./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 448d4d75 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.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 c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-448d4d7-m [2024-02-20 11:44:51,362 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-20 11:44:51,417 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-20 11:44:51,423 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-20 11:44:51,424 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-20 11:44:51,449 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-20 11:44:51,450 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-20 11:44:51,450 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-20 11:44:51,451 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-20 11:44:51,455 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-20 11:44:51,455 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-20 11:44:51,455 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-20 11:44:51,456 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-20 11:44:51,457 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-20 11:44:51,457 INFO L153 SettingsManager]: * Use SBE=true [2024-02-20 11:44:51,458 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-20 11:44:51,458 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-20 11:44:51,458 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-20 11:44:51,458 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-20 11:44:51,458 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-20 11:44:51,459 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-20 11:44:51,459 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-20 11:44:51,459 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-20 11:44:51,459 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-20 11:44:51,460 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-20 11:44:51,460 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-20 11:44:51,460 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-20 11:44:51,460 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-20 11:44:51,461 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-20 11:44:51,461 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-20 11:44:51,462 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-20 11:44:51,462 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-20 11:44:51,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:44:51,462 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-20 11:44:51,462 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-20 11:44:51,463 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-20 11:44:51,463 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-20 11:44:51,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-20 11:44:51,463 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-20 11:44:51,463 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-20 11:44:51,464 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-20 11:44:51,464 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-20 11:44:51,464 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-20 11:44:51,464 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-20 11:44:51,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-20 11:44:51,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-20 11:44:51,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-20 11:44:51,686 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-20 11:44:51,687 INFO L274 PluginConnector]: CDTParser initialized [2024-02-20 11:44:51,687 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2024-02-20 11:44:52,756 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-20 11:44:52,913 INFO L384 CDTParser]: Found 1 translation units. [2024-02-20 11:44:52,914 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2024-02-20 11:44:52,919 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/052c9b6ad/ce289cbf8c9543949f48d0769909e24e/FLAGddd3bc1a7 [2024-02-20 11:44:52,930 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/052c9b6ad/ce289cbf8c9543949f48d0769909e24e [2024-02-20 11:44:52,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-20 11:44:52,933 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-20 11:44:52,933 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-20 11:44:52,933 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-20 11:44:52,937 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-20 11:44:52,938 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:44:52" (1/1) ... [2024-02-20 11:44:52,939 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b354a42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:44:52, skipping insertion in model container [2024-02-20 11:44:52,939 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:44:52" (1/1) ... [2024-02-20 11:44:52,956 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-20 11:44:53,080 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/chl-chromosome-symm.wvr.c[2695,2708] [2024-02-20 11:44:53,092 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:44:53,098 INFO L202 MainTranslator]: Completed pre-run [2024-02-20 11:44:53,121 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/chl-chromosome-symm.wvr.c[2695,2708] [2024-02-20 11:44:53,124 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:44:53,140 INFO L206 MainTranslator]: Completed translation [2024-02-20 11:44:53,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:44:53 WrapperNode [2024-02-20 11:44:53,140 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-20 11:44:53,141 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-20 11:44:53,141 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-20 11:44:53,142 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-20 11:44:53,146 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:44:53" (1/1) ... [2024-02-20 11:44:53,152 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:44:53" (1/1) ... [2024-02-20 11:44:53,176 INFO L138 Inliner]: procedures = 25, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 199 [2024-02-20 11:44:53,177 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-20 11:44:53,181 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-20 11:44:53,181 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-20 11:44:53,181 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-20 11:44:53,189 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:44:53" (1/1) ... [2024-02-20 11:44:53,190 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:44:53" (1/1) ... [2024-02-20 11:44:53,192 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:44:53" (1/1) ... [2024-02-20 11:44:53,204 INFO L175 MemorySlicer]: Split 12 memory accesses to 4 slices as follows [2, 2, 6, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 1, 2, 1]. [2024-02-20 11:44:53,209 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:44:53" (1/1) ... [2024-02-20 11:44:53,209 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:44:53" (1/1) ... [2024-02-20 11:44:53,229 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:44:53" (1/1) ... [2024-02-20 11:44:53,232 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:44:53" (1/1) ... [2024-02-20 11:44:53,234 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:44:53" (1/1) ... [2024-02-20 11:44:53,235 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:44:53" (1/1) ... [2024-02-20 11:44:53,250 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-20 11:44:53,251 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-20 11:44:53,251 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-20 11:44:53,251 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-20 11:44:53,252 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:44:53" (1/1) ... [2024-02-20 11:44:53,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:44:53,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:44:53,314 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-20 11:44:53,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-20 11:44:53,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-20 11:44:53,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-20 11:44:53,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-20 11:44:53,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-20 11:44:53,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-20 11:44:53,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-20 11:44:53,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-20 11:44:53,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-20 11:44:53,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-20 11:44:53,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-20 11:44:53,374 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-20 11:44:53,374 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-20 11:44:53,375 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-20 11:44:53,375 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-20 11:44:53,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-20 11:44:53,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-20 11:44:53,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-20 11:44:53,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-20 11:44:53,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-02-20 11:44:53,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-20 11:44:53,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-20 11:44:53,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-20 11:44:53,378 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-20 11:44:53,490 INFO L244 CfgBuilder]: Building ICFG [2024-02-20 11:44:53,492 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-20 11:44:53,783 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-20 11:44:53,784 INFO L293 CfgBuilder]: Performing block encoding [2024-02-20 11:44:54,038 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-20 11:44:54,039 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-02-20 11:44:54,039 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:44:54 BoogieIcfgContainer [2024-02-20 11:44:54,039 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-20 11:44:54,042 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-20 11:44:54,042 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-20 11:44:54,044 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-20 11:44:54,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 11:44:52" (1/3) ... [2024-02-20 11:44:54,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be880fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:44:54, skipping insertion in model container [2024-02-20 11:44:54,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:44:53" (2/3) ... [2024-02-20 11:44:54,047 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be880fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:44:54, skipping insertion in model container [2024-02-20 11:44:54,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:44:54" (3/3) ... [2024-02-20 11:44:54,049 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2024-02-20 11:44:54,064 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-20 11:44:54,065 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-20 11:44:54,065 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-20 11:44:54,110 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-20 11:44:54,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 23 transitions, 60 flow [2024-02-20 11:44:54,174 INFO L124 PetriNetUnfolderBase]: 4/21 cut-off events. [2024-02-20 11:44:54,175 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 11:44:54,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 4/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 11 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2024-02-20 11:44:54,178 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 23 transitions, 60 flow [2024-02-20 11:44:54,184 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 20 transitions, 52 flow [2024-02-20 11:44:54,197 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:44:54,204 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@12ba0bc3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:44:54,204 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-20 11:44:54,214 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:44:54,214 INFO L124 PetriNetUnfolderBase]: 4/19 cut-off events. [2024-02-20 11:44:54,214 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 11:44:54,214 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:44:54,215 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:44:54,215 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:44:54,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:44:54,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1381292058, now seen corresponding path program 1 times [2024-02-20 11:44:54,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:44:54,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552671575] [2024-02-20 11:44:54,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:44:54,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:44:54,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:44:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:44:54,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:44:54,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552671575] [2024-02-20 11:44:54,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552671575] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:44:54,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:44:54,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-20 11:44:54,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844348188] [2024-02-20 11:44:54,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:44:54,539 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 11:44:54,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:44:54,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 11:44:54,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 11:44:54,565 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:44:54,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:44:54,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:44:54,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:44:54,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:44:54,624 INFO L124 PetriNetUnfolderBase]: 42/80 cut-off events. [2024-02-20 11:44:54,625 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-20 11:44:54,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 80 events. 42/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 129 event pairs, 24 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 120. Up to 78 conditions per place. [2024-02-20 11:44:54,628 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 17 selfloop transitions, 4 changer transitions 0/22 dead transitions. [2024-02-20 11:44:54,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 22 transitions, 98 flow [2024-02-20 11:44:54,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 11:44:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 11:44:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 32 transitions. [2024-02-20 11:44:54,637 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.463768115942029 [2024-02-20 11:44:54,640 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-02-20 11:44:54,640 INFO L507 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 98 flow [2024-02-20 11:44:54,641 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:44:54,641 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:44:54,641 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:44:54,641 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-20 11:44:54,641 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:44:54,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:44:54,642 INFO L85 PathProgramCache]: Analyzing trace with hash -2073196592, now seen corresponding path program 1 times [2024-02-20 11:44:54,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:44:54,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140167020] [2024-02-20 11:44:54,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:44:54,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:44:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:44:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 11:44:54,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:44:54,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140167020] [2024-02-20 11:44:54,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140167020] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:44:54,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616721196] [2024-02-20 11:44:54,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:44:54,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:44:54,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:44:54,814 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:44:54,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-20 11:44:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:44:54,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-20 11:44:54,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:44:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 11:44:54,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:44:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 11:44:54,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616721196] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:44:54,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:44:54,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-02-20 11:44:54,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580258964] [2024-02-20 11:44:54,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:44:54,978 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-20 11:44:54,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:44:54,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-20 11:44:54,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-02-20 11:44:54,979 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:44:54,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 98 flow. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:44:54,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:44:54,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:44:54,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:44:55,042 INFO L124 PetriNetUnfolderBase]: 42/86 cut-off events. [2024-02-20 11:44:55,042 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-20 11:44:55,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 86 events. 42/86 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 129 event pairs, 24 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 177. Up to 84 conditions per place. [2024-02-20 11:44:55,043 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 17 selfloop transitions, 10 changer transitions 0/28 dead transitions. [2024-02-20 11:44:55,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 176 flow [2024-02-20 11:44:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-20 11:44:55,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-20 11:44:55,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 51 transitions. [2024-02-20 11:44:55,044 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3695652173913043 [2024-02-20 11:44:55,045 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 7 predicate places. [2024-02-20 11:44:55,045 INFO L507 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 176 flow [2024-02-20 11:44:55,045 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:44:55,045 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:44:55,045 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:44:55,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-20 11:44:55,260 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:44:55,261 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:44:55,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:44:55,261 INFO L85 PathProgramCache]: Analyzing trace with hash 494032558, now seen corresponding path program 2 times [2024-02-20 11:44:55,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:44:55,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866061331] [2024-02-20 11:44:55,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:44:55,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:44:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:44:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-02-20 11:44:55,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:44:55,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866061331] [2024-02-20 11:44:55,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866061331] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:44:55,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59777783] [2024-02-20 11:44:55,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:44:55,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:44:55,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:44:55,405 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:44:55,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-20 11:44:55,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-02-20 11:44:55,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:44:55,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-20 11:44:55,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:44:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-02-20 11:44:55,523 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-20 11:44:55,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59777783] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:44:55,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-20 11:44:55,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-02-20 11:44:55,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931620983] [2024-02-20 11:44:55,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:44:55,524 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 11:44:55,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:44:55,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 11:44:55,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-02-20 11:44:55,525 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:44:55,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:44:55,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:44:55,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:44:55,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:44:55,611 INFO L124 PetriNetUnfolderBase]: 50/100 cut-off events. [2024-02-20 11:44:55,611 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-02-20 11:44:55,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 100 events. 50/100 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 203 event pairs, 2 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 288. Up to 98 conditions per place. [2024-02-20 11:44:55,612 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 34 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2024-02-20 11:44:55,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 332 flow [2024-02-20 11:44:55,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 11:44:55,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 11:44:55,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-02-20 11:44:55,613 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4782608695652174 [2024-02-20 11:44:55,614 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 10 predicate places. [2024-02-20 11:44:55,614 INFO L507 AbstractCegarLoop]: Abstraction has has 33 places, 40 transitions, 332 flow [2024-02-20 11:44:55,614 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:44:55,614 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:44:55,615 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:44:55,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-02-20 11:44:55,831 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-02-20 11:44:55,831 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:44:55,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:44:55,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1057328694, now seen corresponding path program 3 times [2024-02-20 11:44:55,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:44:55,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44892469] [2024-02-20 11:44:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:44:55,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:44:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:44:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-02-20 11:44:55,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:44:55,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44892469] [2024-02-20 11:44:55,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44892469] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:44:55,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628651564] [2024-02-20 11:44:55,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:44:55,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:44:55,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:44:55,964 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:44:55,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-20 11:44:56,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-02-20 11:44:56,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:44:56,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-20 11:44:56,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:44:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-02-20 11:44:56,100 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-20 11:44:56,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628651564] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:44:56,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-20 11:44:56,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-02-20 11:44:56,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728997532] [2024-02-20 11:44:56,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:44:56,124 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 11:44:56,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:44:56,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 11:44:56,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-02-20 11:44:56,125 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:44:56,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 40 transitions, 332 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:44:56,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:44:56,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:44:56,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:44:56,198 INFO L124 PetriNetUnfolderBase]: 56/110 cut-off events. [2024-02-20 11:44:56,199 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-02-20 11:44:56,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 110 events. 56/110 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 220 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 409. Up to 108 conditions per place. [2024-02-20 11:44:56,200 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 44 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2024-02-20 11:44:56,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 523 flow [2024-02-20 11:44:56,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 11:44:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 11:44:56,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2024-02-20 11:44:56,201 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.45652173913043476 [2024-02-20 11:44:56,202 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 13 predicate places. [2024-02-20 11:44:56,202 INFO L507 AbstractCegarLoop]: Abstraction has has 36 places, 51 transitions, 523 flow [2024-02-20 11:44:56,202 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:44:56,202 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:44:56,203 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:44:56,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-20 11:44:56,413 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:44:56,414 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:44:56,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:44:56,414 INFO L85 PathProgramCache]: Analyzing trace with hash 355948800, now seen corresponding path program 1 times [2024-02-20 11:44:56,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:44:56,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514203539] [2024-02-20 11:44:56,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:44:56,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:44:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:44:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-02-20 11:44:56,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:44:56,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514203539] [2024-02-20 11:44:56,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514203539] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:44:56,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300489290] [2024-02-20 11:44:56,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:44:56,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:44:56,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:44:56,518 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:44:56,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-20 11:44:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:44:56,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 11:44:56,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:44:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-02-20 11:44:56,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:44:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-02-20 11:44:56,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300489290] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:44:56,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:44:56,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-02-20 11:44:56,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671080708] [2024-02-20 11:44:56,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:44:56,712 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-20 11:44:56,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:44:56,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-20 11:44:56,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-02-20 11:44:56,713 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:44:56,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 51 transitions, 523 flow. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:44:56,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:44:56,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:44:56,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:44:56,766 INFO L124 PetriNetUnfolderBase]: 56/112 cut-off events. [2024-02-20 11:44:56,766 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-02-20 11:44:56,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 688 conditions, 112 events. 56/112 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 214 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 490. Up to 110 conditions per place. [2024-02-20 11:44:56,767 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 40 selfloop transitions, 12 changer transitions 0/53 dead transitions. [2024-02-20 11:44:56,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 53 transitions, 647 flow [2024-02-20 11:44:56,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-20 11:44:56,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-20 11:44:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 52 transitions. [2024-02-20 11:44:56,769 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.32298136645962733 [2024-02-20 11:44:56,769 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 19 predicate places. [2024-02-20 11:44:56,770 INFO L507 AbstractCegarLoop]: Abstraction has has 42 places, 53 transitions, 647 flow [2024-02-20 11:44:56,770 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:44:56,770 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:44:56,770 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:44:56,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-20 11:44:56,981 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:44:56,982 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:44:56,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:44:56,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1839038306, now seen corresponding path program 2 times [2024-02-20 11:44:56,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:44:56,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275468144] [2024-02-20 11:44:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:44:56,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:44:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:44:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-02-20 11:44:57,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:44:57,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275468144] [2024-02-20 11:44:57,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275468144] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:44:57,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:44:57,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-20 11:44:57,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531740782] [2024-02-20 11:44:57,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:44:57,149 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 11:44:57,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:44:57,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 11:44:57,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-20 11:44:57,150 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:44:57,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 53 transitions, 647 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:44:57,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:44:57,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:44:57,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:44:57,223 INFO L124 PetriNetUnfolderBase]: 88/175 cut-off events. [2024-02-20 11:44:57,223 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-02-20 11:44:57,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1244 conditions, 175 events. 88/175 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 461 event pairs, 0 based on Foata normal form. 4/141 useless extension candidates. Maximal degree in co-relation 939. Up to 172 conditions per place. [2024-02-20 11:44:57,225 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 69 selfloop transitions, 8 changer transitions 6/84 dead transitions. [2024-02-20 11:44:57,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 84 transitions, 1203 flow [2024-02-20 11:44:57,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 11:44:57,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 11:44:57,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 49 transitions. [2024-02-20 11:44:57,226 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.532608695652174 [2024-02-20 11:44:57,226 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 22 predicate places. [2024-02-20 11:44:57,226 INFO L507 AbstractCegarLoop]: Abstraction has has 45 places, 84 transitions, 1203 flow [2024-02-20 11:44:57,226 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:44:57,226 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:44:57,227 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:44:57,227 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-20 11:44:57,227 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:44:57,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:44:57,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1506073622, now seen corresponding path program 3 times [2024-02-20 11:44:57,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:44:57,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521392294] [2024-02-20 11:44:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:44:57,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:44:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:44:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-02-20 11:44:57,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:44:57,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521392294] [2024-02-20 11:44:57,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521392294] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:44:57,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:44:57,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-20 11:44:57,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270824320] [2024-02-20 11:44:57,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:44:57,338 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 11:44:57,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:44:57,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 11:44:57,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-20 11:44:57,339 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:44:57,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 84 transitions, 1203 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:44:57,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:44:57,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:44:57,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:44:57,407 INFO L124 PetriNetUnfolderBase]: 73/145 cut-off events. [2024-02-20 11:44:57,407 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-02-20 11:44:57,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1181 conditions, 145 events. 73/145 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 338 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 874. Up to 143 conditions per place. [2024-02-20 11:44:57,408 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 57 selfloop transitions, 7 changer transitions 6/71 dead transitions. [2024-02-20 11:44:57,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 71 transitions, 1152 flow [2024-02-20 11:44:57,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 11:44:57,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 11:44:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2024-02-20 11:44:57,409 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-02-20 11:44:57,410 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 25 predicate places. [2024-02-20 11:44:57,410 INFO L507 AbstractCegarLoop]: Abstraction has has 48 places, 71 transitions, 1152 flow [2024-02-20 11:44:57,410 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:44:57,410 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:44:57,410 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:44:57,411 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-20 11:44:57,411 INFO L432 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:44:57,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:44:57,411 INFO L85 PathProgramCache]: Analyzing trace with hash -737788137, now seen corresponding path program 1 times [2024-02-20 11:44:57,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:44:57,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027029887] [2024-02-20 11:44:57,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:44:57,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:44:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:44:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-02-20 11:44:57,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:44:57,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027029887] [2024-02-20 11:44:57,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027029887] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:44:57,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:44:57,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-20 11:44:57,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150164368] [2024-02-20 11:44:57,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:44:57,552 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 11:44:57,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:44:57,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 11:44:57,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-20 11:44:57,553 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:44:57,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 71 transitions, 1152 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:44:57,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:44:57,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:44:57,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:44:57,626 INFO L124 PetriNetUnfolderBase]: 99/194 cut-off events. [2024-02-20 11:44:57,626 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-02-20 11:44:57,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1762 conditions, 194 events. 99/194 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 540 event pairs, 0 based on Foata normal form. 2/154 useless extension candidates. Maximal degree in co-relation 1375. Up to 191 conditions per place. [2024-02-20 11:44:57,628 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 77 selfloop transitions, 10 changer transitions 8/96 dead transitions. [2024-02-20 11:44:57,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 96 transitions, 1751 flow [2024-02-20 11:44:57,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 11:44:57,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 11:44:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2024-02-20 11:44:57,629 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5108695652173914 [2024-02-20 11:44:57,630 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 28 predicate places. [2024-02-20 11:44:57,630 INFO L507 AbstractCegarLoop]: Abstraction has has 51 places, 96 transitions, 1751 flow [2024-02-20 11:44:57,630 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:44:57,630 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:44:57,630 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:44:57,630 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-20 11:44:57,631 INFO L432 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:44:57,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:44:57,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1750350151, now seen corresponding path program 2 times [2024-02-20 11:44:57,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:44:57,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623016506] [2024-02-20 11:44:57,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:44:57,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:44:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:44:57,743 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-02-20 11:44:57,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:44:57,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623016506] [2024-02-20 11:44:57,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623016506] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:44:57,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:44:57,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-20 11:44:57,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691674657] [2024-02-20 11:44:57,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:44:57,745 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 11:44:57,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:44:57,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 11:44:57,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-20 11:44:57,745 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:44:57,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 96 transitions, 1751 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:44:57,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:44:57,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:44:57,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:44:57,819 INFO L124 PetriNetUnfolderBase]: 88/172 cut-off events. [2024-02-20 11:44:57,819 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-02-20 11:44:57,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1742 conditions, 172 events. 88/172 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 457 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 1336. Up to 170 conditions per place. [2024-02-20 11:44:57,821 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 67 selfloop transitions, 9 changer transitions 8/85 dead transitions. [2024-02-20 11:44:57,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 85 transitions, 1715 flow [2024-02-20 11:44:57,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 11:44:57,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 11:44:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2024-02-20 11:44:57,822 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-02-20 11:44:57,822 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 31 predicate places. [2024-02-20 11:44:57,823 INFO L507 AbstractCegarLoop]: Abstraction has has 54 places, 85 transitions, 1715 flow [2024-02-20 11:44:57,823 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:44:57,823 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:44:57,823 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:44:57,823 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-20 11:44:57,823 INFO L432 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:44:57,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:44:57,824 INFO L85 PathProgramCache]: Analyzing trace with hash -193047773, now seen corresponding path program 1 times [2024-02-20 11:44:57,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:44:57,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759657113] [2024-02-20 11:44:57,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:44:57,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:44:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:44:58,354 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:44:58,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:44:58,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759657113] [2024-02-20 11:44:58,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759657113] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:44:58,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338732176] [2024-02-20 11:44:58,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:44:58,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:44:58,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:44:58,371 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:44:58,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-20 11:44:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:44:58,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 23 conjunts are in the unsatisfiable core [2024-02-20 11:44:58,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:44:58,591 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:44:58,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-02-20 11:44:58,621 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:44:58,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:44:58,950 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-02-20 11:44:58,950 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 118 treesize of output 79 [2024-02-20 11:44:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:44:58,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338732176] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:44:58,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:44:58,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-02-20 11:44:58,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786219079] [2024-02-20 11:44:58,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:44:58,986 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-20 11:44:58,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:44:58,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-20 11:44:58,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-02-20 11:44:58,987 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:44:58,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 85 transitions, 1715 flow. Second operand has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:44:58,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:44:58,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:44:58,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:44:59,402 INFO L124 PetriNetUnfolderBase]: 156/296 cut-off events. [2024-02-20 11:44:59,403 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-02-20 11:44:59,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3282 conditions, 296 events. 156/296 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 988 event pairs, 0 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 2423. Up to 293 conditions per place. [2024-02-20 11:44:59,405 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 96 selfloop transitions, 25 changer transitions 12/134 dead transitions. [2024-02-20 11:44:59,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 134 transitions, 2991 flow [2024-02-20 11:44:59,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-20 11:44:59,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-20 11:44:59,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 104 transitions. [2024-02-20 11:44:59,407 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.37681159420289856 [2024-02-20 11:44:59,407 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 42 predicate places. [2024-02-20 11:44:59,407 INFO L507 AbstractCegarLoop]: Abstraction has has 65 places, 134 transitions, 2991 flow [2024-02-20 11:44:59,407 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:44:59,408 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:44:59,408 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:44:59,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-20 11:44:59,619 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-02-20 11:44:59,619 INFO L432 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:44:59,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:44:59,620 INFO L85 PathProgramCache]: Analyzing trace with hash 855022251, now seen corresponding path program 2 times [2024-02-20 11:44:59,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:44:59,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709955953] [2024-02-20 11:44:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:44:59,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:44:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:00,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:00,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709955953] [2024-02-20 11:45:00,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709955953] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:00,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954830877] [2024-02-20 11:45:00,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:45:00,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:00,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:00,237 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:00,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-20 11:45:00,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:45:00,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:00,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-20 11:45:00,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:00,469 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:45:00,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-02-20 11:45:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:00,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:00,809 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-20 11:45:00,810 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 173 treesize of output 107 [2024-02-20 11:45:00,880 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:00,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954830877] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:00,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:00,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2024-02-20 11:45:00,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940299449] [2024-02-20 11:45:00,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:00,881 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-20 11:45:00,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:00,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-20 11:45:00,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-02-20 11:45:00,882 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:00,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 134 transitions, 2991 flow. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:00,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:00,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:00,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:01,284 INFO L124 PetriNetUnfolderBase]: 172/325 cut-off events. [2024-02-20 11:45:01,284 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-02-20 11:45:01,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3928 conditions, 325 events. 172/325 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1120 event pairs, 0 based on Foata normal form. 1/254 useless extension candidates. Maximal degree in co-relation 2882. Up to 322 conditions per place. [2024-02-20 11:45:01,288 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 108 selfloop transitions, 24 changer transitions 14/147 dead transitions. [2024-02-20 11:45:01,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 147 transitions, 3575 flow [2024-02-20 11:45:01,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-20 11:45:01,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-20 11:45:01,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 98 transitions. [2024-02-20 11:45:01,289 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3277591973244147 [2024-02-20 11:45:01,290 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 54 predicate places. [2024-02-20 11:45:01,290 INFO L507 AbstractCegarLoop]: Abstraction has has 77 places, 147 transitions, 3575 flow [2024-02-20 11:45:01,290 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:01,290 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:01,290 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:01,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:01,502 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:01,502 INFO L432 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:01,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:01,503 INFO L85 PathProgramCache]: Analyzing trace with hash 451964109, now seen corresponding path program 3 times [2024-02-20 11:45:01,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:01,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227590928] [2024-02-20 11:45:01,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:01,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:02,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:02,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227590928] [2024-02-20 11:45:02,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227590928] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:02,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379308633] [2024-02-20 11:45:02,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:45:02,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:02,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:02,032 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:02,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-20 11:45:02,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 11:45:02,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:02,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-20 11:45:02,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:02,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:45:02,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-02-20 11:45:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:02,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:02,587 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-20 11:45:02,587 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 173 treesize of output 107 [2024-02-20 11:45:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:02,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379308633] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:02,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:02,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2024-02-20 11:45:02,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003730230] [2024-02-20 11:45:02,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:02,670 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-20 11:45:02,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:02,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-20 11:45:02,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-02-20 11:45:02,671 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:02,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 147 transitions, 3575 flow. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:02,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:02,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:02,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:03,150 INFO L124 PetriNetUnfolderBase]: 178/340 cut-off events. [2024-02-20 11:45:03,151 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-02-20 11:45:03,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4450 conditions, 340 events. 178/340 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1214 event pairs, 0 based on Foata normal form. 1/265 useless extension candidates. Maximal degree in co-relation 3199. Up to 337 conditions per place. [2024-02-20 11:45:03,154 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 112 selfloop transitions, 24 changer transitions 16/153 dead transitions. [2024-02-20 11:45:03,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 153 transitions, 4029 flow [2024-02-20 11:45:03,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-20 11:45:03,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-20 11:45:03,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 95 transitions. [2024-02-20 11:45:03,156 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3442028985507246 [2024-02-20 11:45:03,156 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 65 predicate places. [2024-02-20 11:45:03,157 INFO L507 AbstractCegarLoop]: Abstraction has has 88 places, 153 transitions, 4029 flow [2024-02-20 11:45:03,157 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:03,157 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:03,157 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:03,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-02-20 11:45:03,368 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:03,369 INFO L432 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:03,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:03,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1812330923, now seen corresponding path program 4 times [2024-02-20 11:45:03,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:03,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510198768] [2024-02-20 11:45:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:03,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:03,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:03,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510198768] [2024-02-20 11:45:03,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510198768] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:03,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355197221] [2024-02-20 11:45:03,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:45:03,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:03,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:03,839 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:03,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-20 11:45:04,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:45:04,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:04,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 23 conjunts are in the unsatisfiable core [2024-02-20 11:45:04,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:04,067 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:45:04,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-02-20 11:45:04,094 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:04,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:04,371 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-20 11:45:04,371 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 173 treesize of output 107 [2024-02-20 11:45:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:04,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355197221] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:04,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:04,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-02-20 11:45:04,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481917889] [2024-02-20 11:45:04,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:04,431 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-20 11:45:04,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:04,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-20 11:45:04,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2024-02-20 11:45:04,432 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:04,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 153 transitions, 4029 flow. Second operand has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:04,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:04,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:04,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:04,733 INFO L124 PetriNetUnfolderBase]: 200/379 cut-off events. [2024-02-20 11:45:04,733 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-02-20 11:45:04,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5338 conditions, 379 events. 200/379 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1393 event pairs, 0 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 3864. Up to 376 conditions per place. [2024-02-20 11:45:04,737 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 126 selfloop transitions, 24 changer transitions 17/168 dead transitions. [2024-02-20 11:45:04,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 168 transitions, 4759 flow [2024-02-20 11:45:04,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-20 11:45:04,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-20 11:45:04,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 90 transitions. [2024-02-20 11:45:04,738 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.32608695652173914 [2024-02-20 11:45:04,739 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 76 predicate places. [2024-02-20 11:45:04,739 INFO L507 AbstractCegarLoop]: Abstraction has has 99 places, 168 transitions, 4759 flow [2024-02-20 11:45:04,739 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:04,739 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:04,739 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:04,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-02-20 11:45:04,950 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-02-20 11:45:04,950 INFO L432 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:04,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:04,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1608895693, now seen corresponding path program 5 times [2024-02-20 11:45:04,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:04,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368027465] [2024-02-20 11:45:04,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:04,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-20 11:45:05,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:05,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368027465] [2024-02-20 11:45:05,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368027465] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:05,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113973677] [2024-02-20 11:45:05,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:45:05,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:05,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:05,679 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:05,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-20 11:45:05,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 11:45:05,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:05,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-20 11:45:05,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:05,905 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:45:05,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-02-20 11:45:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:05,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:06,217 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-20 11:45:06,218 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 173 treesize of output 107 [2024-02-20 11:45:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:06,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113973677] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:06,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:06,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 8] total 29 [2024-02-20 11:45:06,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182553173] [2024-02-20 11:45:06,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:06,306 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-20 11:45:06,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:06,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-20 11:45:06,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2024-02-20 11:45:06,307 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:06,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 168 transitions, 4759 flow. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:06,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:06,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:06,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:06,890 INFO L124 PetriNetUnfolderBase]: 202/388 cut-off events. [2024-02-20 11:45:06,890 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-02-20 11:45:06,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5853 conditions, 388 events. 202/388 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1473 event pairs, 0 based on Foata normal form. 1/299 useless extension candidates. Maximal degree in co-relation 4229. Up to 385 conditions per place. [2024-02-20 11:45:06,895 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 122 selfloop transitions, 29 changer transitions 23/175 dead transitions. [2024-02-20 11:45:06,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 175 transitions, 5309 flow [2024-02-20 11:45:06,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-20 11:45:06,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-20 11:45:06,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 104 transitions. [2024-02-20 11:45:06,896 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.30144927536231886 [2024-02-20 11:45:06,896 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 90 predicate places. [2024-02-20 11:45:06,897 INFO L507 AbstractCegarLoop]: Abstraction has has 113 places, 175 transitions, 5309 flow [2024-02-20 11:45:06,897 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:06,897 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:06,897 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:06,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-02-20 11:45:07,115 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-02-20 11:45:07,116 INFO L432 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:07,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:07,116 INFO L85 PathProgramCache]: Analyzing trace with hash -187684385, now seen corresponding path program 6 times [2024-02-20 11:45:07,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:07,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972246021] [2024-02-20 11:45:07,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:07,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:07,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:07,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972246021] [2024-02-20 11:45:07,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972246021] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:07,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858718497] [2024-02-20 11:45:07,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:45:07,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:07,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:07,581 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:07,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-20 11:45:07,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-20 11:45:07,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:07,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-20 11:45:07,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:07,805 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:45:07,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-02-20 11:45:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:07,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:08,102 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-02-20 11:45:08,102 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 126 treesize of output 79 [2024-02-20 11:45:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:08,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858718497] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:08,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:08,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2024-02-20 11:45:08,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491025733] [2024-02-20 11:45:08,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:08,134 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-20 11:45:08,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:08,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-20 11:45:08,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-02-20 11:45:08,135 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:08,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 175 transitions, 5309 flow. Second operand has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:08,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:08,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:08,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:08,646 INFO L124 PetriNetUnfolderBase]: 268/509 cut-off events. [2024-02-20 11:45:08,646 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2024-02-20 11:45:08,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8155 conditions, 509 events. 