:50:03,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:03,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:05,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:05,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10845468] [2024-01-27 15:50:05,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10845468] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:05,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782080375] [2024-01-27 15:50:05,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:50:05,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:05,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:05,870 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:05,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-27 15:50:06,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:50:06,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:06,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 15:50:06,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:06,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:50:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:06,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:07,478 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 78 treesize of output 70 [2024-01-27 15:50:07,509 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-27 15:50:07,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 163 treesize of output 134 [2024-01-27 15:50:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:07,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782080375] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:07,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:07,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-01-27 15:50:07,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034784321] [2024-01-27 15:50:07,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:07,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-27 15:50:07,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:07,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-27 15:50:07,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2024-01-27 15:50:07,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:50:07,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 446 transitions, 7762 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 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 15:50:07,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:07,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:50:07,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:17,294 INFO L124 PetriNetUnfolderBase]: 11111/19442 cut-off events. [2024-01-27 15:50:17,294 INFO L125 PetriNetUnfolderBase]: For 195190/195442 co-relation queries the response was YES. [2024-01-27 15:50:17,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109592 conditions, 19442 events. 11111/19442 cut-off events. For 195190/195442 co-relation queries the response was YES. Maximal size of possible extension queue 941. Compared 155999 event pairs, 3457 based on Foata normal form. 178/19500 useless extension candidates. Maximal degree in co-relation 109434. Up to 2858 conditions per place. [2024-01-27 15:50:17,528 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 439 selfloop transitions, 257 changer transitions 84/796 dead transitions. [2024-01-27 15:50:17,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 796 transitions, 11517 flow [2024-01-27 15:50:17,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-01-27 15:50:17,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-01-27 15:50:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 703 transitions. [2024-01-27 15:50:17,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-01-27 15:50:17,530 INFO L175 Difference]: Start difference. First operand has 357 places, 446 transitions, 7762 flow. Second operand 44 states and 703 transitions. [2024-01-27 15:50:17,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 796 transitions, 11517 flow [2024-01-27 15:50:18,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 796 transitions, 11115 flow, removed 123 selfloop flow, removed 19 redundant places. [2024-01-27 15:50:18,974 INFO L231 Difference]: Finished difference. Result has 389 places, 479 transitions, 8617 flow [2024-01-27 15:50:18,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=7421, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=8617, PETRI_PLACES=389, PETRI_TRANSITIONS=479} [2024-01-27 15:50:18,974 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 349 predicate places. [2024-01-27 15:50:18,974 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 479 transitions, 8617 flow [2024-01-27 15:50:18,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 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 15:50:18,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:18,975 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:18,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-01-27 15:50:19,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-27 15:50:19,177 INFO L420 AbstractCegarLoop]: === Iteration 30 === 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 15:50:19,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:19,177 INFO L85 PathProgramCache]: Analyzing trace with hash 2008985859, now seen corresponding path program 12 times [2024-01-27 15:50:19,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:19,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982448383] [2024-01-27 15:50:19,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:19,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:21,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:21,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982448383] [2024-01-27 15:50:21,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982448383] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:21,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703892113] [2024-01-27 15:50:21,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:50:21,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:21,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:21,257 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:21,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-27 15:50:21,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:50:21,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:21,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 15:50:21,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:21,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:50:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:21,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:22,782 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 80 treesize of output 72 [2024-01-27 15:50:22,814 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-27 15:50:22,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 173 treesize of output 144 [2024-01-27 15:50:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:23,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703892113] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:23,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:23,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2024-01-27 15:50:23,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382105297] [2024-01-27 