268/509 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2109 event pairs, 0 based on Foata normal form. 1/384 useless extension candidates. Maximal degree in co-relation 5950. Up to 504 conditions per place. [2024-02-20 11:45:08,653 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 164 selfloop transitions, 48 changer transitions 38/251 dead transitions. [2024-02-20 11:45:08,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 251 transitions, 8125 flow [2024-02-20 11:45:08,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-20 11:45:08,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-20 11:45:08,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 111 transitions. [2024-02-20 11:45:08,654 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3447204968944099 [2024-02-20 11:45:08,654 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 103 predicate places. [2024-02-20 11:45:08,654 INFO L507 AbstractCegarLoop]: Abstraction has has 126 places, 251 transitions, 8125 flow [2024-02-20 11:45:08,655 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:08,655 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:08,655 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:08,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:08,866 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-02-20 11:45:08,866 INFO L432 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:08,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:08,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1572632509, now seen corresponding path program 7 times [2024-02-20 11:45:08,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:08,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751616113] [2024-02-20 11:45:08,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:08,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-20 11:45:09,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:09,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751616113] [2024-02-20 11:45:09,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751616113] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:09,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391868508] [2024-02-20 11:45:09,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:45:09,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:09,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:09,595 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:09,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-20 11:45:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:09,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 23 conjunts are in the unsatisfiable core [2024-02-20 11:45:09,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:09,779 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:45:09,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-02-20 11:45:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:09,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:10,082 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-20 11:45:10,082 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 173 treesize of output 107 [2024-02-20 11:45:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:10,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391868508] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:10,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:10,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 27 [2024-02-20 11:45:10,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167790579] [2024-02-20 11:45:10,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:10,143 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-02-20 11:45:10,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:10,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-02-20 11:45:10,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2024-02-20 11:45:10,144 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:10,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 251 transitions, 8125 flow. Second operand has 27 states, 27 states have (on average 4.888888888888889) internal successors, (132), 27 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:10,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:10,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:10,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:10,752 INFO L124 PetriNetUnfolderBase]: 284/538 cut-off events. [2024-02-20 11:45:10,752 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2024-02-20 11:45:10,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9157 conditions, 538 events. 284/538 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2273 event pairs, 0 based on Foata normal form. 1/403 useless extension candidates. Maximal degree in co-relation 6661. Up to 533 conditions per place. [2024-02-20 11:45:10,759 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 184 selfloop transitions, 38 changer transitions 41/264 dead transitions. [2024-02-20 11:45:10,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 264 transitions, 9076 flow [2024-02-20 11:45:10,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-20 11:45:10,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-20 11:45:10,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 117 transitions. [2024-02-20 11:45:10,761 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.29923273657289 [2024-02-20 11:45:10,762 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 119 predicate places. [2024-02-20 11:45:10,762 INFO L507 AbstractCegarLoop]: Abstraction has has 142 places, 264 transitions, 9076 flow [2024-02-20 11:45:10,762 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.888888888888889) internal successors, (132), 27 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:10,762 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:10,762 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:10,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:10,973 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-02-20 11:45:10,974 INFO L432 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:10,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:10,974 INFO L85 PathProgramCache]: Analyzing trace with hash 945924361, now seen corresponding path program 8 times [2024-02-20 11:45:10,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:10,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274523361] [2024-02-20 11:45:10,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:10,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:11,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:11,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274523361] [2024-02-20 11:45:11,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274523361] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:11,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916379225] [2024-02-20 11:45:11,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:45:11,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:11,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:11,420 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:11,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-20 11:45:11,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:45:11,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:11,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-20 11:45:11,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:11,598 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:45:11,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-02-20 11:45:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:11,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:11,887 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-20 11:45:11,888 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 173 treesize of output 107 [2024-02-20 11:45:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:11,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916379225] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:11,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:11,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2024-02-20 11:45:11,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552474008] [2024-02-20 11:45:11,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:11,962 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-20 11:45:11,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:11,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-20 11:45:11,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-02-20 11:45:11,963 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:11,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 264 transitions, 9076 flow. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:11,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:11,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:11,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:12,340 INFO L124 PetriNetUnfolderBase]: 290/553 cut-off events. [2024-02-20 11:45:12,340 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2024-02-20 11:45:12,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9965 conditions, 553 events. 290/553 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2370 event pairs, 0 based on Foata normal form. 1/414 useless extension candidates. Maximal degree in co-relation 7160. Up to 548 conditions per place. [2024-02-20 11:45:12,347 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 199 selfloop transitions, 30 changer transitions 47/277 dead transitions. [2024-02-20 11:45:12,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 277 transitions, 10079 flow [2024-02-20 11:45:12,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-20 11:45:12,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-20 11:45:12,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 92 transitions. [2024-02-20 11:45:12,348 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3076923076923077 [2024-02-20 11:45:12,348 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 131 predicate places. [2024-02-20 11:45:12,348 INFO L507 AbstractCegarLoop]: Abstraction has has 154 places, 277 transitions, 10079 flow [2024-02-20 11:45:12,348 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:12,349 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:12,349 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:12,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:12,560 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-02-20 11:45:12,560 INFO L432 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:12,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:12,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1169574367, now seen corresponding path program 9 times [2024-02-20 11:45:12,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:12,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797188504] [2024-02-20 11:45:12,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:12,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:13,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:13,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797188504] [2024-02-20 11:45:13,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797188504] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:13,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137532962] [2024-02-20 11:45:13,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:45:13,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:13,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:13,020 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:13,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-20 11:45:13,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 11:45:13,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:13,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-20 11:45:13,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:13,218 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:45:13,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-02-20 11:45:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:13,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:13,551 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-20 11:45:13,551 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 173 treesize of output 107 [2024-02-20 11:45:13,677 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:13,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137532962] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:13,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:13,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2024-02-20 11:45:13,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347244744] [2024-02-20 11:45:13,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:13,683 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-20 11:45:13,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:13,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-20 11:45:13,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-02-20 11:45:13,684 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:13,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 277 transitions, 10079 flow. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:13,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:13,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:13,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:14,027 INFO L124 PetriNetUnfolderBase]: 290/551 cut-off events. [2024-02-20 11:45:14,027 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-02-20 11:45:14,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10495 conditions, 551 events. 290/551 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2359 event pairs, 0 based on Foata normal form. 1/412 useless extension candidates. Maximal degree in co-relation 7557. Up to 547 conditions per place. [2024-02-20 11:45:14,041 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 195 selfloop transitions, 27 changer transitions 53/276 dead transitions. [2024-02-20 11:45:14,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 276 transitions, 10593 flow [2024-02-20 11:45:14,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-20 11:45:14,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-20 11:45:14,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 93 transitions. [2024-02-20 11:45:14,042 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.33695652173913043 [2024-02-20 11:45:14,043 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 142 predicate places. [2024-02-20 11:45:14,043 INFO L507 AbstractCegarLoop]: Abstraction has has 165 places, 276 transitions, 10593 flow [2024-02-20 11:45:14,043 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:14,043 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:14,043 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:14,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:14,254 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-02-20 11:45:14,255 INFO L432 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:14,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:14,255 INFO L85 PathProgramCache]: Analyzing trace with hash 5104618, now seen corresponding path program 10 times [2024-02-20 11:45:14,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:14,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167390393] [2024-02-20 11:45:14,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:14,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:14,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:14,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167390393] [2024-02-20 11:45:14,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167390393] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:14,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284237233] [2024-02-20 11:45:14,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:45:14,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:14,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:14,724 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:14,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-20 11:45:14,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:45:14,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:14,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-20 11:45:14,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:14,927 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-02-20 11:45:14,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-02-20 11:45:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:14,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:15,013 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-02-20 11:45:15,014 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 32 treesize of output 48 [2024-02-20 11:45:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:15,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284237233] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:15,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:15,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2024-02-20 11:45:15,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384478320] [2024-02-20 11:45:15,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:15,026 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-20 11:45:15,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:15,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-20 11:45:15,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-02-20 11:45:15,029 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:15,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 276 transitions, 10593 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:15,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:15,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:15,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:15,409 INFO L124 PetriNetUnfolderBase]: 306/579 cut-off events. [2024-02-20 11:45:15,410 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2024-02-20 11:45:15,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11606 conditions, 579 events. 306/579 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2518 event pairs, 0 based on Foata normal form. 0/435 useless extension candidates. Maximal degree in co-relation 8354. Up to 575 conditions per place. [2024-02-20 11:45:15,428 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 193 selfloop transitions, 41 changer transitions 53/288 dead transitions. [2024-02-20 11:45:15,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 288 transitions, 11629 flow [2024-02-20 11:45:15,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-20 11:45:15,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-20 11:45:15,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 97 transitions. [2024-02-20 11:45:15,429 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.383399209486166 [2024-02-20 11:45:15,430 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 152 predicate places. [2024-02-20 11:45:15,430 INFO L507 AbstractCegarLoop]: Abstraction has has 175 places, 288 transitions, 11629 flow [2024-02-20 11:45:15,430 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:15,430 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:15,430 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:15,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:15,641 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:15,641 INFO L432 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:15,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:15,642 INFO L85 PathProgramCache]: Analyzing trace with hash -978547905, now seen corresponding path program 11 times [2024-02-20 11:45:15,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:15,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155458839] [2024-02-20 11:45:15,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:15,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:16,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:16,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155458839] [2024-02-20 11:45:16,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155458839] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:16,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799241204] [2024-02-20 11:45:16,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:45:16,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:16,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:16,135 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:16,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-20 11:45:16,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 11:45:16,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:16,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-20 11:45:16,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:16,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:16,540 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-02-20 11:45:16,541 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 63 treesize of output 67 [2024-02-20 11:45:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:16,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799241204] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:16,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:16,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-02-20 11:45:16,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262582849] [2024-02-20 11:45:16,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:16,571 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-20 11:45:16,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:16,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-20 11:45:16,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2024-02-20 11:45:16,572 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:16,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 288 transitions, 11629 flow. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:16,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:16,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:16,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:16,963 INFO L124 PetriNetUnfolderBase]: 311/597 cut-off events. [2024-02-20 11:45:16,963 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2024-02-20 11:45:16,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12565 conditions, 597 events. 311/597 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2680 event pairs, 0 based on Foata normal form. 0/453 useless extension candidates. Maximal degree in co-relation 8918. Up to 593 conditions per place. [2024-02-20 11:45:16,969 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 197 selfloop transitions, 47 changer transitions 78/323 dead transitions. [2024-02-20 11:45:16,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 323 transitions, 13688 flow [2024-02-20 11:45:16,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-20 11:45:16,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-20 11:45:16,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 84 transitions. [2024-02-20 11:45:16,970 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4057971014492754 [2024-02-20 11:45:16,971 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 160 predicate places. [2024-02-20 11:45:16,971 INFO L507 AbstractCegarLoop]: Abstraction has has 183 places, 323 transitions, 13688 flow [2024-02-20 11:45:16,971 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:16,971 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:16,971 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:16,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:17,183 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:17,183 INFO L432 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:17,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:17,183 INFO L85 PathProgramCache]: Analyzing trace with hash -359293241, now seen corresponding path program 12 times [2024-02-20 11:45:17,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:17,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831904185] [2024-02-20 11:45:17,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:17,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:17,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:17,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831904185] [2024-02-20 11:45:17,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831904185] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:17,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369963100] [2024-02-20 11:45:17,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:45:17,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:17,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:17,657 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:17,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-20 11:45:17,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-20 11:45:17,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:17,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 31 conjunts are in the unsatisfiable core [2024-02-20 11:45:17,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:18,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:18,198 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-02-20 11:45:18,198 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 63 treesize of output 67 [2024-02-20 11:45:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:18,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369963100] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:18,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:18,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-02-20 11:45:18,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922591305] [2024-02-20 11:45:18,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:18,228 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-20 11:45:18,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:18,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-20 11:45:18,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2024-02-20 11:45:18,229 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:18,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 323 transitions, 13688 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:18,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:18,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:18,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:18,571 INFO L124 PetriNetUnfolderBase]: 313/608 cut-off events. [2024-02-20 11:45:18,571 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-02-20 11:45:18,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13405 conditions, 608 events. 313/608 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2789 event pairs, 0 based on Foata normal form. 0/464 useless extension candidates. Maximal degree in co-relation 9430. Up to 604 conditions per place. [2024-02-20 11:45:18,577 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 200 selfloop transitions, 39 changer transitions 91/331 dead transitions. [2024-02-20 11:45:18,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 331 transitions, 14693 flow [2024-02-20 11:45:18,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-20 11:45:18,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-20 11:45:18,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 84 transitions. [2024-02-20 11:45:18,578 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4057971014492754 [2024-02-20 11:45:18,578 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 168 predicate places. [2024-02-20 11:45:18,579 INFO L507 AbstractCegarLoop]: Abstraction has has 191 places, 331 transitions, 14693 flow [2024-02-20 11:45:18,579 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:18,579 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:18,579 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:18,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:18,790 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:18,791 INFO L432 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:18,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:18,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1060527458, now seen corresponding path program 13 times [2024-02-20 11:45:18,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:18,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008078369] [2024-02-20 11:45:18,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:18,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:19,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:19,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008078369] [2024-02-20 11:45:19,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008078369] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:19,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101455472] [2024-02-20 11:45:19,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:45:19,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:19,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:19,253 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:19,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-02-20 11:45:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:19,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-20 11:45:19,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:19,462 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:45:19,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-02-20 11:45:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:19,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:19,629 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-02-20 11:45:19,629 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 32 treesize of output 48 [2024-02-20 11:45:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:19,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101455472] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:19,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:19,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-02-20 11:45:19,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489929421] [2024-02-20 11:45:19,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:19,639 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 11:45:19,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:19,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 11:45:19,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-02-20 11:45:19,640 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:19,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 331 transitions, 14693 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:19,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:19,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:19,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:20,180 INFO L124 PetriNetUnfolderBase]: 333/649 cut-off events. [2024-02-20 11:45:20,181 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-02-20 11:45:20,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14936 conditions, 649 events. 333/649 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3048 event pairs, 0 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 10456. Up to 644 conditions per place. [2024-02-20 11:45:20,189 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 208 selfloop transitions, 47 changer transitions 93/349 dead transitions. [2024-02-20 11:45:20,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 349 transitions, 16193 flow [2024-02-20 11:45:20,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-20 11:45:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-20 11:45:20,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 135 transitions. [2024-02-20 11:45:20,190 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.391304347826087 [2024-02-20 11:45:20,190 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 182 predicate places. [2024-02-20 11:45:20,190 INFO L507 AbstractCegarLoop]: Abstraction has has 205 places, 349 transitions, 16193 flow [2024-02-20 11:45:20,190 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:20,190 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:20,190 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:20,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:20,402 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:20,402 INFO L432 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:20,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:20,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1650423018, now seen corresponding path program 14 times [2024-02-20 11:45:20,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:20,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982916294] [2024-02-20 11:45:20,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:20,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:20,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:20,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982916294] [2024-02-20 11:45:20,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982916294] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:20,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633567406] [2024-02-20 11:45:20,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:45:20,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:20,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:20,862 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:20,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-02-20 11:45:21,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:45:21,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:21,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-20 11:45:21,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:21,127 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:45:21,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-02-20 11:45:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:21,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:21,294 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-02-20 11:45:21,294 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 32 treesize of output 48 [2024-02-20 11:45:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:21,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633567406] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:21,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:21,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-02-20 11:45:21,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357860988] [2024-02-20 11:45:21,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:21,315 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 11:45:21,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:21,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 11:45:21,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-02-20 11:45:21,316 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:21,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 349 transitions, 16193 flow. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:21,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:21,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:21,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:21,969 INFO L124 PetriNetUnfolderBase]: 348/680 cut-off events. [2024-02-20 11:45:21,969 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2024-02-20 11:45:21,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16329 conditions, 680 events. 348/680 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3274 event pairs, 0 based on Foata normal form. 0/524 useless extension candidates. Maximal degree in co-relation 11414. Up to 675 conditions per place. [2024-02-20 11:45:21,976 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 216 selfloop transitions, 51 changer transitions 96/364 dead transitions. [2024-02-20 11:45:21,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 364 transitions, 17618 flow [2024-02-20 11:45:21,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-20 11:45:21,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-20 11:45:21,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 149 transitions. [2024-02-20 11:45:21,977 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.38107416879795397 [2024-02-20 11:45:21,977 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 198 predicate places. [2024-02-20 11:45:21,977 INFO L507 AbstractCegarLoop]: Abstraction has has 221 places, 364 transitions, 17618 flow [2024-02-20 11:45:21,978 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:21,978 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:21,978 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:21,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:22,189 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:22,189 INFO L432 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:22,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:22,190 INFO L85 PathProgramCache]: Analyzing trace with hash -2017836130, now seen corresponding path program 15 times [2024-02-20 11:45:22,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:22,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672040561] [2024-02-20 11:45:22,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:22,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:22,818 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-20 11:45:22,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:22,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672040561] [2024-02-20 11:45:22,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672040561] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:22,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686211749] [2024-02-20 11:45:22,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:45:22,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:22,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:22,820 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:22,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-02-20 11:45:22,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-20 11:45:22,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:22,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-20 11:45:22,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:23,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:23,239 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-02-20 11:45:23,239 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 32 treesize of output 48 [2024-02-20 11:45:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:23,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686211749] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:23,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:23,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 7] total 23 [2024-02-20 11:45:23,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603053963] [2024-02-20 11:45:23,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:23,260 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-20 11:45:23,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:23,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-20 11:45:23,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2024-02-20 11:45:23,261 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:23,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 364 transitions, 17618 flow. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:23,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:23,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:23,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:23,765 INFO L124 PetriNetUnfolderBase]: 374/721 cut-off events. [2024-02-20 11:45:23,765 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2024-02-20 11:45:23,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18057 conditions, 721 events. 374/721 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3475 event pairs, 0 based on Foata normal form. 0/563 useless extension candidates. Maximal degree in co-relation 12689. Up to 717 conditions per place. [2024-02-20 11:45:23,774 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 230 selfloop transitions, 54 changer transitions 96/381 dead transitions. [2024-02-20 11:45:23,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 381 transitions, 19200 flow [2024-02-20 11:45:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-20 11:45:23,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-20 11:45:23,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 135 transitions. [2024-02-20 11:45:23,775 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3452685421994885 [2024-02-20 11:45:23,776 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 212 predicate places. [2024-02-20 11:45:23,776 INFO L507 AbstractCegarLoop]: Abstraction has has 235 places, 381 transitions, 19200 flow [2024-02-20 11:45:23,776 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:23,776 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:23,776 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:23,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:23,987 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:23,988 INFO L432 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:23,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:23,988 INFO L85 PathProgramCache]: Analyzing trace with hash 746676931, now seen corresponding path program 16 times [2024-02-20 11:45:23,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:23,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532632426] [2024-02-20 11:45:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:23,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:24,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:24,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532632426] [2024-02-20 11:45:24,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532632426] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:24,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824930108] [2024-02-20 11:45:24,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:45:24,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:24,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:24,451 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:24,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-02-20 11:45:24,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:45:24,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:24,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-20 11:45:24,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:24,696 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:45:24,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-02-20 11:45:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:24,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:24,861 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-02-20 11:45:24,861 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 63 treesize of output 67 [2024-02-20 11:45:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:24,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824930108] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:24,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:24,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-02-20 11:45:24,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293847885] [2024-02-20 11:45:24,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:24,878 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-20 11:45:24,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:24,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-20 11:45:24,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-02-20 11:45:24,879 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:24,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 381 transitions, 19200 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:24,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:24,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:24,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:25,334 INFO L124 PetriNetUnfolderBase]: 386/748 cut-off events. [2024-02-20 11:45:25,334 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2024-02-20 11:45:25,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19456 conditions, 748 events. 386/748 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3658 event pairs, 0 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 13612. Up to 743 conditions per place. [2024-02-20 11:45:25,343 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 254 selfloop transitions, 41 changer transitions 96/392 dead transitions. [2024-02-20 11:45:25,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 392 transitions, 20538 flow [2024-02-20 11:45:25,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-20 11:45:25,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-20 11:45:25,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2024-02-20 11:45:25,344 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4396135265700483 [2024-02-20 11:45:25,344 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 220 predicate places. [2024-02-20 11:45:25,345 INFO L507 AbstractCegarLoop]: Abstraction has has 243 places, 392 transitions, 20538 flow [2024-02-20 11:45:25,345 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:25,345 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:25,345 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:25,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-02-20 11:45:25,556 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-02-20 11:45:25,556 INFO L432 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:25,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:25,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1149735073, now seen corresponding path program 17 times [2024-02-20 11:45:25,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:25,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489827354] [2024-02-20 11:45:25,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:25,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:25,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:25,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489827354] [2024-02-20 11:45:25,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489827354] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:25,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516278622] [2024-02-20 11:45:25,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:45:25,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:25,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:25,966 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:25,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-02-20 11:45:26,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 11:45:26,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:26,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-20 11:45:26,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:26,285 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:45:26,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-02-20 11:45:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:26,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:26,477 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-02-20 11:45:26,478 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 63 treesize of output 67 [2024-02-20 11:45:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:26,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516278622] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:26,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:26,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-02-20 11:45:26,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153871626] [2024-02-20 11:45:26,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:26,513 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-20 11:45:26,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:26,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-20 11:45:26,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-02-20 11:45:26,514 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:26,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 392 transitions, 20538 flow. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:26,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:26,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:26,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:26,976 INFO L124 PetriNetUnfolderBase]: 376/727 cut-off events. [2024-02-20 11:45:26,977 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2024-02-20 11:45:26,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19657 conditions, 727 events. 376/727 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3544 event pairs, 0 based on Foata normal form. 0/571 useless extension candidates. Maximal degree in co-relation 13919. Up to 723 conditions per place. [2024-02-20 11:45:26,988 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 243 selfloop transitions, 40 changer transitions 100/384 dead transitions. [2024-02-20 11:45:26,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 384 transitions, 20882 flow [2024-02-20 11:45:26,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-20 11:45:26,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-20 11:45:26,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 95 transitions. [2024-02-20 11:45:26,990 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.41304347826086957 [2024-02-20 11:45:26,991 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 229 predicate places. [2024-02-20 11:45:26,991 INFO L507 AbstractCegarLoop]: Abstraction has has 252 places, 384 transitions, 20882 flow [2024-02-20 11:45:26,991 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:26,991 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:26,991 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:27,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:27,204 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-02-20 11:45:27,204 INFO L432 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:27,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:27,205 INFO L85 PathProgramCache]: Analyzing trace with hash 734798347, now seen corresponding path program 18 times [2024-02-20 11:45:27,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:27,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988821166] [2024-02-20 11:45:27,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:27,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:27,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:27,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988821166] [2024-02-20 11:45:27,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988821166] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:27,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842591228] [2024-02-20 11:45:27,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:45:27,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:27,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:27,692 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:27,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-02-20 11:45:27,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-20 11:45:27,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:27,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-20 11:45:27,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:27,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:28,053 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:45:28,053 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 71 treesize of output 88 [2024-02-20 11:45:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:28,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842591228] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:28,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:28,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-02-20 11:45:28,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636109636] [2024-02-20 11:45:28,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:28,098 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-20 11:45:28,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:28,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-20 11:45:28,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-02-20 11:45:28,099 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:28,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 384 transitions, 20882 flow. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:28,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:28,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:28,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:28,447 INFO L124 PetriNetUnfolderBase]: 372/723 cut-off events. [2024-02-20 11:45:28,448 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2024-02-20 11:45:28,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20270 conditions, 723 events. 372/723 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3548 event pairs, 0 based on Foata normal form. 0/571 useless extension candidates. Maximal degree in co-relation 14378. Up to 719 conditions per place. [2024-02-20 11:45:28,457 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 251 selfloop transitions, 23 changer transitions 108/383 dead transitions. [2024-02-20 11:45:28,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 383 transitions, 21592 flow [2024-02-20 11:45:28,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-20 11:45:28,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-20 11:45:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 73 transitions. [2024-02-20 11:45:28,458 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3526570048309179 [2024-02-20 11:45:28,459 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 237 predicate places. [2024-02-20 11:45:28,459 INFO L507 AbstractCegarLoop]: Abstraction has has 260 places, 383 transitions, 21592 flow [2024-02-20 11:45:28,459 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:28,459 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:28,459 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:28,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-02-20 11:45:28,668 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-02-20 11:45:28,668 INFO L432 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:28,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:28,668 INFO L85 PathProgramCache]: Analyzing trace with hash -2051140635, now seen corresponding path program 19 times [2024-02-20 11:45:28,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:28,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147638916] [2024-02-20 11:45:28,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:28,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:29,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:29,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147638916] [2024-02-20 11:45:29,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147638916] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:29,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784106917] [2024-02-20 11:45:29,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:45:29,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:29,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:29,063 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:29,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-02-20 11:45:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:29,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-20 11:45:29,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:29,282 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:45:29,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-02-20 11:45:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:29,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:29,420 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:45:29,420 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 71 treesize of output 88 [2024-02-20 11:45:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:29,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784106917] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:29,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:29,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-02-20 11:45:29,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46607864] [2024-02-20 11:45:29,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:29,493 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 11:45:29,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:29,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 11:45:29,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-02-20 11:45:29,494 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:29,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 383 transitions, 21592 flow. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:29,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:29,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:29,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:29,982 INFO L124 PetriNetUnfolderBase]: 380/746 cut-off events. [2024-02-20 11:45:29,982 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2024-02-20 11:45:29,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21633 conditions, 746 events. 380/746 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3709 event pairs, 0 based on Foata normal form. 0/592 useless extension candidates. Maximal degree in co-relation 15355. Up to 741 conditions per place. [2024-02-20 11:45:29,992 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 252 selfloop transitions, 28 changer transitions 112/393 dead transitions. [2024-02-20 11:45:29,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 393 transitions, 22942 flow [2024-02-20 11:45:29,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-20 11:45:29,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-20 11:45:29,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 97 transitions. [2024-02-20 11:45:29,993 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.383399209486166 [2024-02-20 11:45:29,993 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 247 predicate places. [2024-02-20 11:45:29,994 INFO L507 AbstractCegarLoop]: Abstraction has has 270 places, 393 transitions, 22942 flow [2024-02-20 11:45:29,994 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:29,994 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:29,994 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:30,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-02-20 11:45:30,201 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:30,201 INFO L432 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:30,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:30,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1916343199, now seen corresponding path program 20 times [2024-02-20 11:45:30,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:30,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344413676] [2024-02-20 11:45:30,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:30,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:30,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:30,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344413676] [2024-02-20 11:45:30,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344413676] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:30,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967968225] [2024-02-20 11:45:30,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:45:30,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:30,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:30,564 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) [2024-02-20 11:45:30,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-02-20 11:45:30,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:45:30,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:30,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-20 11:45:30,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:30,822 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:45:30,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-02-20 11:45:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:30,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:30,964 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:45:30,965 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 44 treesize of output 77 [2024-02-20 11:45:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:31,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967968225] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:31,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:31,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-02-20 11:45:31,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521106940] [2024-02-20 11:45:31,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:31,003 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-20 11:45:31,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:31,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-20 11:45:31,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-02-20 11:45:31,003 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:31,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 393 transitions, 22942 flow. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:31,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:31,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:31,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:31,538 INFO L124 PetriNetUnfolderBase]: 408/804 cut-off events. [2024-02-20 11:45:31,539 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2024-02-20 11:45:31,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24064 conditions, 804 events. 408/804 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4098 event pairs, 0 based on Foata normal form. 0/634 useless extension candidates. Maximal degree in co-relation 16964. Up to 797 conditions per place. [2024-02-20 11:45:31,548 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 270 selfloop transitions, 33 changer transitions 112/416 dead transitions. [2024-02-20 11:45:31,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 416 transitions, 25118 flow [2024-02-20 11:45:31,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-20 11:45:31,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-20 11:45:31,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 117 transitions. [2024-02-20 11:45:31,549 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.36335403726708076 [2024-02-20 11:45:31,549 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 260 predicate places. [2024-02-20 11:45:31,549 INFO L507 AbstractCegarLoop]: Abstraction has has 283 places, 416 transitions, 25118 flow [2024-02-20 11:45:31,550 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:31,550 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:31,550 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:31,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:31,761 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-02-20 11:45:31,761 INFO L432 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:31,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:31,762 INFO L85 PathProgramCache]: Analyzing trace with hash 33564130, now seen corresponding path program 21 times [2024-02-20 11:45:31,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:31,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285860351] [2024-02-20 11:45:31,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:31,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:45:32,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:32,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285860351] [2024-02-20 11:45:32,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285860351] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:32,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739161185] [2024-02-20 11:45:32,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:45:32,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:32,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:32,908 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) [2024-02-20 11:45:32,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-02-20 11:45:33,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 11:45:33,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:33,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2024-02-20 11:45:33,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:33,193 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:45:33,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-02-20 11:45:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:33,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:33,404 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:45:33,405 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 44 treesize of output 77 [2024-02-20 11:45:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:33,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739161185] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:33,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:33,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 7] total 29 [2024-02-20 11:45:33,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494637626] [2024-02-20 11:45:33,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:33,468 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-20 11:45:33,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:33,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-20 11:45:33,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2024-02-20 11:45:33,469 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:33,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 416 transitions, 25118 flow. Second operand has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:33,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:33,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:33,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:34,147 INFO L124 PetriNetUnfolderBase]: 422/835 cut-off events. [2024-02-20 11:45:34,147 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-02-20 11:45:34,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25797 conditions, 835 events. 422/835 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4295 event pairs, 0 based on Foata normal form. 0/657 useless extension candidates. Maximal degree in co-relation 18025. Up to 826 conditions per place. [2024-02-20 11:45:34,159 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 274 selfloop transitions, 43 changer transitions 114/432 dead transitions. [2024-02-20 11:45:34,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 432 transitions, 26949 flow [2024-02-20 11:45:34,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-20 11:45:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-20 11:45:34,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 145 transitions. [2024-02-20 11:45:34,161 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3318077803203661 [2024-02-20 11:45:34,161 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 278 predicate places. [2024-02-20 11:45:34,161 INFO L507 AbstractCegarLoop]: Abstraction has has 301 places, 432 transitions, 26949 flow [2024-02-20 11:45:34,161 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:34,162 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:34,162 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:34,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:34,373 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:34,373 INFO L432 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:34,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:34,373 INFO L85 PathProgramCache]: Analyzing trace with hash 571419708, now seen corresponding path program 22 times [2024-02-20 11:45:34,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:34,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725284660] [2024-02-20 11:45:34,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:34,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:34,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:34,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725284660] [2024-02-20 11:45:34,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725284660] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:34,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717813441] [2024-02-20 11:45:34,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:45:34,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:34,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:34,757 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) [2024-02-20 11:45:34,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-02-20 11:45:34,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:45:34,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:34,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-20 11:45:34,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:34,974 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:45:34,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-02-20 11:45:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:35,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:35,090 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:45:35,090 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 71 treesize of output 88 [2024-02-20 11:45:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:35,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717813441] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:35,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:35,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-02-20 11:45:35,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330938025] [2024-02-20 11:45:35,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:35,148 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 11:45:35,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:35,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 11:45:35,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-02-20 11:45:35,148 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:35,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 432 transitions, 26949 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:35,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:35,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:35,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:35,652 INFO L124 PetriNetUnfolderBase]: 436/873 cut-off events. [2024-02-20 11:45:35,652 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2024-02-20 11:45:35,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27785 conditions, 873 events. 436/873 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4609 event pairs, 0 based on Foata normal form. 0/687 useless extension candidates. Maximal degree in co-relation 19310. Up to 862 conditions per place. [2024-02-20 11:45:35,664 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 305 selfloop transitions, 29 changer transitions 116/451 dead transitions. [2024-02-20 11:45:35,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 451 transitions, 29042 flow [2024-02-20 11:45:35,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-20 11:45:35,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-20 11:45:35,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 105 transitions. [2024-02-20 11:45:35,666 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3804347826086957 [2024-02-20 11:45:35,666 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 289 predicate places. [2024-02-20 11:45:35,666 INFO L507 AbstractCegarLoop]: Abstraction has has 312 places, 451 transitions, 29042 flow [2024-02-20 11:45:35,666 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:35,666 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:35,666 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:35,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:35,870 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-02-20 11:45:35,870 INFO L432 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:35,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:35,871 INFO L85 PathProgramCache]: Analyzing trace with hash -923744542, now seen corresponding path program 23 times [2024-02-20 11:45:35,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:35,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075425487] [2024-02-20 11:45:35,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:35,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-20 11:45:36,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:36,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075425487] [2024-02-20 11:45:36,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075425487] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:36,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129026688] [2024-02-20 11:45:36,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:45:36,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:36,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:36,551 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) [2024-02-20 11:45:36,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-02-20 11:45:36,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 11:45:36,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:36,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 11:45:36,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:36,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:37,056 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:45:37,056 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 44 treesize of output 77 [2024-02-20 11:45:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:37,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129026688] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:37,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:37,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 26 [2024-02-20 11:45:37,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055094285] [2024-02-20 11:45:37,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:37,094 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-20 11:45:37,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:37,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-20 11:45:37,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2024-02-20 11:45:37,095 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:37,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 451 transitions, 29042 flow. Second operand has 26 states, 26 states have (on average 5.230769230769231) internal successors, (136), 26 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:37,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:37,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:37,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:37,756 INFO L124 PetriNetUnfolderBase]: 444/887 cut-off events. [2024-02-20 11:45:37,756 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2024-02-20 11:45:37,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29113 conditions, 887 events. 444/887 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4673 event pairs, 0 based on Foata normal form. 0/699 useless extension candidates. Maximal degree in co-relation 20243. Up to 876 conditions per place. [2024-02-20 11:45:37,771 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 302 selfloop transitions, 38 changer transitions 116/457 dead transitions. [2024-02-20 11:45:37,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 457 transitions, 30341 flow [2024-02-20 11:45:37,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-20 11:45:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-20 11:45:37,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 111 transitions. [2024-02-20 11:45:37,772 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3217391304347826 [2024-02-20 11:45:37,773 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 303 predicate places. [2024-02-20 11:45:37,773 INFO L507 AbstractCegarLoop]: Abstraction has has 326 places, 457 transitions, 30341 flow [2024-02-20 11:45:37,774 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.230769230769231) internal successors, (136), 26 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:37,774 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:37,774 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:37,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:37,980 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:37,980 INFO L432 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:37,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:37,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1840768519, now seen corresponding path program 24 times [2024-02-20 11:45:37,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:37,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935145612] [2024-02-20 11:45:37,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:37,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-20 11:45:38,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:38,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935145612] [2024-02-20 11:45:38,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935145612] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:38,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635801865] [2024-02-20 11:45:38,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:45:38,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:38,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:38,612 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:38,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-02-20 11:45:38,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 11:45:38,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:38,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 31 conjunts are in the unsatisfiable core [2024-02-20 11:45:38,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:38,983 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:45:38,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-02-20 11:45:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:39,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:39,152 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:45:39,152 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 71 treesize of output 88 [2024-02-20 11:45:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:39,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635801865] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:39,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:39,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 7] total 22 [2024-02-20 11:45:39,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014115672] [2024-02-20 11:45:39,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:39,201 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-20 11:45:39,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:39,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-20 11:45:39,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2024-02-20 11:45:39,202 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:39,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 457 transitions, 30341 flow. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:39,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:39,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:39,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:39,690 INFO L124 PetriNetUnfolderBase]: 438/870 cut-off events. [2024-02-20 11:45:39,690 INFO L125 PetriNetUnfolderBase]: For 134/134 co-relation queries the response was YES. [2024-02-20 11:45:39,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29444 conditions, 870 events. 438/870 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4544 event pairs, 0 based on Foata normal form. 0/686 useless extension candidates. Maximal degree in co-relation 20584. Up to 860 conditions per place. [2024-02-20 11:45:39,703 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 294 selfloop transitions, 39 changer transitions 116/450 dead transitions. [2024-02-20 11:45:39,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 450 transitions, 30771 flow [2024-02-20 11:45:39,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-20 11:45:39,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-20 11:45:39,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 103 transitions. [2024-02-20 11:45:39,704 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3198757763975155 [2024-02-20 11:45:39,704 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 315 predicate places. [2024-02-20 11:45:39,705 INFO L507 AbstractCegarLoop]: Abstraction has has 338 places, 450 transitions, 30771 flow [2024-02-20 11:45:39,705 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:39,705 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:39,705 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:39,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:39,916 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:39,916 INFO L432 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:39,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:39,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1550452690, now seen corresponding path program 25 times [2024-02-20 11:45:39,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:39,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745314495] [2024-02-20 11:45:39,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:39,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:39,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:40,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:40,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745314495] [2024-02-20 11:45:40,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745314495] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:40,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284516193] [2024-02-20 11:45:40,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:45:40,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:40,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:40,272 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:40,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-02-20 11:45:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:40,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-20 11:45:40,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:40,500 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:45:40,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-02-20 11:45:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:40,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:40,650 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:45:40,650 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 44 treesize of output 77 [2024-02-20 11:45:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:40,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284516193] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:40,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:40,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-02-20 11:45:40,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405743076] [2024-02-20 11:45:40,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:40,700 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-20 11:45:40,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:40,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-20 11:45:40,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-02-20 11:45:40,701 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:40,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 450 transitions, 30771 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:40,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:40,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:40,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:41,318 INFO L124 PetriNetUnfolderBase]: 440/869 cut-off events. [2024-02-20 11:45:41,318 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2024-02-20 11:45:41,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30305 conditions, 869 events. 440/869 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4516 event pairs, 0 based on Foata normal form. 0/689 useless extension candidates. Maximal degree in co-relation 21259. Up to 860 conditions per place. [2024-02-20 11:45:41,332 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 301 selfloop transitions, 31 changer transitions 116/449 dead transitions. [2024-02-20 11:45:41,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 449 transitions, 31596 flow [2024-02-20 11:45:41,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-20 11:45:41,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-20 11:45:41,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 113 transitions. [2024-02-20 11:45:41,333 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3779264214046823 [2024-02-20 11:45:41,333 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 326 predicate places. [2024-02-20 11:45:41,333 INFO L507 AbstractCegarLoop]: Abstraction has has 349 places, 449 transitions, 31596 flow [2024-02-20 11:45:41,333 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:41,333 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:41,333 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:41,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:41,544 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:41,545 INFO L432 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:41,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:41,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1012597112, now seen corresponding path program 26 times [2024-02-20 11:45:41,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:41,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464381562] [2024-02-20 11:45:41,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:41,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:41,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:41,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464381562] [2024-02-20 11:45:41,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464381562] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:41,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558656882] [2024-02-20 11:45:41,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:45:41,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:41,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:41,944 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:41,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-02-20 11:45:42,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:45:42,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:42,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-20 11:45:42,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:42,243 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:45:42,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-02-20 11:45:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:42,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:42,400 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:45:42,400 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 71 treesize of output 88 [2024-02-20 11:45:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:42,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558656882] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:42,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:42,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-02-20 11:45:42,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852417415] [2024-02-20 11:45:42,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:42,462 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-20 11:45:42,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:42,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-20 11:45:42,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-02-20 11:45:42,463 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:42,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 449 transitions, 31596 flow. Second operand has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:42,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:42,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:42,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:42,955 INFO L124 PetriNetUnfolderBase]: 434/854 cut-off events. [2024-02-20 11:45:42,955 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2024-02-20 11:45:42,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30661 conditions, 854 events. 434/854 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4427 event pairs, 0 based on Foata normal form. 0/680 useless extension candidates. Maximal degree in co-relation 21578. Up to 846 conditions per place. [2024-02-20 11:45:42,970 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 297 selfloop transitions, 28 changer transitions 116/442 dead transitions. [2024-02-20 11:45:42,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 442 transitions, 31982 flow [2024-02-20 11:45:42,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-20 11:45:42,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-20 11:45:42,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 88 transitions. [2024-02-20 11:45:42,971 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3826086956521739 [2024-02-20 11:45:42,971 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 334 predicate places. [2024-02-20 11:45:42,971 INFO L507 AbstractCegarLoop]: Abstraction has has 357 places, 442 transitions, 31982 flow [2024-02-20 11:45:42,971 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:42,971 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:42,972 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:42,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:43,183 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-02-20 11:45:43,184 INFO L432 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:43,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:43,184 INFO L85 PathProgramCache]: Analyzing trace with hash -555976385, now seen corresponding path program 27 times [2024-02-20 11:45:43,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:43,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650244061] [2024-02-20 11:45:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:43,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-20 11:45:43,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:43,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650244061] [2024-02-20 11:45:43,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650244061] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:43,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362286777] [2024-02-20 11:45:43,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:45:43,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:43,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:43,728 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:43,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-02-20 11:45:43,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-20 11:45:43,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:43,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-20 11:45:43,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:44,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:44,094 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:45:44,095 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 44 treesize of output 77 [2024-02-20 11:45:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:44,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362286777] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:44,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:44,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 7] total 22 [2024-02-20 11:45:44,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133657951] [2024-02-20 11:45:44,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:44,148 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-20 11:45:44,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:44,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-20 11:45:44,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2024-02-20 11:45:44,149 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:44,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 442 transitions, 31982 flow. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:44,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:44,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:44,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:44,583 INFO L124 PetriNetUnfolderBase]: 430/843 cut-off events. [2024-02-20 11:45:44,583 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2024-02-20 11:45:44,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31136 conditions, 843 events. 430/843 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4342 event pairs, 0 based on Foata normal form. 0/675 useless extension candidates. Maximal degree in co-relation 22177. Up to 836 conditions per place. [2024-02-20 11:45:44,597 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 288 selfloop transitions, 33 changer transitions 116/438 dead transitions. [2024-02-20 11:45:44,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 438 transitions, 32562 flow [2024-02-20 11:45:44,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-20 11:45:44,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-20 11:45:44,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 87 transitions. [2024-02-20 11:45:44,598 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.31521739130434784 [2024-02-20 11:45:44,598 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 344 predicate places. [2024-02-20 11:45:44,599 INFO L507 AbstractCegarLoop]: Abstraction has has 367 places, 438 transitions, 32562 flow [2024-02-20 11:45:44,599 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:44,599 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:44,599 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:44,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-02-20 11:45:44,802 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-02-20 11:45:44,802 INFO L432 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:44,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:44,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1513285057, now seen corresponding path program 28 times [2024-02-20 11:45:44,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:44,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716717492] [2024-02-20 11:45:44,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:44,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:45,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:45,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716717492] [2024-02-20 11:45:45,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716717492] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:45,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931575160] [2024-02-20 11:45:45,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:45:45,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:45,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:45,171 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:45,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-02-20 11:45:45,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:45:45,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:45,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-20 11:45:45,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:45,412 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:45:45,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-02-20 11:45:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:45,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:45,592 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:45:45,594 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 44 treesize of output 77 [2024-02-20 11:45:45,624 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:45,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931575160] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:45,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:45,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-02-20 11:45:45,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472893650] [2024-02-20 11:45:45,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:45,627 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 11:45:45,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:45,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 11:45:45,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-02-20 11:45:45,627 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:45,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 438 transitions, 32562 flow. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:45,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:45,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:45,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:46,127 INFO L124 PetriNetUnfolderBase]: 420/822 cut-off events. [2024-02-20 11:45:46,127 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2024-02-20 11:45:46,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31211 conditions, 822 events. 420/822 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4203 event pairs, 0 based on Foata normal form. 0/662 useless extension candidates. Maximal degree in co-relation 22472. Up to 816 conditions per place. [2024-02-20 11:45:46,142 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 280 selfloop transitions, 29 changer transitions 120/430 dead transitions. [2024-02-20 11:45:46,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 430 transitions, 32822 flow [2024-02-20 11:45:46,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-20 11:45:46,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-20 11:45:46,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 88 transitions. [2024-02-20 11:45:46,143 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2024-02-20 11:45:46,143 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 353 predicate places. [2024-02-20 11:45:46,143 INFO L507 AbstractCegarLoop]: Abstraction has has 376 places, 430 transitions, 32822 flow [2024-02-20 11:45:46,143 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:46,143 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:46,144 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:46,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:46,355 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:46,355 INFO L432 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:46,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:46,356 INFO L85 PathProgramCache]: Analyzing trace with hash -744737596, now seen corresponding path program 29 times [2024-02-20 11:45:46,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:46,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925563371] [2024-02-20 11:45:46,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:46,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:46,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:46,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925563371] [2024-02-20 11:45:46,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925563371] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:46,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668406800] [2024-02-20 11:45:46,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:45:46,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:46,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:46,756 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:46,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-02-20 11:45:47,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 11:45:47,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:47,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 11:45:47,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:47,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:47,201 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:45:47,202 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 71 treesize of output 88 [2024-02-20 11:45:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:47,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668406800] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:47,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:47,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-02-20 11:45:47,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241708224] [2024-02-20 11:45:47,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:47,256 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-20 11:45:47,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:47,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-20 11:45:47,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2024-02-20 11:45:47,257 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:47,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 430 transitions, 32822 flow. Second operand has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:47,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:47,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:47,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:47,686 INFO L124 PetriNetUnfolderBase]: 416/809 cut-off events. [2024-02-20 11:45:47,686 INFO L125 PetriNetUnfolderBase]: For 107/107 co-relation queries the response was YES. [2024-02-20 11:45:47,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31559 conditions, 809 events. 416/809 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4103 event pairs, 0 based on Foata normal form. 0/653 useless extension candidates. Maximal degree in co-relation 22751. Up to 804 conditions per place. [2024-02-20 11:45:47,701 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 275 selfloop transitions, 22 changer transitions 124/422 dead transitions. [2024-02-20 11:45:47,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 422 transitions, 33050 flow [2024-02-20 11:45:47,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-20 11:45:47,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-20 11:45:47,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 77 transitions. [2024-02-20 11:45:47,703 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3347826086956522 [2024-02-20 11:45:47,703 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 362 predicate places. [2024-02-20 11:45:47,703 INFO L507 AbstractCegarLoop]: Abstraction has has 385 places, 422 transitions, 33050 flow [2024-02-20 11:45:47,703 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:47,703 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:47,703 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:47,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-02-20 11:45:47,906 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-02-20 11:45:47,906 INFO L432 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:47,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:47,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1679297296, now seen corresponding path program 30 times [2024-02-20 11:45:47,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:47,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146534274] [2024-02-20 11:45:47,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:47,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:48,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:48,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146534274] [2024-02-20 11:45:48,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146534274] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:48,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323615451] [2024-02-20 11:45:48,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:45:48,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:48,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:48,292 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:48,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-02-20 11:45:48,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-20 11:45:48,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:48,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-20 11:45:48,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:48,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:48,689 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-02-20 11:45:48,690 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 63 treesize of output 67 [2024-02-20 11:45:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:48,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323615451] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:48,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:48,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-02-20 11:45:48,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095058664] [2024-02-20 11:45:48,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:48,714 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 11:45:48,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:48,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 11:45:48,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-02-20 11:45:48,715 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:48,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 422 transitions, 33050 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:48,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:48,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:48,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:49,176 INFO L124 PetriNetUnfolderBase]: 417/819 cut-off events. [2024-02-20 11:45:49,176 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-02-20 11:45:49,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32768 conditions, 819 events. 417/819 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4237 event pairs, 0 based on Foata normal form. 0/663 useless extension candidates. Maximal degree in co-relation 23614. Up to 814 conditions per place. [2024-02-20 11:45:49,190 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 243 selfloop transitions, 51 changer transitions 135/430 dead transitions. [2024-02-20 11:45:49,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 430 transitions, 34538 flow [2024-02-20 11:45:49,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-20 11:45:49,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-20 11:45:49,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 78 transitions. [2024-02-20 11:45:49,191 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.37681159420289856 [2024-02-20 11:45:49,192 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 370 predicate places. [2024-02-20 11:45:49,192 INFO L507 AbstractCegarLoop]: Abstraction has has 393 places, 430 transitions, 34538 flow [2024-02-20 11:45:49,192 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:49,192 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:49,192 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:49,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:49,393 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-02-20 11:45:49,393 INFO L432 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:49,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:49,394 INFO L85 PathProgramCache]: Analyzing trace with hash -152663024, now seen corresponding path program 31 times [2024-02-20 11:45:49,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:49,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302622975] [2024-02-20 11:45:49,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:49,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:49,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:49,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302622975] [2024-02-20 11:45:49,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302622975] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:49,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499212566] [2024-02-20 11:45:49,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:45:49,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:49,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:49,751 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:49,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-02-20 11:45:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:49,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-20 11:45:49,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:50,040 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-02-20 11:45:50,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-02-20 11:45:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:50,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:50,131 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:45:50,131 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 44 treesize of output 77 [2024-02-20 11:45:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:50,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499212566] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:50,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:50,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-02-20 11:45:50,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008904200] [2024-02-20 11:45:50,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:50,167 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-20 11:45:50,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:50,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-20 11:45:50,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-02-20 11:45:50,170 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:50,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 430 transitions, 34538 flow. Second operand has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:50,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:50,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:50,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:50,598 INFO L124 PetriNetUnfolderBase]: 425/833 cut-off events. [2024-02-20 11:45:50,599 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2024-02-20 11:45:50,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34160 conditions, 833 events. 425/833 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4299 event pairs, 0 based on Foata normal form. 0/675 useless extension candidates. Maximal degree in co-relation 24614. Up to 828 conditions per place. [2024-02-20 11:45:50,613 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 277 selfloop transitions, 23 changer transitions 135/436 dead transitions. [2024-02-20 11:45:50,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 436 transitions, 35891 flow [2024-02-20 11:45:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-20 11:45:50,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-20 11:45:50,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 76 transitions. [2024-02-20 11:45:50,615 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3671497584541063 [2024-02-20 11:45:50,616 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 378 predicate places. [2024-02-20 11:45:50,616 INFO L507 AbstractCegarLoop]: Abstraction has has 401 places, 436 transitions, 35891 flow [2024-02-20 11:45:50,616 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:50,616 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:50,616 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:50,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-02-20 11:45:50,827 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-02-20 11:45:50,827 INFO L432 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:50,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:50,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1505879865, now seen corresponding path program 32 times [2024-02-20 11:45:50,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:50,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205542067] [2024-02-20 11:45:50,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:50,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:51,809 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:45:51,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:51,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205542067] [2024-02-20 11:45:51,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205542067] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:51,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700697638] [2024-02-20 11:45:51,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:45:51,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:51,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:51,811 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:51,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-02-20 11:45:52,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:45:52,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:52,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 31 conjunts are in the unsatisfiable core [2024-02-20 11:45:52,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:52,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:52,296 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:45:52,296 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 71 treesize of output 88 [2024-02-20 11:45:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:52,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700697638] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:52,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:52,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 7] total 28 [2024-02-20 11:45:52,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300488417] [2024-02-20 11:45:52,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:52,367 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-02-20 11:45:52,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:52,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-02-20 11:45:52,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2024-02-20 11:45:52,367 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:52,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 436 transitions, 35891 flow. Second operand has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:52,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:52,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:52,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:52,984 INFO L124 PetriNetUnfolderBase]: 421/829 cut-off events. [2024-02-20 11:45:52,984 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2024-02-20 11:45:52,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34823 conditions, 829 events. 421/829 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4300 event pairs, 0 based on Foata normal form. 0/675 useless extension candidates. Maximal degree in co-relation 25130. Up to 824 conditions per place. [2024-02-20 11:45:53,000 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 256 selfloop transitions, 35 changer transitions 143/435 dead transitions. [2024-02-20 11:45:53,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 435 transitions, 36677 flow [2024-02-20 11:45:53,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-20 11:45:53,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-20 11:45:53,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 107 transitions. [2024-02-20 11:45:53,001 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.2907608695652174 [2024-02-20 11:45:53,002 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 393 predicate places. [2024-02-20 11:45:53,002 INFO L507 AbstractCegarLoop]: Abstraction has has 416 places, 435 transitions, 36677 flow [2024-02-20 11:45:53,002 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:53,002 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:53,002 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:53,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:53,214 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:53,214 INFO L432 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:53,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:53,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1280059117, now seen corresponding path program 33 times [2024-02-20 11:45:53,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:53,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957522986] [2024-02-20 11:45:53,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:53,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:53,612 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:53,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:53,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957522986] [2024-02-20 11:45:53,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957522986] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:53,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942636960] [2024-02-20 11:45:53,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:45:53,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:53,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:53,614 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:53,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-02-20 11:45:53,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-20 11:45:53,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:53,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-20 11:45:53,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:53,911 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:45:53,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-02-20 11:45:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:53,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:54,053 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:45:54,053 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 71 treesize of output 88 [2024-02-20 11:45:54,116 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:54,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942636960] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:54,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:54,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-02-20 11:45:54,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453461601] [2024-02-20 11:45:54,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:54,117 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-20 11:45:54,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:54,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-20 11:45:54,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-02-20 11:45:54,117 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:54,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 435 transitions, 36677 flow. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:54,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:54,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:54,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:54,674 INFO L124 PetriNetUnfolderBase]: 429/852 cut-off events. [2024-02-20 11:45:54,675 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2024-02-20 11:45:54,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36600 conditions, 852 events. 429/852 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4501 event pairs, 0 based on Foata normal form. 0/696 useless extension candidates. Maximal degree in co-relation 26416. Up to 846 conditions per place. [2024-02-20 11:45:54,692 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 271 selfloop transitions, 26 changer transitions 147/445 dead transitions. [2024-02-20 11:45:54,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 445 transitions, 38411 flow [2024-02-20 11:45:54,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-20 11:45:54,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-20 11:45:54,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 99 transitions. [2024-02-20 11:45:54,700 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.358695652173913 [2024-02-20 11:45:54,712 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 404 predicate places. [2024-02-20 11:45:54,712 INFO L507 AbstractCegarLoop]: Abstraction has has 427 places, 445 transitions, 38411 flow [2024-02-20 11:45:54,712 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:54,713 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:54,713 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:54,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:54,913 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:54,913 INFO L432 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:54,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:54,913 INFO L85 PathProgramCache]: Analyzing trace with hash -779371172, now seen corresponding path program 34 times [2024-02-20 11:45:54,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:54,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926109486] [2024-02-20 11:45:54,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:54,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:54,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:55,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:55,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926109486] [2024-02-20 11:45:55,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926109486] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:55,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290408050] [2024-02-20 11:45:55,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:45:55,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:55,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:55,280 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:55,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-02-20 11:45:55,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:45:55,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:55,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-20 11:45:55,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:55,546 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:45:55,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-02-20 11:45:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:55,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:55,682 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:45:55,682 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 44 treesize of output 77 [2024-02-20 11:45:55,709 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:55,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290408050] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:55,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:55,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-02-20 11:45:55,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285012350] [2024-02-20 11:45:55,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:55,711 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-20 11:45:55,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:55,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-20 11:45:55,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-02-20 11:45:55,712 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:55,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 445 transitions, 38411 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:55,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:55,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:55,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:56,357 INFO L124 PetriNetUnfolderBase]: 447/891 cut-off events. [2024-02-20 11:45:56,357 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-02-20 11:45:56,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39126 conditions, 891 events. 447/891 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4761 event pairs, 0 based on Foata normal form. 0/729 useless extension candidates. Maximal degree in co-relation 28174. Up to 884 conditions per place. [2024-02-20 11:45:56,375 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 287 selfloop transitions, 29 changer transitions 147/464 dead transitions. [2024-02-20 11:45:56,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 464 transitions, 40983 flow [2024-02-20 11:45:56,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-20 11:45:56,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-20 11:45:56,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 114 transitions. [2024-02-20 11:45:56,376 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.38127090301003347 [2024-02-20 11:45:56,378 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 416 predicate places. [2024-02-20 11:45:56,378 INFO L507 AbstractCegarLoop]: Abstraction has has 439 places, 464 transitions, 40983 flow [2024-02-20 11:45:56,378 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:56,379 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:56,379 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:56,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-02-20 11:45:56,584 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-02-20 11:45:56,584 INFO L432 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:56,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:56,584 INFO L85 PathProgramCache]: Analyzing trace with hash -2080440198, now seen corresponding path program 35 times [2024-02-20 11:45:56,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:56,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374760576] [2024-02-20 11:45:56,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:56,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:56,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:56,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374760576] [2024-02-20 11:45:56,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374760576] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:56,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068919324] [2024-02-20 11:45:56,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:45:56,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:56,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:56,966 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:56,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-02-20 11:45:57,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 11:45:57,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:57,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-20 11:45:57,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:57,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:57,434 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-02-20 11:45:57,434 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 63 treesize of output 67 [2024-02-20 11:45:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:57,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068919324] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:57,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:57,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-02-20 11:45:57,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670923764] [2024-02-20 11:45:57,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:57,465 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-20 11:45:57,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:57,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-20 11:45:57,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-02-20 11:45:57,465 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:57,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 464 transitions, 40983 flow. Second operand has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:57,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:57,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:57,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:58,082 INFO L124 PetriNetUnfolderBase]: 447/898 cut-off events. [2024-02-20 11:45:58,082 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2024-02-20 11:45:58,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40330 conditions, 898 events. 447/898 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4865 event pairs, 0 based on Foata normal form. 0/736 useless extension candidates. Maximal degree in co-relation 28994. Up to 891 conditions per place. [2024-02-20 11:45:58,098 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 266 selfloop transitions, 47 changer transitions 156/470 dead transitions. [2024-02-20 11:45:58,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 470 transitions, 42455 flow [2024-02-20 11:45:58,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-20 11:45:58,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-20 11:45:58,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 76 transitions. [2024-02-20 11:45:58,099 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3671497584541063 [2024-02-20 11:45:58,099 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 424 predicate places. [2024-02-20 11:45:58,099 INFO L507 AbstractCegarLoop]: Abstraction has has 447 places, 470 transitions, 42455 flow [2024-02-20 11:45:58,100 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:58,100 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:58,100 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:58,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:58,311 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-02-20 11:45:58,312 INFO L432 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:58,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:58,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1891678987, now seen corresponding path program 36 times [2024-02-20 11:45:58,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:58,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847609100] [2024-02-20 11:45:58,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:58,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:58,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:58,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847609100] [2024-02-20 11:45:58,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847609100] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:58,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824466739] [2024-02-20 11:45:58,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:45:58,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:58,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:58,640 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:58,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-02-20 11:45:58,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-20 11:45:58,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:58,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-20 11:45:58,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:58,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:59,038 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-02-20 11:45:59,039 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 32 treesize of output 48 [2024-02-20 11:45:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:45:59,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824466739] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:59,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:59,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-02-20 11:45:59,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747656071] [2024-02-20 11:45:59,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:59,052 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-20 11:45:59,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:59,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-20 11:45:59,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-02-20 11:45:59,053 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:45:59,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 470 transitions, 42455 flow. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:59,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:59,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:45:59,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:59,602 INFO L124 PetriNetUnfolderBase]: 465/928 cut-off events. [2024-02-20 11:45:59,603 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2024-02-20 11:45:59,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42604 conditions, 928 events. 465/928 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5077 event pairs, 0 based on Foata normal form. 0/760 useless extension candidates. Maximal degree in co-relation 31018. Up to 921 conditions per place. [2024-02-20 11:45:59,621 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 272 selfloop transitions, 53 changer transitions 156/482 dead transitions. [2024-02-20 11:45:59,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 482 transitions, 44497 flow [2024-02-20 11:45:59,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-20 11:45:59,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-20 11:45:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 101 transitions. [2024-02-20 11:45:59,622 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3377926421404682 [2024-02-20 11:45:59,623 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 436 predicate places. [2024-02-20 11:45:59,623 INFO L507 AbstractCegarLoop]: Abstraction has has 459 places, 482 transitions, 44497 flow [2024-02-20 11:45:59,623 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:59,623 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:59,623 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:59,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:59,830 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-02-20 11:45:59,830 INFO L432 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:59,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:59,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1683117259, now seen corresponding path program 37 times [2024-02-20 11:45:59,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:59,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694887712] [2024-02-20 11:45:59,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:59,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:00,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:46:00,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694887712] [2024-02-20 11:46:00,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694887712] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:46:00,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086432776] [2024-02-20 11:46:00,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:46:00,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:00,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:46:00,216 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:46:00,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-02-20 11:46:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:00,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-20 11:46:00,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:46:00,490 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:46:00,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-02-20 11:46:00,519 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:00,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:46:00,622 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:46:00,622 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 71 treesize of output 88 [2024-02-20 11:46:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:00,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086432776] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:46:00,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:46:00,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-02-20 11:46:00,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369799752] [2024-02-20 11:46:00,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:46:00,659 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-20 11:46:00,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:46:00,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-20 11:46:00,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-02-20 11:46:00,660 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:46:00,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 482 transitions, 44497 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:00,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:46:00,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:46:00,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:46:01,197 INFO L124 PetriNetUnfolderBase]: 459/911 cut-off events. [2024-02-20 11:46:01,198 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2024-02-20 11:46:01,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42772 conditions, 911 events. 459/911 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4919 event pairs, 0 based on Foata normal form. 0/747 useless extension candidates. Maximal degree in co-relation 31316. Up to 905 conditions per place. [2024-02-20 11:46:01,218 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 293 selfloop transitions, 25 changer transitions 156/475 dead transitions. [2024-02-20 11:46:01,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 475 transitions, 44795 flow [2024-02-20 11:46:01,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-20 11:46:01,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-20 11:46:01,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 80 transitions. [2024-02-20 11:46:01,219 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2024-02-20 11:46:01,219 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 444 predicate places. [2024-02-20 11:46:01,219 INFO L507 AbstractCegarLoop]: Abstraction has has 467 places, 475 transitions, 44795 flow [2024-02-20 11:46:01,219 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:01,219 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:46:01,219 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:46:01,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-02-20 11:46:01,431 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-02-20 11:46:01,431 INFO L432 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:46:01,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:46:01,432 INFO L85 PathProgramCache]: Analyzing trace with hash 215105133, now seen corresponding path program 38 times [2024-02-20 11:46:01,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:46:01,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043639254] [2024-02-20 11:46:01,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:46:01,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:46:01,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-02-20 11:46:02,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:46:02,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043639254] [2024-02-20 11:46:02,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043639254] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:46:02,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637371630] [2024-02-20 11:46:02,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:46:02,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:02,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:46:02,141 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:46:02,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-02-20 11:46:02,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:46:02,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:46:02,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-20 11:46:02,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:46:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:02,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:46:02,553 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:46:02,553 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 44 treesize of output 77 [2024-02-20 11:46:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:02,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637371630] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:46:02,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:46:02,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 7] total 24 [2024-02-20 11:46:02,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175666036] [2024-02-20 11:46:02,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:46:02,603 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-20 11:46:02,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:46:02,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-20 11:46:02,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2024-02-20 11:46:02,603 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:46:02,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 475 transitions, 44795 flow. Second operand has 24 states, 24 states have (on average 5.041666666666667) internal successors, (121), 24 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:02,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:46:02,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:46:02,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:46:03,232 INFO L124 PetriNetUnfolderBase]: 465/921 cut-off events. [2024-02-20 11:46:03,232 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2024-02-20 11:46:03,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44160 conditions, 921 events. 465/921 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4988 event pairs, 0 based on Foata normal form. 0/755 useless extension candidates. Maximal degree in co-relation 32462. Up to 915 conditions per place. [2024-02-20 11:46:03,254 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 285 selfloop transitions, 37 changer transitions 156/479 dead transitions. [2024-02-20 11:46:03,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 479 transitions, 46127 flow [2024-02-20 11:46:03,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-20 11:46:03,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-20 11:46:03,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 99 transitions. [2024-02-20 11:46:03,255 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.28695652173913044 [2024-02-20 11:46:03,255 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 458 predicate places. [2024-02-20 11:46:03,255 INFO L507 AbstractCegarLoop]: Abstraction has has 481 places, 479 transitions, 46127 flow [2024-02-20 11:46:03,255 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.041666666666667) internal successors, (121), 24 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:03,255 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:46:03,255 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:46:03,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-02-20 11:46:03,464 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:03,464 INFO L432 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:46:03,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:46:03,465 INFO L85 PathProgramCache]: Analyzing trace with hash -314337257, now seen corresponding path program 39 times [2024-02-20 11:46:03,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:46:03,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658638797] [2024-02-20 11:46:03,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:46:03,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:46:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:03,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:46:03,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658638797] [2024-02-20 11:46:03,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658638797] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:46:03,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352901493] [2024-02-20 11:46:03,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:46:03,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:03,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:46:03,789 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:46:03,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-02-20 11:46:04,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-20 11:46:04,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:46:04,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-20 11:46:04,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:46:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:04,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:46:04,178 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-02-20 11:46:04,178 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 32 treesize of output 48 [2024-02-20 11:46:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:04,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352901493] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:46:04,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:46:04,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-02-20 11:46:04,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273870904] [2024-02-20 11:46:04,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:46:04,195 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-20 11:46:04,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:46:04,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-20 11:46:04,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-02-20 11:46:04,195 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:46:04,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 479 transitions, 46127 flow. Second operand has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:04,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:46:04,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:46:04,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:46:04,799 INFO L124 PetriNetUnfolderBase]: 483/951 cut-off events. [2024-02-20 11:46:04,799 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2024-02-20 11:46:04,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46548 conditions, 951 events. 