15:50:23,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:23,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-01-27 15:50:23,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:23,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-01-27 15:50:23,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2024-01-27 15:50:23,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:50:23,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 479 transitions, 8617 flow. Second operand has 36 states, 36 states have (on average 9.5) internal successors, (342), 36 states have internal predecessors, (342), 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 15:50:23,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:23,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:50:23,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:32,767 INFO L124 PetriNetUnfolderBase]: 11292/19807 cut-off events. [2024-01-27 15:50:32,767 INFO L125 PetriNetUnfolderBase]: For 212348/212600 co-relation queries the response was YES. [2024-01-27 15:50:32,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112284 conditions, 19807 events. 11292/19807 cut-off events. For 212348/212600 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 159634 event pairs, 3252 based on Foata normal form. 178/19865 useless extension candidates. Maximal degree in co-relation 112120. Up to 2731 conditions per place. [2024-01-27 15:50:32,999 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 464 selfloop transitions, 260 changer transitions 54/794 dead transitions. [2024-01-27 15:50:32,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 794 transitions, 11961 flow [2024-01-27 15:50:33,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-01-27 15:50:33,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-01-27 15:50:33,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 678 transitions. [2024-01-27 15:50:33,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44693473961766644 [2024-01-27 15:50:33,001 INFO L175 Difference]: Start difference. First operand has 389 places, 479 transitions, 8617 flow. Second operand 41 states and 678 transitions. [2024-01-27 15:50:33,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 794 transitions, 11961 flow [2024-01-27 15:50:34,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 794 transitions, 11620 flow, removed 98 selfloop flow, removed 24 redundant places. [2024-01-27 15:50:34,591 INFO L231 Difference]: Finished difference. Result has 403 places, 487 transitions, 9023 flow [2024-01-27 15:50:34,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=8316, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=9023, PETRI_PLACES=403, PETRI_TRANSITIONS=487} [2024-01-27 15:50:34,592 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 363 predicate places. [2024-01-27 15:50:34,592 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 487 transitions, 9023 flow [2024-01-27 15:50:34,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 9.5) internal successors, (342), 36 states have internal predecessors, (342), 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 15:50:34,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:34,592 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:34,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:34,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:34,793 INFO L420 AbstractCegarLoop]: === Iteration 31 === 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 15:50:34,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:34,793 INFO L85 PathProgramCache]: Analyzing trace with hash -964848913, now seen corresponding path program 13 times [2024-01-27 15:50:34,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:34,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340072952] [2024-01-27 15:50:34,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:34,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:35,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:35,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340072952] [2024-01-27 15:50:35,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340072952] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:35,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762969372] [2024-01-27 15:50:35,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:50:35,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:35,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:35,702 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:35,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-27 15:50:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:35,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:50:35,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:36,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:36,257 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:50:36,258 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 60 treesize of output 62 [2024-01-27 15:51:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:51:07,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762969372] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:07,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:07,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2024-01-27 15:51:07,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461189551] [2024-01-27 15:51:07,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:07,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:51:07,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:07,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:51:07,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=666, Unknown=6, NotChecked=0, Total=756 [2024-01-27 15:51:07,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:51:07,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 487 transitions, 9023 flow. Second operand has 28 states, 28 states have (on average 9.75) internal successors, (273), 28 states have internal predecessors, (273), 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 15:51:07,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:07,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:51:07,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:51:13,461 INFO L124 PetriNetUnfolderBase]: 12883/22387 cut-off events. [2024-01-27 15:51:13,461 INFO L125 PetriNetUnfolderBase]: For 257070/257367 co-relation queries the response was YES. [2024-01-27 15:51:13,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128199 conditions, 22387 events. 12883/22387 cut-off events. For 257070/257367 co-relation queries the response was YES. Maximal size of possible extension queue 994. Compared 179598 event pairs, 3619 based on Foata normal form. 218/22469 useless extension candidates. Maximal degree in co-relation 128051. Up to 3589 conditions per place. [2024-01-27 15:51:13,849 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 441 selfloop transitions, 290 changer transitions 76/823 dead transitions. [2024-01-27 15:51:13,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 823 transitions, 13126 flow [2024-01-27 15:51:13,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-27 15:51:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-27 15:51:13,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 578 transitions. [2024-01-27 15:51:13,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4463320463320463 [2024-01-27 15:51:13,851 INFO L175 Difference]: Start difference. First operand has 403 places, 487 transitions, 9023 flow. Second operand 35 states and 578 transitions. [2024-01-27 15:51:13,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 823 transitions, 13126 flow [2024-01-27 15:51:15,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 823 transitions, 12743 flow, removed 27 selfloop flow, removed 31 redundant places. [2024-01-27 15:51:15,667 INFO L231 Difference]: Finished difference. Result has 419 places, 546 transitions, 10568 flow [2024-01-27 15:51:15,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=8697, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=10568, PETRI_PLACES=419, PETRI_TRANSITIONS=546} [2024-01-27 15:51:15,667 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 379 predicate places. [2024-01-27 15:51:15,668 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 546 transitions, 10568 flow [2024-01-27 15:51:15,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 9.75) internal successors, (273), 28 states have internal predecessors, (273), 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 15:51:15,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:51:15,668 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:51:15,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-01-27 15:51:15,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:15,879 INFO L420 AbstractCegarLoop]: === Iteration 32 === 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 15:51:15,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:51:15,879 INFO L85 PathProgramCache]: Analyzing trace with hash 357615075, now seen corresponding path program 14 times [2024-01-27 15:51:15,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:51:15,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343718422] [2024-01-27 15:51:15,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:15,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:51:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:17,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:51:17,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343718422] [2024-01-27 15:51:17,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343718422] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:51:17,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194514778] [2024-01-27 15:51:17,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:51:17,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:17,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:51:17,823 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:51:17,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-27 15:51:17,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:51:17,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:51:17,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 15:51:17,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:51:18,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:51:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:18,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:51:19,632 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 78 treesize of output 70 [2024-01-27 15:51:19,669 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-27 15:51:19,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 167 treesize of output 138 [2024-01-27 15:51:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:19,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194514778] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:19,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:19,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-01-27 15:51:19,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52313500] [2024-01-27 15:51:19,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:19,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-27 15:51:19,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:19,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-27 15:51:19,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2024-01-27 15:51:19,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:51:19,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 546 transitions, 10568 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 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 15:51:19,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:19,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:51:19,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:51:40,882 INFO L124 PetriNetUnfolderBase]: 12885/22535 cut-off events. [2024-01-27 15:51:40,882 INFO L125 PetriNetUnfolderBase]: For 281449/281779 co-relation queries the response was YES. [2024-01-27 15:51:41,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132476 conditions, 22535 events. 12885/22535 cut-off events. For 281449/281779 co-relation queries the response was YES. Maximal size of possible extension queue 1016. Compared 183521 event pairs, 2838 based on Foata normal form. 207/22583 useless extension candidates. Maximal degree in co-relation 132313. Up to 3316 conditions per place. [2024-01-27 15:51:41,398 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 522 selfloop transitions, 347 changer transitions 85/970 dead transitions. [2024-01-27 15:51:41,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 970 transitions, 14811 flow [2024-01-27 15:51:41,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-01-27 15:51:41,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-01-27 15:51:41,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 896 transitions. [2024-01-27 15:51:41,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2024-01-27 15:51:41,400 INFO L175 Difference]: Start difference. First operand has 419 places, 546 transitions, 10568 flow. Second operand 56 states and 896 transitions. [2024-01-27 15:51:41,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 970 transitions, 14811 flow [2024-01-27 15:51:43,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 970 transitions, 14183 flow, removed 106 selfloop flow, removed 17 redundant places. [2024-01-27 15:51:43,503 INFO L231 Difference]: Finished difference. Result has 460 places, 556 transitions, 10847 flow [2024-01-27 15:51:43,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=9987, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=10847, PETRI_PLACES=460, PETRI_TRANSITIONS=556} [2024-01-27 15:51:43,504 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 420 predicate places. [2024-01-27 15:51:43,504 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 556 transitions, 10847 flow [2024-01-27 15:51:43,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 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 15:51:43,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:51:43,504 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:51:43,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-01-27 15:51:43,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:43,707 INFO L420 AbstractCegarLoop]: === Iteration 33 === 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 15:51:43,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:51:43,708 INFO L85 PathProgramCache]: Analyzing trace