483/951 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5171 event pairs, 0 based on Foata normal form. 0/779 useless extension candidates. Maximal degree in co-relation 34608. Up to 945 conditions per place. [2024-02-20 11:46:04,821 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 283 selfloop transitions, 51 changer transitions 156/491 dead transitions. [2024-02-20 11:46:04,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 491 transitions, 48259 flow [2024-02-20 11:46:04,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-20 11:46:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-20 11:46:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 87 transitions. [2024-02-20 11:46:04,823 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3438735177865613 [2024-02-20 11:46:04,823 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 468 predicate places. [2024-02-20 11:46:04,823 INFO L507 AbstractCegarLoop]: Abstraction has has 491 places, 491 transitions, 48259 flow [2024-02-20 11:46:04,823 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:04,823 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:46:04,824 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:46:04,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-02-20 11:46:05,035 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-02-20 11:46:05,035 INFO L432 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:46:05,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:46:05,036 INFO L85 PathProgramCache]: Analyzing trace with hash -764282894, now seen corresponding path program 40 times [2024-02-20 11:46:05,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:46:05,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13401087] [2024-02-20 11:46:05,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:46:05,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:46:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:05,421 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:05,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:46:05,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13401087] [2024-02-20 11:46:05,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13401087] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:46:05,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349279236] [2024-02-20 11:46:05,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:46:05,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:05,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:46:05,422 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:46:05,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-02-20 11:46:05,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:46:05,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:46:05,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 19 conjunts are in the unsatisfiable core [2024-02-20 11:46:05,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:46:05,717 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:46:05,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-02-20 11:46:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:05,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:46:05,855 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-02-20 11:46:05,856 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 63 treesize of output 67 [2024-02-20 11:46:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:05,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349279236] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:46:05,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:46:05,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-02-20 11:46:05,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321241184] [2024-02-20 11:46:05,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:46:05,873 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 11:46:05,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:46:05,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 11:46:05,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-02-20 11:46:05,873 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:46:05,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 491 transitions, 48259 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:05,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:46:05,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:46:05,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:46:06,598 INFO L124 PetriNetUnfolderBase]: 495/978 cut-off events. [2024-02-20 11:46:06,598 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2024-02-20 11:46:06,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48800 conditions, 978 events. 495/978 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5361 event pairs, 0 based on Foata normal form. 0/800 useless extension candidates. Maximal degree in co-relation 36114. Up to 971 conditions per place. [2024-02-20 11:46:06,627 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 294 selfloop transitions, 50 changer transitions 158/503 dead transitions. [2024-02-20 11:46:06,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 503 transitions, 50448 flow [2024-02-20 11:46:06,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-20 11:46:06,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-20 11:46:06,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 102 transitions. [2024-02-20 11:46:06,628 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4031620553359684 [2024-02-20 11:46:06,628 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 478 predicate places. [2024-02-20 11:46:06,629 INFO L507 AbstractCegarLoop]: Abstraction has has 501 places, 503 transitions, 50448 flow [2024-02-20 11:46:06,629 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:06,629 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:46:06,629 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:46:06,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-02-20 11:46:06,842 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-02-20 11:46:06,842 INFO L432 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:46:06,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:46:06,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1445979637, now seen corresponding path program 41 times [2024-02-20 11:46:06,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:46:06,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952403995] [2024-02-20 11:46:06,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:46:06,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:46:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:07,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:46:07,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952403995] [2024-02-20 11:46:07,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952403995] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:46:07,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216829875] [2024-02-20 11:46:07,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:46:07,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:07,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:46:07,230 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:46:07,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-02-20 11:46:07,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 11:46:07,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:46:07,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-20 11:46:07,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:46:07,618 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:46:07,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-02-20 11:46:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:07,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:46:07,770 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-02-20 11:46:07,770 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 32 treesize of output 48 [2024-02-20 11:46:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:07,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216829875] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:46:07,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:46:07,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-02-20 11:46:07,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773464629] [2024-02-20 11:46:07,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:46:07,789 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-20 11:46:07,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:46:07,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-20 11:46:07,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-02-20 11:46:07,789 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:46:07,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 503 transitions, 50448 flow. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:07,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:46:07,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:46:07,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:46:08,524 INFO L124 PetriNetUnfolderBase]: 503/1001 cut-off events. [2024-02-20 11:46:08,524 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2024-02-20 11:46:08,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50900 conditions, 1001 events. 503/1001 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5582 event pairs, 0 based on Foata normal form. 0/821 useless extension candidates. Maximal degree in co-relation 37652. Up to 993 conditions per place. [2024-02-20 11:46:08,549 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 292 selfloop transitions, 58 changer transitions 162/513 dead transitions. [2024-02-20 11:46:08,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 513 transitions, 52478 flow [2024-02-20 11:46:08,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-20 11:46:08,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-20 11:46:08,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 121 transitions. [2024-02-20 11:46:08,550 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3507246376811594 [2024-02-20 11:46:08,551 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 492 predicate places. [2024-02-20 11:46:08,551 INFO L507 AbstractCegarLoop]: Abstraction has has 515 places, 513 transitions, 52478 flow [2024-02-20 11:46:08,551 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:08,551 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:46:08,551 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:46:08,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-02-20 11:46:08,763 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-02-20 11:46:08,763 INFO L432 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:46:08,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:46:08,763 INFO L85 PathProgramCache]: Analyzing trace with hash 804645648, now seen corresponding path program 42 times [2024-02-20 11:46:08,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:46:08,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936398685] [2024-02-20 11:46:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:46:08,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:46:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-20 11:46:09,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:46:09,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936398685] [2024-02-20 11:46:09,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936398685] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:46:09,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678798678] [2024-02-20 11:46:09,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:46:09,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:09,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:46:09,310 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:46:09,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-02-20 11:46:09,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 11:46:09,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:46:09,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 36 conjunts are in the unsatisfiable core [2024-02-20 11:46:09,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:46:09,691 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:46:09,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-02-20 11:46:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:09,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:46:09,868 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:46:09,868 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 44 treesize of output 77 [2024-02-20 11:46:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:09,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678798678] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:46:09,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:46:09,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 8] total 24 [2024-02-20 11:46:09,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281306897] [2024-02-20 11:46:09,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:46:09,937 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-20 11:46:09,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:46:09,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-20 11:46:09,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-02-20 11:46:09,938 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:46:09,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 513 transitions, 52478 flow. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:09,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:46:09,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:46:09,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:46:10,621 INFO L124 PetriNetUnfolderBase]: 499/988 cut-off events. [2024-02-20 11:46:10,621 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2024-02-20 11:46:10,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51269 conditions, 988 events. 499/988 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5473 event pairs, 0 based on Foata normal form. 0/812 useless extension candidates. Maximal degree in co-relation 37974. Up to 981 conditions per place. [2024-02-20 11:46:10,645 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 305 selfloop transitions, 35 changer transitions 164/505 dead transitions. [2024-02-20 11:46:10,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 505 transitions, 52664 flow [2024-02-20 11:46:10,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-20 11:46:10,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-20 11:46:10,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 120 transitions. [2024-02-20 11:46:10,646 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.32608695652173914 [2024-02-20 11:46:10,646 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 506 predicate places. [2024-02-20 11:46:10,646 INFO L507 AbstractCegarLoop]: Abstraction has has 529 places, 505 transitions, 52664 flow [2024-02-20 11:46:10,646 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:10,646 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:46:10,646 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:46:10,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-02-20 11:46:10,858 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:10,858 INFO L432 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:46:10,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:46:10,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1946667582, now seen corresponding path program 43 times [2024-02-20 11:46:10,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:46:10,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909149180] [2024-02-20 11:46:10,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:46:10,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:46:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:11,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:46:11,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909149180] [2024-02-20 11:46:11,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909149180] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:46:11,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080133561] [2024-02-20 11:46:11,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:46:11,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:11,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:46:11,304 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:46:11,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-02-20 11:46:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:11,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-20 11:46:11,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:46:11,661 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:46:11,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-02-20 11:46:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:11,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:46:11,799 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-02-20 11:46:11,800 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 63 treesize of output 67 [2024-02-20 11:46:11,813 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:11,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080133561] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:46:11,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:46:11,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-02-20 11:46:11,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169468999] [2024-02-20 11:46:11,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:46:11,814 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-20 11:46:11,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:46:11,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-20 11:46:11,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2024-02-20 11:46:11,814 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:46:11,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 505 transitions, 52664 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:11,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:46:11,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:46:11,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:46:12,447 INFO L124 PetriNetUnfolderBase]: 493/973 cut-off events. [2024-02-20 11:46:12,447 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2024-02-20 11:46:12,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51508 conditions, 973 events. 493/973 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5353 event pairs, 0 based on Foata normal form. 0/803 useless extension candidates. Maximal degree in co-relation 38280. Up to 967 conditions per place. [2024-02-20 11:46:12,471 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 285 selfloop transitions, 48 changer transitions 164/498 dead transitions. [2024-02-20 11:46:12,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 498 transitions, 52924 flow [2024-02-20 11:46:12,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-20 11:46:12,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-20 11:46:12,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 83 transitions. [2024-02-20 11:46:12,472 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.40096618357487923 [2024-02-20 11:46:12,473 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 513 predicate places. [2024-02-20 11:46:12,473 INFO L507 AbstractCegarLoop]: Abstraction has has 536 places, 498 transitions, 52924 flow [2024-02-20 11:46:12,473 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:12,473 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:46:12,473 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:46:12,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-02-20 11:46:12,685 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:12,685 INFO L432 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:46:12,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:46:12,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1042921495, now seen corresponding path program 44 times [2024-02-20 11:46:12,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:46:12,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131878850] [2024-02-20 11:46:12,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:46:12,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:46:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:13,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:46:13,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131878850] [2024-02-20 11:46:13,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131878850] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:46:13,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173254254] [2024-02-20 11:46:13,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:46:13,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:13,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:46:13,092 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:46:13,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-02-20 11:46:13,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:46:13,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:46:13,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-20 11:46:13,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:46:13,436 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:46:13,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-02-20 11:46:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:13,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:46:13,589 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-02-20 11:46:13,590 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 32 treesize of output 48 [2024-02-20 11:46:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:13,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173254254] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:46:13,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:46:13,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-02-20 11:46:13,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966835892] [2024-02-20 11:46:13,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:46:13,614 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 11:46:13,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:46:13,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 11:46:13,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-02-20 11:46:13,615 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:46:13,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 498 transitions, 52924 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:13,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:46:13,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:46:13,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:46:14,443 INFO L124 PetriNetUnfolderBase]: 505/986 cut-off events. [2024-02-20 11:46:14,443 INFO L125 PetriNetUnfolderBase]: For 127/127 co-relation queries the response was YES. [2024-02-20 11:46:14,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53230 conditions, 986 events. 505/986 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5431 event pairs, 0 based on Foata normal form. 0/814 useless extension candidates. Maximal degree in co-relation 40190. Up to 981 conditions per place. [2024-02-20 11:46:14,465 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 275 selfloop transitions, 63 changer transitions 164/503 dead transitions. [2024-02-20 11:46:14,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 503 transitions, 54452 flow [2024-02-20 11:46:14,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-20 11:46:14,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-20 11:46:14,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 117 transitions. [2024-02-20 11:46:14,466 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3391304347826087 [2024-02-20 11:46:14,466 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 526 predicate places. [2024-02-20 11:46:14,466 INFO L507 AbstractCegarLoop]: Abstraction has has 549 places, 503 transitions, 54452 flow [2024-02-20 11:46:14,467 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:14,467 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:46:14,467 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:46:14,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-02-20 11:46:14,678 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:14,678 INFO L432 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:46:14,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:46:14,679 INFO L85 PathProgramCache]: Analyzing trace with hash -742203539, now seen corresponding path program 45 times [2024-02-20 11:46:14,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:46:14,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307048364] [2024-02-20 11:46:14,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:46:14,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:46:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:15,005 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:15,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:46:15,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307048364] [2024-02-20 11:46:15,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307048364] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:46:15,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310383534] [2024-02-20 11:46:15,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:46:15,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:15,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:46:15,007 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:46:15,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-02-20 11:46:15,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 11:46:15,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:46:15,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 41 conjunts are in the unsatisfiable core [2024-02-20 11:46:15,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:46:15,349 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:46:15,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-02-20 11:46:15,399 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:15,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:46:15,558 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:46:15,558 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 44 treesize of output 77 [2024-02-20 11:46:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:15,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310383534] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:46:15,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:46:15,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-02-20 11:46:15,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714628774] [2024-02-20 11:46:15,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:46:15,592 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-20 11:46:15,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:46:15,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-20 11:46:15,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-02-20 11:46:15,593 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:46:15,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 503 transitions, 54452 flow. Second operand has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:15,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:46:15,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:46:15,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:46:16,487 INFO L124 PetriNetUnfolderBase]: 511/1005 cut-off events. [2024-02-20 11:46:16,488 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-02-20 11:46:16,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55262 conditions, 1005 events. 511/1005 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5584 event pairs, 0 based on Foata normal form. 1/834 useless extension candidates. Maximal degree in co-relation 41704. Up to 1000 conditions per place. [2024-02-20 11:46:16,506 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 301 selfloop transitions, 34 changer transitions 177/513 dead transitions. [2024-02-20 11:46:16,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 513 transitions, 56565 flow [2024-02-20 11:46:16,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-20 11:46:16,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-20 11:46:16,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 132 transitions. [2024-02-20 11:46:16,507 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.358695652173913 [2024-02-20 11:46:16,507 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 541 predicate places. [2024-02-20 11:46:16,507 INFO L507 AbstractCegarLoop]: Abstraction has has 564 places, 513 transitions, 56565 flow [2024-02-20 11:46:16,508 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:16,508 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:46:16,508 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:46:16,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-02-20 11:46:16,719 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-02-20 11:46:16,719 INFO L432 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:46:16,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:46:16,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1145261681, now seen corresponding path program 46 times [2024-02-20 11:46:16,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:46:16,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822724149] [2024-02-20 11:46:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:46:16,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:46:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:17,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:46:17,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822724149] [2024-02-20 11:46:17,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822724149] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:46:17,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441692589] [2024-02-20 11:46:17,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:46:17,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:17,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:46:17,059 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:46:17,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-02-20 11:46:17,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:46:17,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:46:17,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-20 11:46:17,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:46:17,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:46:17,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-02-20 11:46:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:17,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:46:17,513 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:46:17,513 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 44 treesize of output 77 [2024-02-20 11:46:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:17,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441692589] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:46:17,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:46:17,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-02-20 11:46:17,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033864662] [2024-02-20 11:46:17,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:46:17,549 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-20 11:46:17,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:46:17,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-20 11:46:17,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-02-20 11:46:17,550 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:46:17,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 513 transitions, 56565 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:17,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:46:17,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:46:17,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:46:18,292 INFO L124 PetriNetUnfolderBase]: 511/998 cut-off events. [2024-02-20 11:46:18,292 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2024-02-20 11:46:18,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55925 conditions, 998 events. 511/998 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5507 event pairs, 0 based on Foata normal form. 0/828 useless extension candidates. Maximal degree in co-relation 42574. Up to 994 conditions per place. [2024-02-20 11:46:18,318 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 303 selfloop transitions, 29 changer transitions 177/510 dead transitions. [2024-02-20 11:46:18,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 510 transitions, 57247 flow [2024-02-20 11:46:18,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-20 11:46:18,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-20 11:46:18,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 97 transitions. [2024-02-20 11:46:18,319 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.32441471571906355 [2024-02-20 11:46:18,319 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 552 predicate places. [2024-02-20 11:46:18,319 INFO L507 AbstractCegarLoop]: Abstraction has has 575 places, 510 transitions, 57247 flow [2024-02-20 11:46:18,319 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:18,319 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:46:18,319 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:46:18,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-02-20 11:46:18,531 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-02-20 11:46:18,532 INFO L432 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:46:18,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:46:18,532 INFO L85 PathProgramCache]: Analyzing trace with hash 157155500, now seen corresponding path program 47 times [2024-02-20 11:46:18,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:46:18,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532703651] [2024-02-20 11:46:18,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:46:18,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:46:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:46:19,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:46:19,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532703651] [2024-02-20 11:46:19,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532703651] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:46:19,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160709770] [2024-02-20 11:46:19,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:46:19,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:19,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:46:19,646 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:46:19,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-02-20 11:46:19,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 11:46:19,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:46:19,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 35 conjunts are in the unsatisfiable core [2024-02-20 11:46:20,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:46:20,163 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:46:20,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2024-02-20 11:46:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:20,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:46:20,536 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-02-20 11:46:20,536 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 134 treesize of output 83 [2024-02-20 11:46:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:20,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160709770] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:46:20,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:46:20,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 10] total 41 [2024-02-20 11:46:20,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957101277] [2024-02-20 11:46:20,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:46:20,621 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-02-20 11:46:20,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:46:20,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-02-20 11:46:20,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1461, Unknown=0, NotChecked=0, Total=1640 [2024-02-20 11:46:20,622 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:46:20,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 510 transitions, 57247 flow. Second operand has 41 states, 41 states have (on average 4.7317073170731705) internal successors, (194), 41 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:20,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:46:20,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:46:20,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:46:22,304 INFO L124 PetriNetUnfolderBase]: 659/1262 cut-off events. [2024-02-20 11:46:22,304 INFO L125 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2024-02-20 11:46:22,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71938 conditions, 1262 events. 659/1262 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 7182 event pairs, 0 based on Foata normal form. 1/1043 useless extension candidates. Maximal degree in co-relation 54054. Up to 1257 conditions per place. [2024-02-20 11:46:22,337 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 369 selfloop transitions, 102 changer transitions 181/653 dead transitions. [2024-02-20 11:46:22,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 653 transitions, 74627 flow [2024-02-20 11:46:22,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-20 11:46:22,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-20 11:46:22,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 171 transitions. [2024-02-20 11:46:22,338 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.32325141776937616 [2024-02-20 11:46:22,338 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 574 predicate places. [2024-02-20 11:46:22,339 INFO L507 AbstractCegarLoop]: Abstraction has has 597 places, 653 transitions, 74627 flow [2024-02-20 11:46:22,340 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.7317073170731705) internal successors, (194), 41 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:22,340 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:46:22,340 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:46:22,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-02-20 11:46:22,552 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-02-20 11:46:22,552 INFO L432 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:46:22,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:46:22,552 INFO L85 PathProgramCache]: Analyzing trace with hash 579727020, now seen corresponding path program 48 times [2024-02-20 11:46:22,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:46:22,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215353393] [2024-02-20 11:46:22,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:46:22,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:46:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-20 11:46:23,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:46:23,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215353393] [2024-02-20 11:46:23,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215353393] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:46:23,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067342011] [2024-02-20 11:46:23,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:46:23,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:23,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:46:23,134 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:46:23,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-02-20 11:46:23,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 11:46:23,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:46:23,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 38 conjunts are in the unsatisfiable core [2024-02-20 11:46:23,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:46:23,512 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:46:23,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-02-20 11:46:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:23,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:46:23,778 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:46:23,779 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 154 treesize of output 119 [2024-02-20 11:46:24,007 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:24,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067342011] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:46:24,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:46:24,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 26 [2024-02-20 11:46:24,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041137816] [2024-02-20 11:46:24,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:46:24,007 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-20 11:46:24,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:46:24,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-20 11:46:24,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2024-02-20 11:46:24,008 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:46:24,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 653 transitions, 74627 flow. Second operand has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:24,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:46:24,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:46:24,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:46:25,277 INFO L124 PetriNetUnfolderBase]: 735/1402 cut-off events. [2024-02-20 11:46:25,277 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2024-02-20 11:46:25,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81216 conditions, 1402 events. 735/1402 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 8073 event pairs, 0 based on Foata normal form. 2/1140 useless extension candidates. Maximal degree in co-relation 60802. Up to 1395 conditions per place. [2024-02-20 11:46:25,317 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 429 selfloop transitions, 94 changer transitions 183/707 dead transitions. [2024-02-20 11:46:25,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 707 transitions, 82219 flow [2024-02-20 11:46:25,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-02-20 11:46:25,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-02-20 11:46:25,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 208 transitions. [2024-02-20 11:46:25,318 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3617391304347826 [2024-02-20 11:46:25,318 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 598 predicate places. [2024-02-20 11:46:25,318 INFO L507 AbstractCegarLoop]: Abstraction has has 621 places, 707 transitions, 82219 flow [2024-02-20 11:46:25,318 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:25,318 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:46:25,319 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:46:25,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2024-02-20 11:46:25,529 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-02-20 11:46:25,529 INFO L432 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:46:25,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:46:25,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1318495372, now seen corresponding path program 49 times [2024-02-20 11:46:25,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:46:25,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311949921] [2024-02-20 11:46:25,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:46:25,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:46:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-20 11:46:26,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:46:26,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311949921] [2024-02-20 11:46:26,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311949921] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:46:26,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753527167] [2024-02-20 11:46:26,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:46:26,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:26,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:46:26,266 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:46:26,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-02-20 11:46:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:26,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-20 11:46:26,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:46:26,609 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:46:26,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-02-20 11:46:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:26,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:46:26,987 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-20 11:46:26,987 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 181 treesize of output 113 [2024-02-20 11:46:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:27,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753527167] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:46:27,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:46:27,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 32 [2024-02-20 11:46:27,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799683498] [2024-02-20 11:46:27,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:46:27,039 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-02-20 11:46:27,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:46:27,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-02-20 11:46:27,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2024-02-20 11:46:27,040 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:46:27,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 707 transitions, 82219 flow. Second operand has 32 states, 32 states have (on average 4.75) internal successors, (152), 32 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:27,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:46:27,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:46:27,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:46:28,597 INFO L124 PetriNetUnfolderBase]: 757/1446 cut-off events. [2024-02-20 11:46:28,597 INFO L125 PetriNetUnfolderBase]: For 191/191 co-relation queries the response was YES. [2024-02-20 11:46:28,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85216 conditions, 1446 events. 757/1446 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 8451 event pairs, 0 based on Foata normal form. 2/1170 useless extension candidates. Maximal degree in co-relation 63384. Up to 1439 conditions per place. [2024-02-20 11:46:28,639 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 462 selfloop transitions, 74 changer transitions 187/724 dead transitions. [2024-02-20 11:46:28,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 724 transitions, 85649 flow [2024-02-20 11:46:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-20 11:46:28,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-20 11:46:28,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 146 transitions. [2024-02-20 11:46:28,640 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3340961098398169 [2024-02-20 11:46:28,640 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 616 predicate places. [2024-02-20 11:46:28,640 INFO L507 AbstractCegarLoop]: Abstraction has has 639 places, 724 transitions, 85649 flow [2024-02-20 11:46:28,640 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.75) internal successors, (152), 32 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:28,640 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:46:28,641 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:46:28,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-02-20 11:46:28,856 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-02-20 11:46:28,856 INFO L432 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:46:28,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:46:28,856 INFO L85 PathProgramCache]: Analyzing trace with hash -377581652, now seen corresponding path program 50 times [2024-02-20 11:46:28,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:46:28,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260782511] [2024-02-20 11:46:28,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:46:28,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:46:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:29,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:46:29,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260782511] [2024-02-20 11:46:29,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260782511] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:46:29,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269758888] [2024-02-20 11:46:29,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:46:29,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:29,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:46:29,304 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:46:29,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-02-20 11:46:29,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:46:29,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:46:29,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 45 conjunts are in the unsatisfiable core [2024-02-20 11:46:29,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:46:29,686 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:46:29,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-02-20 11:46:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-20 11:46:29,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:46:29,998 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-20 11:46:29,998 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 173 treesize of output 107 [2024-02-20 11:46:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:30,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269758888] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:46:30,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:46:30,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 26 [2024-02-20 11:46:30,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757925199] [2024-02-20 11:46:30,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:46:30,097 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-20 11:46:30,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:46:30,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-20 11:46:30,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2024-02-20 11:46:30,097 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:46:30,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 639 places, 724 transitions, 85649 flow. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 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) [2024-02-20 11:46:30,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:46:30,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:46:30,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:46:31,738 INFO L124 PetriNetUnfolderBase]: 821/1564 cut-off events. [2024-02-20 11:46:31,738 INFO L125 PetriNetUnfolderBase]: For 201/201 co-relation queries the response was YES. [2024-02-20 11:46:31,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93691 conditions, 1564 events. 821/1564 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 9095 event pairs, 0 based on Foata normal form. 3/1249 useless extension candidates. Maximal degree in co-relation 69258. Up to 1556 conditions per place. [2024-02-20 11:46:31,785 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 487 selfloop transitions, 80 changer transitions 195/763 dead transitions. [2024-02-20 11:46:31,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 763 transitions, 91802 flow [2024-02-20 11:46:31,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-20 11:46:31,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-20 11:46:31,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 208 transitions. [2024-02-20 11:46:31,786 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3931947069943289 [2024-02-20 11:46:31,786 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 638 predicate places. [2024-02-20 11:46:31,786 INFO L507 AbstractCegarLoop]: Abstraction has has 661 places, 763 transitions, 91802 flow [2024-02-20 11:46:31,787 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 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) [2024-02-20 11:46:31,787 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:46:31,787 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:46:31,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2024-02-20 11:46:31,998 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-02-20 11:46:31,998 INFO L432 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:46:32,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:46:32,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1453467700, now seen corresponding path program 51 times [2024-02-20 11:46:32,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:46:32,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083499363] [2024-02-20 11:46:32,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:46:32,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:46:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:46:32,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:46:32,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083499363] [2024-02-20 11:46:32,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083499363] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:46:32,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51091908] [2024-02-20 11:46:32,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:46:32,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:32,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:46:32,840 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:46:32,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-02-20 11:46:33,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 11:46:33,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:46:33,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 41 conjunts are in the unsatisfiable core [2024-02-20 11:46:33,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:46:33,210 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:46:33,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-02-20 11:46:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-20 11:46:33,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:46:33,470 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-20 11:46:33,471 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 173 treesize of output 107 [2024-02-20 11:46:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:33,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51091908] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:46:33,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:46:33,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 10] total 32 [2024-02-20 11:46:33,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633611829] [2024-02-20 11:46:33,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:46:33,547 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-02-20 11:46:33,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:46:33,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-02-20 11:46:33,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2024-02-20 11:46:33,548 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:46:33,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 661 places, 763 transitions, 91802 flow. Second operand has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:33,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:46:33,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:46:33,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:46:35,353 INFO L124 PetriNetUnfolderBase]: 825/1582 cut-off events. [2024-02-20 11:46:35,353 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2024-02-20 11:46:35,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96352 conditions, 1582 events. 825/1582 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 9264 event pairs, 0 based on Foata normal form. 2/1262 useless extension candidates. Maximal degree in co-relation 71144. Up to 1574 conditions per place. [2024-02-20 11:46:35,401 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 476 selfloop transitions, 93 changer transitions 206/776 dead transitions. [2024-02-20 11:46:35,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 685 places, 776 transitions, 94924 flow [2024-02-20 11:46:35,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-02-20 11:46:35,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-02-20 11:46:35,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 204 transitions. [2024-02-20 11:46:35,402 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.35478260869565215 [2024-02-20 11:46:35,403 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 662 predicate places. [2024-02-20 11:46:35,403 INFO L507 AbstractCegarLoop]: Abstraction has has 685 places, 776 transitions, 94924 flow [2024-02-20 11:46:35,403 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:35,403 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:46:35,403 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:46:35,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2024-02-20 11:46:35,615 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:35,615 INFO L432 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:46:35,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:46:35,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1427602612, now seen corresponding path program 52 times [2024-02-20 11:46:35,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:46:35,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916071688] [2024-02-20 11:46:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:46:35,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:46:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-20 11:46:36,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:46:36,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916071688] [2024-02-20 11:46:36,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916071688] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:46:36,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516995517] [2024-02-20 11:46:36,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:46:36,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:36,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:46:36,332 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:46:36,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-02-20 11:46:36,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:46:36,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:46:36,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-20 11:46:36,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:46:36,734 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:46:36,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-02-20 11:46:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:36,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:46:37,136 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-20 11:46:37,137 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 181 treesize of output 113 [2024-02-20 11:46:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:37,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516995517] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:46:37,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:46:37,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 33 [2024-02-20 11:46:37,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479226799] [2024-02-20 11:46:37,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:46:37,212 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-02-20 11:46:37,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:46:37,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-02-20 11:46:37,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2024-02-20 11:46:37,213 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:46:37,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 685 places, 776 transitions, 94924 flow. Second operand has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 33 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:37,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:46:37,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:46:37,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:46:39,359 INFO L124 PetriNetUnfolderBase]: 900/1721 cut-off events. [2024-02-20 11:46:39,359 INFO L125 PetriNetUnfolderBase]: For 249/249 co-relation queries the response was YES. [2024-02-20 11:46:39,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106500 conditions, 1721 events. 900/1721 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 10273 event pairs, 0 based on Foata normal form. 2/1359 useless extension candidates. Maximal degree in co-relation 78076. Up to 1712 conditions per place. [2024-02-20 11:46:39,406 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 548 selfloop transitions, 67 changer transitions 215/831 dead transitions. [2024-02-20 11:46:39,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 831 transitions, 103327 flow [2024-02-20 11:46:39,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-20 11:46:39,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-20 11:46:39,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 198 transitions. [2024-02-20 11:46:39,407 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3311036789297659 [2024-02-20 11:46:39,407 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 687 predicate places. [2024-02-20 11:46:39,407 INFO L507 AbstractCegarLoop]: Abstraction has has 710 places, 831 transitions, 103327 flow [2024-02-20 11:46:39,408 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 33 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:39,408 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:46:39,408 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:46:39,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2024-02-20 11:46:39,619 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:39,620 INFO L432 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:46:39,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:46:39,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1358336370, now seen corresponding path program 53 times [2024-02-20 11:46:39,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:46:39,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716325169] [2024-02-20 11:46:39,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:46:39,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:46:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-20 11:46:40,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:46:40,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716325169] [2024-02-20 11:46:40,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716325169] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:46:40,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821730867] [2024-02-20 11:46:40,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:46:40,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:40,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:46:40,260 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:46:40,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-02-20 11:46:40,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 11:46:40,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:46:40,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 35 conjunts are in the unsatisfiable core [2024-02-20 11:46:40,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:46:40,711 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:46:40,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2024-02-20 11:46:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:40,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:46:41,063 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-20 11:46:41,064 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 179 treesize of output 113 [2024-02-20 11:46:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:41,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821730867] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:46:41,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:46:41,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 10] total 35 [2024-02-20 11:46:41,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058360417] [2024-02-20 11:46:41,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:46:41,137 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-02-20 11:46:41,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:46:41,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-02-20 11:46:41,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2024-02-20 11:46:41,138 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:46:41,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 710 places, 831 transitions, 103327 flow. Second operand has 35 states, 35 states have (on average 4.857142857142857) internal successors, (170), 35 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:41,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:46:41,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:46:41,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:46:43,179 INFO L124 PetriNetUnfolderBase]: 918/1768 cut-off events. [2024-02-20 11:46:43,180 INFO L125 PetriNetUnfolderBase]: For 260/260 co-relation queries the response was YES. [2024-02-20 11:46:43,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111123 conditions, 1768 events. 918/1768 cut-off events. For 260/260 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 10693 event pairs, 2 based on Foata normal form. 2/1394 useless extension candidates. Maximal degree in co-relation 80469. Up to 1758 conditions per place. [2024-02-20 11:46:43,233 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 562 selfloop transitions, 71 changer transitions 225/859 dead transitions. [2024-02-20 11:46:43,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 733 places, 859 transitions, 108539 flow [2024-02-20 11:46:43,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-20 11:46:43,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-20 11:46:43,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 190 transitions. [2024-02-20 11:46:43,234 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3442028985507246 [2024-02-20 11:46:43,235 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 710 predicate places. [2024-02-20 11:46:43,235 INFO L507 AbstractCegarLoop]: Abstraction has has 733 places, 859 transitions, 108539 flow [2024-02-20 11:46:43,235 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.857142857142857) internal successors, (170), 35 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:43,235 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:46:43,235 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:46:43,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2024-02-20 11:46:43,447 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:43,447 INFO L432 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:46:43,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:46:43,447 INFO L85 PathProgramCache]: Analyzing trace with hash -43050806, now seen corresponding path program 54 times [2024-02-20 11:46:43,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:46:43,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614232618] [2024-02-20 11:46:43,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:46:43,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:46:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:44,690 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:46:44,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:46:44,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614232618] [2024-02-20 11:46:44,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614232618] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:46:44,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069591260] [2024-02-20 11:46:44,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:46:44,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:44,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:46:44,692 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:46:44,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-02-20 11:46:44,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 11:46:44,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:46:44,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-20 11:46:44,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:46:45,104 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:46:45,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-02-20 11:46:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:45,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:46:45,385 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-20 11:46:45,386 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 181 treesize of output 113 [2024-02-20 11:46:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:45,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069591260] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:46:45,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:46:45,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 10] total 38 [2024-02-20 11:46:45,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834155655] [2024-02-20 11:46:45,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:46:45,460 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-02-20 11:46:45,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:46:45,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-02-20 11:46:45,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2024-02-20 11:46:45,461 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:46:45,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 733 places, 859 transitions, 108539 flow. Second operand has 38 states, 38 states have (on average 4.684210526315789) internal successors, (178), 38 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:45,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:46:45,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:46:45,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:46:47,696 INFO L124 PetriNetUnfolderBase]: 936/1813 cut-off events. [2024-02-20 11:46:47,696 INFO L125 PetriNetUnfolderBase]: For 273/273 co-relation queries the response was YES. [2024-02-20 11:46:47,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115773 conditions, 1813 events. 936/1813 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 11095 event pairs, 0 based on Foata normal form. 2/1427 useless extension candidates. Maximal degree in co-relation 82898. Up to 1803 conditions per place. [2024-02-20 11:46:47,740 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 573 selfloop transitions, 71 changer transitions 235/880 dead transitions. [2024-02-20 11:46:47,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 758 places, 880 transitions, 112964 flow [2024-02-20 11:46:47,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-20 11:46:47,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-20 11:46:47,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 202 transitions. [2024-02-20 11:46:47,742 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3377926421404682 [2024-02-20 11:46:47,742 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 735 predicate places. [2024-02-20 11:46:47,742 INFO L507 AbstractCegarLoop]: Abstraction has has 758 places, 880 transitions, 112964 flow [2024-02-20 11:46:47,742 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.684210526315789) internal successors, (178), 38 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:47,742 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:46:47,742 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:46:47,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-02-20 11:46:47,954 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2024-02-20 11:46:47,954 INFO L432 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:46:47,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:46:47,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1147820112, now seen corresponding path program 55 times [2024-02-20 11:46:47,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:46:47,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560327649] [2024-02-20 11:46:47,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:46:47,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:46:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:48,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:46:48,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560327649] [2024-02-20 11:46:48,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560327649] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:46:48,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274965033] [2024-02-20 11:46:48,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:46:48,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:48,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:46:48,504 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:46:48,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-02-20 11:46:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:48,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-20 11:46:48,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:46:48,874 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:46:48,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-02-20 11:46:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:48,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:46:49,212 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-20 11:46:49,212 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 179 treesize of output 113 [2024-02-20 11:46:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:49,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274965033] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:46:49,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:46:49,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-02-20 11:46:49,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190247775] [2024-02-20 11:46:49,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:46:49,290 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-02-20 11:46:49,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:46:49,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-02-20 11:46:49,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2024-02-20 11:46:49,294 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:46:49,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 758 places, 880 transitions, 112964 flow. Second operand has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:49,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:46:49,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:46:49,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:46:51,451 INFO L124 PetriNetUnfolderBase]: 1024/1971 cut-off events. [2024-02-20 11:46:51,451 INFO L125 PetriNetUnfolderBase]: For 277/277 co-relation queries the response was YES. [2024-02-20 11:46:51,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127797 conditions, 1971 events. 1024/1971 cut-off events. For 277/277 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 12253 event pairs, 4 based on Foata normal form. 3/1538 useless extension candidates. Maximal degree in co-relation 91993. Up to 1960 conditions per place. [2024-02-20 11:46:51,503 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 644 selfloop transitions, 55 changer transitions 238/938 dead transitions. [2024-02-20 11:46:51,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 777 places, 938 transitions, 122286 flow [2024-02-20 11:46:51,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-20 11:46:51,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-20 11:46:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 158 transitions. [2024-02-20 11:46:51,505 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.34347826086956523 [2024-02-20 11:46:51,505 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 754 predicate places. [2024-02-20 11:46:51,505 INFO L507 AbstractCegarLoop]: Abstraction has has 777 places, 938 transitions, 122286 flow [2024-02-20 11:46:51,505 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:51,505 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:46:51,505 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:46:51,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2024-02-20 11:46:51,716 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2024-02-20 11:46:51,716 INFO L432 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:46:51,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:46:51,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1729885200, now seen corresponding path program 56 times [2024-02-20 11:46:51,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:46:51,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573402899] [2024-02-20 11:46:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:46:51,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:46:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:52,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:46:52,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573402899] [2024-02-20 11:46:52,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573402899] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:46:52,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545946171] [2024-02-20 11:46:52,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:46:52,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:52,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:46:52,184 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:46:52,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-02-20 11:46:52,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:46:52,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:46:52,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 45 conjunts are in the unsatisfiable core [2024-02-20 11:46:52,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:46:52,594 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:46:52,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-02-20 11:46:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-20 11:46:52,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:46:52,881 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-20 11:46:52,881 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 173 treesize of output 107 [2024-02-20 11:46:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:52,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545946171] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:46:52,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:46:52,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 27 [2024-02-20 11:46:52,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924217802] [2024-02-20 11:46:52,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:46:52,970 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-02-20 11:46:52,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:46:52,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-02-20 11:46:52,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2024-02-20 11:46:52,971 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:46:52,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 777 places, 938 transitions, 122286 flow. Second operand has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:52,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:46:52,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:46:52,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:46:55,268 INFO L124 PetriNetUnfolderBase]: 1080/2086 cut-off events. [2024-02-20 11:46:55,268 INFO L125 PetriNetUnfolderBase]: For 301/301 co-relation queries the response was YES. [2024-02-20 11:46:55,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137234 conditions, 2086 events. 1080/2086 cut-off events. For 301/301 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 13187 event pairs, 4 based on Foata normal form. 3/1617 useless extension candidates. Maximal degree in co-relation 98160. Up to 2073 conditions per place. [2024-02-20 11:46:55,327 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 683 selfloop transitions, 53 changer transitions 243/980 dead transitions. [2024-02-20 11:46:55,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 980 transitions, 129734 flow [2024-02-20 11:46:55,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-20 11:46:55,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-20 11:46:55,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 170 transitions. [2024-02-20 11:46:55,329 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3695652173913043 [2024-02-20 11:46:55,329 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 773 predicate places. [2024-02-20 11:46:55,329 INFO L507 AbstractCegarLoop]: Abstraction has has 796 places, 980 transitions, 129734 flow [2024-02-20 11:46:55,329 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:55,329 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:46:55,329 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:46:55,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-02-20 11:46:55,541 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:55,541 INFO L432 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:46:55,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:46:55,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1953535206, now seen corresponding path program 57 times [2024-02-20 11:46:55,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:46:55,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610493584] [2024-02-20 11:46:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:46:55,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:46:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:46:56,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:46:56,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610493584] [2024-02-20 11:46:56,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610493584] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:46:56,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054669288] [2024-02-20 11:46:56,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:46:56,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:56,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:46:56,708 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:46:56,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-02-20 11:46:57,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 11:46:57,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:46:57,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 41 conjunts are in the unsatisfiable core [2024-02-20 11:46:57,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:46:57,151 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:46:57,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-02-20 11:46:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-20 11:46:57,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:46:57,499 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-20 11:46:57,500 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 173 treesize of output 107 [2024-02-20 11:46:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:46:57,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054669288] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:46:57,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:46:57,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 10] total 39 [2024-02-20 11:46:57,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042144604] [2024-02-20 11:46:57,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:46:57,622 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-02-20 11:46:57,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:46:57,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-02-20 11:46:57,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1304, Unknown=0, NotChecked=0, Total=1482 [2024-02-20 11:46:57,623 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:46:57,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 796 places, 980 transitions, 129734 flow. Second operand has 39 states, 39 states have (on average 4.666666666666667) internal successors, (182), 39 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:57,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:46:57,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:46:57,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:47:00,292 INFO L124 PetriNetUnfolderBase]: 1144/2204 cut-off events. [2024-02-20 11:47:00,292 INFO L125 PetriNetUnfolderBase]: For 325/325 co-relation queries the response was YES. [2024-02-20 11:47:00,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147162 conditions, 2204 events. 1144/2204 cut-off events. For 325/325 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 13932 event pairs, 4 based on Foata normal form. 3/1695 useless extension candidates. Maximal degree in co-relation 105007. Up to 2190 conditions per place. [2024-02-20 11:47:00,363 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 708 selfloop transitions, 56 changer transitions 251/1016 dead transitions. [2024-02-20 11:47:00,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 820 places, 1016 transitions, 136540 flow [2024-02-20 11:47:00,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-02-20 11:47:00,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-02-20 11:47:00,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 195 transitions. [2024-02-20 11:47:00,364 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3391304347826087 [2024-02-20 11:47:00,364 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 797 predicate places. [2024-02-20 11:47:00,364 INFO L507 AbstractCegarLoop]: Abstraction has has 820 places, 1016 transitions, 136540 flow [2024-02-20 11:47:00,364 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.666666666666667) internal successors, (182), 39 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:47:00,365 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:47:00,365 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:47:00,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2024-02-20 11:47:00,567 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:47:00,567 INFO L432 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:47:00,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:47:00,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1415679628, now seen corresponding path program 58 times [2024-02-20 11:47:00,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:47:00,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250689709] [2024-02-20 11:47:00,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:47:00,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:47:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:47:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:01,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:47:01,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250689709] [2024-02-20 11:47:01,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250689709] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:47:01,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766891865] [2024-02-20 11:47:01,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:47:01,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:47:01,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:47:01,008 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:47:01,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-02-20 11:47:01,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:47:01,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:47:01,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-20 11:47:01,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:47:01,390 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:47:01,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-02-20 11:47:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:01,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:47:01,760 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-20 11:47:01,761 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 181 treesize of output 113 [2024-02-20 11:47:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:01,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766891865] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:47:01,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:47:01,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-02-20 11:47:01,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505591412] [2024-02-20 11:47:01,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:47:01,953 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-02-20 11:47:01,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:47:01,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-02-20 11:47:01,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2024-02-20 11:47:01,953 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:47:01,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 820 places, 1016 transitions, 136540 flow. Second operand has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:47:01,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:47:01,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:47:01,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:47:04,589 INFO L124 PetriNetUnfolderBase]: 1151/2236 cut-off events. [2024-02-20 11:47:04,590 INFO L125 PetriNetUnfolderBase]: For 327/327 co-relation queries the response was YES. [2024-02-20 11:47:04,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151470 conditions, 2236 events. 1151/2236 cut-off events. For 327/327 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14299 event pairs, 2 based on Foata normal form. 2/1720 useless extension candidates. Maximal degree in co-relation 108002. Up to 2221 conditions per place. [2024-02-20 11:47:04,662 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 724 selfloop transitions, 53 changer transitions 261/1039 dead transitions. [2024-02-20 11:47:04,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 840 places, 1039 transitions, 141716 flow [2024-02-20 11:47:04,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-02-20 11:47:04,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-02-20 11:47:04,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 162 transitions. [2024-02-20 11:47:04,664 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.33540372670807456 [2024-02-20 11:47:04,664 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 817 predicate places. [2024-02-20 11:47:04,664 INFO L507 AbstractCegarLoop]: Abstraction has has 840 places, 1039 transitions, 141716 flow [2024-02-20 11:47:04,664 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:47:04,664 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:47:04,664 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:47:04,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2024-02-20 11:47:04,880 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-02-20 11:47:04,880 INFO L432 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:47:04,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:47:04,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1280870466, now seen corresponding path program 59 times [2024-02-20 11:47:04,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:47:04,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617632802] [2024-02-20 11:47:04,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:47:04,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:47:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:47:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:05,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:47:05,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617632802] [2024-02-20 11:47:05,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617632802] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:47:05,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131073944] [2024-02-20 11:47:05,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:47:05,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:47:05,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:47:05,422 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:47:05,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-02-20 11:47:05,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 11:47:05,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:47:05,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 35 conjunts are in the unsatisfiable core [2024-02-20 11:47:05,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:47:05,911 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:47:05,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2024-02-20 11:47:05,934 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:05,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:47:06,220 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-20 11:47:06,220 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 179 treesize of output 113 [2024-02-20 11:47:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:06,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131073944] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:47:06,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:47:06,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 30 [2024-02-20 11:47:06,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261666806] [2024-02-20 11:47:06,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:47:06,310 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-02-20 11:47:06,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:47:06,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-02-20 11:47:06,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2024-02-20 11:47:06,311 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:47:06,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 840 places, 1039 transitions, 141716 flow. Second operand has 30 states, 30 states have (on average 5.033333333333333) internal successors, (151), 30 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:47:06,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:47:06,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:47:06,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:47:08,969 INFO L124 PetriNetUnfolderBase]: 1239/2394 cut-off events. [2024-02-20 11:47:08,969 INFO L125 PetriNetUnfolderBase]: For 345/345 co-relation queries the response was YES. [2024-02-20 11:47:08,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164540 conditions, 2394 events. 1239/2394 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 15481 event pairs, 6 based on Foata normal form. 3/1831 useless extension candidates. Maximal degree in co-relation 117870. Up to 2378 conditions per place. [2024-02-20 11:47:09,050 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 769 selfloop transitions, 69 changer transitions 268/1107 dead transitions. [2024-02-20 11:47:09,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 860 places, 1107 transitions, 153203 flow [2024-02-20 11:47:09,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-02-20 11:47:09,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-02-20 11:47:09,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 163 transitions. [2024-02-20 11:47:09,052 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.33747412008281574 [2024-02-20 11:47:09,052 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 837 predicate places. [2024-02-20 11:47:09,052 INFO L507 AbstractCegarLoop]: Abstraction has has 860 places, 1107 transitions, 153203 flow [2024-02-20 11:47:09,052 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.033333333333333) internal successors, (151), 30 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:47:09,053 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:47:09,053 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:47:09,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2024-02-20 11:47:09,256 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-02-20 11:47:09,257 INFO L432 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:47:09,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:47:09,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1070354208, now seen corresponding path program 60 times [2024-02-20 11:47:09,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:47:09,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137847910] [2024-02-20 11:47:09,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:47:09,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:47:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:47:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:09,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:47:09,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137847910] [2024-02-20 11:47:09,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137847910] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:47:09,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901778611] [2024-02-20 11:47:09,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:47:09,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:47:09,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:47:09,642 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:47:09,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-02-20 11:47:09,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-20 11:47:09,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:47:09,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-20 11:47:09,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:47:10,222 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:47:10,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-02-20 11:47:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:10,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:47:10,577 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-20 11:47:10,578 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 179 treesize of output 113 [2024-02-20 11:47:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:10,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901778611] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:47:10,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:47:10,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 23 [2024-02-20 11:47:10,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168880450] [2024-02-20 11:47:10,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:47:10,651 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-20 11:47:10,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:47:10,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-20 11:47:10,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-02-20 11:47:10,652 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:47:10,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 860 places, 1107 transitions, 153203 flow. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:47:10,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:47:10,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:47:10,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:47:13,503 INFO L124 PetriNetUnfolderBase]: 1311/2526 cut-off events. [2024-02-20 11:47:13,504 INFO L125 PetriNetUnfolderBase]: For 376/376 co-relation queries the response was YES. [2024-02-20 11:47:13,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176105 conditions, 2526 events. 1311/2526 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 16483 event pairs, 2 based on Foata normal form. 3/1921 useless extension candidates. Maximal degree in co-relation 125878. Up to 2509 conditions per place. [2024-02-20 11:47:13,591 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 819 selfloop transitions, 62 changer transitions 276/1158 dead transitions. [2024-02-20 11:47:13,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 878 places, 1158 transitions, 162585 flow [2024-02-20 11:47:13,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-20 11:47:13,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-20 11:47:13,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 164 transitions. [2024-02-20 11:47:13,592 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.37528604118993136 [2024-02-20 11:47:13,592 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 855 predicate places. [2024-02-20 11:47:13,593 INFO L507 AbstractCegarLoop]: Abstraction has has 878 places, 1158 transitions, 162585 flow [2024-02-20 11:47:13,593 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:47:13,593 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:47:13,594 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:47:13,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2024-02-20 11:47:13,798 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:47:13,798 INFO L432 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:47:13,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:47:13,799 INFO L85 PathProgramCache]: Analyzing trace with hash 2048025560, now seen corresponding path program 61 times [2024-02-20 11:47:13,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:47:13,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930490770] [2024-02-20 11:47:13,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:47:13,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:47:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:47:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:47:15,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:47:15,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930490770] [2024-02-20 11:47:15,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930490770] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:47:15,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211521601] [2024-02-20 11:47:15,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:47:15,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:47:15,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:47:15,292 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:47:15,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-02-20 11:47:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:47:15,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-20 11:47:15,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:47:15,712 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:47:15,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-02-20 11:47:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:15,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:47:16,067 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-02-20 11:47:16,068 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 134 treesize of output 83 [2024-02-20 11:47:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:16,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211521601] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:47:16,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:47:16,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10, 10] total 37 [2024-02-20 11:47:16,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045050577] [2024-02-20 11:47:16,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:47:16,091 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-02-20 11:47:16,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:47:16,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-02-20 11:47:16,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2024-02-20 11:47:16,092 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:47:16,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 878 places, 1158 transitions, 162585 flow. Second operand has 37 states, 37 states have (on average 4.621621621621622) internal successors, (171), 37 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:47:16,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:47:16,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:47:16,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:47:19,866 INFO L124 PetriNetUnfolderBase]: 1402/2695 cut-off events. [2024-02-20 11:47:19,866 INFO L125 PetriNetUnfolderBase]: For 389/389 co-relation queries the response was YES. [2024-02-20 11:47:19,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190485 conditions, 2695 events. 1402/2695 cut-off events. For 389/389 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 17765 event pairs, 2 based on Foata normal form. 1/2044 useless extension candidates. Maximal degree in co-relation 137119. Up to 2676 conditions per place. [2024-02-20 11:47:19,958 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 786 selfloop transitions, 160 changer transitions 278/1225 dead transitions. [2024-02-20 11:47:19,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 903 places, 1225 transitions, 174431 flow [2024-02-20 11:47:19,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-20 11:47:19,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-20 11:47:19,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 169 transitions. [2024-02-20 11:47:19,959 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.2826086956521739 [2024-02-20 11:47:19,959 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 880 predicate places. [2024-02-20 11:47:19,959 INFO L507 AbstractCegarLoop]: Abstraction has has 903 places, 1225 transitions, 174431 flow [2024-02-20 11:47:19,959 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.621621621621622) internal successors, (171), 37 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:47:19,960 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:47:19,960 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:47:19,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2024-02-20 11:47:20,171 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-02-20 11:47:20,172 INFO L432 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:47:20,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:47:20,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1205151644, now seen corresponding path program 62 times [2024-02-20 11:47:20,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:47:20,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973017763] [2024-02-20 11:47:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:47:20,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:47:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:47:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:20,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:47:20,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973017763] [2024-02-20 11:47:20,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973017763] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:47:20,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224121660] [2024-02-20 11:47:20,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:47:20,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:47:20,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:47:20,819 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:47:20,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-02-20 11:47:21,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:47:21,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:47:21,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 41 conjunts are in the unsatisfiable core [2024-02-20 11:47:21,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:47:21,249 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:47:21,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-02-20 11:47:21,286 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-20 11:47:21,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:47:21,514 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-20 11:47:21,514 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 173 treesize of output 107 [2024-02-20 11:47:21,601 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:21,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224121660] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:47:21,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:47:21,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 27 [2024-02-20 11:47:21,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289468874] [2024-02-20 11:47:21,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:47:21,602 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-02-20 11:47:21,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:47:21,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-02-20 11:47:21,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2024-02-20 11:47:21,603 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:47:21,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 903 places, 1225 transitions, 174431 flow. Second operand has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:47:21,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:47:21,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:47:21,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:47:25,933 INFO L124 PetriNetUnfolderBase]: 1472/2830 cut-off events. [2024-02-20 11:47:25,934 INFO L125 PetriNetUnfolderBase]: For 416/416 co-relation queries the response was YES. [2024-02-20 11:47:25,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202757 conditions, 2830 events. 1472/2830 cut-off events. For 416/416 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 18802 event pairs, 6 based on Foata normal form. 3/2137 useless extension candidates. Maximal degree in co-relation 145242. Up to 2809 conditions per place. [2024-02-20 11:47:26,016 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 926 selfloop transitions, 58 changer transitions 289/1274 dead transitions. [2024-02-20 11:47:26,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 922 places, 1274 transitions, 183971 flow [2024-02-20 11:47:26,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-20 11:47:26,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-20 11:47:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 171 transitions. [2024-02-20 11:47:26,017 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3717391304347826 [2024-02-20 11:47:26,017 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 899 predicate places. [2024-02-20 11:47:26,017 INFO L507 AbstractCegarLoop]: Abstraction has has 922 places, 1274 transitions, 183971 flow [2024-02-20 11:47:26,018 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:47:26,018 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:47:26,018 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:47:26,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2024-02-20 11:47:26,229 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:47:26,230 INFO L432 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:47:26,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:47:26,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1729448838, now seen corresponding path program 63 times [2024-02-20 11:47:26,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:47:26,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62085114] [2024-02-20 11:47:26,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:47:26,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:47:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:47:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:26,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:47:26,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62085114] [2024-02-20 11:47:26,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62085114] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:47:26,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602559922] [2024-02-20 11:47:26,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:47:26,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:47:26,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:47:26,855 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:47:26,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-02-20 11:47:27,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 11:47:27,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:47:27,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-20 11:47:27,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:47:27,310 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:47:27,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-02-20 11:47:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:27,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:47:27,642 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-20 11:47:27,643 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 173 treesize of output 107 [2024-02-20 11:47:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:27,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602559922] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:47:27,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:47:27,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 26 [2024-02-20 11:47:27,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029476898] [2024-02-20 11:47:27,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:47:27,747 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-20 11:47:27,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:47:27,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-20 11:47:27,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2024-02-20 11:47:27,748 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:47:27,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 922 places, 1274 transitions, 183971 flow. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:47:27,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:47:27,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:47:27,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:47:31,774 INFO L124 PetriNetUnfolderBase]: 1520/2926 cut-off events. [2024-02-20 11:47:31,774 INFO L125 PetriNetUnfolderBase]: For 431/431 co-relation queries the response was YES. [2024-02-20 11:47:31,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212516 conditions, 2926 events. 1520/2926 cut-off events. For 431/431 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19610 event pairs, 6 based on Foata normal form. 2/2202 useless extension candidates. Maximal degree in co-relation 151931. Up to 2904 conditions per place. [2024-02-20 11:47:31,867 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 952 selfloop transitions, 65 changer transitions 301/1319 dead transitions. [2024-02-20 11:47:31,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 942 places, 1319 transitions, 193114 flow [2024-02-20 11:47:31,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-02-20 11:47:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-02-20 11:47:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 171 transitions. [2024-02-20 11:47:31,868 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.35403726708074534 [2024-02-20 11:47:31,868 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 919 predicate places. [2024-02-20 11:47:31,868 INFO L507 AbstractCegarLoop]: Abstraction has has 942 places, 1319 transitions, 193114 flow [2024-02-20 11:47:31,868 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:47:31,868 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:47:31,869 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:47:31,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2024-02-20 11:47:32,080 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:47:32,081 INFO L432 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:47:32,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:47:32,081 INFO L85 PathProgramCache]: Analyzing trace with hash 216065240, now seen corresponding path program 64 times [2024-02-20 11:47:32,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:47:32,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155899151] [2024-02-20 11:47:32,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:47:32,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:47:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:47:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:32,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:47:32,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155899151] [2024-02-20 11:47:32,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155899151] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:47:32,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241080477] [2024-02-20 11:47:32,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:47:32,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:47:32,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:47:32,660 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:47:32,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-02-20 11:47:32,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:47:32,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:47:32,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-20 11:47:32,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:47:33,071 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:47:33,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-02-20 11:47:33,101 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:33,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:47:33,390 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-20 11:47:33,391 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 173 treesize of output 107 [2024-02-20 11:47:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:33,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241080477] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:47:33,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:47:33,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-02-20 11:47:33,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654504469] [2024-02-20 11:47:33,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:47:33,466 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-02-20 11:47:33,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:47:33,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-02-20 11:47:33,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2024-02-20 11:47:33,466 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:47:33,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 942 places, 1319 transitions, 193114 flow. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:47:33,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:47:33,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:47:33,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:47:37,812 INFO L124 PetriNetUnfolderBase]: 1584/3046 cut-off events. [2024-02-20 11:47:37,812 INFO L125 PetriNetUnfolderBase]: For 443/443 co-relation queries the response was YES. [2024-02-20 11:47:37,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224169 conditions, 3046 events. 1584/3046 cut-off events. For 443/443 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20585 event pairs, 6 based on Foata normal form. 2/2282 useless extension candidates. Maximal degree in co-relation 159932. Up to 3022 conditions per place. [2024-02-20 11:47:37,913 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 942 selfloop transitions, 115 changer transitions 307/1365 dead transitions. [2024-02-20 11:47:37,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 963 places, 1365 transitions, 202585 flow [2024-02-20 11:47:37,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-20 11:47:37,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-20 11:47:37,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 196 transitions. [2024-02-20 11:47:37,936 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.38735177865612647 [2024-02-20 11:47:37,937 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 940 predicate places. [2024-02-20 11:47:37,937 INFO L507 AbstractCegarLoop]: Abstraction has has 963 places, 1365 transitions, 202585 flow [2024-02-20 11:47:37,937 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:47:37,937 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:47:37,937 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:47:37,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2024-02-20 11:47:38,149 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2024-02-20 11:47:38,149 INFO L432 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:47:38,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:47:38,149 INFO L85 PathProgramCache]: Analyzing trace with hash 395072186, now seen corresponding path program 65 times [2024-02-20 11:47:38,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:47:38,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300040797] [2024-02-20 11:47:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:47:38,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:47:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:47:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:47:39,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:47:39,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300040797] [2024-02-20 11:47:39,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300040797] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:47:39,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104155485] [2024-02-20 11:47:39,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:47:39,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:47:39,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:47:39,299 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:47:39,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-02-20 11:47:39,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 11:47:39,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:47:39,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 39 conjunts are in the unsatisfiable core [2024-02-20 11:47:39,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:47:39,828 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:47:39,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-02-20 11:47:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:39,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:47:40,169 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-20 11:47:40,169 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 179 treesize of output 113 [2024-02-20 11:47:40,256 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:40,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104155485] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:47:40,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:47:40,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 10] total 38 [2024-02-20 11:47:40,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826181699] [2024-02-20 11:47:40,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:47:40,257 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-02-20 11:47:40,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:47:40,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-02-20 11:47:40,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2024-02-20 11:47:40,258 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:47:40,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 963 places, 1365 transitions, 202585 flow. Second operand has 38 states, 38 states have (on average 4.7105263157894735) internal successors, (179), 38 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:47:40,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:47:40,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:47:40,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:47:44,683 INFO L124 PetriNetUnfolderBase]: 1594/3069 cut-off events. [2024-02-20 11:47:44,683 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2024-02-20 11:47:44,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228922 conditions, 3069 events. 1594/3069 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 20794 event pairs, 8 based on Foata normal form. 1/2298 useless extension candidates. Maximal degree in co-relation 163143. Up to 3045 conditions per place. [2024-02-20 11:47:44,799 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 957 selfloop transitions, 110 changer transitions 308/1376 dead transitions. [2024-02-20 11:47:44,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 981 places, 1376 transitions, 206969 flow [2024-02-20 11:47:44,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-20 11:47:44,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-20 11:47:44,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 133 transitions. [2024-02-20 11:47:44,800 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.30434782608695654 [2024-02-20 11:47:44,800 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 958 predicate places. [2024-02-20 11:47:44,801 INFO L507 AbstractCegarLoop]: Abstraction has has 981 places, 1376 transitions, 206969 flow [2024-02-20 11:47:44,801 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.7105263157894735) internal successors, (179), 38 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:47:44,801 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:47:44,801 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:47:44,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2024-02-20 11:47:45,002 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:47:45,002 INFO L432 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:47:45,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:47:45,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1709997126, now seen corresponding path program 66 times [2024-02-20 11:47:45,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:47:45,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631295749] [2024-02-20 11:47:45,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:47:45,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:47:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:47:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:45,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:47:45,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631295749] [2024-02-20 11:47:45,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631295749] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:47:45,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543747915] [2024-02-20 11:47:45,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:47:45,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:47:45,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:47:45,678 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:47:45,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-02-20 11:47:46,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 11:47:46,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:47:46,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-20 11:47:46,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:47:46,124 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:47:46,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-02-20 11:47:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:46,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:47:46,436 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-20 11:47:46,436 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 181 treesize of output 113 [2024-02-20 11:47:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:46,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543747915] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:47:46,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:47:46,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 25 [2024-02-20 11:47:46,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561162418] [2024-02-20 11:47:46,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:47:46,522 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-20 11:47:46,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:47:46,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-20 11:47:46,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2024-02-20 11:47:46,522 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:47:46,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 981 places, 1376 transitions, 206969 flow. Second operand has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:47:46,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:47:46,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:47:46,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:47:50,598 INFO L124 PetriNetUnfolderBase]: 1596/3078 cut-off events. [2024-02-20 11:47:50,598 INFO L125 PetriNetUnfolderBase]: For 452/452 co-relation queries the response was YES. [2024-02-20 11:47:50,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232656 conditions, 3078 events. 1596/3078 cut-off events. For 452/452 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 20861 event pairs, 6 based on Foata normal form. 1/2305 useless extension candidates. Maximal degree in co-relation 165774. Up to 3054 conditions per place. [2024-02-20 11:47:50,693 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 976 selfloop transitions, 92 changer transitions 314/1383 dead transitions. [2024-02-20 11:47:50,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 993 places, 1383 transitions, 210789 flow [2024-02-20 11:47:50,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-20 11:47:50,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-20 11:47:50,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 103 transitions. [2024-02-20 11:47:50,695 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.34448160535117056 [2024-02-20 11:47:50,695 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 970 predicate places. [2024-02-20 11:47:50,695 INFO L507 AbstractCegarLoop]: Abstraction has has 993 places, 1383 transitions, 210789 flow [2024-02-20 11:47:50,695 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:47:50,695 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:47:50,695 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:47:50,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2024-02-20 11:47:50,897 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:47:50,897 INFO L432 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:47:50,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:47:50,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1909327524, now seen corresponding path program 67 times [2024-02-20 11:47:50,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:47:50,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649132975] [2024-02-20 11:47:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:47:50,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:47:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:47:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:47:51,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:47:51,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649132975] [2024-02-20 11:47:51,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649132975] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:47:51,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44723484] [2024-02-20 11:47:51,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:47:51,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:47:51,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:47:51,923 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:47:51,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-02-20 11:47:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:47:52,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-20 11:47:52,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:47:52,284 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:47:52,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-02-20 11:47:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:52,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:47:52,635 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-20 11:47:52,636 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 181 treesize of output 113 [2024-02-20 11:47:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:52,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44723484] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:47:52,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:47:52,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10, 10] total 38 [2024-02-20 11:47:52,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844222638] [2024-02-20 11:47:52,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:47:52,710 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-02-20 11:47:52,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:47:52,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-02-20 11:47:52,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2024-02-20 11:47:52,711 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:47:52,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 993 places, 1383 transitions, 210789 flow. Second operand has 38 states, 38 states have (on average 4.605263157894737) internal successors, (175), 38 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:47:52,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:47:52,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:47:52,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:47:57,591 INFO L124 PetriNetUnfolderBase]: 1608/3108 cut-off events. [2024-02-20 11:47:57,592 INFO L125 PetriNetUnfolderBase]: For 456/456 co-relation queries the response was YES. [2024-02-20 11:47:57,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238029 conditions, 3108 events. 1608/3108 cut-off events. For 456/456 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 21233 event pairs, 4 based on Foata normal form. 2/2328 useless extension candidates. Maximal degree in co-relation 168879. Up to 3084 conditions per place. [2024-02-20 11:47:57,683 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 996 selfloop transitions, 79 changer transitions 322/1398 dead transitions. [2024-02-20 11:47:57,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1018 places, 1398 transitions, 215878 flow [2024-02-20 11:47:57,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-20 11:47:57,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-20 11:47:57,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 198 transitions. [2024-02-20 11:47:57,684 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3311036789297659 [2024-02-20 11:47:57,685 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 995 predicate places. [2024-02-20 11:47:57,685 INFO L507 AbstractCegarLoop]: Abstraction has has 1018 places, 1398 transitions, 215878 flow [2024-02-20 11:47:57,685 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.605263157894737) internal successors, (175), 38 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:47:57,685 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:47:57,685 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:47:57,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2024-02-20 11:47:57,897 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:47:57,897 INFO L432 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:47:57,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:47:57,898 INFO L85 PathProgramCache]: Analyzing trace with hash 981501638, now seen corresponding path program 68 times [2024-02-20 11:47:57,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:47:57,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516910425] [2024-02-20 11:47:57,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:47:57,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:47:57,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:47:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-20 11:47:58,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:47:58,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516910425] [2024-02-20 11:47:58,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516910425] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:47:58,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823514526] [2024-02-20 11:47:58,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:47:58,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:47:58,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:47:58,583 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:47:58,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-02-20 11:47:58,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:47:58,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:47:58,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 41 conjunts are in the unsatisfiable core [2024-02-20 11:47:58,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:47:59,000 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:47:59,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-02-20 11:47:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-20 11:47:59,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:47:59,266 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-20 11:47:59,267 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 173 treesize of output 107 [2024-02-20 11:47:59,345 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:47:59,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823514526] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:47:59,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:47:59,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 10] total 30 [2024-02-20 11:47:59,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953452032] [2024-02-20 11:47:59,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:47:59,346 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-02-20 11:47:59,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:47:59,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-02-20 11:47:59,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2024-02-20 11:47:59,347 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:47:59,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1018 places, 1398 transitions, 215878 flow. Second operand has 30 states, 30 states have (on average 4.9) internal successors, (147), 30 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:47:59,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:47:59,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:47:59,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:48:04,316 INFO L124 PetriNetUnfolderBase]: 1612/3126 cut-off events. [2024-02-20 11:48:04,316 INFO L125 PetriNetUnfolderBase]: For 478/478 co-relation queries the response was YES. [2024-02-20 11:48:04,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242524 conditions, 3126 events. 1612/3126 cut-off events. For 478/478 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 21433 event pairs, 10 based on Foata normal form. 2/2342 useless extension candidates. Maximal degree in co-relation 172008. Up to 3102 conditions per place. [2024-02-20 11:48:04,435 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 997 selfloop transitions, 81 changer transitions 332/1411 dead transitions. [2024-02-20 11:48:04,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1041 places, 1411 transitions, 220712 flow [2024-02-20 11:48:04,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-20 11:48:04,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-20 11:48:04,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 180 transitions. [2024-02-20 11:48:04,436 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.32608695652173914 [2024-02-20 11:48:04,437 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1018 predicate places. [2024-02-20 11:48:04,437 INFO L507 AbstractCegarLoop]: Abstraction has has 1041 places, 1411 transitions, 220712 flow [2024-02-20 11:48:04,437 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.9) internal successors, (147), 30 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:48:04,437 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:48:04,437 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:48:04,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2024-02-20 11:48:04,638 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2024-02-20 11:48:04,639 INFO L432 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:48:04,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:48:04,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1173373912, now seen corresponding path program 69 times [2024-02-20 11:48:04,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:48:04,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888086109] [2024-02-20 11:48:04,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:48:04,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:48:04,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:48:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:48:05,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:48:05,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888086109] [2024-02-20 11:48:05,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888086109] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:48:05,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022025256] [2024-02-20 11:48:05,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:48:05,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:48:05,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:48:05,689 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:48:05,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-02-20 11:48:06,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-20 11:48:06,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:48:06,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-20 11:48:06,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:48:06,141 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:48:06,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-02-20 11:48:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:48:06,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:48:06,451 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-20 11:48:06,451 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 173 treesize of output 107 [2024-02-20 11:48:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:48:06,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022025256] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:48:06,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:48:06,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 10] total 35 [2024-02-20 11:48:06,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543245546] [2024-02-20 11:48:06,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:48:06,553 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-02-20 11:48:06,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:48:06,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-02-20 11:48:06,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2024-02-20 11:48:06,554 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:48:06,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1041 places, 1411 transitions, 220712 flow. Second operand has 35 states, 35 states have (on average 4.742857142857143) internal successors, (166), 35 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:48:06,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:48:06,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:48:06,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:48:12,122 INFO L124 PetriNetUnfolderBase]: 1676/3244 cut-off events. [2024-02-20 11:48:12,122 INFO L125 PetriNetUnfolderBase]: For 478/478 co-relation queries the response was YES. [2024-02-20 11:48:12,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254885 conditions, 3244 events. 1676/3244 cut-off events. For 478/478 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 22302 event pairs, 8 based on Foata normal form. 3/2421 useless extension candidates. Maximal degree in co-relation 180533. Up to 3219 conditions per place. [2024-02-20 11:48:12,231 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 981 selfloop transitions, 128 changer transitions 337/1447 dead transitions. [2024-02-20 11:48:12,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1072 places, 1447 transitions, 229244 flow [2024-02-20 11:48:12,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-02-20 11:48:12,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-02-20 11:48:12,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 236 transitions. [2024-02-20 11:48:12,232 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.32065217391304346 [2024-02-20 11:48:12,232 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1049 predicate places. [2024-02-20 11:48:12,232 INFO L507 AbstractCegarLoop]: Abstraction has has 1072 places, 1447 transitions, 229244 flow [2024-02-20 11:48:12,233 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.742857142857143) internal successors, (166), 35 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:48:12,233 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:48:12,233 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:48:12,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2024-02-20 11:48:12,445 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:48:12,445 INFO L432 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:48:12,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:48:12,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1531350804, now seen corresponding path program 70 times [2024-02-20 11:48:12,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:48:12,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506953722] [2024-02-20 11:48:12,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:48:12,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:48:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:48:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:48:12,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:48:12,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506953722] [2024-02-20 11:48:12,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506953722] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:48:12,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480571467] [2024-02-20 11:48:12,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:48:12,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:48:12,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:48:12,952 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:48:12,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-02-20 11:48:13,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:48:13,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:48:13,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-20 11:48:13,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:48:13,359 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:48:13,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-02-20 11:48:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:48:13,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:48:13,665 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-02-20 11:48:13,665 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 173 treesize of output 107 [2024-02-20 11:48:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:48:13,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480571467] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:48:13,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:48:13,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-02-20 11:48:13,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356617363] [2024-02-20 11:48:13,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:48:13,744 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-02-20 11:48:13,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:48:13,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-02-20 11:48:13,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2024-02-20 11:48:13,745 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:48:13,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1072 places, 1447 transitions, 229244 flow. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:48:13,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:48:13,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:48:13,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:48:18,934 INFO L124 PetriNetUnfolderBase]: 1681/3263 cut-off events. [2024-02-20 11:48:18,935 INFO L125 PetriNetUnfolderBase]: For 491/491 co-relation queries the response was YES. [2024-02-20 11:48:18,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259632 conditions, 3263 events. 1681/3263 cut-off events. For 491/491 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 22555 event pairs, 4 based on Foata normal form. 2/2435 useless extension candidates. Maximal degree in co-relation 183378. Up to 3238 conditions per place. [2024-02-20 11:48:19,064 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 999 selfloop transitions, 115 changer transitions 345/1460 dead transitions. [2024-02-20 11:48:19,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1094 places, 1460 transitions, 234231 flow [2024-02-20 11:48:19,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-20 11:48:19,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-20 11:48:19,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 198 transitions. [2024-02-20 11:48:19,066 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3742911153119093 [2024-02-20 11:48:19,066 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1071 predicate places. [2024-02-20 11:48:19,066 INFO L507 AbstractCegarLoop]: Abstraction has has 1094 places, 1460 transitions, 234231 flow [2024-02-20 11:48:19,066 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:48:19,066 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:48:19,067 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:48:19,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2024-02-20 11:48:19,279 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:48:19,279 INFO L432 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:48:19,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:48:19,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1602551465, now seen corresponding path program 71 times [2024-02-20 11:48:19,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:48:19,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876387424] [2024-02-20 11:48:19,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:48:19,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:48:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:48:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:48:19,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:48:19,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876387424] [2024-02-20 11:48:19,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876387424] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:48:19,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117161442] [2024-02-20 11:48:19,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:48:19,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:48:19,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:48:19,954 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:48:19,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-02-20 11:48:20,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 11:48:20,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:48:20,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 28 conjunts are in the unsatisfiable core [2024-02-20 11:48:20,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:48:20,415 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:48:20,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-02-20 11:48:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:48:20,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:48:20,578 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:48:20,579 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 71 treesize of output 88 [2024-02-20 11:48:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-02-20 11:48:20,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117161442] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:48:20,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:48:20,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 23 [2024-02-20 11:48:20,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432426391] [2024-02-20 11:48:20,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:48:20,636 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-20 11:48:20,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:48:20,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-20 11:48:20,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2024-02-20 11:48:20,637 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:48:20,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1094 places, 1460 transitions, 234231 flow. Second operand has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 23 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:48:20,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:48:20,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:48:20,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:48:25,522 INFO L124 PetriNetUnfolderBase]: 1665/3231 cut-off events. [2024-02-20 11:48:25,522 INFO L125 PetriNetUnfolderBase]: For 491/491 co-relation queries the response was YES. [2024-02-20 11:48:25,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260357 conditions, 3231 events. 1665/3231 cut-off events. For 491/491 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22281 event pairs, 10 based on Foata normal form. 0/2417 useless extension candidates. Maximal degree in co-relation 184050. Up to 3207 conditions per place. [2024-02-20 11:48:25,635 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 1066 selfloop transitions, 37 changer transitions 339/1443 dead transitions. [2024-02-20 11:48:25,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1102 places, 1443 transitions, 234383 flow [2024-02-20 11:48:25,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-20 11:48:25,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-20 11:48:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 76 transitions. [2024-02-20 11:48:25,636 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3671497584541063 [2024-02-20 11:48:25,636 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1079 predicate places. [2024-02-20 11:48:25,636 INFO L507 AbstractCegarLoop]: Abstraction has has 1102 places, 1443 transitions, 234383 flow [2024-02-20 11:48:25,636 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 23 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:48:25,637 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:48:25,637 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:48:25,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2024-02-20 11:48:25,843 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2024-02-20 11:48:25,843 INFO L432 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:48:25,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:48:25,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1013010950, now seen corresponding path program 72 times [2024-02-20 11:48:25,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:48:25,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677384603] [2024-02-20 11:48:25,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:48:25,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:48:25,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:48:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:48:26,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:48:26,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677384603] [2024-02-20 11:48:26,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677384603] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:48:26,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141692492] [2024-02-20 11:48:26,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:48:26,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:48:26,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:48:26,429 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:48:26,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-02-20 11:48:26,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 11:48:26,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:48:26,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-20 11:48:26,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:48:26,878 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:48:26,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-02-20 11:48:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:48:26,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:48:27,243 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-02-20 11:48:27,243 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 181 treesize of output 113 [2024-02-20 11:48:27,339 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:48:27,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141692492] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:48:27,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:48:27,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 24 [2024-02-20 11:48:27,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080155586] [2024-02-20 11:48:27,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:48:27,340 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-20 11:48:27,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:48:27,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-20 11:48:27,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-02-20 11:48:27,341 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:48:27,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1102 places, 1443 transitions, 234383 flow. Second operand has 24 states, 24 states have (on average 5.041666666666667) internal successors, (121), 24 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:48:27,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:48:27,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:48:27,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:48:32,764 INFO L124 PetriNetUnfolderBase]: 1671/3258 cut-off events. [2024-02-20 11:48:32,764 INFO L125 PetriNetUnfolderBase]: For 491/491 co-relation queries the response was YES. [2024-02-20 11:48:32,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265787 conditions, 3258 events. 1671/3258 cut-off events. For 491/491 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 22582 event pairs, 8 based on Foata normal form. 2/2440 useless extension candidates. Maximal degree in co-relation 187798. Up to 3234 conditions per place. [2024-02-20 11:48:32,870 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1041 selfloop transitions, 67 changer transitions 354/1463 dead transitions. [2024-02-20 11:48:32,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1121 places, 1463 transitions, 240565 flow [2024-02-20 11:48:32,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-20 11:48:32,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-20 11:48:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 155 transitions. [2024-02-20 11:48:32,871 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.33695652173913043 [2024-02-20 11:48:32,871 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1098 predicate places. [2024-02-20 11:48:32,871 INFO L507 AbstractCegarLoop]: Abstraction has has 1121 places, 1463 transitions, 240565 flow [2024-02-20 11:48:32,871 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.041666666666667) internal successors, (121), 24 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:48:32,872 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:48:32,872 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:48:32,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2024-02-20 11:48:33,084 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:48:33,084 INFO L432 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:48:33,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:48:33,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1004222687, now seen corresponding path program 73 times [2024-02-20 11:48:33,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:48:33,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778303564] [2024-02-20 11:48:33,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:48:33,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:48:33,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:48:34,059 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:48:34,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:48:34,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778303564] [2024-02-20 11:48:34,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778303564] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:48:34,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088804227] [2024-02-20 11:48:34,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:48:34,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:48:34,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:48:34,061 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:48:34,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2024-02-20 11:48:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:48:34,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 11:48:34,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:48:34,516 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-02-20 11:48:34,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 9 [2024-02-20 11:48:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:48:34,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:48:34,630 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-02-20 11:48:34,630 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 36 treesize of output 52 [2024-02-20 11:48:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:48:34,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088804227] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:48:34,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:48:34,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 32 [2024-02-20 11:48:34,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817706119] [2024-02-20 11:48:34,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:48:34,640 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-02-20 11:48:34,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:48:34,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-02-20 11:48:34,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2024-02-20 11:48:34,641 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:48:34,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1121 places, 1463 transitions, 240565 flow. Second operand has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:48:34,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:48:34,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:48:34,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:48:40,202 INFO L124 PetriNetUnfolderBase]: 1711/3328 cut-off events. [2024-02-20 11:48:40,202 INFO L125 PetriNetUnfolderBase]: For 494/494 co-relation queries the response was YES. [2024-02-20 11:48:40,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274839 conditions, 3328 events. 1711/3328 cut-off events. For 494/494 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 23119 event pairs, 0 based on Foata normal form. 0/2498 useless extension candidates. Maximal degree in co-relation 194238. Up to 3304 conditions per place. [2024-02-20 11:48:40,318 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 988 selfloop transitions, 150 changer transitions 354/1493 dead transitions. [2024-02-20 11:48:40,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1140 places, 1493 transitions, 248484 flow [2024-02-20 11:48:40,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-20 11:48:40,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-20 11:48:40,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 156 transitions. [2024-02-20 11:48:40,320 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3391304347826087 [2024-02-20 11:48:40,320 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1117 predicate places. [2024-02-20 11:48:40,320 INFO L507 AbstractCegarLoop]: Abstraction has has 1140 places, 1493 transitions, 248484 flow [2024-02-20 11:48:40,320 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:48:40,320 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:48:40,320 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:48:40,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2024-02-20 11:48:40,532 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:48:40,532 INFO L432 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:48:40,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:48:40,533 INFO L85 PathProgramCache]: Analyzing trace with hash 575765546, now seen corresponding path program 74 times [2024-02-20 11:48:40,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:48:40,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481841140] [2024-02-20 11:48:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:48:40,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:48:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:48:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:48:41,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:48:41,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481841140] [2024-02-20 11:48:41,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481841140] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:48:41,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469935450] [2024-02-20 11:48:41,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:48:41,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:48:41,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:48:41,132 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:48:41,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2024-02-20 11:48:41,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:48:41,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:48:41,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 39 conjunts are in the unsatisfiable core [2024-02-20 11:48:41,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:48:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-20 11:48:41,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:48:41,740 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-02-20 11:48:41,740 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 67 treesize of output 71 [2024-02-20 11:48:41,778 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:48:41,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469935450] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:48:41,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:48:41,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 22 [2024-02-20 11:48:41,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712863250] [2024-02-20 11:48:41,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:48:41,779 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-20 11:48:41,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:48:41,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-20 11:48:41,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-02-20 11:48:41,780 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:48:41,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1140 places, 1493 transitions, 248484 flow. Second operand has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:48:41,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:48:41,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:48:41,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:48:47,525 INFO L124 PetriNetUnfolderBase]: 1719/3353 cut-off events. [2024-02-20 11:48:47,526 INFO L125 PetriNetUnfolderBase]: For 513/513 co-relation queries the response was YES. [2024-02-20 11:48:47,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280251 conditions, 3353 events. 1719/3353 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23468 event pairs, 10 based on Foata normal form. 0/2523 useless extension candidates. Maximal degree in co-relation 197418. Up to 3329 conditions per place. [2024-02-20 11:48:47,631 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 960 selfloop transitions, 171 changer transitions 374/1506 dead transitions. [2024-02-20 11:48:47,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1151 places, 1506 transitions, 253664 flow [2024-02-20 11:48:47,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-20 11:48:47,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-20 11:48:47,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 110 transitions. [2024-02-20 11:48:47,632 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.39855072463768115 [2024-02-20 11:48:47,633 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1128 predicate places. [2024-02-20 11:48:47,633 INFO L507 AbstractCegarLoop]: Abstraction has has 1151 places, 1506 transitions, 253664 flow [2024-02-20 11:48:47,633 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:48:47,633 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:48:47,633 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:48:47,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2024-02-20 11:48:47,845 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:48:47,846 INFO L432 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:48:47,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:48:47,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1702176350, now seen corresponding path program 75 times [2024-02-20 11:48:47,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:48:47,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622282269] [2024-02-20 11:48:47,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:48:47,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:48:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:48:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:48:49,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:48:49,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622282269] [2024-02-20 11:48:49,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622282269] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:48:49,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594971309] [2024-02-20 11:48:49,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:48:49,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:48:49,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:48:49,110 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:48:49,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2024-02-20 11:48:49,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 11:48:49,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:48:49,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-20 11:48:49,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:48:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:48:49,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:48:49,862 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-02-20 11:48:49,862 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 67 treesize of output 71 [2024-02-20 11:48:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:48:49,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594971309] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:48:49,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:48:49,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 9] total 35 [2024-02-20 11:48:49,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949283816] [2024-02-20 11:48:49,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:48:49,906 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-02-20 11:48:49,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:48:49,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-02-20 11:48:49,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2024-02-20 11:48:49,907 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:48:49,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1151 places, 1506 transitions, 253664 flow. Second operand has 35 states, 35 states have (on average 4.742857142857143) internal successors, (166), 35 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:48:49,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:48:49,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:48:49,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:48:55,530 INFO L124 PetriNetUnfolderBase]: 1724/3371 cut-off events. [2024-02-20 11:48:55,530 INFO L125 PetriNetUnfolderBase]: For 519/519 co-relation queries the response was YES. [2024-02-20 11:48:55,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285117 conditions, 3371 events. 1724/3371 cut-off events. For 519/519 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23722 event pairs, 8 based on Foata normal form. 0/2541 useless extension candidates. Maximal degree in co-relation 200363. Up to 3347 conditions per place. [2024-02-20 11:48:55,766 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 982 selfloop transitions, 144 changer transitions 388/1515 dead transitions. [2024-02-20 11:48:55,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1166 places, 1515 transitions, 258213 flow [2024-02-20 11:48:55,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-20 11:48:55,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-20 11:48:55,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 130 transitions. [2024-02-20 11:48:55,768 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3532608695652174 [2024-02-20 11:48:55,769 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1143 predicate places. [2024-02-20 11:48:55,769 INFO L507 AbstractCegarLoop]: Abstraction has has 1166 places, 1515 transitions, 258213 flow [2024-02-20 11:48:55,769 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.742857142857143) internal successors, (166), 35 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:48:55,769 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:48:55,769 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:48:55,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2024-02-20 11:48:55,981 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2024-02-20 11:48:55,982 INFO L432 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:48:55,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:48:55,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1426794207, now seen corresponding path program 76 times [2024-02-20 11:48:55,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:48:55,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117288375] [2024-02-20 11:48:55,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:48:55,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:48:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:48:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:48:56,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:48:56,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117288375] [2024-02-20 11:48:56,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117288375] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:48:56,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651150007] [2024-02-20 11:48:56,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:48:56,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:48:56,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:48:56,550 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:48:56,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2024-02-20 11:48:56,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:48:56,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:48:56,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 11:48:56,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:48:57,076 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:48:57,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-02-20 11:48:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:48:57,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:48:57,331 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-02-20 11:48:57,331 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 36 treesize of output 52 [2024-02-20 11:48:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:48:57,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651150007] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:48:57,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:48:57,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2024-02-20 11:48:57,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538245184] [2024-02-20 11:48:57,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:48:57,341 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-20 11:48:57,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:48:57,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-20 11:48:57,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-02-20 11:48:57,342 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:48:57,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1166 places, 1515 transitions, 258213 flow. Second operand has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:48:57,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:48:57,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:48:57,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:49:03,271 INFO L124 PetriNetUnfolderBase]: 1736/3398 cut-off events. [2024-02-20 11:49:03,271 INFO L125 PetriNetUnfolderBase]: For 528/528 co-relation queries the response was YES. [2024-02-20 11:49:03,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290707 conditions, 3398 events. 1736/3398 cut-off events. For 528/528 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 23968 event pairs, 4 based on Foata normal form. 0/2562 useless extension candidates. Maximal degree in co-relation 204096. Up to 3373 conditions per place. [2024-02-20 11:49:03,377 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 992 selfloop transitions, 146 changer transitions 400/1539 dead transitions. [2024-02-20 11:49:03,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1184 places, 1539 transitions, 265387 flow [2024-02-20 11:49:03,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-20 11:49:03,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-20 11:49:03,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 176 transitions. [2024-02-20 11:49:03,378 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.40274599542334094 [2024-02-20 11:49:03,380 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1161 predicate places. [2024-02-20 11:49:03,380 INFO L507 AbstractCegarLoop]: Abstraction has has 1184 places, 1539 transitions, 265387 flow [2024-02-20 11:49:03,380 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:49:03,380 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:49:03,380 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:49:03,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2024-02-20 11:49:03,591 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:49:03,592 INFO L432 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:49:03,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:49:03,593 INFO L85 PathProgramCache]: Analyzing trace with hash 469485535, now seen corresponding path program 77 times [2024-02-20 11:49:03,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:49:03,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303638064] [2024-02-20 11:49:03,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:49:03,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:49:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:49:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:49:04,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:49:04,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303638064] [2024-02-20 11:49:04,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303638064] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:49:04,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120334458] [2024-02-20 11:49:04,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:49:04,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:49:04,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:49:04,586 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:49:04,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2024-02-20 11:49:05,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 11:49:05,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:49:05,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 35 conjunts are in the unsatisfiable core [2024-02-20 11:49:05,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:49:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:49:05,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:49:05,383 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-02-20 11:49:05,383 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 36 treesize of output 52 [2024-02-20 11:49:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:49:05,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120334458] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:49:05,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:49:05,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 9] total 34 [2024-02-20 11:49:05,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293179502] [2024-02-20 11:49:05,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:49:05,414 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-02-20 11:49:05,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:49:05,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-02-20 11:49:05,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2024-02-20 11:49:05,429 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:49:05,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1184 places, 1539 transitions, 265387 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:49:05,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:49:05,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:49:05,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:49:11,949 INFO L124 PetriNetUnfolderBase]: 1755/3433 cut-off events. [2024-02-20 11:49:11,950 INFO L125 PetriNetUnfolderBase]: For 541/541 co-relation queries the response was YES. [2024-02-20 11:49:11,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297131 conditions, 3433 events. 1755/3433 cut-off events. For 541/541 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24214 event pairs, 10 based on Foata normal form. 0/2593 useless extension candidates. Maximal degree in co-relation 208470. Up to 3408 conditions per place. [2024-02-20 11:49:12,144 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 988 selfloop transitions, 162 changer transitions 404/1555 dead transitions. [2024-02-20 11:49:12,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1210 places, 1555 transitions, 271256 flow [2024-02-20 11:49:12,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-02-20 11:49:12,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-02-20 11:49:12,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 211 transitions. [2024-02-20 11:49:12,146 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3397745571658615 [2024-02-20 11:49:12,147 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1187 predicate places. [2024-02-20 11:49:12,147 INFO L507 AbstractCegarLoop]: Abstraction has has 1210 places, 1555 transitions, 271256 flow [2024-02-20 11:49:12,147 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:49:12,147 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:49:12,147 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:49:12,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2024-02-20 11:49:12,352 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:49:12,353 INFO L432 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:49:12,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:49:12,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1577398357, now seen corresponding path program 78 times [2024-02-20 11:49:12,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:49:12,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787744993] [2024-02-20 11:49:12,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:49:12,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:49:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:49:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-02-20 11:49:13,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:49:13,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787744993] [2024-02-20 11:49:13,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787744993] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:49:13,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663419337] [2024-02-20 11:49:13,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:49:13,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:49:13,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:49:13,152 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:49:13,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2024-02-20 11:49:13,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 11:49:13,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:49:13,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 41 conjunts are in the unsatisfiable core [2024-02-20 11:49:13,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:49:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:49:13,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:49:14,125 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-02-20 11:49:14,126 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 36 treesize of output 52 [2024-02-20 11:49:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:49:14,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663419337] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:49:14,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:49:14,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 32 [2024-02-20 11:49:14,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256451754] [2024-02-20 11:49:14,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:49:14,163 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-02-20 11:49:14,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:49:14,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-02-20 11:49:14,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2024-02-20 11:49:14,163 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:49:14,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1210 places, 1555 transitions, 271256 flow. Second operand has 32 states, 32 states have (on average 4.8125) internal successors, (154), 32 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:49:14,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:49:14,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:49:14,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:49:20,872 INFO L124 PetriNetUnfolderBase]: 1846/3639 cut-off events. [2024-02-20 11:49:20,872 INFO L125 PetriNetUnfolderBase]: For 578/578 co-relation queries the response was YES. [2024-02-20 11:49:20,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318264 conditions, 3639 events. 1846/3639 cut-off events. For 578/578 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 26204 event pairs, 6 based on Foata normal form. 0/2761 useless extension candidates. Maximal degree in co-relation 219754. Up to 3609 conditions per place. [2024-02-20 11:49:21,017 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 994 selfloop transitions, 237 changer transitions 418/1650 dead transitions. [2024-02-20 11:49:21,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1235 places, 1650 transitions, 291156 flow [2024-02-20 11:49:21,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-20 11:49:21,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-20 11:49:21,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 211 transitions. [2024-02-20 11:49:21,018 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3528428093645485 [2024-02-20 11:49:21,019 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1212 predicate places. [2024-02-20 11:49:21,019 INFO L507 AbstractCegarLoop]: Abstraction has has 1235 places, 1650 transitions, 291156 flow [2024-02-20 11:49:21,019 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.8125) internal successors, (154), 32 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:49:21,019 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:49:21,019 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:49:21,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2024-02-20 11:49:21,231 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2024-02-20 11:49:21,231 INFO L432 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:49:21,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:49:21,232 INFO L85 PathProgramCache]: Analyzing trace with hash -157222613, now seen corresponding path program 79 times [2024-02-20 11:49:21,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:49:21,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425272569] [2024-02-20 11:49:21,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:49:21,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:49:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:49:22,099 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-20 11:49:22,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:49:22,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425272569] [2024-02-20 11:49:22,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425272569] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:49:22,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436958161] [2024-02-20 11:49:22,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:49:22,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:49:22,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:49:22,100 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:49:22,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2024-02-20 11:49:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:49:22,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 11:49:22,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:49:22,587 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:49:22,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-02-20 11:49:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:49:22,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:49:22,762 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-02-20 11:49:22,762 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 36 treesize of output 52 [2024-02-20 11:49:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:49:22,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436958161] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:49:22,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:49:22,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 28 [2024-02-20 11:49:22,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780463573] [2024-02-20 11:49:22,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:49:22,771 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-02-20 11:49:22,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:49:22,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-02-20 11:49:22,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2024-02-20 11:49:22,772 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:49:22,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1235 places, 1650 transitions, 291156 flow. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:49:22,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:49:22,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:49:22,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:49:30,627 INFO L124 PetriNetUnfolderBase]: 1896/3722 cut-off events. [2024-02-20 11:49:30,628 INFO L125 PetriNetUnfolderBase]: For 587/587 co-relation queries the response was YES. [2024-02-20 11:49:30,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329356 conditions, 3722 events. 1896/3722 cut-off events. For 587/587 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 26880 event pairs, 4 based on Foata normal form. 0/2836 useless extension candidates. Maximal degree in co-relation 227769. Up to 3693 conditions per place. [2024-02-20 11:49:30,772 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1083 selfloop transitions, 183 changer transitions 418/1685 dead transitions. [2024-02-20 11:49:30,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1263 places, 1685 transitions, 300699 flow [2024-02-20 11:49:30,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-02-20 11:49:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-02-20 11:49:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 236 transitions. [2024-02-20 11:49:30,773 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.34202898550724636 [2024-02-20 11:49:30,773 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1240 predicate places. [2024-02-20 11:49:30,774 INFO L507 AbstractCegarLoop]: Abstraction has has 1263 places, 1685 transitions, 300699 flow [2024-02-20 11:49:30,774 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:49:30,774 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:49:30,774 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:49:30,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2024-02-20 11:49:30,986 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:49:30,987 INFO L432 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:49:30,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:49:30,987 INFO L85 PathProgramCache]: Analyzing trace with hash 2128028424, now seen corresponding path program 80 times [2024-02-20 11:49:30,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:49:30,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236098429] [2024-02-20 11:49:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:49:30,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:49:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:49:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:49:32,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:49:32,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236098429] [2024-02-20 11:49:32,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236098429] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:49:32,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086203013] [2024-02-20 11:49:32,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:49:32,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:49:32,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:49:32,222 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:49:32,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2024-02-20 11:49:32,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:49:32,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:49:32,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 41 conjunts are in the unsatisfiable core [2024-02-20 11:49:32,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:49:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-20 11:49:32,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:49:33,012 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-02-20 11:49:33,013 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 67 treesize of output 71 [2024-02-20 11:49:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:49:33,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086203013] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:49:33,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:49:33,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 9] total 38 [2024-02-20 11:49:33,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465956378] [2024-02-20 11:49:33,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:49:33,048 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-02-20 11:49:33,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:49:33,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-02-20 11:49:33,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2024-02-20 11:49:33,049 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:49:33,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1263 places, 1685 transitions, 300699 flow. Second operand has 38 states, 38 states have (on average 4.684210526315789) internal successors, (178), 38 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:49:33,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:49:33,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:49:33,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:49:40,956 INFO L124 PetriNetUnfolderBase]: 1892/3718 cut-off events. [2024-02-20 11:49:40,956 INFO L125 PetriNetUnfolderBase]: For 585/585 co-relation queries the response was YES. [2024-02-20 11:49:40,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332692 conditions, 3718 events. 1892/3718 cut-off events. For 585/585 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 26832 event pairs, 4 based on Foata normal form. 0/2836 useless extension candidates. Maximal degree in co-relation 230148. Up to 3689 conditions per place. [2024-02-20 11:49:41,097 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 1110 selfloop transitions, 147 changer transitions 426/1684 dead transitions. [2024-02-20 11:49:41,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1284 places, 1684 transitions, 303887 flow [2024-02-20 11:49:41,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-20 11:49:41,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-20 11:49:41,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 159 transitions. [2024-02-20 11:49:41,098 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3142292490118577 [2024-02-20 11:49:41,099 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1261 predicate places. [2024-02-20 11:49:41,099 INFO L507 AbstractCegarLoop]: Abstraction has has 1284 places, 1684 transitions, 303887 flow [2024-02-20 11:49:41,099 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.684210526315789) internal successors, (178), 38 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:49:41,099 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:49:41,099 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:49:41,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2024-02-20 11:49:41,311 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:49:41,312 INFO L432 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:49:41,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:49:41,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1060968700, now seen corresponding path program 81 times [2024-02-20 11:49:41,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:49:41,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842488502] [2024-02-20 11:49:41,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:49:41,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:49:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:49:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:49:41,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:49:41,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842488502] [2024-02-20 11:49:41,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842488502] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:49:41,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106929367] [2024-02-20 11:49:41,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:49:41,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:49:41,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:49:41,998 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:49:41,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2024-02-20 11:49:42,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-20 11:49:42,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:49:42,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 35 conjunts are in the unsatisfiable core [2024-02-20 11:49:42,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:49:42,467 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:49:42,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-02-20 11:49:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:49:42,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:49:42,628 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-02-20 11:49:42,629 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 67 treesize of output 71 [2024-02-20 11:49:42,669 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:49:42,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106929367] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:49:42,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:49:42,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2024-02-20 11:49:42,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619421297] [2024-02-20 11:49:42,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:49:42,673 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-20 11:49:42,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:49:42,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-20 11:49:42,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-02-20 11:49:42,675 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:49:42,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1284 places, 1684 transitions, 303887 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:49:42,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:49:42,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:49:42,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:49:50,365 INFO L124 PetriNetUnfolderBase]: 1904/3745 cut-off events. [2024-02-20 11:49:50,365 INFO L125 PetriNetUnfolderBase]: For 580/580 co-relation queries the response was YES. [2024-02-20 11:49:50,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338754 conditions, 3745 events. 1904/3745 cut-off events. For 580/580 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 27104 event pairs, 4 based on Foata normal form. 0/2857 useless extension candidates. Maximal degree in co-relation 234161. Up to 3715 conditions per place. [2024-02-20 11:49:50,588 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 1137 selfloop transitions, 131 changer transitions 426/1695 dead transitions. [2024-02-20 11:49:50,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1294 places, 1695 transitions, 309261 flow [2024-02-20 11:49:50,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-20 11:49:50,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-20 11:49:50,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-02-20 11:49:50,590 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4505928853754941 [2024-02-20 11:49:50,590 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1271 predicate places. [2024-02-20 11:49:50,590 INFO L507 AbstractCegarLoop]: Abstraction has has 1294 places, 1695 transitions, 309261 flow [2024-02-20 11:49:50,590 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:49:50,590 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:49:50,590 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:49:50,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2024-02-20 11:49:50,803 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2024-02-20 11:49:50,803 INFO L432 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:49:50,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:49:50,803 INFO L85 PathProgramCache]: Analyzing trace with hash -657910558, now seen corresponding path program 82 times [2024-02-20 11:49:50,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:49:50,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003690721] [2024-02-20 11:49:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:49:50,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:49:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:49:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:49:51,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:49:51,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003690721] [2024-02-20 11:49:51,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003690721] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:49:51,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402009510] [2024-02-20 11:49:51,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:49:51,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:49:51,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:49:51,922 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:49:51,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2024-02-20 11:49:52,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:49:52,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:49:52,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 11:49:52,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:49:52,459 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:49:52,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-02-20 11:49:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:49:52,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:49:52,667 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-02-20 11:49:52,667 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 67 treesize of output 71 [2024-02-20 11:49:52,684 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:49:52,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402009510] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:49:52,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:49:52,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 34 [2024-02-20 11:49:52,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251517215] [2024-02-20 11:49:52,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:49:52,685 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-02-20 11:49:52,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:49:52,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-02-20 11:49:52,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=979, Unknown=0, NotChecked=0, Total=1122 [2024-02-20 11:49:52,686 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:49:52,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1294 places, 1695 transitions, 309261 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:49:52,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:49:52,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:49:52,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:50:00,077 INFO L124 PetriNetUnfolderBase]: 1894/3724 cut-off events. [2024-02-20 11:50:00,077 INFO L125 PetriNetUnfolderBase]: For 583/583 co-relation queries the response was YES. [2024-02-20 11:50:00,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340628 conditions, 3724 events. 1894/3724 cut-off events. For 583/583 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 26963 event pairs, 4 based on Foata normal form. 0/2844 useless extension candidates. Maximal degree in co-relation 235998. Up to 3695 conditions per place. [2024-02-20 11:50:00,214 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 1109 selfloop transitions, 147 changer transitions 430/1687 dead transitions. [2024-02-20 11:50:00,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1310 places, 1687 transitions, 311171 flow [2024-02-20 11:50:00,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-20 11:50:00,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-20 11:50:00,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 143 transitions. [2024-02-20 11:50:00,215 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3657289002557545 [2024-02-20 11:50:00,215 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1287 predicate places. [2024-02-20 11:50:00,215 INFO L507 AbstractCegarLoop]: Abstraction has has 1310 places, 1687 transitions, 311171 flow [2024-02-20 11:50:00,215 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:50:00,215 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:50:00,215 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:50:00,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2024-02-20 11:50:00,427 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:50:00,427 INFO L432 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:50:00,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:50:00,428 INFO L85 PathProgramCache]: Analyzing trace with hash -300752925, now seen corresponding path program 83 times [2024-02-20 11:50:00,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:50:00,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057450751] [2024-02-20 11:50:00,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:50:00,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:50:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:50:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:50:01,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:50:01,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057450751] [2024-02-20 11:50:01,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057450751] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:50:01,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405317670] [2024-02-20 11:50:01,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:50:01,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:50:01,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:50:01,592 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:50:01,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2024-02-20 11:50:02,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 11:50:02,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:50:02,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 31 conjunts are in the unsatisfiable core [2024-02-20 11:50:02,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:50:02,224 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:50:02,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:50:02,316 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:50:02,317 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 71 treesize of output 88 [2024-02-20 11:50:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:50:02,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405317670] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:50:02,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:50:02,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 9] total 38 [2024-02-20 11:50:02,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051004040] [2024-02-20 11:50:02,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:50:02,411 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-02-20 11:50:02,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:50:02,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-02-20 11:50:02,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2024-02-20 11:50:02,412 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:50:02,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1310 places, 1687 transitions, 311171 flow. Second operand has 38 states, 38 states have (on average 4.684210526315789) internal successors, (178), 38 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:50:02,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:50:02,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:50:02,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:50:11,027 INFO L124 PetriNetUnfolderBase]: 1896/3737 cut-off events. [2024-02-20 11:50:11,027 INFO L125 PetriNetUnfolderBase]: For 596/596 co-relation queries the response was YES. [2024-02-20 11:50:11,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345446 conditions, 3737 events. 1896/3737 cut-off events. For 596/596 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 27084 event pairs, 10 based on Foata normal form. 0/2857 useless extension candidates. Maximal degree in co-relation 238749. Up to 3707 conditions per place. [2024-02-20 11:50:11,153 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1145 selfloop transitions, 124 changer transitions 447/1717 dead transitions. [2024-02-20 11:50:11,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1348 places, 1717 transitions, 320141 flow [2024-02-20 11:50:11,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-02-20 11:50:11,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-02-20 11:50:11,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 279 transitions. [2024-02-20 11:50:11,154 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3110367892976589 [2024-02-20 11:50:11,155 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1325 predicate places. [2024-02-20 11:50:11,155 INFO L507 AbstractCegarLoop]: Abstraction has has 1348 places, 1717 transitions, 320141 flow [2024-02-20 11:50:11,155 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.684210526315789) internal successors, (178), 38 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:50:11,155 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:50:11,155 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:50:11,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2024-02-20 11:50:11,367 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:50:11,368 INFO L432 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:50:11,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:50:11,368 INFO L85 PathProgramCache]: Analyzing trace with hash -2020297497, now seen corresponding path program 84 times [2024-02-20 11:50:11,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:50:11,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411064379] [2024-02-20 11:50:11,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:50:11,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:50:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:50:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:50:12,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:50:12,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411064379] [2024-02-20 11:50:12,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411064379] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:50:12,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569179101] [2024-02-20 11:50:12,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:50:12,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:50:12,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:50:12,369 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:50:12,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2024-02-20 11:50:12,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 11:50:12,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:50:12,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-20 11:50:12,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:50:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:50:13,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:50:13,135 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-20 11:50:13,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-02-20 11:50:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:50:13,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569179101] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:50:13,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:50:13,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 9] total 33 [2024-02-20 11:50:13,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047358841] [2024-02-20 11:50:13,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:50:13,182 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-02-20 11:50:13,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:50:13,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-02-20 11:50:13,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2024-02-20 11:50:13,183 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:50:13,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1348 places, 1717 transitions, 320141 flow. Second operand has 33 states, 33 states have (on average 4.818181818181818) internal successors, (159), 33 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:50:13,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:50:13,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:50:13,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:50:21,336 INFO L124 PetriNetUnfolderBase]: 1912/3765 cut-off events. [2024-02-20 11:50:21,336 INFO L125 PetriNetUnfolderBase]: For 590/590 co-relation queries the response was YES. [2024-02-20 11:50:21,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351790 conditions, 3765 events. 1912/3765 cut-off events. For 590/590 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 27351 event pairs, 0 based on Foata normal form. 0/2881 useless extension candidates. Maximal degree in co-relation 243196. Up to 3735 conditions per place. [2024-02-20 11:50:21,470 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1187 selfloop transitions, 94 changer transitions 447/1729 dead transitions. [2024-02-20 11:50:21,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1366 places, 1729 transitions, 325835 flow [2024-02-20 11:50:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-20 11:50:21,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-20 11:50:21,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 156 transitions. [2024-02-20 11:50:21,472 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.35697940503432496 [2024-02-20 11:50:21,472 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1343 predicate places. [2024-02-20 11:50:21,472 INFO L507 AbstractCegarLoop]: Abstraction has has 1366 places, 1729 transitions, 325835 flow [2024-02-20 11:50:21,472 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.818181818181818) internal successors, (159), 33 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:50:21,472 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:50:21,472 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:50:21,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2024-02-20 11:50:21,684 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:50:21,685 INFO L432 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:50:21,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:50:21,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1685129284, now seen corresponding path program 85 times [2024-02-20 11:50:21,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:50:21,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644154137] [2024-02-20 11:50:21,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:50:21,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:50:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:50:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:50:22,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:50:22,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644154137] [2024-02-20 11:50:22,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644154137] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:50:22,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030147892] [2024-02-20 11:50:22,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:50:22,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:50:22,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:50:22,321 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:50:22,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2024-02-20 11:50:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:50:22,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 11:50:22,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:50:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:50:22,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:50:22,958 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-20 11:50:22,959 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 73 treesize of output 94 [2024-02-20 11:50:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:50:22,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030147892] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:50:22,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:50:23,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2024-02-20 11:50:23,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684655621] [2024-02-20 11:50:23,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:50:23,000 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-20 11:50:23,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:50:23,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-20 11:50:23,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2024-02-20 11:50:23,001 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:50:23,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1366 places, 1729 transitions, 325835 flow. Second operand has 24 states, 24 states have (on average 5.041666666666667) internal successors, (121), 24 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:50:23,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:50:23,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:50:23,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:50:31,199 INFO L124 PetriNetUnfolderBase]: 1914/3776 cut-off events. [2024-02-20 11:50:31,200 INFO L125 PetriNetUnfolderBase]: For 607/607 co-relation queries the response was YES. [2024-02-20 11:50:31,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356576 conditions, 3776 events. 1914/3776 cut-off events. For 607/607 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 27525 event pairs, 8 based on Foata normal form. 0/2892 useless extension candidates. Maximal degree in co-relation 246163. Up to 3746 conditions per place. [2024-02-20 11:50:31,352 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 1200 selfloop transitions, 76 changer transitions 457/1734 dead transitions. [2024-02-20 11:50:31,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1376 places, 1734 transitions, 330247 flow [2024-02-20 11:50:31,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-20 11:50:31,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-20 11:50:31,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 101 transitions. [2024-02-20 11:50:31,353 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.39920948616600793 [2024-02-20 11:50:31,353 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1353 predicate places. [2024-02-20 11:50:31,353 INFO L507 AbstractCegarLoop]: Abstraction has has 1376 places, 1734 transitions, 330247 flow [2024-02-20 11:50:31,353 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.041666666666667) internal successors, (121), 24 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:50:31,354 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:50:31,354 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:50:31,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2024-02-20 11:50:31,565 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2024-02-20 11:50:31,565 INFO L432 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:50:31,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:50:31,566 INFO L85 PathProgramCache]: Analyzing trace with hash -111991714, now seen corresponding path program 86 times [2024-02-20 11:50:31,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:50:31,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193504824] [2024-02-20 11:50:31,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:50:31,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:50:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:50:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-20 11:50:32,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:50:32,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193504824] [2024-02-20 11:50:32,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193504824] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:50:32,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094065358] [2024-02-20 11:50:32,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:50:32,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:50:32,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:50:32,316 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:50:32,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2024-02-20 11:50:32,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:50:32,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:50:32,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 41 conjunts are in the unsatisfiable core [2024-02-20 11:50:32,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:50:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-20 11:50:32,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:50:32,948 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:50:32,948 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 44 treesize of output 77 [2024-02-20 11:50:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:50:33,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094065358] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:50:33,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:50:33,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 28 [2024-02-20 11:50:33,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547494165] [2024-02-20 11:50:33,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:50:33,016 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-02-20 11:50:33,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:50:33,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-02-20 11:50:33,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2024-02-20 11:50:33,017 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:50:33,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1376 places, 1734 transitions, 330247 flow. Second operand has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:50:33,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:50:33,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:50:33,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:50:41,614 INFO L124 PetriNetUnfolderBase]: 1948/3844 cut-off events. [2024-02-20 11:50:41,614 INFO L125 PetriNetUnfolderBase]: For 605/605 co-relation queries the response was YES. [2024-02-20 11:50:41,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366669 conditions, 3844 events. 1948/3844 cut-off events. For 605/605 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 28090 event pairs, 0 based on Foata normal form. 0/2942 useless extension candidates. Maximal degree in co-relation 253170. Up to 3812 conditions per place. [2024-02-20 11:50:41,914 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1183 selfloop transitions, 120 changer transitions 457/1761 dead transitions. [2024-02-20 11:50:41,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1402 places, 1761 transitions, 338909 flow [2024-02-20 11:50:41,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-02-20 11:50:41,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-02-20 11:50:41,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 219 transitions. [2024-02-20 11:50:41,915 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3526570048309179 [2024-02-20 11:50:41,915 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1379 predicate places. [2024-02-20 11:50:41,916 INFO L507 AbstractCegarLoop]: Abstraction has has 1402 places, 1761 transitions, 338909 flow [2024-02-20 11:50:41,916 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:50:41,916 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:50:41,916 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:50:41,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2024-02-20 11:50:42,128 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:50:42,128 INFO L432 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:50:42,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:50:42,128 INFO L85 PathProgramCache]: Analyzing trace with hash 983895067, now seen corresponding path program 87 times [2024-02-20 11:50:42,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:50:42,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707097756] [2024-02-20 11:50:42,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:50:42,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:50:42,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:50:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:50:42,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:50:42,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707097756] [2024-02-20 11:50:42,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707097756] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:50:42,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49573953] [2024-02-20 11:50:42,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:50:42,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:50:42,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:50:42,581 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:50:42,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2024-02-20 11:50:43,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-20 11:50:43,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:50:43,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 39 conjunts are in the unsatisfiable core [2024-02-20 11:50:43,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:50:43,151 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:50:43,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-02-20 11:50:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-20 11:50:43,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:50:43,418 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-20 11:50:43,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-02-20 11:50:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:50:43,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49573953] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:50:43,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:50:43,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 24 [2024-02-20 11:50:43,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145631120] [2024-02-20 11:50:43,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:50:43,482 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-20 11:50:43,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:50:43,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-20 11:50:43,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2024-02-20 11:50:43,483 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:50:43,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1402 places, 1761 transitions, 338909 flow. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:50:43,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:50:43,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:50:43,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:50:52,136 INFO L124 PetriNetUnfolderBase]: 1960/3871 cut-off events. [2024-02-20 11:50:52,136 INFO L125 PetriNetUnfolderBase]: For 618/618 co-relation queries the response was YES. [2024-02-20 11:50:52,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373010 conditions, 3871 events. 1960/3871 cut-off events. For 618/618 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 28396 event pairs, 4 based on Foata normal form. 0/2963 useless extension candidates. Maximal degree in co-relation 257359. Up to 3838 conditions per place. [2024-02-20 11:50:52,281 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1223 selfloop transitions, 92 changer transitions 469/1785 dead transitions. [2024-02-20 11:50:52,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1420 places, 1785 transitions, 347103 flow [2024-02-20 11:50:52,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-20 11:50:52,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-20 11:50:52,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 167 transitions. [2024-02-20 11:50:52,283 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.38215102974828374 [2024-02-20 11:50:52,284 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1397 predicate places. [2024-02-20 11:50:52,284 INFO L507 AbstractCegarLoop]: Abstraction has has 1420 places, 1785 transitions, 347103 flow [2024-02-20 11:50:52,284 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:50:52,284 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:50:52,284 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:50:52,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2024-02-20 11:50:52,496 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:50:52,497 INFO L432 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:50:52,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:50:52,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1503867840, now seen corresponding path program 88 times [2024-02-20 11:50:52,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:50:52,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205281260] [2024-02-20 11:50:52,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:50:52,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:50:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:50:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:50:53,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:50:53,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205281260] [2024-02-20 11:50:53,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205281260] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:50:53,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897265035] [2024-02-20 11:50:53,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:50:53,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:50:53,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:50:53,832 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:50:53,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2024-02-20 11:50:54,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:50:54,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:50:54,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 11:50:54,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:50:54,447 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:50:54,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-02-20 11:50:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:50:54,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:50:54,649 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-20 11:50:54,649 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 73 treesize of output 94 [2024-02-20 11:50:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:50:54,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897265035] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:50:54,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:50:54,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 33 [2024-02-20 11:50:54,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920427671] [2024-02-20 11:50:54,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:50:54,687 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-02-20 11:50:54,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:50:54,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-02-20 11:50:54,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2024-02-20 11:50:54,688 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:50:54,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1420 places, 1785 transitions, 347103 flow. Second operand has 33 states, 33 states have (on average 4.606060606060606) internal successors, (152), 33 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:50:54,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:50:54,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:50:54,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:51:04,311 INFO L124 PetriNetUnfolderBase]: 1972/3898 cut-off events. [2024-02-20 11:51:04,311 INFO L125 PetriNetUnfolderBase]: For 621/621 co-relation queries the response was YES. [2024-02-20 11:51:04,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379403 conditions, 3898 events. 1972/3898 cut-off events. For 621/621 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 28605 event pairs, 0 based on Foata normal form. 0/2984 useless extension candidates. Maximal degree in co-relation 261580. Up to 3864 conditions per place. [2024-02-20 11:51:04,458 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 1226 selfloop transitions, 100 changer transitions 469/1796 dead transitions. [2024-02-20 11:51:04,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1441 places, 1796 transitions, 352833 flow [2024-02-20 11:51:04,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-20 11:51:04,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-20 11:51:04,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 160 transitions. [2024-02-20 11:51:04,459 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.31620553359683795 [2024-02-20 11:51:04,460 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1418 predicate places. [2024-02-20 11:51:04,460 INFO L507 AbstractCegarLoop]: Abstraction has has 1441 places, 1796 transitions, 352833 flow [2024-02-20 11:51:04,460 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.606060606060606) internal successors, (152), 33 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:51:04,460 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:51:04,460 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:51:04,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2024-02-20 11:51:04,666 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:51:04,666 INFO L432 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:51:04,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:51:04,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2145075490, now seen corresponding path program 89 times [2024-02-20 11:51:04,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:51:04,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123717357] [2024-02-20 11:51:04,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:51:04,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:51:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:51:05,839 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:51:05,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:51:05,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123717357] [2024-02-20 11:51:05,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123717357] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:51:05,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275130967] [2024-02-20 11:51:05,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:51:05,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:51:05,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:51:05,840 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:51:05,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2024-02-20 11:51:06,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 11:51:06,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:51:06,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 31 conjunts are in the unsatisfiable core [2024-02-20 11:51:06,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:51:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:51:06,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:51:06,626 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-20 11:51:06,626 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 73 treesize of output 94 [2024-02-20 11:51:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:51:06,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275130967] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:51:06,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:51:06,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 9] total 38 [2024-02-20 11:51:06,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914480151] [2024-02-20 11:51:06,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:51:06,721 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-02-20 11:51:06,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:51:06,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-02-20 11:51:06,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2024-02-20 11:51:06,722 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:51:06,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1441 places, 1796 transitions, 352833 flow. Second operand has 38 states, 38 states have (on average 4.7894736842105265) internal successors, (182), 38 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:51:06,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:51:06,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:51:06,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:51:16,455 INFO L124 PetriNetUnfolderBase]: 1968/3894 cut-off events. [2024-02-20 11:51:16,456 INFO L125 PetriNetUnfolderBase]: For 619/619 co-relation queries the response was YES. [2024-02-20 11:51:16,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382874 conditions, 3894 events. 1968/3894 cut-off events. For 619/619 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 28642 event pairs, 8 based on Foata normal form. 0/2984 useless extension candidates. Maximal degree in co-relation 264051. Up to 3860 conditions per place. [2024-02-20 11:51:16,606 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 1222 selfloop transitions, 91 changer transitions 481/1795 dead transitions. [2024-02-20 11:51:16,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1462 places, 1795 transitions, 356225 flow [2024-02-20 11:51:16,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-20 11:51:16,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-20 11:51:16,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 149 transitions. [2024-02-20 11:51:16,608 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.29446640316205536 [2024-02-20 11:51:16,608 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1439 predicate places. [2024-02-20 11:51:16,608 INFO L507 AbstractCegarLoop]: Abstraction has has 1462 places, 1795 transitions, 356225 flow [2024-02-20 11:51:16,608 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.7894736842105265) internal successors, (182), 38 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:51:16,608 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:51:16,608 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:51:16,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2024-02-20 11:51:16,821 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:51:16,821 INFO L432 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:51:16,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:51:16,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1069300386, now seen corresponding path program 90 times [2024-02-20 11:51:16,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:51:16,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003316899] [2024-02-20 11:51:16,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:51:16,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:51:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:51:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:51:18,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:51:18,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003316899] [2024-02-20 11:51:18,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003316899] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:51:18,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753797164] [2024-02-20 11:51:18,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:51:18,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:51:18,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:51:18,050 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:51:18,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2024-02-20 11:51:18,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 11:51:18,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:51:18,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-20 11:51:18,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:51:18,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:51:18,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-02-20 11:51:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:51:18,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:51:18,766 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:51:18,766 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 44 treesize of output 77 [2024-02-20 11:51:18,929 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:51:18,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753797164] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:51:18,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:51:18,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 9] total 35 [2024-02-20 11:51:18,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243147556] [2024-02-20 11:51:18,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:51:18,930 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-02-20 11:51:18,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:51:18,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-02-20 11:51:18,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2024-02-20 11:51:18,946 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:51:18,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1462 places, 1795 transitions, 356225 flow. Second operand has 35 states, 35 states have (on average 4.742857142857143) internal successors, (166), 35 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:51:18,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:51:18,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:51:18,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:51:29,159 INFO L124 PetriNetUnfolderBase]: 1988/3962 cut-off events. [2024-02-20 11:51:29,160 INFO L125 PetriNetUnfolderBase]: For 633/633 co-relation queries the response was YES. [2024-02-20 11:51:29,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393151 conditions, 3962 events. 1988/3962 cut-off events. For 633/633 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 29487 event pairs, 8 based on Foata normal form. 0/3044 useless extension candidates. Maximal degree in co-relation 271118. Up to 3924 conditions per place. [2024-02-20 11:51:29,453 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1214 selfloop transitions, 125 changer transitions 490/1830 dead transitions. [2024-02-20 11:51:29,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1491 places, 1830 transitions, 366837 flow [2024-02-20 11:51:29,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-02-20 11:51:29,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-02-20 11:51:29,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 248 transitions. [2024-02-20 11:51:29,454 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.35942028985507246 [2024-02-20 11:51:29,454 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1468 predicate places. [2024-02-20 11:51:29,454 INFO L507 AbstractCegarLoop]: Abstraction has has 1491 places, 1830 transitions, 366837 flow [2024-02-20 11:51:29,455 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.742857142857143) internal successors, (166), 35 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:51:29,455 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:51:29,455 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:51:29,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2024-02-20 11:51:29,660 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2024-02-20 11:51:29,660 INFO L432 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:51:29,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:51:29,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1889145059, now seen corresponding path program 91 times [2024-02-20 11:51:29,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:51:29,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952364943] [2024-02-20 11:51:29,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:51:29,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:51:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:51:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-20 11:51:30,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:51:30,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952364943] [2024-02-20 11:51:30,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952364943] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:51:30,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231677770] [2024-02-20 11:51:30,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:51:30,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:51:30,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:51:30,434 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:51:30,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2024-02-20 11:51:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:51:30,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 11:51:30,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:51:30,936 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:51:30,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-02-20 11:51:30,965 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:51:30,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:51:31,074 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:51:31,075 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 71 treesize of output 88 [2024-02-20 11:51:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:51:31,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231677770] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:51:31,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:51:31,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 28 [2024-02-20 11:51:31,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020423723] [2024-02-20 11:51:31,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:51:31,134 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-02-20 11:51:31,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:51:31,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-02-20 11:51:31,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2024-02-20 11:51:31,135 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:51:31,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1491 places, 1830 transitions, 366837 flow. Second operand has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:51:31,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:51:31,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:51:31,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:51:41,531 INFO L124 PetriNetUnfolderBase]: 2008/4012 cut-off events. [2024-02-20 11:51:41,532 INFO L125 PetriNetUnfolderBase]: For 637/637 co-relation queries the response was YES. [2024-02-20 11:51:41,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401934 conditions, 4012 events. 2008/4012 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 29993 event pairs, 10 based on Foata normal form. 0/3086 useless extension candidates. Maximal degree in co-relation 277061. Up to 3972 conditions per place. [2024-02-20 11:51:41,696 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1224 selfloop transitions, 131 changer transitions 490/1846 dead transitions. [2024-02-20 11:51:41,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1519 places, 1846 transitions, 373739 flow [2024-02-20 11:51:41,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-02-20 11:51:41,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-02-20 11:51:41,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 252 transitions. [2024-02-20 11:51:41,698 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3778110944527736 [2024-02-20 11:51:41,698 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1496 predicate places. [2024-02-20 11:51:41,698 INFO L507 AbstractCegarLoop]: Abstraction has has 1519 places, 1846 transitions, 373739 flow [2024-02-20 11:51:41,698 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:51:41,698 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:51:41,698 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:51:41,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2024-02-20 11:51:41,904 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2024-02-20 11:51:41,905 INFO L432 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:51:41,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:51:41,905 INFO L85 PathProgramCache]: Analyzing trace with hash 26586395, now seen corresponding path program 92 times [2024-02-20 11:51:41,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:51:41,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772318255] [2024-02-20 11:51:41,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:51:41,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:51:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:51:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:51:42,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:51:42,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772318255] [2024-02-20 11:51:42,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772318255] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:51:42,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953020531] [2024-02-20 11:51:42,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:51:42,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:51:42,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:51:42,952 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:51:42,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2024-02-20 11:51:43,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:51:43,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:51:43,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2024-02-20 11:51:43,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:51:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-20 11:51:43,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:51:43,663 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-20 11:51:43,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-02-20 11:51:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:51:43,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953020531] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:51:43,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:51:43,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 9] total 34 [2024-02-20 11:51:43,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657170333] [2024-02-20 11:51:43,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:51:43,718 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-02-20 11:51:43,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:51:43,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-02-20 11:51:43,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2024-02-20 11:51:43,724 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:51:43,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1519 places, 1846 transitions, 373739 flow. Second operand has 34 states, 34 states have (on average 4.852941176470588) internal successors, (165), 34 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:51:43,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:51:43,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:51:43,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:51:54,451 INFO L124 PetriNetUnfolderBase]: 2024/4040 cut-off events. [2024-02-20 11:51:54,452 INFO L125 PetriNetUnfolderBase]: For 641/641 co-relation queries the response was YES. [2024-02-20 11:51:54,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 408767 conditions, 4040 events. 2024/4040 cut-off events. For 641/641 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 30215 event pairs, 4 based on Foata normal form. 0/3110 useless extension candidates. Maximal degree in co-relation 281844. Up to 4000 conditions per place. [2024-02-20 11:51:54,729 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1269 selfloop transitions, 98 changer transitions 490/1858 dead transitions. [2024-02-20 11:51:54,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1541 places, 1858 transitions, 379883 flow [2024-02-20 11:51:54,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-20 11:51:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-20 11:51:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 191 transitions. [2024-02-20 11:51:54,730 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3610586011342155 [2024-02-20 11:51:54,730 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1518 predicate places. [2024-02-20 11:51:54,730 INFO L507 AbstractCegarLoop]: Abstraction has has 1541 places, 1858 transitions, 379883 flow [2024-02-20 11:51:54,730 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.852941176470588) internal successors, (165), 34 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:51:54,730 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:51:54,731 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:51:54,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2024-02-20 11:51:54,943 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2024-02-20 11:51:54,944 INFO L432 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:51:54,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:51:54,944 INFO L85 PathProgramCache]: Analyzing trace with hash 477548801, now seen corresponding path program 93 times [2024-02-20 11:51:54,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:51:54,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198477690] [2024-02-20 11:51:54,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:51:54,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:51:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:51:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:51:55,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:51:55,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198477690] [2024-02-20 11:51:55,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198477690] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:51:55,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025849843] [2024-02-20 11:51:55,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:51:55,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:51:55,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:51:55,432 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:51:55,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2024-02-20 11:51:55,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 11:51:55,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:51:55,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 39 conjunts are in the unsatisfiable core [2024-02-20 11:51:55,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:51:56,053 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:51:56,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-02-20 11:51:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-20 11:51:56,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:51:56,198 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:51:56,199 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 44 treesize of output 77 [2024-02-20 11:51:56,255 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:51:56,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025849843] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:51:56,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:51:56,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 24 [2024-02-20 11:51:56,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518042137] [2024-02-20 11:51:56,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:51:56,256 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-20 11:51:56,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:51:56,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-20 11:51:56,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2024-02-20 11:51:56,257 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:51:56,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1541 places, 1858 transitions, 379883 flow. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:51:56,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:51:56,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:51:56,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:52:07,848 INFO L124 PetriNetUnfolderBase]: 2041/4063 cut-off events. [2024-02-20 11:52:07,848 INFO L125 PetriNetUnfolderBase]: For 650/650 co-relation queries the response was YES. [2024-02-20 11:52:07,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415342 conditions, 4063 events. 2041/4063 cut-off events. For 650/650 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 30331 event pairs, 0 based on Foata normal form. 0/3139 useless extension candidates. Maximal degree in co-relation 286976. Up to 4025 conditions per place. [2024-02-20 11:52:08,022 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1240 selfloop transitions, 125 changer transitions 523/1889 dead transitions. [2024-02-20 11:52:08,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1575 places, 1889 transitions, 389995 flow [2024-02-20 11:52:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-02-20 11:52:08,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-02-20 11:52:08,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 323 transitions. [2024-02-20 11:52:08,023 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3695652173913043 [2024-02-20 11:52:08,023 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1552 predicate places. [2024-02-20 11:52:08,024 INFO L507 AbstractCegarLoop]: Abstraction has has 1575 places, 1889 transitions, 389995 flow [2024-02-20 11:52:08,024 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:52:08,024 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:52:08,024 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:52:08,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2024-02-20 11:52:08,236 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:52:08,236 INFO L432 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:52:08,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:52:08,236 INFO L85 PathProgramCache]: Analyzing trace with hash -600121753, now seen corresponding path program 94 times [2024-02-20 11:52:08,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:52:08,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269937263] [2024-02-20 11:52:08,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:52:08,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:52:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:52:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:52:08,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:52:08,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269937263] [2024-02-20 11:52:08,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269937263] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:52:08,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92442489] [2024-02-20 11:52:08,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:52:08,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:52:08,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:52:08,882 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:52:08,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2024-02-20 11:52:09,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:52:09,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:52:09,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 11:52:09,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:52:09,484 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:52:09,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-02-20 11:52:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:52:09,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:52:09,678 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-20 11:52:09,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-02-20 11:52:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:52:09,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92442489] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:52:09,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:52:09,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2024-02-20 11:52:09,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671739293] [2024-02-20 11:52:09,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:52:09,718 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-20 11:52:09,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:52:09,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-20 11:52:09,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-02-20 11:52:09,719 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:52:09,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1575 places, 1889 transitions, 389995 flow. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:52:09,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:52:09,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:52:09,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:52:21,515 INFO L124 PetriNetUnfolderBase]: 2059/4090 cut-off events. [2024-02-20 11:52:21,516 INFO L125 PetriNetUnfolderBase]: For 651/651 co-relation queries the response was YES. [2024-02-20 11:52:21,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422282 conditions, 4090 events. 2059/4090 cut-off events. For 651/651 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 30493 event pairs, 10 based on Foata normal form. 0/3166 useless extension candidates. Maximal degree in co-relation 292050. Up to 4053 conditions per place. [2024-02-20 11:52:21,694 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 1285 selfloop transitions, 91 changer transitions 523/1900 dead transitions. [2024-02-20 11:52:21,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1592 places, 1900 transitions, 396062 flow [2024-02-20 11:52:21,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-20 11:52:21,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-20 11:52:21,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 174 transitions. [2024-02-20 11:52:21,695 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.39816933638443935 [2024-02-20 11:52:21,696 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1569 predicate places. [2024-02-20 11:52:21,696 INFO L507 AbstractCegarLoop]: Abstraction has has 1592 places, 1900 transitions, 396062 flow [2024-02-20 11:52:21,696 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:52:21,696 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:52:21,696 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:52:21,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2024-02-20 11:52:21,909 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2024-02-20 11:52:21,909 INFO L432 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:52:21,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:52:21,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1100809698, now seen corresponding path program 95 times [2024-02-20 11:52:21,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:52:21,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723290561] [2024-02-20 11:52:21,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:52:21,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:52:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:52:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-02-20 11:52:22,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:52:22,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723290561] [2024-02-20 11:52:22,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723290561] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:52:22,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44000394] [2024-02-20 11:52:22,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:52:22,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:52:22,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:52:22,905 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:52:22,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2024-02-20 11:52:23,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 11:52:23,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:52:23,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 31 conjunts are in the unsatisfiable core [2024-02-20 11:52:23,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:52:23,631 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:52:23,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 45 [2024-02-20 11:52:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:52:23,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:52:23,891 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-20 11:52:23,892 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 73 treesize of output 94 [2024-02-20 11:52:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:52:23,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44000394] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:52:23,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:52:23,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 9] total 34 [2024-02-20 11:52:23,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946215098] [2024-02-20 11:52:23,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:52:23,980 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-02-20 11:52:23,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:52:23,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-02-20 11:52:23,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2024-02-20 11:52:23,981 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:52:23,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1592 places, 1900 transitions, 396062 flow. Second operand has 34 states, 34 states have (on average 4.911764705882353) internal successors, (167), 34 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:52:23,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:52:23,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:52:23,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:52:35,746 INFO L124 PetriNetUnfolderBase]: 2049/4069 cut-off events. [2024-02-20 11:52:35,746 INFO L125 PetriNetUnfolderBase]: For 630/630 co-relation queries the response was YES. [2024-02-20 11:52:35,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424234 conditions, 4069 events. 2049/4069 cut-off events. For 630/630 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 30360 event pairs, 6 based on Foata normal form. 0/3153 useless extension candidates. Maximal degree in co-relation 294018. Up to 4033 conditions per place. [2024-02-20 11:52:35,926 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 1270 selfloop transitions, 94 changer transitions 527/1892 dead transitions. [2024-02-20 11:52:35,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1608 places, 1892 transitions, 398174 flow [2024-02-20 11:52:35,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-20 11:52:35,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-20 11:52:35,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 137 transitions. [2024-02-20 11:52:35,927 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.35038363171355497 [2024-02-20 11:52:35,927 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1585 predicate places. [2024-02-20 11:52:35,927 INFO L507 AbstractCegarLoop]: Abstraction has has 1608 places, 1892 transitions, 398174 flow [2024-02-20 11:52:35,928 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.911764705882353) internal successors, (167), 34 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:52:35,928 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:52:35,928 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:52:35,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2024-02-20 11:52:36,147 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2024-02-20 11:52:36,147 INFO L432 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:52:36,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:52:36,148 INFO L85 PathProgramCache]: Analyzing trace with hash -173004310, now seen corresponding path program 96 times [2024-02-20 11:52:36,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:52:36,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708060809] [2024-02-20 11:52:36,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:52:36,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:52:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:52:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:52:36,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:52:36,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708060809] [2024-02-20 11:52:36,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708060809] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:52:36,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990656970] [2024-02-20 11:52:36,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:52:36,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:52:36,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:52:36,700 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:52:36,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2024-02-20 11:52:37,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 11:52:37,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:52:37,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 50 conjunts are in the unsatisfiable core [2024-02-20 11:52:37,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:52:37,609 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:52:37,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-02-20 11:52:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-20 11:52:37,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:52:37,913 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:52:37,914 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 71 treesize of output 88 [2024-02-20 11:52:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:52:38,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990656970] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:52:38,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:52:38,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 28 [2024-02-20 11:52:38,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439593289] [2024-02-20 11:52:38,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:52:38,018 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-02-20 11:52:38,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:52:38,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-02-20 11:52:38,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2024-02-20 11:52:38,019 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:52:38,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1608 places, 1892 transitions, 398174 flow. Second operand has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:52:38,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:52:38,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:52:38,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:52:51,224 INFO L124 PetriNetUnfolderBase]: 2040/4056 cut-off events. [2024-02-20 11:52:51,224 INFO L125 PetriNetUnfolderBase]: For 645/645 co-relation queries the response was YES. [2024-02-20 11:52:51,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427101 conditions, 4056 events. 2040/4056 cut-off events. For 645/645 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 30210 event pairs, 0 based on Foata normal form. 2/3152 useless extension candidates. Maximal degree in co-relation 296712. Up to 4022 conditions per place. [2024-02-20 11:52:51,398 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1233 selfloop transitions, 105 changer transitions 549/1888 dead transitions. [2024-02-20 11:52:51,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1647 places, 1888 transitions, 401108 flow [2024-02-20 11:52:51,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-02-20 11:52:51,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-02-20 11:52:51,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 324 transitions. [2024-02-20 11:52:51,399 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3521739130434783 [2024-02-20 11:52:51,399 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1624 predicate places. [2024-02-20 11:52:51,399 INFO L507 AbstractCegarLoop]: Abstraction has has 1647 places, 1888 transitions, 401108 flow [2024-02-20 11:52:51,400 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:52:51,400 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:52:51,400 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:52:51,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2024-02-20 11:52:51,611 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:52:51,611 INFO L432 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:52:51,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:52:51,611 INFO L85 PathProgramCache]: Analyzing trace with hash -479759871, now seen corresponding path program 97 times [2024-02-20 11:52:51,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:52:51,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352851642] [2024-02-20 11:52:51,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:52:51,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:52:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:52:52,971 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:52:52,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:52:52,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352851642] [2024-02-20 11:52:52,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352851642] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:52:52,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228649644] [2024-02-20 11:52:52,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:52:52,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:52:52,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:52:52,973 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:52:52,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2024-02-20 11:52:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:52:53,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 11:52:53,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:52:53,561 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-02-20 11:52:53,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 9 [2024-02-20 11:52:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:52:53,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:52:53,706 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:52:53,707 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 44 treesize of output 77 [2024-02-20 11:52:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:52:53,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228649644] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:52:53,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:52:53,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 33 [2024-02-20 11:52:53,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427188005] [2024-02-20 11:52:53,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:52:53,769 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-02-20 11:52:53,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:52:53,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-02-20 11:52:53,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2024-02-20 11:52:53,769 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:52:53,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1647 places, 1888 transitions, 401108 flow. Second operand has 33 states, 33 states have (on average 4.757575757575758) internal successors, (157), 33 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:52:53,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:52:53,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:52:53,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:53:07,503 INFO L124 PetriNetUnfolderBase]: 2033/4039 cut-off events. [2024-02-20 11:53:07,503 INFO L125 PetriNetUnfolderBase]: For 632/632 co-relation queries the response was YES. [2024-02-20 11:53:07,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429516 conditions, 4039 events. 2033/4039 cut-off events. For 632/632 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29977 event pairs, 4 based on Foata normal form. 0/3147 useless extension candidates. Maximal degree in co-relation 298976. Up to 4007 conditions per place. [2024-02-20 11:53:07,678 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1210 selfloop transitions, 120 changer transitions 549/1880 dead transitions. [2024-02-20 11:53:07,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1680 places, 1880 transitions, 403161 flow [2024-02-20 11:53:07,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-02-20 11:53:07,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-02-20 11:53:07,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 269 transitions. [2024-02-20 11:53:07,680 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.34398976982097185 [2024-02-20 11:53:07,680 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1657 predicate places. [2024-02-20 11:53:07,680 INFO L507 AbstractCegarLoop]: Abstraction has has 1680 places, 1880 transitions, 403161 flow [2024-02-20 11:53:07,680 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.757575757575758) internal successors, (157), 33 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:53:07,680 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:53:07,680 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:53:07,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2024-02-20 11:53:07,893 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:53:07,894 INFO L432 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:53:07,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:53:07,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1472358528, now seen corresponding path program 98 times [2024-02-20 11:53:07,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:53:07,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538555415] [2024-02-20 11:53:07,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:53:07,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:53:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:53:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:53:08,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:53:08,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538555415] [2024-02-20 11:53:08,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538555415] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:53:08,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879017826] [2024-02-20 11:53:08,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:53:08,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:53:08,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:53:08,323 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:53:08,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2024-02-20 11:53:08,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:53:08,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:53:08,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 39 conjunts are in the unsatisfiable core [2024-02-20 11:53:08,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:53:09,046 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:53:09,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-02-20 11:53:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-20 11:53:09,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:53:09,198 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:53:09,198 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 44 treesize of output 77 [2024-02-20 11:53:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:53:09,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879017826] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:53:09,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:53:09,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 22 [2024-02-20 11:53:09,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987404382] [2024-02-20 11:53:09,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:53:09,279 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-20 11:53:09,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:53:09,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-20 11:53:09,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-02-20 11:53:09,279 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:53:09,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1680 places, 1880 transitions, 403161 flow. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:53:09,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:53:09,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:53:09,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:53:21,912 INFO L124 PetriNetUnfolderBase]: 2033/4025 cut-off events. [2024-02-20 11:53:21,913 INFO L125 PetriNetUnfolderBase]: For 632/632 co-relation queries the response was YES. [2024-02-20 11:53:21,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432222 conditions, 4025 events. 2033/4025 cut-off events. For 632/632 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 29778 event pairs, 6 based on Foata normal form. 0/3137 useless extension candidates. Maximal degree in co-relation 302202. Up to 3995 conditions per place. [2024-02-20 11:53:22,101 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1215 selfloop transitions, 109 changer transitions 549/1874 dead transitions. [2024-02-20 11:53:22,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1706 places, 1874 transitions, 405611 flow [2024-02-20 11:53:22,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-20 11:53:22,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-20 11:53:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 229 transitions. [2024-02-20 11:53:22,102 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3555900621118012 [2024-02-20 11:53:22,102 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1683 predicate places. [2024-02-20 11:53:22,102 INFO L507 AbstractCegarLoop]: Abstraction has has 1706 places, 1874 transitions, 405611 flow [2024-02-20 11:53:22,102 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:53:22,103 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:53:22,103 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:53:22,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2024-02-20 11:53:22,316 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2024-02-20 11:53:22,316 INFO L432 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:53:22,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:53:22,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1015404379, now seen corresponding path program 99 times [2024-02-20 11:53:22,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:53:22,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912340911] [2024-02-20 11:53:22,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:53:22,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:53:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:53:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:53:22,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:53:22,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912340911] [2024-02-20 11:53:22,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912340911] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:53:22,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927575654] [2024-02-20 11:53:22,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:53:22,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:53:22,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:53:22,895 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:53:22,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2024-02-20 11:53:23,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 11:53:23,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:53:23,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 39 conjunts are in the unsatisfiable core [2024-02-20 11:53:23,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:53:23,503 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:53:23,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-02-20 11:53:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-20 11:53:23,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:53:23,650 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:53:23,651 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 71 treesize of output 88 [2024-02-20 11:53:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:53:23,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927575654] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:53:23,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:53:23,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 22 [2024-02-20 11:53:23,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012483919] [2024-02-20 11:53:23,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:53:23,728 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-20 11:53:23,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:53:23,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-20 11:53:23,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-02-20 11:53:23,729 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:53:23,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1706 places, 1874 transitions, 405611 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:53:23,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:53:23,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:53:23,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:53:36,082 INFO L124 PetriNetUnfolderBase]: 2025/3999 cut-off events. [2024-02-20 11:53:36,083 INFO L125 PetriNetUnfolderBase]: For 632/632 co-relation queries the response was YES. [2024-02-20 11:53:36,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433598 conditions, 3999 events. 2025/3999 cut-off events. For 632/632 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 29518 event pairs, 0 based on Foata normal form. 0/3119 useless extension candidates. Maximal degree in co-relation 303256. Up to 3971 conditions per place. [2024-02-20 11:53:36,269 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1211 selfloop transitions, 103 changer transitions 553/1868 dead transitions. [2024-02-20 11:53:36,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1733 places, 1868 transitions, 408043 flow [2024-02-20 11:53:36,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-20 11:53:36,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-20 11:53:36,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 232 transitions. [2024-02-20 11:53:36,270 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.36024844720496896 [2024-02-20 11:53:36,270 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1710 predicate places. [2024-02-20 11:53:36,271 INFO L507 AbstractCegarLoop]: Abstraction has has 1733 places, 1868 transitions, 408043 flow [2024-02-20 11:53:36,271 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:53:36,271 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:53:36,271 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:53:36,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2024-02-20 11:53:36,484 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:53:36,484 INFO L432 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:53:36,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:53:36,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1979860831, now seen corresponding path program 100 times [2024-02-20 11:53:36,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:53:36,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299236400] [2024-02-20 11:53:36,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:53:36,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:53:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:53:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-20 11:53:37,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:53:37,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299236400] [2024-02-20 11:53:37,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299236400] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:53:37,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442748329] [2024-02-20 11:53:37,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:53:37,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:53:37,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:53:37,306 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:53:37,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2024-02-20 11:53:37,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:53:37,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:53:37,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 11:53:37,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:53:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:53:37,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:53:38,050 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-20 11:53:38,051 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 73 treesize of output 94 [2024-02-20 11:53:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:53:38,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442748329] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:53:38,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:53:38,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-02-20 11:53:38,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036862219] [2024-02-20 11:53:38,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:53:38,128 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-02-20 11:53:38,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:53:38,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-02-20 11:53:38,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2024-02-20 11:53:38,128 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:53:38,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1733 places, 1868 transitions, 408043 flow. Second operand has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 30 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:53:38,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:53:38,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:53:38,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:53:50,420 INFO L124 PetriNetUnfolderBase]: 2021/3995 cut-off events. [2024-02-20 11:53:50,420 INFO L125 PetriNetUnfolderBase]: For 634/634 co-relation queries the response was YES. [2024-02-20 11:53:50,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437132 conditions, 3995 events. 2021/3995 cut-off events. For 634/634 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 29509 event pairs, 6 based on Foata normal form. 0/3119 useless extension candidates. Maximal degree in co-relation 305598. Up to 3967 conditions per place. [2024-02-20 11:53:50,722 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1266 selfloop transitions, 54 changer transitions 568/1889 dead transitions. [2024-02-20 11:53:50,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1755 places, 1889 transitions, 416406 flow [2024-02-20 11:53:50,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-20 11:53:50,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-20 11:53:50,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 159 transitions. [2024-02-20 11:53:50,724 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3005671077504726 [2024-02-20 11:53:50,724 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1732 predicate places. [2024-02-20 11:53:50,724 INFO L507 AbstractCegarLoop]: Abstraction has has 1755 places, 1889 transitions, 416406 flow [2024-02-20 11:53:50,724 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 30 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:53:50,724 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:53:50,725 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:53:50,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2024-02-20 11:53:50,938 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:53:50,938 INFO L432 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:53:50,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:53:50,939 INFO L85 PathProgramCache]: Analyzing trace with hash -818385057, now seen corresponding path program 101 times [2024-02-20 11:53:50,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:53:50,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418426755] [2024-02-20 11:53:50,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:53:50,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:53:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:53:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:53:51,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:53:51,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418426755] [2024-02-20 11:53:51,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418426755] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:53:51,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305396461] [2024-02-20 11:53:51,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:53:51,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:53:51,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:53:51,587 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:53:51,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2024-02-20 11:53:52,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 11:53:52,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:53:52,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 11:53:52,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:53:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:53:52,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:53:52,293 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-20 11:53:52,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-02-20 11:53:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:53:52,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305396461] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:53:52,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:53:52,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2024-02-20 11:53:52,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163263713] [2024-02-20 11:53:52,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:53:52,345 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-20 11:53:52,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:53:52,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-20 11:53:52,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2024-02-20 11:53:52,359 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:53:52,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1755 places, 1889 transitions, 416406 flow. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:53:52,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:53:52,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:53:52,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:54:05,265 INFO L124 PetriNetUnfolderBase]: 2061/4065 cut-off events. [2024-02-20 11:54:05,265 INFO L125 PetriNetUnfolderBase]: For 637/637 co-relation queries the response was YES. [2024-02-20 11:54:05,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448877 conditions, 4065 events. 2061/4065 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 30088 event pairs, 10 based on Foata normal form. 0/3179 useless extension candidates. Maximal degree in co-relation 313926. Up to 4037 conditions per place. [2024-02-20 11:54:05,458 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 1295 selfloop transitions, 55 changer transitions 568/1919 dead transitions. [2024-02-20 11:54:05,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1780 places, 1919 transitions, 426857 flow [2024-02-20 11:54:05,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-20 11:54:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-20 11:54:05,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 219 transitions. [2024-02-20 11:54:05,459 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.36622073578595316 [2024-02-20 11:54:05,459 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1757 predicate places. [2024-02-20 11:54:05,460 INFO L507 AbstractCegarLoop]: Abstraction has has 1780 places, 1919 transitions, 426857 flow [2024-02-20 11:54:05,460 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:54:05,460 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:54:05,460 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:54:05,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2024-02-20 11:54:05,672 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2024-02-20 11:54:05,673 INFO L432 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:54:05,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:54:05,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1945781150, now seen corresponding path program 102 times [2024-02-20 11:54:05,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:54:05,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578355063] [2024-02-20 11:54:05,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:54:05,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:54:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:54:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-20 11:54:06,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:54:06,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578355063] [2024-02-20 11:54:06,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578355063] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:54:06,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026649976] [2024-02-20 11:54:06,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:54:06,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:54:06,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:54:06,637 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:54:06,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2024-02-20 11:54:07,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 11:54:07,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:54:07,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-20 11:54:07,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:54:07,442 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:54:07,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-02-20 11:54:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:54:07,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:54:07,612 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-20 11:54:07,612 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 73 treesize of output 94 [2024-02-20 11:54:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:54:07,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026649976] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:54:07,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:54:07,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 28 [2024-02-20 11:54:07,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838866974] [2024-02-20 11:54:07,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:54:07,680 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-02-20 11:54:07,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:54:07,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-02-20 11:54:07,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2024-02-20 11:54:07,681 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:54:07,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1780 places, 1919 transitions, 426857 flow. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:54:07,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:54:07,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:54:07,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:54:22,484 INFO L124 PetriNetUnfolderBase]: 2101/4165 cut-off events. [2024-02-20 11:54:22,484 INFO L125 PetriNetUnfolderBase]: For 661/661 co-relation queries the response was YES. [2024-02-20 11:54:22,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463685 conditions, 4165 events. 2101/4165 cut-off events. For 661/661 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 31155 event pairs, 6 based on Foata normal form. 0/3263 useless extension candidates. Maximal degree in co-relation 323922. Up to 4133 conditions per place. [2024-02-20 11:54:22,685 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1300 selfloop transitions, 80 changer transitions 579/1960 dead transitions. [2024-02-20 11:54:22,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1806 places, 1960 transitions, 439901 flow [2024-02-20 11:54:22,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-02-20 11:54:22,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-02-20 11:54:22,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 232 transitions. [2024-02-20 11:54:22,686 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.37359098228663445 [2024-02-20 11:54:22,691 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1783 predicate places. [2024-02-20 11:54:22,691 INFO L507 AbstractCegarLoop]: Abstraction has has 1806 places, 1960 transitions, 439901 flow [2024-02-20 11:54:22,691 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:54:22,691 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:54:22,692 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:54:22,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2024-02-20 11:54:22,905 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:54:22,905 INFO L432 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:54:22,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:54:22,905 INFO L85 PathProgramCache]: Analyzing trace with hash 19825506, now seen corresponding path program 103 times [2024-02-20 11:54:22,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:54:22,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113911487] [2024-02-20 11:54:22,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:54:22,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:54:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:54:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:54:23,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:54:23,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113911487] [2024-02-20 11:54:23,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113911487] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:54:23,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532334398] [2024-02-20 11:54:23,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:54:23,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:54:23,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:54:23,473 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:54:23,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2024-02-20 11:54:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:54:23,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 23 conjunts are in the unsatisfiable core [2024-02-20 11:54:23,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:54:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:54:24,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:54:24,173 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-20 11:54:24,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-02-20 11:54:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:54:24,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532334398] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:54:24,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:54:24,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2024-02-20 11:54:24,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157730737] [2024-02-20 11:54:24,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:54:24,223 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-20 11:54:24,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:54:24,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-20 11:54:24,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2024-02-20 11:54:24,224 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:54:24,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1806 places, 1960 transitions, 439901 flow. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:54:24,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:54:24,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:54:24,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:54:39,032 INFO L124 PetriNetUnfolderBase]: 2114/4176 cut-off events. [2024-02-20 11:54:39,033 INFO L125 PetriNetUnfolderBase]: For 640/640 co-relation queries the response was YES. [2024-02-20 11:54:39,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 469283 conditions, 4176 events. 2114/4176 cut-off events. For 640/640 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 31179 event pairs, 4 based on Foata normal form. 0/3276 useless extension candidates. Maximal degree in co-relation 329865. Up to 4146 conditions per place. [2024-02-20 11:54:39,240 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1326 selfloop transitions, 52 changer transitions 587/1966 dead transitions. [2024-02-20 11:54:39,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1829 places, 1966 transitions, 445163 flow [2024-02-20 11:54:39,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-20 11:54:39,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-20 11:54:39,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 183 transitions. [2024-02-20 11:54:39,241 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.33152173913043476 [2024-02-20 11:54:39,241 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1806 predicate places. [2024-02-20 11:54:39,242 INFO L507 AbstractCegarLoop]: Abstraction has has 1829 places, 1966 transitions, 445163 flow [2024-02-20 11:54:39,242 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:54:39,242 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:54:39,242 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:54:39,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2024-02-20 11:54:39,456 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2024-02-20 11:54:39,456 INFO L432 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:54:39,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:54:39,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1372050620, now seen corresponding path program 104 times [2024-02-20 11:54:39,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:54:39,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567910804] [2024-02-20 11:54:39,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:54:39,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:54:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:54:40,068 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:54:40,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:54:40,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567910804] [2024-02-20 11:54:40,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567910804] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:54:40,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398047277] [2024-02-20 11:54:40,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:54:40,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:54:40,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:54:40,070 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:54:40,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2024-02-20 11:54:40,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:54:40,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:54:40,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 39 conjunts are in the unsatisfiable core [2024-02-20 11:54:40,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:54:40,698 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:54:40,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-02-20 11:54:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-20 11:54:40,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:54:40,848 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:54:40,849 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 71 treesize of output 88 [2024-02-20 11:54:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:54:40,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398047277] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:54:40,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:54:40,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 23 [2024-02-20 11:54:40,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551980356] [2024-02-20 11:54:40,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:54:40,930 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-20 11:54:40,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:54:40,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-20 11:54:40,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-02-20 11:54:40,930 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:54:40,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1829 places, 1966 transitions, 445163 flow. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:54:40,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:54:40,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:54:40,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:54:54,738 INFO L124 PetriNetUnfolderBase]: 2138/4230 cut-off events. [2024-02-20 11:54:54,739 INFO L125 PetriNetUnfolderBase]: For 658/658 co-relation queries the response was YES. [2024-02-20 11:54:54,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479368 conditions, 4230 events. 2138/4230 cut-off events. For 658/658 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 31678 event pairs, 2 based on Foata normal form. 0/3318 useless extension candidates. Maximal degree in co-relation 336432. Up to 4198 conditions per place. [2024-02-20 11:54:54,935 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1333 selfloop transitions, 64 changer transitions 587/1985 dead transitions. [2024-02-20 11:54:54,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1851 places, 1985 transitions, 453437 flow [2024-02-20 11:54:54,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-20 11:54:54,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-20 11:54:54,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 205 transitions. [2024-02-20 11:54:54,936 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.387523629489603 [2024-02-20 11:54:54,937 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1828 predicate places. [2024-02-20 11:54:54,937 INFO L507 AbstractCegarLoop]: Abstraction has has 1851 places, 1985 transitions, 453437 flow [2024-02-20 11:54:54,937 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:54:54,937 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:54:54,937 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:54:54,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2024-02-20 11:54:55,145 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:54:55,146 INFO L432 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:54:55,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:54:55,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1653567865, now seen corresponding path program 105 times [2024-02-20 11:54:55,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:54:55,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955648567] [2024-02-20 11:54:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:54:55,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:54:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:54:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:54:56,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:54:56,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955648567] [2024-02-20 11:54:56,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955648567] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:54:56,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032729165] [2024-02-20 11:54:56,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:54:56,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:54:56,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:54:56,174 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:54:56,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2024-02-20 11:54:56,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 11:54:56,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:54:56,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 35 conjunts are in the unsatisfiable core [2024-02-20 11:54:56,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:54:56,811 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:54:56,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-02-20 11:54:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:54:56,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:54:56,975 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:54:56,975 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 71 treesize of output 88 [2024-02-20 11:54:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:54:57,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032729165] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:54:57,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:54:57,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 9] total 33 [2024-02-20 11:54:57,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476529073] [2024-02-20 11:54:57,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:54:57,086 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-02-20 11:54:57,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:54:57,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-02-20 11:54:57,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2024-02-20 11:54:57,087 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:54:57,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1851 places, 1985 transitions, 453437 flow. Second operand has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:54:57,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:54:57,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:54:57,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:55:13,245 INFO L124 PetriNetUnfolderBase]: 2177/4357 cut-off events. [2024-02-20 11:55:13,245 INFO L125 PetriNetUnfolderBase]: For 682/682 co-relation queries the response was YES. [2024-02-20 11:55:13,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497396 conditions, 4357 events. 2177/4357 cut-off events. For 682/682 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 33057 event pairs, 8 based on Foata normal form. 0/3423 useless extension candidates. Maximal degree in co-relation 347088. Up to 4318 conditions per place. [2024-02-20 11:55:13,449 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1364 selfloop transitions, 75 changer transitions 602/2042 dead transitions. [2024-02-20 11:55:13,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1879 places, 2042 transitions, 470563 flow [2024-02-20 11:55:13,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-02-20 11:55:13,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-02-20 11:55:13,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 249 transitions. [2024-02-20 11:55:13,450 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3733133433283358 [2024-02-20 11:55:13,450 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1856 predicate places. [2024-02-20 11:55:13,450 INFO L507 AbstractCegarLoop]: Abstraction has has 1879 places, 2042 transitions, 470563 flow [2024-02-20 11:55:13,451 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:55:13,451 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:55:13,451 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:55:13,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2024-02-20 11:55:13,663 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2024-02-20 11:55:13,664 INFO L432 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:55:13,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:55:13,664 INFO L85 PathProgramCache]: Analyzing trace with hash -834195042, now seen corresponding path program 106 times [2024-02-20 11:55:13,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:55:13,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78636360] [2024-02-20 11:55:13,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:55:13,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:55:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:55:14,596 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:55:14,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:55:14,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78636360] [2024-02-20 11:55:14,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78636360] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:55:14,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206762871] [2024-02-20 11:55:14,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:55:14,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:55:14,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:55:14,598 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:55:14,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2024-02-20 11:55:15,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:55:15,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:55:15,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 11:55:15,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:55:15,251 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:55:15,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-02-20 11:55:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:55:15,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:55:15,443 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:55:15,443 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 44 treesize of output 77 [2024-02-20 11:55:15,536 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:55:15,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206762871] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:55:15,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:55:15,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 34 [2024-02-20 11:55:15,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9177593] [2024-02-20 11:55:15,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:55:15,537 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-02-20 11:55:15,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:55:15,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-02-20 11:55:15,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2024-02-20 11:55:15,538 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:55:15,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1879 places, 2042 transitions, 470563 flow. Second operand has 34 states, 34 states have (on average 4.588235294117647) internal successors, (156), 34 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:55:15,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:55:15,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:55:15,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:55:32,202 INFO L124 PetriNetUnfolderBase]: 2191/4376 cut-off events. [2024-02-20 11:55:32,203 INFO L125 PetriNetUnfolderBase]: For 695/695 co-relation queries the response was YES. [2024-02-20 11:55:32,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504033 conditions, 4376 events. 2191/4376 cut-off events. For 695/695 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 33180 event pairs, 6 based on Foata normal form. 0/3442 useless extension candidates. Maximal degree in co-relation 353586. Up to 4338 conditions per place. [2024-02-20 11:55:32,394 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1364 selfloop transitions, 85 changer transitions 604/2054 dead transitions. [2024-02-20 11:55:32,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1907 places, 2054 transitions, 477423 flow [2024-02-20 11:55:32,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-02-20 11:55:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-02-20 11:55:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 228 transitions. [2024-02-20 11:55:32,395 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.33043478260869563 [2024-02-20 11:55:32,396 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1884 predicate places. [2024-02-20 11:55:32,396 INFO L507 AbstractCegarLoop]: Abstraction has has 1907 places, 2054 transitions, 477423 flow [2024-02-20 11:55:32,396 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.588235294117647) internal successors, (156), 34 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:55:32,396 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:55:32,396 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:55:32,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2024-02-20 11:55:32,608 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2024-02-20 11:55:32,608 INFO L432 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:55:32,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:55:32,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1012664295, now seen corresponding path program 107 times [2024-02-20 11:55:32,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:55:32,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716787577] [2024-02-20 11:55:32,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:55:32,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:55:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:55:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-20 11:55:33,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:55:33,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716787577] [2024-02-20 11:55:33,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716787577] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:55:33,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720173458] [2024-02-20 11:55:33,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:55:33,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:55:33,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:55:33,414 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:55:33,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2024-02-20 11:55:33,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 11:55:33,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:55:33,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 41 conjunts are in the unsatisfiable core [2024-02-20 11:55:33,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:55:34,098 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:55:34,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 45 [2024-02-20 11:55:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:55:34,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:55:34,331 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-20 11:55:34,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-02-20 11:55:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:55:34,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720173458] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:55:34,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:55:34,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 10] total 33 [2024-02-20 11:55:34,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783298863] [2024-02-20 11:55:34,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:55:34,405 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-02-20 11:55:34,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:55:34,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-02-20 11:55:34,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2024-02-20 11:55:34,405 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:55:34,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1907 places, 2054 transitions, 477423 flow. Second operand has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:55:34,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:55:34,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:55:34,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:55:52,340 INFO L124 PetriNetUnfolderBase]: 2299/4597 cut-off events. [2024-02-20 11:55:52,341 INFO L125 PetriNetUnfolderBase]: For 727/727 co-relation queries the response was YES. [2024-02-20 11:55:52,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533673 conditions, 4597 events. 2299/4597 cut-off events. For 727/727 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 35262 event pairs, 0 based on Foata normal form. 0/3621 useless extension candidates. Maximal degree in co-relation 373248. Up to 4554 conditions per place. [2024-02-20 11:55:52,670 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1440 selfloop transitions, 117 changer transitions 618/2176 dead transitions. [2024-02-20 11:55:52,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1952 places, 2176 transitions, 510152 flow [2024-02-20 11:55:52,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-02-20 11:55:52,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-02-20 11:55:52,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 388 transitions. [2024-02-20 11:55:52,671 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.35892691951896394 [2024-02-20 11:55:52,671 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1929 predicate places. [2024-02-20 11:55:52,672 INFO L507 AbstractCegarLoop]: Abstraction has has 1952 places, 2176 transitions, 510152 flow [2024-02-20 11:55:52,672 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:55:52,672 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:55:52,672 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:55:52,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2024-02-20 11:55:52,885 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2024-02-20 11:55:52,885 INFO L432 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:55:52,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:55:52,885 INFO L85 PathProgramCache]: Analyzing trace with hash 69551045, now seen corresponding path program 108 times [2024-02-20 11:55:52,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:55:52,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329331348] [2024-02-20 11:55:52,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:55:52,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:55:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:55:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:55:53,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:55:53,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329331348] [2024-02-20 11:55:53,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329331348] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:55:53,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988059435] [2024-02-20 11:55:53,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:55:53,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:55:53,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:55:53,330 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:55:53,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2024-02-20 11:55:53,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 11:55:53,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:55:53,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-20 11:55:53,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:55:53,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:55:53,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-02-20 11:55:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:55:53,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:55:53,972 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:55:53,973 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 71 treesize of output 88 [2024-02-20 11:55:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:55:54,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988059435] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:55:54,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:55:54,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2024-02-20 11:55:54,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083372319] [2024-02-20 11:55:54,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:55:54,033 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-20 11:55:54,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:55:54,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-20 11:55:54,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-02-20 11:55:54,033 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:55:54,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1952 places, 2176 transitions, 510152 flow. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:55:54,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:55:54,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:55:54,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:56:11,721 INFO L124 PetriNetUnfolderBase]: 2281/4552 cut-off events. [2024-02-20 11:56:11,722 INFO L125 PetriNetUnfolderBase]: For 721/721 co-relation queries the response was YES. [2024-02-20 11:56:11,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533265 conditions, 4552 events. 2281/4552 cut-off events. For 721/721 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 34760 event pairs, 8 based on Foata normal form. 0/3594 useless extension candidates. Maximal degree in co-relation 373606. Up to 4512 conditions per place. [2024-02-20 11:56:11,940 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 1483 selfloop transitions, 53 changer transitions 618/2155 dead transitions. [2024-02-20 11:56:11,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1967 places, 2155 transitions, 509528 flow [2024-02-20 11:56:11,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-20 11:56:11,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-20 11:56:11,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 158 transitions. [2024-02-20 11:56:11,941 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4040920716112532 [2024-02-20 11:56:11,941 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1944 predicate places. [2024-02-20 11:56:11,942 INFO L507 AbstractCegarLoop]: Abstraction has has 1967 places, 2155 transitions, 509528 flow [2024-02-20 11:56:11,942 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:56:11,942 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:56:11,942 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:56:11,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2024-02-20 11:56:12,155 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2024-02-20 11:56:12,155 INFO L432 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:56:12,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:56:12,155 INFO L85 PathProgramCache]: Analyzing trace with hash -758476220, now seen corresponding path program 109 times [2024-02-20 11:56:12,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:56:12,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008394294] [2024-02-20 11:56:12,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:56:12,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:56:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:56:13,371 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:56:13,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:56:13,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008394294] [2024-02-20 11:56:13,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008394294] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:56:13,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675604957] [2024-02-20 11:56:13,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:56:13,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:56:13,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:56:13,373 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:56:13,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2024-02-20 11:56:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:56:13,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 11:56:13,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:56:14,017 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-02-20 11:56:14,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 9 [2024-02-20 11:56:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:56:14,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:56:14,153 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-20 11:56:14,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-02-20 11:56:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:56:14,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675604957] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:56:14,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:56:14,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 34 [2024-02-20 11:56:14,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514659485] [2024-02-20 11:56:14,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:56:14,208 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-02-20 11:56:14,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:56:14,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-02-20 11:56:14,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2024-02-20 11:56:14,208 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:56:14,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1967 places, 2155 transitions, 509528 flow. Second operand has 34 states, 34 states have (on average 4.617647058823529) internal successors, (157), 34 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:56:14,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:56:14,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:56:14,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:56:33,583 INFO L124 PetriNetUnfolderBase]: 2317/4612 cut-off events. [2024-02-20 11:56:33,583 INFO L125 PetriNetUnfolderBase]: For 725/725 co-relation queries the response was YES. [2024-02-20 11:56:33,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544920 conditions, 4612 events. 2317/4612 cut-off events. For 725/725 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 35290 event pairs, 4 based on Foata normal form. 0/3642 useless extension candidates. Maximal degree in co-relation 383912. Up to 4572 conditions per place. [2024-02-20 11:56:33,799 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1495 selfloop transitions, 65 changer transitions 618/2179 dead transitions. [2024-02-20 11:56:33,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1997 places, 2179 transitions, 519548 flow [2024-02-20 11:56:33,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-02-20 11:56:33,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-02-20 11:56:33,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 203 transitions. [2024-02-20 11:56:33,800 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.2847124824684432 [2024-02-20 11:56:33,800 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1974 predicate places. [2024-02-20 11:56:33,800 INFO L507 AbstractCegarLoop]: Abstraction has has 1997 places, 2179 transitions, 519548 flow [2024-02-20 11:56:33,800 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.617647058823529) internal successors, (157), 34 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:56:33,800 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:56:33,801 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:56:33,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2024-02-20 11:56:34,005 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:56:34,006 INFO L432 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:56:34,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:56:34,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1304920354, now seen corresponding path program 110 times [2024-02-20 11:56:34,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:56:34,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106655775] [2024-02-20 11:56:34,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:56:34,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:56:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:56:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-20 11:56:34,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:56:34,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106655775] [2024-02-20 11:56:34,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106655775] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:56:34,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266235077] [2024-02-20 11:56:34,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:56:34,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:56:34,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:56:34,869 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:56:34,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2024-02-20 11:56:35,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:56:35,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:56:35,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 39 conjunts are in the unsatisfiable core [2024-02-20 11:56:35,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:56:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-02-20 11:56:35,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:56:35,679 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-20 11:56:35,679 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 73 treesize of output 94 [2024-02-20 11:56:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:56:35,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266235077] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:56:35,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:56:35,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 30 [2024-02-20 11:56:35,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771118589] [2024-02-20 11:56:35,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:56:35,744 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-02-20 11:56:35,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:56:35,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-02-20 11:56:35,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2024-02-20 11:56:35,745 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:56:35,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1997 places, 2179 transitions, 519548 flow. Second operand has 30 states, 30 states have (on average 4.9) internal successors, (147), 30 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:56:35,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:56:35,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:56:35,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:56:54,732 INFO L124 PetriNetUnfolderBase]: 2309/4604 cut-off events. [2024-02-20 11:56:54,733 INFO L125 PetriNetUnfolderBase]: For 707/707 co-relation queries the response was YES. [2024-02-20 11:56:54,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548535 conditions, 4604 events. 2309/4604 cut-off events. For 707/707 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 35181 event pairs, 0 based on Foata normal form. 0/3642 useless extension candidates. Maximal degree in co-relation 386658. Up to 4564 conditions per place. [2024-02-20 11:56:54,955 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1486 selfloop transitions, 54 changer transitions 644/2185 dead transitions. [2024-02-20 11:56:54,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2018 places, 2185 transitions, 525344 flow [2024-02-20 11:56:54,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-20 11:56:54,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-20 11:56:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 162 transitions. [2024-02-20 11:56:54,957 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3201581027667984 [2024-02-20 11:56:54,957 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 1995 predicate places. [2024-02-20 11:56:54,957 INFO L507 AbstractCegarLoop]: Abstraction has has 2018 places, 2185 transitions, 525344 flow [2024-02-20 11:56:54,957 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.9) internal successors, (147), 30 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:56:54,957 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:56:54,957 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:56:54,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2024-02-20 11:56:55,165 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:56:55,166 INFO L432 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:56:55,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:56:55,166 INFO L85 PathProgramCache]: Analyzing trace with hash -168935705, now seen corresponding path program 111 times [2024-02-20 11:56:55,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:56:55,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79517470] [2024-02-20 11:56:55,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:56:55,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:56:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:56:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-20 11:56:55,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:56:55,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79517470] [2024-02-20 11:56:55,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79517470] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:56:55,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013725216] [2024-02-20 11:56:55,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:56:55,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:56:55,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:56:55,971 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:56:55,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2024-02-20 11:56:56,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-20 11:56:56,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:56:56,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-20 11:56:56,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:56:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:56:56,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:56:56,630 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-20 11:56:56,630 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 73 treesize of output 94 [2024-02-20 11:56:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:56:56,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013725216] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:56:56,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:56:56,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 29 [2024-02-20 11:56:56,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198948340] [2024-02-20 11:56:56,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:56:56,701 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-20 11:56:56,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:56:56,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-20 11:56:56,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2024-02-20 11:56:56,701 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:56:56,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2018 places, 2185 transitions, 525344 flow. Second operand has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:56:56,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:56:56,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:56:56,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:57:16,670 INFO L124 PetriNetUnfolderBase]: 2303/4594 cut-off events. [2024-02-20 11:57:16,671 INFO L125 PetriNetUnfolderBase]: For 703/703 co-relation queries the response was YES. [2024-02-20 11:57:16,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 552132 conditions, 4594 events. 2303/4594 cut-off events. For 703/703 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 35145 event pairs, 2 based on Foata normal form. 0/3638 useless extension candidates. Maximal degree in co-relation 389154. Up to 4556 conditions per place. [2024-02-20 11:57:16,893 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1469 selfloop transitions, 56 changer transitions 665/2191 dead transitions. [2024-02-20 11:57:16,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2043 places, 2191 transitions, 531170 flow [2024-02-20 11:57:16,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-20 11:57:16,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-20 11:57:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 176 transitions. [2024-02-20 11:57:16,894 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.29431438127090304 [2024-02-20 11:57:16,894 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 2020 predicate places. [2024-02-20 11:57:16,894 INFO L507 AbstractCegarLoop]: Abstraction has has 2043 places, 2191 transitions, 531170 flow [2024-02-20 11:57:16,895 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:57:16,895 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:57:16,895 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:57:16,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2024-02-20 11:57:17,108 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:57:17,109 INFO L432 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:57:17,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:57:17,109 INFO L85 PathProgramCache]: Analyzing trace with hash 138923615, now seen corresponding path program 112 times [2024-02-20 11:57:17,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:57:17,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30363534] [2024-02-20 11:57:17,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:57:17,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:57:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:57:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:57:17,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:57:17,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30363534] [2024-02-20 11:57:17,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30363534] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:57:17,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095826634] [2024-02-20 11:57:17,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:57:17,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:57:17,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:57:17,709 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:57:17,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2024-02-20 11:57:18,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:57:18,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:57:18,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 23 conjunts are in the unsatisfiable core [2024-02-20 11:57:18,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:57:18,326 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:57:18,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 45 [2024-02-20 11:57:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:57:18,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:57:18,497 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-20 11:57:18,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-02-20 11:57:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:57:18,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095826634] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:57:18,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:57:18,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2024-02-20 11:57:18,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999505989] [2024-02-20 11:57:18,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:57:18,551 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-20 11:57:18,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:57:18,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-20 11:57:18,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2024-02-20 11:57:18,552 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:57:18,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2043 places, 2191 transitions, 531170 flow. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:57:18,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:57:18,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:57:18,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:57:38,777 INFO L124 PetriNetUnfolderBase]: 2295/4570 cut-off events. [2024-02-20 11:57:38,777 INFO L125 PetriNetUnfolderBase]: For 714/714 co-relation queries the response was YES. [2024-02-20 11:57:38,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 554002 conditions, 4570 events. 2295/4570 cut-off events. For 714/714 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 34906 event pairs, 4 based on Foata normal form. 0/3624 useless extension candidates. Maximal degree in co-relation 389930. Up to 4534 conditions per place. [2024-02-20 11:57:39,013 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1438 selfloop transitions, 71 changer transitions 672/2182 dead transitions. [2024-02-20 11:57:39,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2066 places, 2182 transitions, 533351 flow [2024-02-20 11:57:39,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-20 11:57:39,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-20 11:57:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 221 transitions. [2024-02-20 11:57:39,014 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3695652173913043 [2024-02-20 11:57:39,015 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 2043 predicate places. [2024-02-20 11:57:39,015 INFO L507 AbstractCegarLoop]: Abstraction has has 2066 places, 2182 transitions, 533351 flow [2024-02-20 11:57:39,015 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:57:39,015 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:57:39,015 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:57:39,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2024-02-20 11:57:39,227 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:57:39,228 INFO L432 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:57:39,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:57:39,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1115712287, now seen corresponding path program 113 times [2024-02-20 11:57:39,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:57:39,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831644065] [2024-02-20 11:57:39,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:57:39,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:57:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:57:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:57:40,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:57:40,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831644065] [2024-02-20 11:57:40,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831644065] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:57:40,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090417103] [2024-02-20 11:57:40,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:57:40,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:57:40,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:57:40,341 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:57:40,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2024-02-20 11:57:40,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 11:57:40,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:57:40,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 45 conjunts are in the unsatisfiable core [2024-02-20 11:57:40,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:57:40,904 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:57:40,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 34 [2024-02-20 11:57:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:57:40,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:57:41,177 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-02-20 11:57:41,177 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 44 treesize of output 77 [2024-02-20 11:57:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:57:41,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090417103] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:57:41,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:57:41,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 11] total 39 [2024-02-20 11:57:41,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183680720] [2024-02-20 11:57:41,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:57:41,273 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-02-20 11:57:41,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:57:41,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-02-20 11:57:41,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2024-02-20 11:57:41,274 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:57:41,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2066 places, 2182 transitions, 533351 flow. Second operand has 39 states, 39 states have (on average 4.769230769230769) internal successors, (186), 39 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:57:41,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:57:41,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:57:41,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:58:01,274 INFO L124 PetriNetUnfolderBase]: 2310/4606 cut-off events. [2024-02-20 11:58:01,275 INFO L125 PetriNetUnfolderBase]: For 725/725 co-relation queries the response was YES. [2024-02-20 11:58:01,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 562848 conditions, 4606 events. 2310/4606 cut-off events. For 725/725 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 35248 event pairs, 10 based on Foata normal form. 0/3658 useless extension candidates. Maximal degree in co-relation 396693. Up to 4569 conditions per place. [2024-02-20 11:58:01,500 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1436 selfloop transitions, 80 changer transitions 692/2209 dead transitions. [2024-02-20 11:58:01,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2093 places, 2209 transitions, 544370 flow [2024-02-20 11:58:01,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-20 11:58:01,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-20 11:58:01,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 218 transitions. [2024-02-20 11:58:01,515 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3385093167701863 [2024-02-20 11:58:01,516 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 2070 predicate places. [2024-02-20 11:58:01,516 INFO L507 AbstractCegarLoop]: Abstraction has has 2093 places, 2209 transitions, 544370 flow [2024-02-20 11:58:01,516 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.769230769230769) internal successors, (186), 39 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:58:01,516 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:58:01,516 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:58:01,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2024-02-20 11:58:01,729 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:58:01,729 INFO L432 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:58:01,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:58:01,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1429698347, now seen corresponding path program 114 times [2024-02-20 11:58:01,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:58:01,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719153602] [2024-02-20 11:58:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:58:01,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:58:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:58:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-02-20 11:58:02,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:58:02,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719153602] [2024-02-20 11:58:02,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719153602] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:58:02,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835824781] [2024-02-20 11:58:02,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:58:02,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:58:02,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:58:02,485 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:58:02,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2024-02-20 11:58:03,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 11:58:03,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:58:03,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-20 11:58:03,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:58:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:58:03,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:58:03,317 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-20 11:58:03,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-02-20 11:58:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:58:03,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835824781] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:58:03,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:58:03,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 27 [2024-02-20 11:58:03,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81359476] [2024-02-20 11:58:03,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:58:03,365 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-02-20 11:58:03,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:58:03,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-02-20 11:58:03,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2024-02-20 11:58:03,366 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:58:03,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2093 places, 2209 transitions, 544370 flow. Second operand has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:58:03,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:58:03,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:58:03,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:58:23,435 INFO L124 PetriNetUnfolderBase]: 2354/4674 cut-off events. [2024-02-20 11:58:23,436 INFO L125 PetriNetUnfolderBase]: For 720/720 co-relation queries the response was YES. [2024-02-20 11:58:23,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 576101 conditions, 4674 events. 2354/4674 cut-off events. For 720/720 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 35742 event pairs, 6 based on Foata normal form. 0/3724 useless extension candidates. Maximal degree in co-relation 406614. Up to 4639 conditions per place. [2024-02-20 11:58:23,820 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1476 selfloop transitions, 68 changer transitions 692/2237 dead transitions. [2024-02-20 11:58:23,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 2117 places, 2237 transitions, 555739 flow [2024-02-20 11:58:23,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-20 11:58:23,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-20 11:58:23,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 204 transitions. [2024-02-20 11:58:23,821 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3411371237458194 [2024-02-20 11:58:23,821 INFO L308 CegarLoopForPetriNet]: 23 programPoint places, 2094 predicate places. [2024-02-20 11:58:23,821 INFO L507 AbstractCegarLoop]: Abstraction has has 2117 places, 2237 transitions, 555739 flow [2024-02-20 11:58:23,822 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:58:23,822 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:58:23,822 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:58:23,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2024-02-20 11:58:24,034 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2024-02-20 11:58:24,035 INFO L432 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:58:24,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:58:24,035 INFO L85 PathProgramCache]: Analyzing trace with hash -937483166, now seen corresponding path program 115 times [2024-02-20 11:58:24,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:58:24,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42120326] [2024-02-20 11:58:24,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:58:24,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:58:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:58:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:58:24,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:58:24,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42120326] [2024-02-20 11:58:24,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42120326] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:58:24,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621215777] [2024-02-20 11:58:24,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:58:24,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:58:24,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:58:24,509 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:58:24,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2024-02-20 11:58:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:58:25,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 23 conjunts are in the unsatisfiable core [2024-02-20 11:58:25,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:58:25,127 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:58:25,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 45 [2024-02-20 11:58:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:58:25,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:58:25,288 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-02-20 11:58:25,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-02-20 11:58:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-20 11:58:25,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621215777] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:58:25,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:58:25,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2024-02-20 11:58:25,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945087215] [2024-02-20 11:58:25,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:58:25,328 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-20 11:58:25,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:58:25,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-20 11:58:25,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-02-20 11:58:25,329 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-02-20 11:58:25,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2117 places, 2237 transitions, 555739 flow. Second operand has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:58:25,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:58:25,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-02-20 11:58:25,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15