with hash -979772293, now seen corresponding path program 15 times [2024-01-27 15:51:43,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:51:43,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086604023] [2024-01-27 15:51:43,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:43,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:51:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:45,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:45,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:51:45,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086604023] [2024-01-27 15:51:45,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086604023] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:51:45,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702373557] [2024-01-27 15:51:45,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:51:45,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:45,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:51:45,064 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:51:45,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-27 15:51:45,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:51:45,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:51:45,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 15:51:45,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:51:45,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:51:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:45,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:51:50,845 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 78 treesize of output 70 [2024-01-27 15:51:50,885 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-27 15:51:50,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 167 treesize of output 138 [2024-01-27 15:51:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:51,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702373557] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:51,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:51,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-01-27 15:51:51,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57255767] [2024-01-27 15:51:51,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:51,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-27 15:51:51,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:51,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-27 15:51:51,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1212, Unknown=1, NotChecked=0, Total=1406 [2024-01-27 15:51:51,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:51:51,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 556 transitions, 10847 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 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 15:51:51,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:51,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:51:51,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:52:03,281 WARN L293 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 173 DAG size of output: 124 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:52:21,385 WARN L293 SmtUtils]: Spent 17.93s on a formula simplification. DAG size of input: 118 DAG size of output: 100 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:52:24,594 INFO L124 PetriNetUnfolderBase]: 12893/22557 cut-off events. [2024-01-27 15:52:24,594 INFO L125 PetriNetUnfolderBase]: For 302194/302546 co-relation queries the response was YES. [2024-01-27 15:52:25,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131803 conditions, 22557 events. 12893/22557 cut-off events. For 302194/302546 co-relation queries the response was YES. Maximal size of possible extension queue 1017. Compared 183672 event pairs, 3413 based on Foata normal form. 213/22596 useless extension candidates. Maximal degree in co-relation 131631. Up to 3534 conditions per place. [2024-01-27 15:52:25,336 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 496 selfloop transitions, 281 changer transitions 56/849 dead transitions. [2024-01-27 15:52:25,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 849 transitions, 14145 flow [2024-01-27 15:52:25,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-27 15:52:25,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-27 15:52:25,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 609 transitions. [2024-01-27 15:52:25,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44485025566106645 [2024-01-27 15:52:25,337 INFO L175 Difference]: Start difference. First operand has 460 places, 556 transitions, 10847 flow. Second operand 37 states and 609 transitions. [2024-01-27 15:52:25,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 849 transitions, 14145 flow [2024-01-27 15:52:27,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 849 transitions, 13367 flow, removed 77 selfloop flow, removed 45 redundant places. [2024-01-27 15:52:27,428 INFO L231 Difference]: Finished difference. Result has 450 places, 559 transitions, 10800 flow [2024-01-27 15:52:27,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=10145, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=10800, PETRI_PLACES=450, PETRI_TRANSITIONS=559} [2024-01-27 15:52:27,429 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 410 predicate places. [2024-01-27 15:52:27,429 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 559 transitions, 10800 flow [2024-01-27 15:52:27,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 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 15:52:27,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:52:27,430 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:52:27,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-01-27 15:52:27,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-01-27 15:52:27,637 INFO L420 AbstractCegarLoop]: === Iteration 34 === 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 15:52:27,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:52:27,637 INFO L85 PathProgramCache]: Analyzing trace with hash 195146297, now seen corresponding path program 16 times [2024-01-27 15:52:27,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:52:27,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047410158] [2024-01-27 15:52:27,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:52:27,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:52:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:52:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:28,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:52:28,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047410158] [2024-01-27 15:52:28,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047410158] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:52:28,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026057951] [2024-01-27 15:52:28,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:52:28,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:52:28,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:52:28,564 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:52:28,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-01-27 15:52:28,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:52:28,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:52:28,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 15:52:28,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:52:28,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:52:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:29,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:52:30,219 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 78 treesize of output 70 [2024-01-27 15:52:30,265 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-27 15:52:30,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 171 treesize of output 142 [2024-01-27 15:52:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:30,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026057951] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:52:30,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:52:30,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-01-27 15:52:30,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470361459] [2024-01-27 15:52:30,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:52:30,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-27 15:52:30,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:52:30,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-27 15:52:30,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2024-01-27 15:52:30,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:52:30,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 559 transitions, 10800 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 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 15:52:30,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:52:30,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:52:30,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:52:39,287 INFO L124 PetriNetUnfolderBase]: 13203/23167 cut-off events. [2024-01-27 15:52:39,287 INFO L125 PetriNetUnfolderBase]: For 302341/302687 co-relation queries the response was YES. [2024-01-27 15:52:39,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133447 conditions, 23167 events. 13203/23167 cut-off events. For 302341/302687 co-relation queries the response was YES. Maximal size of possible extension queue 1042. Compared 190244 event pairs, 3509 based on Foata normal form. 206/23197 useless extension candidates. Maximal degree in co-relation 133284. Up to 3316 conditions per place. [2024-01-27 15:52:39,952 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 496 selfloop transitions, 279 changer transitions 49/840 dead transitions. [2024-01-27 15:52:39,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 840 transitions, 14022 flow [2024-01-27 15:52:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-27 15:52:39,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-27 15:52:39,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 573 transitions. [2024-01-27 15:52:39,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44247104247104246 [2024-01-27 15:52:39,954 INFO L175 Difference]: Start difference. First operand has 450 places, 559 transitions, 10800 flow. Second operand 35 states and 573 transitions. [2024-01-27 15:52:39,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 840 transitions, 14022 flow [2024-01-27 15:52:42,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 840 transitions, 13614 flow, removed 32 selfloop flow, removed 27 redundant places. [2024-01-27 15:52:42,317 INFO L231 Difference]: Finished difference. Result has 459 places, 564 transitions, 11081 flow [2024-01-27 15:52:42,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=10436, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=11081, PETRI_PLACES=459, PETRI_TRANSITIONS=564} [2024-01-27 15:52:42,318 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 419 predicate places. [2024-01-27 15:52:42,318 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 564 transitions, 11081 flow [2024-01-27 15:52:42,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 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 15:52:42,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:52:42,319 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:52:42,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-01-27 15:52:42,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-01-27 15:52:42,530 INFO L420 AbstractCegarLoop]: === Iteration 35 === 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 15:52:42,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:52:42,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1475475328, now seen corresponding path program 17 times [2024-01-27 15:52:42,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:52:42,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246976962] [2024-01-27 15:52:42,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:52:42,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:52:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:52:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:43,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:52:43,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246976962] [2024-01-27 15:52:43,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246976962] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:52:43,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870543130] [2024-01-27 15:52:43,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:52:43,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:52:43,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:52:43,850 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:52:43,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-01-27 15:52:44,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:52:44,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:52:44,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:52:44,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:52:44,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:52:44,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:52:44,446 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:52:44,446 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 58 treesize of output 60 [2024-01-27 15:52:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:52:47,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870543130] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:52:47,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:52:47,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 29 [2024-01-27 15:52:47,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197759658] [2024-01-27 15:52:47,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:52:47,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:52:47,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:52:47,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:52:47,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:52:47,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:52:47,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 564 transitions, 11081 flow. Second operand has 30 states, 30 states have (on average 9.833333333333334) internal successors, (295), 30 states have internal predecessors, (295), 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 15:52:47,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:52:47,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:52:47,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand