./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:57:58,685 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:57:58,766 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:57:58,771 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:57:58,771 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:57:58,796 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:57:58,796 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:57:58,797 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:57:58,797 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:57:58,800 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:57:58,800 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:57:58,800 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:57:58,801 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:57:58,802 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:57:58,802 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:57:58,802 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:57:58,803 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:57:58,803 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:57:58,803 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:57:58,803 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:57:58,803 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:57:58,804 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:57:58,804 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:57:58,804 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:57:58,804 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:57:58,804 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:57:58,804 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:57:58,804 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:57:58,805 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:57:58,805 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:57:58,806 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:57:58,806 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:57:58,806 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:57:58,806 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:57:58,806 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:57:58,806 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:57:58,806 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:57:58,807 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:57:58,807 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:57:58,807 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:57:58,807 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:57:58,807 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:57:58,807 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:57:58,807 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 [2024-01-27 15:57:59,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:57:59,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:57:59,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:57:59,026 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:57:59,027 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:57:59,028 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c [2024-01-27 15:58:00,186 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:58:00,323 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:58:00,324 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c [2024-01-27 15:58:00,331 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebe8aee96/af86fbca1439488787ee2c97a5c9e385/FLAGc68de15c5 [2024-01-27 15:58:00,344 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebe8aee96/af86fbca1439488787ee2c97a5c9e385 [2024-01-27 15:58:00,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:58:00,348 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:58:00,349 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:58:00,349 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:58:00,355 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:58:00,356 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:58:00" (1/1) ... [2024-01-27 15:58:00,357 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d9401d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:00, skipping insertion in model container [2024-01-27 15:58:00,357 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:58:00" (1/1) ... [2024-01-27 15:58:00,385 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:58:00,544 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/unroll-cond-3.wvr.c[2667,2680] [2024-01-27 15:58:00,555 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:58:00,563 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:58:00,580 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/unroll-cond-3.wvr.c[2667,2680] [2024-01-27 15:58:00,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:58:00,600 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:58:00,602 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:00 WrapperNode [2024-01-27 15:58:00,602 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:58:00,603 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:58:00,603 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:58:00,603 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:58:00,608 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:00" (1/1) ... [2024-01-27 15:58:00,622 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:00" (1/1) ... [2024-01-27 15:58:00,648 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 167 [2024-01-27 15:58:00,649 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:58:00,650 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:58:00,650 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:58:00,650 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:58:00,658 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:00" (1/1) ... [2024-01-27 15:58:00,658 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:00" (1/1) ... [2024-01-27 15:58:00,670 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:00" (1/1) ... [2024-01-27 15:58:00,689 INFO L175 MemorySlicer]: Split 13 memory accesses to 4 slices as follows [2, 2, 2, 7]. 54 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-01-27 15:58:00,690 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:00" (1/1) ... [2024-01-27 15:58:00,690 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:00" (1/1) ... [2024-01-27 15:58:00,705 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:00" (1/1) ... [2024-01-27 15:58:00,708 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:00" (1/1) ... [2024-01-27 15:58:00,709 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:00" (1/1) ... [2024-01-27 15:58:00,712 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:00" (1/1) ... [2024-01-27 15:58:00,714 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:58:00,717 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:58:00,718 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:58:00,718 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:58:00,719 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:00" (1/1) ... [2024-01-27 15:58:00,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:58:00,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:00,758 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 15:58:00,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 15:58:00,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:58:00,810 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:58:00,810 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:58:00,810 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:58:00,810 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:58:00,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:58:00,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:58:00,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:58:00,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:58:00,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:58:00,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:58:00,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:58:00,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:58:00,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:58:00,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:58:00,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:58:00,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:58:00,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:58:00,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:58:00,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:58:00,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:58:00,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:58:00,815 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:58:00,924 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:58:00,926 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:58:01,278 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:58:01,278 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:58:01,478 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:58:01,478 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:58:01,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:58:01 BoogieIcfgContainer [2024-01-27 15:58:01,479 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:58:01,480 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:58:01,480 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:58:01,483 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:58:01,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:58:00" (1/3) ... [2024-01-27 15:58:01,483 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b61c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:58:01, skipping insertion in model container [2024-01-27 15:58:01,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:00" (2/3) ... [2024-01-27 15:58:01,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b61c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:58:01, skipping insertion in model container [2024-01-27 15:58:01,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:58:01" (3/3) ... [2024-01-27 15:58:01,485 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2024-01-27 15:58:01,490 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:58:01,497 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:58:01,497 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:58:01,498 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:58:01,530 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:58:01,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2024-01-27 15:58:01,570 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2024-01-27 15:58:01,570 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:58:01,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-01-27 15:58:01,572 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2024-01-27 15:58:01,574 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2024-01-27 15:58:01,581 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:58:01,586 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4bbd0b79, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:58:01,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:58:01,593 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:58:01,593 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2024-01-27 15:58:01,594 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:58:01,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:01,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:01,595 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:01,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:01,599 INFO L85 PathProgramCache]: Analyzing trace with hash -953264648, now seen corresponding path program 1 times [2024-01-27 15:58:01,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:01,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837475370] [2024-01-27 15:58:01,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:01,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:01,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:01,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:01,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837475370] [2024-01-27 15:58:01,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837475370] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:58:01,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:58:01,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:58:01,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381587119] [2024-01-27 15:58:01,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:58:01,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:58:01,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:01,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:58:01,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:58:01,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:01,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:01,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:01,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:01,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:02,028 INFO L124 PetriNetUnfolderBase]: 41/77 cut-off events. [2024-01-27 15:58:02,028 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-01-27 15:58:02,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 77 events. 41/77 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 132 event pairs, 24 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2024-01-27 15:58:02,032 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 16 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2024-01-27 15:58:02,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 19 transitions, 86 flow [2024-01-27 15:58:02,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:58:02,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:58:02,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 28 transitions. [2024-01-27 15:58:02,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-01-27 15:58:02,043 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 3 states and 28 transitions. [2024-01-27 15:58:02,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 19 transitions, 86 flow [2024-01-27 15:58:02,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 19 transitions, 78 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:58:02,047 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 52 flow [2024-01-27 15:58:02,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2024-01-27 15:58:02,051 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2024-01-27 15:58:02,052 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 52 flow [2024-01-27 15:58:02,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:02,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:02,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:02,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:58:02,054 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:02,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:02,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1689825126, now seen corresponding path program 1 times [2024-01-27 15:58:02,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:02,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211613553] [2024-01-27 15:58:02,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:02,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:02,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:02,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211613553] [2024-01-27 15:58:02,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211613553] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:58:02,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:58:02,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:58:02,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524913294] [2024-01-27 15:58:02,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:58:02,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:58:02,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:02,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:58:02,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:58:02,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:02,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 52 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:02,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:02,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:02,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:02,630 INFO L124 PetriNetUnfolderBase]: 75/133 cut-off events. [2024-01-27 15:58:02,630 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:58:02,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 133 events. 75/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 342 event pairs, 1 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 269. Up to 89 conditions per place. [2024-01-27 15:58:02,632 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 33 selfloop transitions, 12 changer transitions 0/46 dead transitions. [2024-01-27 15:58:02,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 46 transitions, 201 flow [2024-01-27 15:58:02,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:58:02,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:58:02,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2024-01-27 15:58:02,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-01-27 15:58:02,633 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 52 flow. Second operand 6 states and 63 transitions. [2024-01-27 15:58:02,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 46 transitions, 201 flow [2024-01-27 15:58:02,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 46 transitions, 197 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 15:58:02,635 INFO L231 Difference]: Finished difference. Result has 28 places, 30 transitions, 119 flow [2024-01-27 15:58:02,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=119, PETRI_PLACES=28, PETRI_TRANSITIONS=30} [2024-01-27 15:58:02,636 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 6 predicate places. [2024-01-27 15:58:02,636 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 30 transitions, 119 flow [2024-01-27 15:58:02,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:02,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:02,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:02,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:58:02,637 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:02,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:02,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1465931414, now seen corresponding path program 2 times [2024-01-27 15:58:02,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:02,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326471241] [2024-01-27 15:58:02,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:02,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:02,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:02,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326471241] [2024-01-27 15:58:02,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326471241] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:58:02,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:58:02,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:58:02,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041003269] [2024-01-27 15:58:02,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:58:02,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:58:02,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:02,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:58:02,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:58:02,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:02,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 30 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:02,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:02,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:02,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:03,063 INFO L124 PetriNetUnfolderBase]: 85/149 cut-off events. [2024-01-27 15:58:03,063 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-01-27 15:58:03,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 149 events. 85/149 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 377 event pairs, 10 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 445. Up to 99 conditions per place. [2024-01-27 15:58:03,065 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 32 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2024-01-27 15:58:03,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 51 transitions, 294 flow [2024-01-27 15:58:03,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:58:03,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:58:03,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2024-01-27 15:58:03,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-01-27 15:58:03,068 INFO L175 Difference]: Start difference. First operand has 28 places, 30 transitions, 119 flow. Second operand 6 states and 62 transitions. [2024-01-27 15:58:03,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 51 transitions, 294 flow [2024-01-27 15:58:03,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 51 transitions, 286 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-01-27 15:58:03,073 INFO L231 Difference]: Finished difference. Result has 36 places, 38 transitions, 214 flow [2024-01-27 15:58:03,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=36, PETRI_TRANSITIONS=38} [2024-01-27 15:58:03,074 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2024-01-27 15:58:03,074 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 38 transitions, 214 flow [2024-01-27 15:58:03,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:03,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:03,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:03,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:58:03,075 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:03,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:03,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1638502336, now seen corresponding path program 3 times [2024-01-27 15:58:03,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:03,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076991868] [2024-01-27 15:58:03,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:03,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:03,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:03,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076991868] [2024-01-27 15:58:03,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076991868] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:58:03,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:58:03,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:58:03,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267616788] [2024-01-27 15:58:03,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:58:03,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:58:03,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:03,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:58:03,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:58:03,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:03,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 38 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:03,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:03,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:03,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:03,366 INFO L124 PetriNetUnfolderBase]: 86/164 cut-off events. [2024-01-27 15:58:03,366 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2024-01-27 15:58:03,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 164 events. 86/164 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 465 event pairs, 1 based on Foata normal form. 1/136 useless extension candidates. Maximal degree in co-relation 574. Up to 95 conditions per place. [2024-01-27 15:58:03,368 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 37 selfloop transitions, 19 changer transitions 2/59 dead transitions. [2024-01-27 15:58:03,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 59 transitions, 395 flow [2024-01-27 15:58:03,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:58:03,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:58:03,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 68 transitions. [2024-01-27 15:58:03,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-01-27 15:58:03,369 INFO L175 Difference]: Start difference. First operand has 36 places, 38 transitions, 214 flow. Second operand 6 states and 68 transitions. [2024-01-27 15:58:03,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 59 transitions, 395 flow [2024-01-27 15:58:03,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 59 transitions, 371 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-01-27 15:58:03,372 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 260 flow [2024-01-27 15:58:03,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-01-27 15:58:03,373 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2024-01-27 15:58:03,373 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 260 flow [2024-01-27 15:58:03,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:03,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:03,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:03,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:58:03,374 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:03,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:03,375 INFO L85 PathProgramCache]: Analyzing trace with hash -773427632, now seen corresponding path program 4 times [2024-01-27 15:58:03,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:03,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433804538] [2024-01-27 15:58:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:03,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:03,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:03,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:03,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433804538] [2024-01-27 15:58:03,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433804538] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:58:03,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:58:03,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:58:03,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106407538] [2024-01-27 15:58:03,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:58:03,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:58:03,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:03,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:58:03,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:58:03,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:03,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 260 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:03,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:03,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:03,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:03,633 INFO L124 PetriNetUnfolderBase]: 82/148 cut-off events. [2024-01-27 15:58:03,634 INFO L125 PetriNetUnfolderBase]: For 221/221 co-relation queries the response was YES. [2024-01-27 15:58:03,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 148 events. 82/148 cut-off events. For 221/221 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 393 event pairs, 5 based on Foata normal form. 4/131 useless extension candidates. Maximal degree in co-relation 566. Up to 98 conditions per place. [2024-01-27 15:58:03,635 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 35 selfloop transitions, 18 changer transitions 0/54 dead transitions. [2024-01-27 15:58:03,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 397 flow [2024-01-27 15:58:03,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:58:03,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:58:03,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-01-27 15:58:03,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-01-27 15:58:03,637 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 260 flow. Second operand 6 states and 64 transitions. [2024-01-27 15:58:03,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 397 flow [2024-01-27 15:58:03,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 373 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-01-27 15:58:03,640 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 279 flow [2024-01-27 15:58:03,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2024-01-27 15:58:03,640 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 24 predicate places. [2024-01-27 15:58:03,641 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 279 flow [2024-01-27 15:58:03,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:03,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:03,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:03,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:58:03,641 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:03,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:03,642 INFO L85 PathProgramCache]: Analyzing trace with hash -390829614, now seen corresponding path program 5 times [2024-01-27 15:58:03,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:03,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479930483] [2024-01-27 15:58:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:03,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:03,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:03,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479930483] [2024-01-27 15:58:03,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479930483] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:58:03,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:58:03,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:58:03,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236648794] [2024-01-27 15:58:03,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:58:03,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:58:03,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:03,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:58:03,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:58:03,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:03,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 279 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:03,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:03,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:03,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:03,866 INFO L124 PetriNetUnfolderBase]: 84/157 cut-off events. [2024-01-27 15:58:03,867 INFO L125 PetriNetUnfolderBase]: For 249/249 co-relation queries the response was YES. [2024-01-27 15:58:03,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 157 events. 84/157 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 436 event pairs, 4 based on Foata normal form. 1/135 useless extension candidates. Maximal degree in co-relation 617. Up to 95 conditions per place. [2024-01-27 15:58:03,869 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 33 selfloop transitions, 20 changer transitions 2/56 dead transitions. [2024-01-27 15:58:03,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 434 flow [2024-01-27 15:58:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:58:03,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:58:03,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 67 transitions. [2024-01-27 15:58:03,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-01-27 15:58:03,870 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 279 flow. Second operand 7 states and 67 transitions. [2024-01-27 15:58:03,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 434 flow [2024-01-27 15:58:03,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 56 transitions, 398 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-01-27 15:58:03,874 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 303 flow [2024-01-27 15:58:03,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=303, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2024-01-27 15:58:03,878 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 28 predicate places. [2024-01-27 15:58:03,878 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 303 flow [2024-01-27 15:58:03,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:03,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:03,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:03,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:58:03,879 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:03,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:03,879 INFO L85 PathProgramCache]: Analyzing trace with hash -409263640, now seen corresponding path program 6 times [2024-01-27 15:58:03,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:03,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127771927] [2024-01-27 15:58:03,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:03,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:04,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:04,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127771927] [2024-01-27 15:58:04,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127771927] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:58:04,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:58:04,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:58:04,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491340506] [2024-01-27 15:58:04,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:58:04,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:58:04,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:04,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:58:04,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:58:04,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:04,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 303 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:04,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:04,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:04,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:04,173 INFO L124 PetriNetUnfolderBase]: 102/194 cut-off events. [2024-01-27 15:58:04,173 INFO L125 PetriNetUnfolderBase]: For 313/313 co-relation queries the response was YES. [2024-01-27 15:58:04,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 194 events. 102/194 cut-off events. For 313/313 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 598 event pairs, 4 based on Foata normal form. 1/162 useless extension candidates. Maximal degree in co-relation 772. Up to 67 conditions per place. [2024-01-27 15:58:04,175 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 39 selfloop transitions, 25 changer transitions 2/67 dead transitions. [2024-01-27 15:58:04,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 67 transitions, 526 flow [2024-01-27 15:58:04,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:58:04,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:58:04,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2024-01-27 15:58:04,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-01-27 15:58:04,176 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 303 flow. Second operand 8 states and 80 transitions. [2024-01-27 15:58:04,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 67 transitions, 526 flow [2024-01-27 15:58:04,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 67 transitions, 421 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-01-27 15:58:04,179 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 315 flow [2024-01-27 15:58:04,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=315, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-01-27 15:58:04,180 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 29 predicate places. [2024-01-27 15:58:04,180 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 315 flow [2024-01-27 15:58:04,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:04,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:04,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:04,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:58:04,181 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:04,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:04,181 INFO L85 PathProgramCache]: Analyzing trace with hash -494842561, now seen corresponding path program 1 times [2024-01-27 15:58:04,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:04,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143618541] [2024-01-27 15:58:04,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:04,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:04,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:04,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143618541] [2024-01-27 15:58:04,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143618541] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:04,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528284648] [2024-01-27 15:58:04,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:04,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:04,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:04,353 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:04,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:58:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:04,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-27 15:58:04,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:04,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:58:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:04,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:05,211 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:58:05,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 59 [2024-01-27 15:58:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:05,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528284648] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:05,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:05,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2024-01-27 15:58:05,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642834851] [2024-01-27 15:58:05,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:05,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:58:05,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:05,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:58:05,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:58:05,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:05,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 315 flow. Second operand has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:05,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:05,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:05,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:06,911 INFO L124 PetriNetUnfolderBase]: 221/418 cut-off events. [2024-01-27 15:58:06,912 INFO L125 PetriNetUnfolderBase]: For 493/493 co-relation queries the response was YES. [2024-01-27 15:58:06,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1653 conditions, 418 events. 221/418 cut-off events. For 493/493 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1699 event pairs, 5 based on Foata normal form. 1/368 useless extension candidates. Maximal degree in co-relation 1624. Up to 137 conditions per place. [2024-01-27 15:58:06,915 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 86 selfloop transitions, 42 changer transitions 4/133 dead transitions. [2024-01-27 15:58:06,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 133 transitions, 975 flow [2024-01-27 15:58:06,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:58:06,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:58:06,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 158 transitions. [2024-01-27 15:58:06,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-01-27 15:58:06,917 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 315 flow. Second operand 16 states and 158 transitions. [2024-01-27 15:58:06,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 133 transitions, 975 flow [2024-01-27 15:58:06,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 133 transitions, 902 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-01-27 15:58:06,923 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 578 flow [2024-01-27 15:58:06,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=578, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-01-27 15:58:06,923 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 47 predicate places. [2024-01-27 15:58:06,924 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 578 flow [2024-01-27 15:58:06,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:06,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:06,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:06,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:58:07,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:07,138 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:07,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:07,138 INFO L85 PathProgramCache]: Analyzing trace with hash 365826473, now seen corresponding path program 2 times [2024-01-27 15:58:07,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:07,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900278275] [2024-01-27 15:58:07,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:07,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:07,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:07,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900278275] [2024-01-27 15:58:07,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900278275] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:07,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737322436] [2024-01-27 15:58:07,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:58:07,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:07,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:07,285 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:07,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 15:58:07,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:58:07,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:07,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-27 15:58:07,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:07,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:58:07,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:58:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:07,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:08,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-01-27 15:58:08,280 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:58:08,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-01-27 15:58:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:08,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737322436] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:08,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:08,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-01-27 15:58:08,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275044943] [2024-01-27 15:58:08,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:08,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:58:08,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:08,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:58:08,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:58:08,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:08,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 578 flow. Second operand has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:08,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:08,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:08,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:10,102 INFO L124 PetriNetUnfolderBase]: 258/515 cut-off events. [2024-01-27 15:58:10,102 INFO L125 PetriNetUnfolderBase]: For 1367/1367 co-relation queries the response was YES. [2024-01-27 15:58:10,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2408 conditions, 515 events. 258/515 cut-off events. For 1367/1367 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2364 event pairs, 7 based on Foata normal form. 5/488 useless extension candidates. Maximal degree in co-relation 2370. Up to 148 conditions per place. [2024-01-27 15:58:10,106 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 101 selfloop transitions, 58 changer transitions 13/173 dead transitions. [2024-01-27 15:58:10,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 173 transitions, 1422 flow [2024-01-27 15:58:10,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:58:10,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:58:10,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 211 transitions. [2024-01-27 15:58:10,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45670995670995673 [2024-01-27 15:58:10,108 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 578 flow. Second operand 22 states and 211 transitions. [2024-01-27 15:58:10,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 173 transitions, 1422 flow [2024-01-27 15:58:10,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 173 transitions, 1311 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-01-27 15:58:10,118 INFO L231 Difference]: Finished difference. Result has 93 places, 86 transitions, 805 flow [2024-01-27 15:58:10,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=805, PETRI_PLACES=93, PETRI_TRANSITIONS=86} [2024-01-27 15:58:10,119 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 71 predicate places. [2024-01-27 15:58:10,119 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 86 transitions, 805 flow [2024-01-27 15:58:10,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:10,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:10,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:10,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:58:10,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-01-27 15:58:10,332 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:10,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:10,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1491045383, now seen corresponding path program 3 times [2024-01-27 15:58:10,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:10,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617542896] [2024-01-27 15:58:10,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:10,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:10,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:10,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:10,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617542896] [2024-01-27 15:58:10,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617542896] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:10,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954507526] [2024-01-27 15:58:10,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:58:10,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:10,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:10,459 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:10,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 15:58:10,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:58:10,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:10,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-27 15:58:10,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:10,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:58:10,719 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:58:10,720 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 115 treesize of output 104 [2024-01-27 15:58:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:10,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:11,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-01-27 15:58:11,284 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:58:11,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-01-27 15:58:11,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-01-27 15:58:11,333 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2024-01-27 15:58:11,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 164 [2024-01-27 15:58:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:11,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954507526] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:11,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:11,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-01-27 15:58:11,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522514795] [2024-01-27 15:58:11,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:11,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:58:11,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:11,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:58:11,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:58:11,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:11,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 86 transitions, 805 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:11,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:11,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:11,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:14,099 INFO L124 PetriNetUnfolderBase]: 529/1047 cut-off events. [2024-01-27 15:58:14,099 INFO L125 PetriNetUnfolderBase]: For 4196/4196 co-relation queries the response was YES. [2024-01-27 15:58:14,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5275 conditions, 1047 events. 529/1047 cut-off events. For 4196/4196 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5682 event pairs, 20 based on Foata normal form. 10/1005 useless extension candidates. Maximal degree in co-relation 5030. Up to 281 conditions per place. [2024-01-27 15:58:14,106 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 121 selfloop transitions, 79 changer transitions 84/285 dead transitions. [2024-01-27 15:58:14,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 285 transitions, 2716 flow [2024-01-27 15:58:14,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-27 15:58:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-27 15:58:14,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 293 transitions. [2024-01-27 15:58:14,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48111658456486045 [2024-01-27 15:58:14,108 INFO L175 Difference]: Start difference. First operand has 93 places, 86 transitions, 805 flow. Second operand 29 states and 293 transitions. [2024-01-27 15:58:14,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 285 transitions, 2716 flow [2024-01-27 15:58:14,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 285 transitions, 2534 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-01-27 15:58:14,127 INFO L231 Difference]: Finished difference. Result has 121 places, 111 transitions, 1162 flow [2024-01-27 15:58:14,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1162, PETRI_PLACES=121, PETRI_TRANSITIONS=111} [2024-01-27 15:58:14,128 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 99 predicate places. [2024-01-27 15:58:14,129 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 111 transitions, 1162 flow [2024-01-27 15:58:14,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:14,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:14,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:14,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:58:14,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:14,341 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:14,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:14,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1849869089, now seen corresponding path program 4 times [2024-01-27 15:58:14,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:14,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890934207] [2024-01-27 15:58:14,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:14,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:14,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:14,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890934207] [2024-01-27 15:58:14,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890934207] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:14,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877194698] [2024-01-27 15:58:14,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:58:14,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:14,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:14,488 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:14,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 15:58:14,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:58:14,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:14,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-27 15:58:14,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:14,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:58:14,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:58:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:14,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:15,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-01-27 15:58:15,758 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:58:15,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-01-27 15:58:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:15,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877194698] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:15,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:15,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-01-27 15:58:15,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335549357] [2024-01-27 15:58:15,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:15,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:58:15,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:15,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:58:15,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:58:15,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:15,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 111 transitions, 1162 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) [2024-01-27 15:58:15,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:15,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:15,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:18,240 INFO L124 PetriNetUnfolderBase]: 369/825 cut-off events. [2024-01-27 15:58:18,240 INFO L125 PetriNetUnfolderBase]: For 3813/3813 co-relation queries the response was YES. [2024-01-27 15:58:18,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4290 conditions, 825 events. 369/825 cut-off events. For 3813/3813 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4639 event pairs, 26 based on Foata normal form. 9/794 useless extension candidates. Maximal degree in co-relation 4075. Up to 450 conditions per place. [2024-01-27 15:58:18,245 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 100 selfloop transitions, 76 changer transitions 5/182 dead transitions. [2024-01-27 15:58:18,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 182 transitions, 1984 flow [2024-01-27 15:58:18,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 15:58:18,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 15:58:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 165 transitions. [2024-01-27 15:58:18,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-01-27 15:58:18,247 INFO L175 Difference]: Start difference. First operand has 121 places, 111 transitions, 1162 flow. Second operand 18 states and 165 transitions. [2024-01-27 15:58:18,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 182 transitions, 1984 flow [2024-01-27 15:58:18,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 182 transitions, 1888 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-01-27 15:58:18,263 INFO L231 Difference]: Finished difference. Result has 129 places, 128 transitions, 1500 flow [2024-01-27 15:58:18,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1500, PETRI_PLACES=129, PETRI_TRANSITIONS=128} [2024-01-27 15:58:18,264 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 107 predicate places. [2024-01-27 15:58:18,264 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 128 transitions, 1500 flow [2024-01-27 15:58:18,265 INFO L496 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) [2024-01-27 15:58:18,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:18,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:18,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 15:58:18,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:18,476 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:18,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:18,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1640387, now seen corresponding path program 5 times [2024-01-27 15:58:18,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:18,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710533970] [2024-01-27 15:58:18,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:18,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:18,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:18,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710533970] [2024-01-27 15:58:18,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710533970] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:18,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858817090] [2024-01-27 15:58:18,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:58:18,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:18,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:18,661 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:18,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 15:58:18,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:58:18,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:18,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-27 15:58:18,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:18,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:58:18,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 93 [2024-01-27 15:58:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:19,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:19,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-01-27 15:58:19,826 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:58:19,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-01-27 15:58:19,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-01-27 15:58:19,870 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2024-01-27 15:58:19,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 239 treesize of output 193 [2024-01-27 15:58:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:20,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858817090] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:20,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:20,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-01-27 15:58:20,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900576672] [2024-01-27 15:58:20,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:20,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:58:20,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:20,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:58:20,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:58:20,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:20,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 128 transitions, 1500 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:20,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:20,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:20,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:24,915 INFO L124 PetriNetUnfolderBase]: 392/877 cut-off events. [2024-01-27 15:58:24,915 INFO L125 PetriNetUnfolderBase]: For 4523/4523 co-relation queries the response was YES. [2024-01-27 15:58:24,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4769 conditions, 877 events. 392/877 cut-off events. For 4523/4523 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5111 event pairs, 27 based on Foata normal form. 9/846 useless extension candidates. Maximal degree in co-relation 4545. Up to 356 conditions per place. [2024-01-27 15:58:24,922 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 142 selfloop transitions, 82 changer transitions 28/253 dead transitions. [2024-01-27 15:58:24,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 253 transitions, 2725 flow [2024-01-27 15:58:24,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-27 15:58:24,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-27 15:58:24,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 283 transitions. [2024-01-27 15:58:24,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434715821812596 [2024-01-27 15:58:24,924 INFO L175 Difference]: Start difference. First operand has 129 places, 128 transitions, 1500 flow. Second operand 31 states and 283 transitions. [2024-01-27 15:58:24,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 253 transitions, 2725 flow [2024-01-27 15:58:24,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 253 transitions, 2549 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-01-27 15:58:24,949 INFO L231 Difference]: Finished difference. Result has 156 places, 135 transitions, 1652 flow [2024-01-27 15:58:24,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1652, PETRI_PLACES=156, PETRI_TRANSITIONS=135} [2024-01-27 15:58:24,949 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 134 predicate places. [2024-01-27 15:58:24,950 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 135 transitions, 1652 flow [2024-01-27 15:58:24,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:24,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:24,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:24,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-27 15:58:25,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-01-27 15:58:25,164 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:25,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:25,164 INFO L85 PathProgramCache]: Analyzing trace with hash -2040408399, now seen corresponding path program 6 times [2024-01-27 15:58:25,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:25,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145270420] [2024-01-27 15:58:25,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:25,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:25,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:25,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145270420] [2024-01-27 15:58:25,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145270420] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:25,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170751266] [2024-01-27 15:58:25,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:58:25,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:25,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:25,286 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:25,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 15:58:25,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:58:25,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:25,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:58:25,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:25,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:25,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170751266] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:25,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:25,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-27 15:58:25,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629765752] [2024-01-27 15:58:25,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:25,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:58:25,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:25,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:58:25,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:58:25,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:25,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 135 transitions, 1652 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:25,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:25,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:25,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:25,885 INFO L124 PetriNetUnfolderBase]: 559/1156 cut-off events. [2024-01-27 15:58:25,885 INFO L125 PetriNetUnfolderBase]: For 7491/7491 co-relation queries the response was YES. [2024-01-27 15:58:25,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6521 conditions, 1156 events. 559/1156 cut-off events. For 7491/7491 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 6711 event pairs, 92 based on Foata normal form. 36/1186 useless extension candidates. Maximal degree in co-relation 6219. Up to 526 conditions per place. [2024-01-27 15:58:25,897 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 109 selfloop transitions, 93 changer transitions 1/204 dead transitions. [2024-01-27 15:58:25,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 204 transitions, 2669 flow [2024-01-27 15:58:25,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:58:25,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:58:25,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 112 transitions. [2024-01-27 15:58:25,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-01-27 15:58:25,900 INFO L175 Difference]: Start difference. First operand has 156 places, 135 transitions, 1652 flow. Second operand 12 states and 112 transitions. [2024-01-27 15:58:25,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 204 transitions, 2669 flow [2024-01-27 15:58:25,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 204 transitions, 2537 flow, removed 5 selfloop flow, removed 15 redundant places. [2024-01-27 15:58:25,939 INFO L231 Difference]: Finished difference. Result has 158 places, 165 transitions, 2201 flow [2024-01-27 15:58:25,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1508, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2201, PETRI_PLACES=158, PETRI_TRANSITIONS=165} [2024-01-27 15:58:25,941 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 136 predicate places. [2024-01-27 15:58:25,941 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 165 transitions, 2201 flow [2024-01-27 15:58:25,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:25,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:25,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:25,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 15:58:26,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:26,156 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:26,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:26,157 INFO L85 PathProgramCache]: Analyzing trace with hash -908980295, now seen corresponding path program 7 times [2024-01-27 15:58:26,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:26,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97258913] [2024-01-27 15:58:26,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:26,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:26,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:26,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:26,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97258913] [2024-01-27 15:58:26,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97258913] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:26,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489142084] [2024-01-27 15:58:26,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:58:26,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:26,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:26,303 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:26,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:58:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:26,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-27 15:58:26,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:26,660 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:58:26,661 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 39 [2024-01-27 15:58:26,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:26,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:26,838 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:58:26,838 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 75 treesize of output 67 [2024-01-27 15:58:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:26,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489142084] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:26,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:26,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2024-01-27 15:58:26,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824042133] [2024-01-27 15:58:26,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:26,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:58:26,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:26,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:58:26,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:58:26,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:26,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 165 transitions, 2201 flow. Second operand has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:26,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:26,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:26,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:27,754 INFO L124 PetriNetUnfolderBase]: 599/1304 cut-off events. [2024-01-27 15:58:27,754 INFO L125 PetriNetUnfolderBase]: For 9501/9501 co-relation queries the response was YES. [2024-01-27 15:58:27,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7818 conditions, 1304 events. 599/1304 cut-off events. For 9501/9501 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8211 event pairs, 6 based on Foata normal form. 7/1305 useless extension candidates. Maximal degree in co-relation 7539. Up to 538 conditions per place. [2024-01-27 15:58:27,764 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 121 selfloop transitions, 110 changer transitions 10/242 dead transitions. [2024-01-27 15:58:27,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 242 transitions, 3359 flow [2024-01-27 15:58:27,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:58:27,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:58:27,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 141 transitions. [2024-01-27 15:58:27,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3949579831932773 [2024-01-27 15:58:27,765 INFO L175 Difference]: Start difference. First operand has 158 places, 165 transitions, 2201 flow. Second operand 17 states and 141 transitions. [2024-01-27 15:58:27,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 242 transitions, 3359 flow [2024-01-27 15:58:27,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 242 transitions, 3166 flow, removed 80 selfloop flow, removed 4 redundant places. [2024-01-27 15:58:27,816 INFO L231 Difference]: Finished difference. Result has 175 places, 191 transitions, 2727 flow [2024-01-27 15:58:27,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2048, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2727, PETRI_PLACES=175, PETRI_TRANSITIONS=191} [2024-01-27 15:58:27,816 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 153 predicate places. [2024-01-27 15:58:27,817 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 191 transitions, 2727 flow [2024-01-27 15:58:27,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:27,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:27,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:27,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-01-27 15:58:28,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:28,028 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:28,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:28,029 INFO L85 PathProgramCache]: Analyzing trace with hash 536215191, now seen corresponding path program 8 times [2024-01-27 15:58:28,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:28,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726042469] [2024-01-27 15:58:28,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:28,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:28,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:28,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726042469] [2024-01-27 15:58:28,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726042469] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:28,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760933155] [2024-01-27 15:58:28,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:58:28,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:28,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:28,169 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:28,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 15:58:28,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:58:28,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:28,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-27 15:58:28,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:28,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:58:28,454 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:58:28,455 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 115 treesize of output 109 [2024-01-27 15:58:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:28,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:29,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-01-27 15:58:29,297 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:58:29,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-01-27 15:58:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:29,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760933155] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:29,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:29,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-01-27 15:58:29,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931713791] [2024-01-27 15:58:29,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:29,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:58:29,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:29,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:58:29,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:58:29,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:29,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 191 transitions, 2727 flow. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:29,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:29,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:29,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:30,196 INFO L124 PetriNetUnfolderBase]: 582/1275 cut-off events. [2024-01-27 15:58:30,197 INFO L125 PetriNetUnfolderBase]: For 10535/10535 co-relation queries the response was YES. [2024-01-27 15:58:30,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8084 conditions, 1275 events. 582/1275 cut-off events. For 10535/10535 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 8053 event pairs, 34 based on Foata normal form. 5/1242 useless extension candidates. Maximal degree in co-relation 7865. Up to 988 conditions per place. [2024-01-27 15:58:30,206 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 152 selfloop transitions, 78 changer transitions 5/236 dead transitions. [2024-01-27 15:58:30,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 236 transitions, 3444 flow [2024-01-27 15:58:30,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:58:30,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:58:30,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 142 transitions. [2024-01-27 15:58:30,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-01-27 15:58:30,208 INFO L175 Difference]: Start difference. First operand has 175 places, 191 transitions, 2727 flow. Second operand 16 states and 142 transitions. [2024-01-27 15:58:30,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 236 transitions, 3444 flow [2024-01-27 15:58:30,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 236 transitions, 3201 flow, removed 75 selfloop flow, removed 15 redundant places. [2024-01-27 15:58:30,260 INFO L231 Difference]: Finished difference. Result has 176 places, 193 transitions, 2746 flow [2024-01-27 15:58:30,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2510, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2746, PETRI_PLACES=176, PETRI_TRANSITIONS=193} [2024-01-27 15:58:30,261 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 154 predicate places. [2024-01-27 15:58:30,262 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 193 transitions, 2746 flow [2024-01-27 15:58:30,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:30,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:30,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:30,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-01-27 15:58:30,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 15:58:30,477 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:30,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:30,478 INFO L85 PathProgramCache]: Analyzing trace with hash -337525489, now seen corresponding path program 9 times [2024-01-27 15:58:30,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:30,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725910170] [2024-01-27 15:58:30,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:30,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:30,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:30,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725910170] [2024-01-27 15:58:30,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725910170] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:30,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976897182] [2024-01-27 15:58:30,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:58:30,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:30,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:30,597 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:30,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 15:58:30,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:58:30,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:30,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-27 15:58:30,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:30,844 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:58:30,844 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2024-01-27 15:58:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:30,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:30,970 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:58:30,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 154 treesize of output 154 [2024-01-27 15:58:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:31,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976897182] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:31,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:31,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2024-01-27 15:58:31,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141472579] [2024-01-27 15:58:31,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:31,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:58:31,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:31,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:58:31,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:58:31,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:31,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 193 transitions, 2746 flow. Second operand has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:31,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:31,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:31,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:32,127 INFO L124 PetriNetUnfolderBase]: 588/1305 cut-off events. [2024-01-27 15:58:32,127 INFO L125 PetriNetUnfolderBase]: For 8016/8016 co-relation queries the response was YES. [2024-01-27 15:58:32,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7767 conditions, 1305 events. 588/1305 cut-off events. For 8016/8016 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 8353 event pairs, 16 based on Foata normal form. 7/1274 useless extension candidates. Maximal degree in co-relation 7580. Up to 783 conditions per place. [2024-01-27 15:58:32,137 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 125 selfloop transitions, 110 changer transitions 7/243 dead transitions. [2024-01-27 15:58:32,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 243 transitions, 3571 flow [2024-01-27 15:58:32,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:58:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:58:32,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 128 transitions. [2024-01-27 15:58:32,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-01-27 15:58:32,139 INFO L175 Difference]: Start difference. First operand has 176 places, 193 transitions, 2746 flow. Second operand 14 states and 128 transitions. [2024-01-27 15:58:32,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 243 transitions, 3571 flow [2024-01-27 15:58:32,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 243 transitions, 3290 flow, removed 26 selfloop flow, removed 14 redundant places. [2024-01-27 15:58:32,181 INFO L231 Difference]: Finished difference. Result has 178 places, 199 transitions, 2877 flow [2024-01-27 15:58:32,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2465, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2877, PETRI_PLACES=178, PETRI_TRANSITIONS=199} [2024-01-27 15:58:32,182 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 156 predicate places. [2024-01-27 15:58:32,182 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 199 transitions, 2877 flow [2024-01-27 15:58:32,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:32,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:32,182 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:32,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-01-27 15:58:32,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 15:58:32,387 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:32,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:32,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1913449432, now seen corresponding path program 10 times [2024-01-27 15:58:32,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:32,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10534646] [2024-01-27 15:58:32,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:32,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:32,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:32,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:32,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10534646] [2024-01-27 15:58:32,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10534646] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:32,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772929420] [2024-01-27 15:58:32,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:58:32,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:32,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:32,708 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:32,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 15:58:32,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:58:32,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:32,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-27 15:58:32,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:32,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:58:33,001 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:58:33,002 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2024-01-27 15:58:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:33,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:33,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 116 [2024-01-27 15:58:33,389 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:58:33,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 286 treesize of output 240 [2024-01-27 15:58:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:34,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772929420] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:34,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:34,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-01-27 15:58:34,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801905927] [2024-01-27 15:58:34,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:34,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:58:34,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:34,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:58:34,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:58:34,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:34,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 199 transitions, 2877 flow. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:34,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:34,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:34,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:35,111 INFO L124 PetriNetUnfolderBase]: 585/1272 cut-off events. [2024-01-27 15:58:35,111 INFO L125 PetriNetUnfolderBase]: For 7830/7830 co-relation queries the response was YES. [2024-01-27 15:58:35,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7785 conditions, 1272 events. 585/1272 cut-off events. For 7830/7830 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7947 event pairs, 57 based on Foata normal form. 10/1244 useless extension candidates. Maximal degree in co-relation 7605. Up to 808 conditions per place. [2024-01-27 15:58:35,120 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 147 selfloop transitions, 15 changer transitions 91/254 dead transitions. [2024-01-27 15:58:35,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 254 transitions, 3767 flow [2024-01-27 15:58:35,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:58:35,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:58:35,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 113 transitions. [2024-01-27 15:58:35,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139194139194139 [2024-01-27 15:58:35,122 INFO L175 Difference]: Start difference. First operand has 178 places, 199 transitions, 2877 flow. Second operand 13 states and 113 transitions. [2024-01-27 15:58:35,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 254 transitions, 3767 flow [2024-01-27 15:58:35,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 254 transitions, 3668 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-01-27 15:58:35,165 INFO L231 Difference]: Finished difference. Result has 187 places, 158 transitions, 2165 flow [2024-01-27 15:58:35,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2778, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2165, PETRI_PLACES=187, PETRI_TRANSITIONS=158} [2024-01-27 15:58:35,166 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 165 predicate places. [2024-01-27 15:58:35,166 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 158 transitions, 2165 flow [2024-01-27 15:58:35,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:35,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:35,166 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:35,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-27 15:58:35,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-27 15:58:35,378 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:35,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:35,378 INFO L85 PathProgramCache]: Analyzing trace with hash 764408632, now seen corresponding path program 1 times [2024-01-27 15:58:35,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:35,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201290909] [2024-01-27 15:58:35,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:35,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:35,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:35,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:35,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201290909] [2024-01-27 15:58:35,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201290909] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:35,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037329502] [2024-01-27 15:58:35,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:35,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:35,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:35,496 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:35,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-27 15:58:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:35,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:58:35,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:35,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:35,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037329502] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:35,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:35,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-27 15:58:35,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564440848] [2024-01-27 15:58:35,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:35,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:58:35,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:35,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:58:35,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:58:35,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:35,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 158 transitions, 2165 flow. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:35,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:35,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:35,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:36,185 INFO L124 PetriNetUnfolderBase]: 451/906 cut-off events. [2024-01-27 15:58:36,186 INFO L125 PetriNetUnfolderBase]: For 5801/5801 co-relation queries the response was YES. [2024-01-27 15:58:36,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5769 conditions, 906 events. 451/906 cut-off events. For 5801/5801 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4875 event pairs, 54 based on Foata normal form. 8/884 useless extension candidates. Maximal degree in co-relation 5710. Up to 293 conditions per place. [2024-01-27 15:58:36,195 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 149 selfloop transitions, 95 changer transitions 0/245 dead transitions. [2024-01-27 15:58:36,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 245 transitions, 3316 flow [2024-01-27 15:58:36,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:58:36,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:58:36,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 144 transitions. [2024-01-27 15:58:36,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-01-27 15:58:36,198 INFO L175 Difference]: Start difference. First operand has 187 places, 158 transitions, 2165 flow. Second operand 16 states and 144 transitions. [2024-01-27 15:58:36,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 245 transitions, 3316 flow [2024-01-27 15:58:36,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 245 transitions, 3126 flow, removed 42 selfloop flow, removed 20 redundant places. [2024-01-27 15:58:36,224 INFO L231 Difference]: Finished difference. Result has 160 places, 184 transitions, 2577 flow [2024-01-27 15:58:36,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2018, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2577, PETRI_PLACES=160, PETRI_TRANSITIONS=184} [2024-01-27 15:58:36,224 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 138 predicate places. [2024-01-27 15:58:36,225 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 184 transitions, 2577 flow [2024-01-27 15:58:36,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:36,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:36,225 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:36,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-27 15:58:36,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-27 15:58:36,432 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:36,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:36,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1556345470, now seen corresponding path program 2 times [2024-01-27 15:58:36,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:36,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586252828] [2024-01-27 15:58:36,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:36,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:36,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:36,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586252828] [2024-01-27 15:58:36,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586252828] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:36,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585828081] [2024-01-27 15:58:36,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:58:36,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:36,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:36,581 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:36,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 15:58:36,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:58:36,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:36,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:58:36,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:36,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:36,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585828081] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:36,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:36,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-01-27 15:58:36,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566972177] [2024-01-27 15:58:36,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:36,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:58:36,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:36,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:58:36,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:58:36,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:36,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 184 transitions, 2577 flow. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:36,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:36,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:36,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:37,439 INFO L124 PetriNetUnfolderBase]: 459/930 cut-off events. [2024-01-27 15:58:37,439 INFO L125 PetriNetUnfolderBase]: For 6463/6463 co-relation queries the response was YES. [2024-01-27 15:58:37,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6047 conditions, 930 events. 459/930 cut-off events. For 6463/6463 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5131 event pairs, 56 based on Foata normal form. 20/950 useless extension candidates. Maximal degree in co-relation 5992. Up to 305 conditions per place. [2024-01-27 15:58:37,448 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 155 selfloop transitions, 102 changer transitions 0/258 dead transitions. [2024-01-27 15:58:37,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 258 transitions, 3513 flow [2024-01-27 15:58:37,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:58:37,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:58:37,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 167 transitions. [2024-01-27 15:58:37,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4677871148459384 [2024-01-27 15:58:37,479 INFO L175 Difference]: Start difference. First operand has 160 places, 184 transitions, 2577 flow. Second operand 17 states and 167 transitions. [2024-01-27 15:58:37,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 258 transitions, 3513 flow [2024-01-27 15:58:37,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 258 transitions, 3407 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-01-27 15:58:37,515 INFO L231 Difference]: Finished difference. Result has 179 places, 193 transitions, 2870 flow [2024-01-27 15:58:37,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2471, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2870, PETRI_PLACES=179, PETRI_TRANSITIONS=193} [2024-01-27 15:58:37,517 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 157 predicate places. [2024-01-27 15:58:37,517 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 193 transitions, 2870 flow [2024-01-27 15:58:37,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:37,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:37,517 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:37,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-01-27 15:58:37,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:37,732 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:37,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:37,733 INFO L85 PathProgramCache]: Analyzing trace with hash -704012046, now seen corresponding path program 3 times [2024-01-27 15:58:37,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:37,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129342234] [2024-01-27 15:58:37,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:37,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:37,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:37,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129342234] [2024-01-27 15:58:37,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129342234] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:37,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058928446] [2024-01-27 15:58:37,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:58:37,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:37,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:37,873 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:37,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-27 15:58:37,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:58:37,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:37,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:58:37,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:38,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:38,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058928446] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:38,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:38,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-27 15:58:38,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664378824] [2024-01-27 15:58:38,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:38,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:58:38,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:38,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:58:38,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:58:38,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:38,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 193 transitions, 2870 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:38,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:38,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:38,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:39,318 INFO L124 PetriNetUnfolderBase]: 514/1071 cut-off events. [2024-01-27 15:58:39,319 INFO L125 PetriNetUnfolderBase]: For 8365/8365 co-relation queries the response was YES. [2024-01-27 15:58:39,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7107 conditions, 1071 events. 514/1071 cut-off events. For 8365/8365 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6306 event pairs, 94 based on Foata normal form. 24/1095 useless extension candidates. Maximal degree in co-relation 7046. Up to 467 conditions per place. [2024-01-27 15:58:39,331 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 198 selfloop transitions, 99 changer transitions 0/298 dead transitions. [2024-01-27 15:58:39,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 298 transitions, 4177 flow [2024-01-27 15:58:39,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:58:39,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:58:39,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 199 transitions. [2024-01-27 15:58:39,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2024-01-27 15:58:39,332 INFO L175 Difference]: Start difference. First operand has 179 places, 193 transitions, 2870 flow. Second operand 20 states and 199 transitions. [2024-01-27 15:58:39,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 298 transitions, 4177 flow [2024-01-27 15:58:39,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 298 transitions, 4007 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-01-27 15:58:39,373 INFO L231 Difference]: Finished difference. Result has 201 places, 219 transitions, 3412 flow [2024-01-27 15:58:39,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2670, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3412, PETRI_PLACES=201, PETRI_TRANSITIONS=219} [2024-01-27 15:58:39,373 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 179 predicate places. [2024-01-27 15:58:39,374 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 219 transitions, 3412 flow [2024-01-27 15:58:39,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:39,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:39,374 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:39,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-27 15:58:39,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-01-27 15:58:39,586 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:39,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:39,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1739445774, now seen corresponding path program 4 times [2024-01-27 15:58:39,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:39,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111122836] [2024-01-27 15:58:39,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:39,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:39,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:39,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111122836] [2024-01-27 15:58:39,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111122836] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:39,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193574722] [2024-01-27 15:58:39,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:58:39,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:39,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:39,713 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:39,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-27 15:58:39,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:58:39,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:39,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:58:39,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:39,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:39,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:39,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193574722] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:39,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:39,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-27 15:58:39,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799051592] [2024-01-27 15:58:39,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:39,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:58:39,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:39,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:58:39,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:58:39,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:39,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 219 transitions, 3412 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:39,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:39,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:39,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:40,957 INFO L124 PetriNetUnfolderBase]: 510/1039 cut-off events. [2024-01-27 15:58:40,957 INFO L125 PetriNetUnfolderBase]: For 9208/9208 co-relation queries the response was YES. [2024-01-27 15:58:40,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7246 conditions, 1039 events. 510/1039 cut-off events. For 9208/9208 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5966 event pairs, 94 based on Foata normal form. 8/1047 useless extension candidates. Maximal degree in co-relation 7178. Up to 467 conditions per place. [2024-01-27 15:58:40,966 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 178 selfloop transitions, 93 changer transitions 0/272 dead transitions. [2024-01-27 15:58:40,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 272 transitions, 4160 flow [2024-01-27 15:58:40,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:58:40,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:58:40,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 160 transitions. [2024-01-27 15:58:40,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-01-27 15:58:40,969 INFO L175 Difference]: Start difference. First operand has 201 places, 219 transitions, 3412 flow. Second operand 16 states and 160 transitions. [2024-01-27 15:58:40,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 272 transitions, 4160 flow [2024-01-27 15:58:41,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 272 transitions, 3974 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-01-27 15:58:41,029 INFO L231 Difference]: Finished difference. Result has 210 places, 219 transitions, 3440 flow [2024-01-27 15:58:41,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3154, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3440, PETRI_PLACES=210, PETRI_TRANSITIONS=219} [2024-01-27 15:58:41,029 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 188 predicate places. [2024-01-27 15:58:41,030 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 219 transitions, 3440 flow [2024-01-27 15:58:41,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:41,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:41,030 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:41,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-27 15:58:41,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:41,243 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:41,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:41,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1854867832, now seen corresponding path program 5 times [2024-01-27 15:58:41,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:41,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352179661] [2024-01-27 15:58:41,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:41,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:41,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:41,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352179661] [2024-01-27 15:58:41,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352179661] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:41,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972764716] [2024-01-27 15:58:41,377 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:58:41,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:41,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:41,392 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:41,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-27 15:58:41,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:58:41,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:41,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:58:41,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:41,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:41,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972764716] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:41,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:41,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-01-27 15:58:41,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640708540] [2024-01-27 15:58:41,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:41,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:58:41,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:41,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:58:41,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:58:41,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:41,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 219 transitions, 3440 flow. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:41,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:41,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:41,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:42,519 INFO L124 PetriNetUnfolderBase]: 625/1239 cut-off events. [2024-01-27 15:58:42,519 INFO L125 PetriNetUnfolderBase]: For 11469/11469 co-relation queries the response was YES. [2024-01-27 15:58:42,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8789 conditions, 1239 events. 625/1239 cut-off events. For 11469/11469 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 7182 event pairs, 103 based on Foata normal form. 6/1245 useless extension candidates. Maximal degree in co-relation 8720. Up to 591 conditions per place. [2024-01-27 15:58:42,528 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 175 selfloop transitions, 124 changer transitions 0/300 dead transitions. [2024-01-27 15:58:42,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 300 transitions, 4889 flow [2024-01-27 15:58:42,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:58:42,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:58:42,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 133 transitions. [2024-01-27 15:58:42,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-01-27 15:58:42,530 INFO L175 Difference]: Start difference. First operand has 210 places, 219 transitions, 3440 flow. Second operand 14 states and 133 transitions. [2024-01-27 15:58:42,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 300 transitions, 4889 flow [2024-01-27 15:58:42,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 300 transitions, 4674 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-01-27 15:58:42,585 INFO L231 Difference]: Finished difference. Result has 221 places, 255 transitions, 4250 flow [2024-01-27 15:58:42,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3261, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4250, PETRI_PLACES=221, PETRI_TRANSITIONS=255} [2024-01-27 15:58:42,586 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 199 predicate places. [2024-01-27 15:58:42,586 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 255 transitions, 4250 flow [2024-01-27 15:58:42,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:42,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:42,586 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:42,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-01-27 15:58:42,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:42,798 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:42,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:42,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1053523576, now seen corresponding path program 6 times [2024-01-27 15:58:42,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:42,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061784728] [2024-01-27 15:58:42,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:42,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:42,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:42,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061784728] [2024-01-27 15:58:42,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061784728] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:42,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319124787] [2024-01-27 15:58:42,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:58:42,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:42,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:42,947 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:42,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-27 15:58:43,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:58:43,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:43,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:58:43,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:43,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:43,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319124787] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:43,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:43,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-27 15:58:43,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828053760] [2024-01-27 15:58:43,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:43,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:58:43,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:43,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:58:43,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:58:43,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:43,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 255 transitions, 4250 flow. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:43,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:43,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:43,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:43,998 INFO L124 PetriNetUnfolderBase]: 784/1530 cut-off events. [2024-01-27 15:58:43,998 INFO L125 PetriNetUnfolderBase]: For 15609/15609 co-relation queries the response was YES. [2024-01-27 15:58:44,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11215 conditions, 1530 events. 784/1530 cut-off events. For 15609/15609 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9136 event pairs, 28 based on Foata normal form. 6/1536 useless extension candidates. Maximal degree in co-relation 11140. Up to 481 conditions per place. [2024-01-27 15:58:44,010 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 192 selfloop transitions, 181 changer transitions 0/374 dead transitions. [2024-01-27 15:58:44,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 374 transitions, 6475 flow [2024-01-27 15:58:44,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:58:44,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:58:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 158 transitions. [2024-01-27 15:58:44,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-01-27 15:58:44,012 INFO L175 Difference]: Start difference. First operand has 221 places, 255 transitions, 4250 flow. Second operand 16 states and 158 transitions. [2024-01-27 15:58:44,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 374 transitions, 6475 flow [2024-01-27 15:58:44,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 374 transitions, 6193 flow, removed 114 selfloop flow, removed 4 redundant places. [2024-01-27 15:58:44,094 INFO L231 Difference]: Finished difference. Result has 237 places, 305 transitions, 5380 flow [2024-01-27 15:58:44,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4052, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5380, PETRI_PLACES=237, PETRI_TRANSITIONS=305} [2024-01-27 15:58:44,094 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 215 predicate places. [2024-01-27 15:58:44,095 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 305 transitions, 5380 flow [2024-01-27 15:58:44,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:44,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:44,095 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:44,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-27 15:58:44,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-01-27 15:58:44,308 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:44,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:44,309 INFO L85 PathProgramCache]: Analyzing trace with hash 961144048, now seen corresponding path program 7 times [2024-01-27 15:58:44,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:44,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673023928] [2024-01-27 15:58:44,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:44,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:44,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:44,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673023928] [2024-01-27 15:58:44,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673023928] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:44,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940993313] [2024-01-27 15:58:44,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:58:44,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:44,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:44,459 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:44,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-27 15:58:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:44,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:58:44,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:44,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:44,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940993313] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:44,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:44,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-01-27 15:58:44,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889174337] [2024-01-27 15:58:44,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:44,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:58:44,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:44,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:58:44,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:58:44,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:44,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 305 transitions, 5380 flow. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:44,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:44,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:44,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:45,293 INFO L124 PetriNetUnfolderBase]: 864/1690 cut-off events. [2024-01-27 15:58:45,293 INFO L125 PetriNetUnfolderBase]: For 20736/20736 co-relation queries the response was YES. [2024-01-27 15:58:45,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12839 conditions, 1690 events. 864/1690 cut-off events. For 20736/20736 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 10237 event pairs, 40 based on Foata normal form. 6/1696 useless extension candidates. Maximal degree in co-relation 12758. Up to 517 conditions per place. [2024-01-27 15:58:45,305 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 199 selfloop transitions, 201 changer transitions 0/401 dead transitions. [2024-01-27 15:58:45,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 401 transitions, 7298 flow [2024-01-27 15:58:45,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:58:45,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:58:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 146 transitions. [2024-01-27 15:58:45,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-01-27 15:58:45,307 INFO L175 Difference]: Start difference. First operand has 237 places, 305 transitions, 5380 flow. Second operand 14 states and 146 transitions. [2024-01-27 15:58:45,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 401 transitions, 7298 flow [2024-01-27 15:58:45,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 401 transitions, 6877 flow, removed 169 selfloop flow, removed 7 redundant places. [2024-01-27 15:58:45,408 INFO L231 Difference]: Finished difference. Result has 249 places, 331 transitions, 6055 flow [2024-01-27 15:58:45,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5016, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6055, PETRI_PLACES=249, PETRI_TRANSITIONS=331} [2024-01-27 15:58:45,409 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 227 predicate places. [2024-01-27 15:58:45,409 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 331 transitions, 6055 flow [2024-01-27 15:58:45,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:45,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:45,409 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:45,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-27 15:58:45,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:45,626 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:45,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:45,627 INFO L85 PathProgramCache]: Analyzing trace with hash -2041940248, now seen corresponding path program 11 times [2024-01-27 15:58:45,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:45,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927603363] [2024-01-27 15:58:45,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:45,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:46,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:46,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927603363] [2024-01-27 15:58:46,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927603363] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:46,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259328496] [2024-01-27 15:58:46,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:58:46,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:46,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:46,145 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:46,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-27 15:58:46,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:58:46,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:46,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-27 15:58:46,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:46,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:58:46,518 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 23 [2024-01-27 15:58:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:46,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:47,128 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-27 15:58:47,129 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 77 [2024-01-27 15:58:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:47,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259328496] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:47,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:47,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 22 [2024-01-27 15:58:47,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416077192] [2024-01-27 15:58:47,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:47,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:58:47,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:47,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:58:47,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:58:47,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:47,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 331 transitions, 6055 flow. Second operand has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 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) [2024-01-27 15:58:47,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:47,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:47,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:50,535 INFO L124 PetriNetUnfolderBase]: 1137/2232 cut-off events. [2024-01-27 15:58:50,535 INFO L125 PetriNetUnfolderBase]: For 27219/27219 co-relation queries the response was YES. [2024-01-27 15:58:50,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17328 conditions, 2232 events. 1137/2232 cut-off events. For 27219/27219 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14423 event pairs, 32 based on Foata normal form. 3/2235 useless extension candidates. Maximal degree in co-relation 17244. Up to 621 conditions per place. [2024-01-27 15:58:50,555 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 166 selfloop transitions, 383 changer transitions 11/561 dead transitions. [2024-01-27 15:58:50,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 561 transitions, 10090 flow [2024-01-27 15:58:50,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-27 15:58:50,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-27 15:58:50,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 324 transitions. [2024-01-27 15:58:50,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40601503759398494 [2024-01-27 15:58:50,557 INFO L175 Difference]: Start difference. First operand has 249 places, 331 transitions, 6055 flow. Second operand 38 states and 324 transitions. [2024-01-27 15:58:50,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 561 transitions, 10090 flow [2024-01-27 15:58:50,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 561 transitions, 9814 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-01-27 15:58:50,716 INFO L231 Difference]: Finished difference. Result has 290 places, 462 transitions, 9518 flow [2024-01-27 15:58:50,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5857, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=9518, PETRI_PLACES=290, PETRI_TRANSITIONS=462} [2024-01-27 15:58:50,717 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 268 predicate places. [2024-01-27 15:58:50,717 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 462 transitions, 9518 flow [2024-01-27 15:58:50,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 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) [2024-01-27 15:58:50,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:50,717 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:50,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-27 15:58:50,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:50,929 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:50,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:50,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1891069104, now seen corresponding path program 12 times [2024-01-27 15:58:50,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:50,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729004223] [2024-01-27 15:58:50,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:50,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:51,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:51,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729004223] [2024-01-27 15:58:51,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729004223] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:51,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675727235] [2024-01-27 15:58:51,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:58:51,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:51,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:51,430 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:51,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-27 15:58:51,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:58:51,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:51,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:58:51,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:51,793 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:58:51,793 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 23 [2024-01-27 15:58:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:51,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:52,453 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:58:52,453 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 141 [2024-01-27 15:58:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:53,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675727235] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:53,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:53,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 23 [2024-01-27 15:58:53,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404017363] [2024-01-27 15:58:53,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:53,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:58:53,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:53,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:58:53,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:58:53,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:53,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 462 transitions, 9518 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) [2024-01-27 15:58:53,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:53,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:53,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:57,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:59:02,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:59:08,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:59:12,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:59:16,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:59:18,041 INFO L124 PetriNetUnfolderBase]: 1277/2501 cut-off events. [2024-01-27 15:59:18,041 INFO L125 PetriNetUnfolderBase]: For 37590/37590 co-relation queries the response was YES. [2024-01-27 15:59:18,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21435 conditions, 2501 events. 1277/2501 cut-off events. For 37590/37590 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 16619 event pairs, 30 based on Foata normal form. 10/2511 useless extension candidates. Maximal degree in co-relation 21342. Up to 1215 conditions per place. [2024-01-27 15:59:18,126 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 329 selfloop transitions, 271 changer transitions 16/617 dead transitions. [2024-01-27 15:59:18,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 617 transitions, 12504 flow [2024-01-27 15:59:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-01-27 15:59:18,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-01-27 15:59:18,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 340 transitions. [2024-01-27 15:59:18,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3854875283446712 [2024-01-27 15:59:18,127 INFO L175 Difference]: Start difference. First operand has 290 places, 462 transitions, 9518 flow. Second operand 42 states and 340 transitions. [2024-01-27 15:59:18,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 617 transitions, 12504 flow [2024-01-27 15:59:18,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 617 transitions, 11828 flow, removed 241 selfloop flow, removed 11 redundant places. [2024-01-27 15:59:18,447 INFO L231 Difference]: Finished difference. Result has 327 places, 513 transitions, 10996 flow [2024-01-27 15:59:18,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=8949, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=10996, PETRI_PLACES=327, PETRI_TRANSITIONS=513} [2024-01-27 15:59:18,448 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 305 predicate places. [2024-01-27 15:59:18,448 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 513 transitions, 10996 flow [2024-01-27 15:59:18,448 INFO L496 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) [2024-01-27 15:59:18,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:59:18,449 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:59:18,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-27 15:59:18,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:18,653 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:59:18,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:59:18,653 INFO L85 PathProgramCache]: Analyzing trace with hash -2006905978, now seen corresponding path program 8 times [2024-01-27 15:59:18,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:59:18,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283137069] [2024-01-27 15:59:18,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:59:18,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:59:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:18,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:59:18,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283137069] [2024-01-27 15:59:18,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283137069] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:59:18,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774540728] [2024-01-27 15:59:18,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:59:18,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:18,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:59:18,771 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:59:18,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-27 15:59:18,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:59:18,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:59:18,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:59:18,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:59:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:18,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:59:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:19,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774540728] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:59:19,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:59:19,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-01-27 15:59:19,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732771381] [2024-01-27 15:59:19,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:59:19,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:59:19,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:59:19,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:59:19,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:59:19,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:59:19,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 513 transitions, 10996 flow. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:19,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:59:19,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:59:19,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:59:20,754 INFO L124 PetriNetUnfolderBase]: 1443/2777 cut-off events. [2024-01-27 15:59:20,755 INFO L125 PetriNetUnfolderBase]: For 46750/46750 co-relation queries the response was YES. [2024-01-27 15:59:20,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24462 conditions, 2777 events. 1443/2777 cut-off events. For 46750/46750 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 18480 event pairs, 29 based on Foata normal form. 40/2817 useless extension candidates. Maximal degree in co-relation 24361. Up to 781 conditions per place. [2024-01-27 15:59:20,784 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 262 selfloop transitions, 434 changer transitions 1/698 dead transitions. [2024-01-27 15:59:20,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 698 transitions, 14663 flow [2024-01-27 15:59:20,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-27 15:59:20,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-27 15:59:20,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 281 transitions. [2024-01-27 15:59:20,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44603174603174606 [2024-01-27 15:59:20,786 INFO L175 Difference]: Start difference. First operand has 327 places, 513 transitions, 10996 flow. Second operand 30 states and 281 transitions. [2024-01-27 15:59:20,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 698 transitions, 14663 flow [2024-01-27 15:59:21,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 698 transitions, 14361 flow, removed 62 selfloop flow, removed 24 redundant places. [2024-01-27 15:59:21,179 INFO L231 Difference]: Finished difference. Result has 335 places, 583 transitions, 13427 flow [2024-01-27 15:59:21,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=10661, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=13427, PETRI_PLACES=335, PETRI_TRANSITIONS=583} [2024-01-27 15:59:21,180 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 313 predicate places. [2024-01-27 15:59:21,180 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 583 transitions, 13427 flow [2024-01-27 15:59:21,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:21,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:59:21,180 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:59:21,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-27 15:59:21,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-01-27 15:59:21,393 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:59:21,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:59:21,393 INFO L85 PathProgramCache]: Analyzing trace with hash 966541634, now seen corresponding path program 9 times [2024-01-27 15:59:21,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:59:21,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555204893] [2024-01-27 15:59:21,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:59:21,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:59:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:21,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:21,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:59:21,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555204893] [2024-01-27 15:59:21,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555204893] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:59:21,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408823766] [2024-01-27 15:59:21,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:59:21,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:21,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:59:21,552 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:59:21,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-27 15:59:21,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:59:21,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:59:21,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:59:21,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:59:21,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:21,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:59:21,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:21,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408823766] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:59:21,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:59:21,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-27 15:59:21,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739163207] [2024-01-27 15:59:21,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:59:21,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:59:21,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:59:21,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:59:21,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:59:21,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:59:21,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 583 transitions, 13427 flow. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:21,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:59:21,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:59:21,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:59:23,700 INFO L124 PetriNetUnfolderBase]: 1639/3278 cut-off events. [2024-01-27 15:59:23,701 INFO L125 PetriNetUnfolderBase]: For 62169/62169 co-relation queries the response was YES. [2024-01-27 15:59:23,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29962 conditions, 3278 events. 1639/3278 cut-off events. For 62169/62169 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23084 event pairs, 37 based on Foata normal form. 24/3302 useless extension candidates. Maximal degree in co-relation 29860. Up to 943 conditions per place. [2024-01-27 15:59:23,732 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 351 selfloop transitions, 443 changer transitions 2/797 dead transitions. [2024-01-27 15:59:23,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 797 transitions, 18271 flow [2024-01-27 15:59:23,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-27 15:59:23,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-27 15:59:23,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 273 transitions. [2024-01-27 15:59:23,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-01-27 15:59:23,734 INFO L175 Difference]: Start difference. First operand has 335 places, 583 transitions, 13427 flow. Second operand 30 states and 273 transitions. [2024-01-27 15:59:23,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 797 transitions, 18271 flow [2024-01-27 15:59:24,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 797 transitions, 17261 flow, removed 370 selfloop flow, removed 9 redundant places. [2024-01-27 15:59:24,221 INFO L231 Difference]: Finished difference. Result has 361 places, 660 transitions, 15625 flow [2024-01-27 15:59:24,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=12534, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=15625, PETRI_PLACES=361, PETRI_TRANSITIONS=660} [2024-01-27 15:59:24,226 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 339 predicate places. [2024-01-27 15:59:24,226 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 660 transitions, 15625 flow [2024-01-27 15:59:24,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:24,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:59:24,227 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:59:24,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-01-27 15:59:24,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-01-27 15:59:24,442 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:59:24,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:59:24,442 INFO L85 PathProgramCache]: Analyzing trace with hash 133902402, now seen corresponding path program 10 times [2024-01-27 15:59:24,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:59:24,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416993969] [2024-01-27 15:59:24,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:59:24,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:59:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:24,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:59:24,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416993969] [2024-01-27 15:59:24,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416993969] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:59:24,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945321546] [2024-01-27 15:59:24,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:59:24,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:24,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:59:24,556 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:59:24,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-27 15:59:24,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:59:24,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:59:24,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:59:24,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:59:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:24,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:59:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:24,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945321546] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:59:24,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:59:24,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-01-27 15:59:24,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922337916] [2024-01-27 15:59:24,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:59:24,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:59:24,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:59:24,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:59:24,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:59:24,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:59:24,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 660 transitions, 15625 flow. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:24,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:59:24,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:59:24,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:59:32,210 INFO L124 PetriNetUnfolderBase]: 1755/3534 cut-off events. [2024-01-27 15:59:32,211 INFO L125 PetriNetUnfolderBase]: For 71565/71565 co-relation queries the response was YES. [2024-01-27 15:59:32,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32797 conditions, 3534 events. 1755/3534 cut-off events. For 71565/71565 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 25496 event pairs, 229 based on Foata normal form. 44/3578 useless extension candidates. Maximal degree in co-relation 32690. Up to 1437 conditions per place. [2024-01-27 15:59:32,249 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 363 selfloop transitions, 428 changer transitions 0/792 dead transitions. [2024-01-27 15:59:32,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 792 transitions, 18808 flow [2024-01-27 15:59:32,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:59:32,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:59:32,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 233 transitions. [2024-01-27 15:59:32,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4438095238095238 [2024-01-27 15:59:32,251 INFO L175 Difference]: Start difference. First operand has 361 places, 660 transitions, 15625 flow. Second operand 25 states and 233 transitions. [2024-01-27 15:59:32,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 792 transitions, 18808 flow [2024-01-27 15:59:32,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 792 transitions, 17902 flow, removed 256 selfloop flow, removed 12 redundant places. [2024-01-27 15:59:32,899 INFO L231 Difference]: Finished difference. Result has 380 places, 708 transitions, 17370 flow [2024-01-27 15:59:32,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=14698, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=17370, PETRI_PLACES=380, PETRI_TRANSITIONS=708} [2024-01-27 15:59:32,902 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 358 predicate places. [2024-01-27 15:59:32,902 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 708 transitions, 17370 flow [2024-01-27 15:59:32,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:32,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:59:32,902 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:59:32,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-01-27 15:59:33,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-27 15:59:33,113 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:59:33,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:59:33,113 INFO L85 PathProgramCache]: Analyzing trace with hash 327834786, now seen corresponding path program 13 times [2024-01-27 15:59:33,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:59:33,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579241658] [2024-01-27 15:59:33,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:59:33,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:59:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:59:33,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:59:33,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579241658] [2024-01-27 15:59:33,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579241658] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:59:33,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742970184] [2024-01-27 15:59:33,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:59:33,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:33,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:59:33,557 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:59:33,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-27 15:59:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:33,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:59:33,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:59:33,892 INFO L349 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2024-01-27 15:59:33,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 119 [2024-01-27 15:59:33,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:59:33,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:59:34,447 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:59:34,448 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 141 [2024-01-27 15:59:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:34,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742970184] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:59:34,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:59:34,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 21 [2024-01-27 15:59:34,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180038053] [2024-01-27 15:59:34,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:59:34,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:59:34,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:59:34,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:59:34,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:59:34,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:59:34,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 708 transitions, 17370 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) [2024-01-27 15:59:34,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:59:34,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:59:34,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:59:37,586 INFO L124 PetriNetUnfolderBase]: 1766/3569 cut-off events. [2024-01-27 15:59:37,586 INFO L125 PetriNetUnfolderBase]: For 71290/71290 co-relation queries the response was YES. [2024-01-27 15:59:37,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33767 conditions, 3569 events. 1766/3569 cut-off events. For 71290/71290 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 25800 event pairs, 32 based on Foata normal form. 1/3570 useless extension candidates. Maximal degree in co-relation 33654. Up to 2281 conditions per place. [2024-01-27 15:59:37,625 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 527 selfloop transitions, 256 changer transitions 6/790 dead transitions. [2024-01-27 15:59:37,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 790 transitions, 19304 flow [2024-01-27 15:59:37,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-27 15:59:37,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-27 15:59:37,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 251 transitions. [2024-01-27 15:59:37,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3984126984126984 [2024-01-27 15:59:37,640 INFO L175 Difference]: Start difference. First operand has 380 places, 708 transitions, 17370 flow. Second operand 30 states and 251 transitions. [2024-01-27 15:59:37,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 790 transitions, 19304 flow [2024-01-27 15:59:38,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 790 transitions, 18580 flow, removed 119 selfloop flow, removed 14 redundant places. [2024-01-27 15:59:38,314 INFO L231 Difference]: Finished difference. Result has 399 places, 716 transitions, 17443 flow [2024-01-27 15:59:38,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=16652, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=17443, PETRI_PLACES=399, PETRI_TRANSITIONS=716} [2024-01-27 15:59:38,315 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 377 predicate places. [2024-01-27 15:59:38,315 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 716 transitions, 17443 flow [2024-01-27 15:59:38,316 INFO L496 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) [2024-01-27 15:59:38,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:59:38,316 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:59:38,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-01-27 15:59:38,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:38,527 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:59:38,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:59:38,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1948603128, now seen corresponding path program 11 times [2024-01-27 15:59:38,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:59:38,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618149401] [2024-01-27 15:59:38,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:59:38,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:59:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:38,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:59:38,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618149401] [2024-01-27 15:59:38,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618149401] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:59:38,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242199963] [2024-01-27 15:59:38,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:59:38,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:38,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:59:38,640 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:59:38,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-27 15:59:38,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:59:38,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:59:38,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:59:38,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:59:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:38,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:59:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:39,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242199963] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:59:39,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:59:39,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-27 15:59:39,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081278939] [2024-01-27 15:59:39,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:59:39,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:59:39,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:59:39,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:59:39,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:59:39,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:59:39,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 716 transitions, 17443 flow. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:39,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:59:39,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:59:39,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:59:43,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:59:45,016 INFO L124 PetriNetUnfolderBase]: 1774/3586 cut-off events. [2024-01-27 15:59:45,017 INFO L125 PetriNetUnfolderBase]: For 75436/75436 co-relation queries the response was YES. [2024-01-27 15:59:45,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34087 conditions, 3586 events. 1774/3586 cut-off events. For 75436/75436 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 25992 event pairs, 255 based on Foata normal form. 36/3622 useless extension candidates. Maximal degree in co-relation 33971. Up to 1467 conditions per place. [2024-01-27 15:59:45,061 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 455 selfloop transitions, 333 changer transitions 1/790 dead transitions. [2024-01-27 15:59:45,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 790 transitions, 19618 flow [2024-01-27 15:59:45,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:59:45,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:59:45,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 167 transitions. [2024-01-27 15:59:45,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41854636591478694 [2024-01-27 15:59:45,064 INFO L175 Difference]: Start difference. First operand has 399 places, 716 transitions, 17443 flow. Second operand 19 states and 167 transitions. [2024-01-27 15:59:45,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 790 transitions, 19618 flow [2024-01-27 15:59:45,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 790 transitions, 19481 flow, removed 39 selfloop flow, removed 12 redundant places. [2024-01-27 15:59:45,889 INFO L231 Difference]: Finished difference. Result has 408 places, 726 transitions, 18220 flow [2024-01-27 15:59:45,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=17233, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=18220, PETRI_PLACES=408, PETRI_TRANSITIONS=726} [2024-01-27 15:59:45,890 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 386 predicate places. [2024-01-27 15:59:45,890 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 726 transitions, 18220 flow [2024-01-27 15:59:45,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:45,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:59:45,891 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:59:45,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-01-27 15:59:46,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:46,103 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:59:46,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:59:46,103 INFO L85 PathProgramCache]: Analyzing trace with hash 633647722, now seen corresponding path program 14 times [2024-01-27 15:59:46,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:59:46,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236299730] [2024-01-27 15:59:46,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:59:46,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:59:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:59:46,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:59:46,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236299730] [2024-01-27 15:59:46,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236299730] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:59:46,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640946861] [2024-01-27 15:59:46,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:59:46,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:46,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:59:46,660 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:59:46,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-27 15:59:46,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:59:46,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:59:46,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:59:46,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:59:47,076 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:59:47,077 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 43 [2024-01-27 15:59:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:59:47,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:59:47,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:59:47,426 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 141 [2024-01-27 15:59:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:59:47,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640946861] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:59:47,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:59:47,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 8] total 25 [2024-01-27 15:59:47,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461785042] [2024-01-27 15:59:47,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:59:47,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:59:47,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:59:47,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:59:47,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:59:47,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:59:47,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 726 transitions, 18220 flow. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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) [2024-01-27 15:59:47,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:59:47,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:59:47,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:59:51,129 INFO L124 PetriNetUnfolderBase]: 1886/3796 cut-off events. [2024-01-27 15:59:51,130 INFO L125 PetriNetUnfolderBase]: For 82359/82359 co-relation queries the response was YES. [2024-01-27 15:59:51,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37095 conditions, 3796 events. 1886/3796 cut-off events. For 82359/82359 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 27786 event pairs, 37 based on Foata normal form. 2/3798 useless extension candidates. Maximal degree in co-relation 36977. Up to 2271 conditions per place. [2024-01-27 15:59:51,174 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 527 selfloop transitions, 307 changer transitions 8/843 dead transitions. [2024-01-27 15:59:51,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 843 transitions, 21274 flow [2024-01-27 15:59:51,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-27 15:59:51,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-27 15:59:51,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 262 transitions. [2024-01-27 15:59:51,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36694677871148457 [2024-01-27 15:59:51,176 INFO L175 Difference]: Start difference. First operand has 408 places, 726 transitions, 18220 flow. Second operand 34 states and 262 transitions. [2024-01-27 15:59:51,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 843 transitions, 21274 flow [2024-01-27 15:59:52,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 843 transitions, 21070 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-01-27 15:59:52,119 INFO L231 Difference]: Finished difference. Result has 439 places, 773 transitions, 20025 flow [2024-01-27 15:59:52,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=18047, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=20025, PETRI_PLACES=439, PETRI_TRANSITIONS=773} [2024-01-27 15:59:52,121 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 417 predicate places. [2024-01-27 15:59:52,121 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 773 transitions, 20025 flow [2024-01-27 15:59:52,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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) [2024-01-27 15:59:52,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:59:52,122 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:59:52,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-01-27 15:59:52,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-01-27 15:59:52,335 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:59:52,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:59:52,336 INFO L85 PathProgramCache]: Analyzing trace with hash 98798197, now seen corresponding path program 15 times [2024-01-27 15:59:52,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:59:52,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053069094] [2024-01-27 15:59:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:59:52,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:59:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:52,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:59:52,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053069094] [2024-01-27 15:59:52,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053069094] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:59:52,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945312016] [2024-01-27 15:59:52,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:59:52,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:52,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:59:52,464 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:59:52,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-01-27 15:59:52,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:59:52,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:59:52,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:59:52,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:59:52,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:52,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:59:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:52,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945312016] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:59:52,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:59:52,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2024-01-27 15:59:52,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447439564] [2024-01-27 15:59:52,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:59:52,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:59:52,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:59:52,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:59:52,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:59:52,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:59:52,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 773 transitions, 20025 flow. Second operand has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:52,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:59:52,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:59:52,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:59:54,682 INFO L124 PetriNetUnfolderBase]: 2406/4829 cut-off events. [2024-01-27 15:59:54,683 INFO L125 PetriNetUnfolderBase]: For 120565/120565 co-relation queries the response was YES. [2024-01-27 15:59:54,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48311 conditions, 4829 events. 2406/4829 cut-off events. For 120565/120565 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 36283 event pairs, 272 based on Foata normal form. 94/4923 useless extension candidates. Maximal degree in co-relation 48187. Up to 1320 conditions per place. [2024-01-27 15:59:54,742 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 723 selfloop transitions, 306 changer transitions 0/1030 dead transitions. [2024-01-27 15:59:54,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 1030 transitions, 27112 flow [2024-01-27 15:59:54,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 15:59:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 15:59:54,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 188 transitions. [2024-01-27 15:59:54,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-01-27 15:59:54,745 INFO L175 Difference]: Start difference. First operand has 439 places, 773 transitions, 20025 flow. Second operand 18 states and 188 transitions. [2024-01-27 15:59:54,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 1030 transitions, 27112 flow [2024-01-27 15:59:55,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 1030 transitions, 26919 flow, removed 40 selfloop flow, removed 19 redundant places. [2024-01-27 15:59:55,839 INFO L231 Difference]: Finished difference. Result has 440 places, 812 transitions, 21413 flow [2024-01-27 15:59:55,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=19313, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=21413, PETRI_PLACES=440, PETRI_TRANSITIONS=812} [2024-01-27 15:59:55,840 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 418 predicate places. [2024-01-27 15:59:55,840 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 812 transitions, 21413 flow [2024-01-27 15:59:55,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:59:55,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:59:55,841 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:59:55,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-01-27 15:59:56,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-01-27 15:59:56,052 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:59:56,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:59:56,053 INFO L85 PathProgramCache]: Analyzing trace with hash -676975830, now seen corresponding path program 1 times [2024-01-27 15:59:56,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:59:56,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005191656] [2024-01-27 15:59:56,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:59:56,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:59:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:56,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:56,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:59:56,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005191656] [2024-01-27 15:59:56,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005191656] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:59:56,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487310069] [2024-01-27 15:59:56,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:59:56,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:56,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:59:56,196 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:59:56,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-01-27 15:59:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:56,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 53 conjunts are in the unsatisfiable core [2024-01-27 15:59:56,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:59:56,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:59:56,810 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-01-27 15:59:56,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:59:56,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:59:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:58,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487310069] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:59:58,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:59:58,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 25 [2024-01-27 15:59:58,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966564926] [2024-01-27 15:59:58,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:59:58,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:59:58,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:59:58,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:59:58,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:59:58,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:59:58,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 812 transitions, 21413 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) [2024-01-27 15:59:58,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:59:58,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:59:58,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:00:11,011 WARN L293 SmtUtils]: Spent 11.58s on a formula simplification. DAG size of input: 100 DAG size of output: 56 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:00:28,576 WARN L293 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 139 DAG size of output: 106 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:00:48,993 INFO L124 PetriNetUnfolderBase]: 2363/4771 cut-off events. [2024-01-27 16:00:48,994 INFO L125 PetriNetUnfolderBase]: For 124909/124909 co-relation queries the response was YES. [2024-01-27 16:00:49,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48451 conditions, 4771 events. 2363/4771 cut-off events. For 124909/124909 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 36175 event pairs, 34 based on Foata normal form. 65/4836 useless extension candidates. Maximal degree in co-relation 48326. Up to 1101 conditions per place. [2024-01-27 16:00:49,047 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 375 selfloop transitions, 631 changer transitions 37/1044 dead transitions. [2024-01-27 16:00:49,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 1044 transitions, 26041 flow [2024-01-27 16:00:49,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-01-27 16:00:49,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-01-27 16:00:49,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 427 transitions. [2024-01-27 16:00:49,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-01-27 16:00:49,049 INFO L175 Difference]: Start difference. First operand has 440 places, 812 transitions, 21413 flow. Second operand 49 states and 427 transitions. [2024-01-27 16:00:49,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 1044 transitions, 26041 flow [2024-01-27 16:00:50,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 1044 transitions, 25660 flow, removed 110 selfloop flow, removed 6 redundant places. [2024-01-27 16:00:50,156 INFO L231 Difference]: Finished difference. Result has 493 places, 854 transitions, 23840 flow [2024-01-27 16:00:50,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=20802, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=574, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=23840, PETRI_PLACES=493, PETRI_TRANSITIONS=854} [2024-01-27 16:00:50,157 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 471 predicate places. [2024-01-27 16:00:50,157 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 854 transitions, 23840 flow [2024-01-27 16:00:50,158 INFO L496 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) [2024-01-27 16:00:50,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:00:50,158 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:00:50,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-01-27 16:00:50,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:00:50,369 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:00:50,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:00:50,370 INFO L85 PathProgramCache]: Analyzing trace with hash 925422472, now seen corresponding path program 2 times [2024-01-27 16:00:50,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:00:50,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594782508] [2024-01-27 16:00:50,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:00:50,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:00:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:00:50,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:00:50,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:00:50,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594782508] [2024-01-27 16:00:50,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594782508] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:00:50,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366562637] [2024-01-27 16:00:50,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 16:00:50,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:00:50,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:00:50,521 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) [2024-01-27 16:00:50,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-01-27 16:00:50,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 16:00:50,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:00:50,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 49 conjunts are in the unsatisfiable core [2024-01-27 16:00:50,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:00:50,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 16:00:51,132 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-01-27 16:00:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:00:51,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:00:52,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:00:52,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366562637] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:00:52,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:00:52,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 25 [2024-01-27 16:00:52,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873897117] [2024-01-27 16:00:52,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:00:52,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 16:00:52,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:00:52,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 16:00:52,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2024-01-27 16:00:52,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:00:52,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 854 transitions, 23840 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:00:52,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:00:52,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:00:52,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:01:10,777 INFO L124 PetriNetUnfolderBase]: 2451/4929 cut-off events. [2024-01-27 16:01:10,777 INFO L125 PetriNetUnfolderBase]: For 139856/139856 co-relation queries the response was YES. [2024-01-27 16:01:10,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52490 conditions, 4929 events. 2451/4929 cut-off events. For 139856/139856 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 37458 event pairs, 79 based on Foata normal form. 21/4950 useless extension candidates. Maximal degree in co-relation 52354. Up to 1201 conditions per place. [2024-01-27 16:01:10,844 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 521 selfloop transitions, 571 changer transitions 20/1113 dead transitions. [2024-01-27 16:01:10,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 1113 transitions, 28897 flow [2024-01-27 16:01:10,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-01-27 16:01:10,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2024-01-27 16:01:10,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 524 transitions. [2024-01-27 16:01:10,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4302134646962233 [2024-01-27 16:01:10,846 INFO L175 Difference]: Start difference. First operand has 493 places, 854 transitions, 23840 flow. Second operand 58 states and 524 transitions. [2024-01-27 16:01:10,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 1113 transitions, 28897 flow [2024-01-27 16:01:12,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 1113 transitions, 27739 flow, removed 144 selfloop flow, removed 33 redundant places. [2024-01-27 16:01:12,347 INFO L231 Difference]: Finished difference. Result has 523 places, 911 transitions, 25750 flow [2024-01-27 16:01:12,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=22773, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=854, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=511, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=25750, PETRI_PLACES=523, PETRI_TRANSITIONS=911} [2024-01-27 16:01:12,348 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 501 predicate places. [2024-01-27 16:01:12,348 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 911 transitions, 25750 flow [2024-01-27 16:01:12,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:01:12,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:01:12,349 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:01:12,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-01-27 16:01:12,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:12,561 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:01:12,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:01:12,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1691024681, now seen corresponding path program 3 times [2024-01-27 16:01:12,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:01:12,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813304528] [2024-01-27 16:01:12,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:12,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:01:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:01:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:01:12,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:01:12,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813304528] [2024-01-27 16:01:12,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813304528] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:01:12,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598174814] [2024-01-27 16:01:12,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 16:01:12,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:12,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:01:12,711 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) [2024-01-27 16:01:12,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-01-27 16:01:12,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 16:01:12,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:01:12,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 16:01:12,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:01:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:01:12,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:01:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:01:13,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598174814] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:01:13,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:01:13,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-01-27 16:01:13,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832080266] [2024-01-27 16:01:13,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:01:13,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 16:01:13,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:01:13,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 16:01:13,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2024-01-27 16:01:13,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:01:13,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 911 transitions, 25750 flow. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:01:13,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:01:13,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:01:13,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:01:16,674 INFO L124 PetriNetUnfolderBase]: 2419/4839 cut-off events. [2024-01-27 16:01:16,674 INFO L125 PetriNetUnfolderBase]: For 141056/141056 co-relation queries the response was YES. [2024-01-27 16:01:16,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52168 conditions, 4839 events. 2419/4839 cut-off events. For 141056/141056 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 36349 event pairs, 282 based on Foata normal form. 16/4855 useless extension candidates. Maximal degree in co-relation 52023. Up to 1149 conditions per place. [2024-01-27 16:01:16,738 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 508 selfloop transitions, 522 changer transitions 0/1031 dead transitions. [2024-01-27 16:01:16,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 1031 transitions, 29113 flow [2024-01-27 16:01:16,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 16:01:16,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 16:01:16,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 197 transitions. [2024-01-27 16:01:16,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4078674948240166 [2024-01-27 16:01:16,740 INFO L175 Difference]: Start difference. First operand has 523 places, 911 transitions, 25750 flow. Second operand 23 states and 197 transitions. [2024-01-27 16:01:16,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 1031 transitions, 29113 flow [2024-01-27 16:01:18,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 1031 transitions, 28304 flow, removed 206 selfloop flow, removed 28 redundant places. [2024-01-27 16:01:18,341 INFO L231 Difference]: Finished difference. Result has 520 places, 918 transitions, 26183 flow [2024-01-27 16:01:18,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=24992, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=911, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=515, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=26183, PETRI_PLACES=520, PETRI_TRANSITIONS=918} [2024-01-27 16:01:18,342 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 498 predicate places. [2024-01-27 16:01:18,342 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 918 transitions, 26183 flow [2024-01-27 16:01:18,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:01:18,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:01:18,342 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:01:18,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-01-27 16:01:18,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:18,555 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:01:18,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:01:18,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1866006614, now seen corresponding path program 4 times [2024-01-27 16:01:18,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:01:18,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348698719] [2024-01-27 16:01:18,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:18,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:01:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:01:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:01:18,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:01:18,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348698719] [2024-01-27 16:01:18,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348698719] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:01:18,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942016876] [2024-01-27 16:01:18,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 16:01:18,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:18,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:01:18,687 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) [2024-01-27 16:01:18,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-01-27 16:01:18,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 16:01:18,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:01:18,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 16:01:18,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:01:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:01:18,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:01:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:01:18,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942016876] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:01:18,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:01:18,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-01-27 16:01:18,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582104645] [2024-01-27 16:01:18,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:01:18,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 16:01:18,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:01:18,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 16:01:18,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-01-27 16:01:18,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:01:18,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 918 transitions, 26183 flow. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:01:18,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:01:18,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:01:18,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:01:20,970 INFO L124 PetriNetUnfolderBase]: 2414/4799 cut-off events. [2024-01-27 16:01:20,970 INFO L125 PetriNetUnfolderBase]: For 145903/145903 co-relation queries the response was YES. [2024-01-27 16:01:21,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52116 conditions, 4799 events. 2414/4799 cut-off events. For 145903/145903 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 35769 event pairs, 520 based on Foata normal form. 10/4809 useless extension candidates. Maximal degree in co-relation 51969. Up to 1859 conditions per place. [2024-01-27 16:01:21,036 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 694 selfloop transitions, 259 changer transitions 0/954 dead transitions. [2024-01-27 16:01:21,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 954 transitions, 28473 flow [2024-01-27 16:01:21,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 16:01:21,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 16:01:21,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-01-27 16:01:21,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-01-27 16:01:21,038 INFO L175 Difference]: Start difference. First operand has 520 places, 918 transitions, 26183 flow. Second operand 8 states and 87 transitions. [2024-01-27 16:01:21,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 954 transitions, 28473 flow [2024-01-27 16:01:22,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 954 transitions, 27587 flow, removed 24 selfloop flow, removed 14 redundant places. [2024-01-27 16:01:22,717 INFO L231 Difference]: Finished difference. Result has 510 places, 917 transitions, 25786 flow [2024-01-27 16:01:22,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=25268, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=917, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=25786, PETRI_PLACES=510, PETRI_TRANSITIONS=917} [2024-01-27 16:01:22,719 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 488 predicate places. [2024-01-27 16:01:22,719 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 917 transitions, 25786 flow [2024-01-27 16:01:22,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:01:22,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:01:22,719 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:01:22,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-01-27 16:01:22,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-01-27 16:01:22,928 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:01:22,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:01:22,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1301564589, now seen corresponding path program 5 times [2024-01-27 16:01:22,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:01:22,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769764845] [2024-01-27 16:01:22,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:22,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:01:22,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:01:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:01:23,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:01:23,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769764845] [2024-01-27 16:01:23,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769764845] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:01:23,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911185132] [2024-01-27 16:01:23,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 16:01:23,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:23,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:01:23,303 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) [2024-01-27 16:01:23,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-01-27 16:01:23,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 16:01:23,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:01:23,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 55 conjunts are in the unsatisfiable core [2024-01-27 16:01:23,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:01:23,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 16:01:24,362 INFO L349 Elim1Store]: treesize reduction 193, result has 18.6 percent of original size [2024-01-27 16:01:24,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 294 treesize of output 187 [2024-01-27 16:01:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:01:24,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:01:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:01:27,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911185132] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:01:27,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:01:27,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 25 [2024-01-27 16:01:27,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234998200] [2024-01-27 16:01:27,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:01:27,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 16:01:27,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:01:27,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 16:01:27,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2024-01-27 16:01:27,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:01:27,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 917 transitions, 25786 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:01:27,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:01:27,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:01:27,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:01:45,929 WARN L293 SmtUtils]: Spent 17.73s on a formula simplification that was a NOOP. DAG size: 180 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:01:57,445 WARN L293 SmtUtils]: Spent 5.15s on a formula simplification that was a NOOP. DAG size: 203 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:02:04,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:02:29,054 WARN L293 SmtUtils]: Spent 23.06s on a formula simplification. DAG size of input: 204 DAG size of output: 198 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:02:41,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:03:08,016 WARN L293 SmtUtils]: Spent 25.46s on a formula simplification. DAG size of input: 168 DAG size of output: 162 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:03:12,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:03:19,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:03:22,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:03:49,006 WARN L293 SmtUtils]: Spent 26.04s on a formula simplification. DAG size of input: 167 DAG size of output: 161 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:03:53,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:03:57,383 INFO L124 PetriNetUnfolderBase]: 2905/5798 cut-off events. [2024-01-27 16:03:57,383 INFO L125 PetriNetUnfolderBase]: For 170256/170256 co-relation queries the response was YES. [2024-01-27 16:03:57,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62009 conditions, 5798 events. 2905/5798 cut-off events. For 170256/170256 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 45273 event pairs, 87 based on Foata normal form. 16/5814 useless extension candidates. Maximal degree in co-relation 61863. Up to 1409 conditions per place. [2024-01-27 16:03:57,476 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 546 selfloop transitions, 760 changer transitions 11/1318 dead transitions. [2024-01-27 16:03:57,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 1318 transitions, 35186 flow [2024-01-27 16:03:57,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-01-27 16:03:57,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2024-01-27 16:03:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 567 transitions. [2024-01-27 16:03:57,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-01-27 16:03:57,497 INFO L175 Difference]: Start difference. First operand has 510 places, 917 transitions, 25786 flow. Second operand 62 states and 567 transitions. [2024-01-27 16:03:57,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 1318 transitions, 35186 flow [2024-01-27 16:03:59,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 1318 transitions, 34739 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-27 16:03:59,601 INFO L231 Difference]: Finished difference. Result has 582 places, 1113 transitions, 33285 flow [2024-01-27 16:03:59,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=25368, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=916, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=580, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=33285, PETRI_PLACES=582, PETRI_TRANSITIONS=1113} [2024-01-27 16:03:59,602 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 560 predicate places. [2024-01-27 16:03:59,602 INFO L495 AbstractCegarLoop]: Abstraction has has 582 places, 1113 transitions, 33285 flow [2024-01-27 16:03:59,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:03:59,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:03:59,603 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:03:59,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-01-27 16:03:59,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-01-27 16:03:59,807 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:03:59,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:03:59,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2132754805, now seen corresponding path program 6 times [2024-01-27 16:03:59,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:03:59,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967144138] [2024-01-27 16:03:59,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:03:59,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:03:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:04:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:04:00,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:04:00,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967144138] [2024-01-27 16:04:00,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967144138] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:04:00,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98061723] [2024-01-27 16:04:00,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 16:04:00,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:04:00,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:04:00,025 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) [2024-01-27 16:04:00,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-01-27 16:04:00,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 16:04:00,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:04:00,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 16:04:00,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:04:00,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:04:00,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:04:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:04:00,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98061723] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:04:00,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:04:00,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-01-27 16:04:00,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885068209] [2024-01-27 16:04:00,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:04:00,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 16:04:00,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:04:00,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 16:04:00,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2024-01-27 16:04:00,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:04:00,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 1113 transitions, 33285 flow. Second operand has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:04:00,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:04:00,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:04:00,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:04:02,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:04:06,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:04:11,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:04:14,924 INFO L124 PetriNetUnfolderBase]: 2923/5783 cut-off events. [2024-01-27 16:04:14,925 INFO L125 PetriNetUnfolderBase]: For 193581/193581 co-relation queries the response was YES. [2024-01-27 16:04:14,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66285 conditions, 5783 events. 2923/5783 cut-off events. For 193581/193581 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 44514 event pairs, 227 based on Foata normal form. 44/5827 useless extension candidates. Maximal degree in co-relation 66123. Up to 1449 conditions per place. [2024-01-27 16:04:15,007 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 571 selfloop transitions, 737 changer transitions 2/1311 dead transitions. [2024-01-27 16:04:15,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 1311 transitions, 38862 flow [2024-01-27 16:04:15,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-27 16:04:15,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-27 16:04:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 335 transitions. [2024-01-27 16:04:15,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43114543114543114 [2024-01-27 16:04:15,009 INFO L175 Difference]: Start difference. First operand has 582 places, 1113 transitions, 33285 flow. Second operand 37 states and 335 transitions. [2024-01-27 16:04:15,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 1311 transitions, 38862 flow [2024-01-27 16:04:17,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 1311 transitions, 37767 flow, removed 407 selfloop flow, removed 24 redundant places. [2024-01-27 16:04:17,381 INFO L231 Difference]: Finished difference. Result has 598 places, 1160 transitions, 35333 flow [2024-01-27 16:04:17,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=32265, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=688, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=35333, PETRI_PLACES=598, PETRI_TRANSITIONS=1160} [2024-01-27 16:04:17,392 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 576 predicate places. [2024-01-27 16:04:17,392 INFO L495 AbstractCegarLoop]: Abstraction has has 598 places, 1160 transitions, 35333 flow [2024-01-27 16:04:17,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:04:17,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:04:17,393 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:04:17,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-01-27 16:04:17,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-01-27 16:04:17,608 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:04:17,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:04:17,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1495496973, now seen corresponding path program 16 times [2024-01-27 16:04:17,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:04:17,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048860564] [2024-01-27 16:04:17,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:04:17,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:04:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:04:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:04:17,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:04:17,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048860564] [2024-01-27 16:04:17,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048860564] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:04:17,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720224328] [2024-01-27 16:04:17,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 16:04:17,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:04:17,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:04:17,734 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) [2024-01-27 16:04:17,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-01-27 16:04:17,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 16:04:17,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:04:17,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 16:04:17,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:04:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:04:17,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:04:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:04:22,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720224328] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:04:22,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:04:22,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 15 [2024-01-27 16:04:22,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341294461] [2024-01-27 16:04:22,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:04:22,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 16:04:22,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:04:22,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 16:04:22,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=156, Unknown=1, NotChecked=0, Total=210 [2024-01-27 16:04:22,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:04:22,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 1160 transitions, 35333 flow. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:04:22,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:04:22,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:04:22,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:04:30,216 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 18 DAG size of output: 16 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:04:34,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:04:38,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:04:54,596 WARN L293 SmtUtils]: Spent 16.05s on a formula simplification. DAG size of input: 29 DAG size of output: 27 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:04:58,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:05:07,154 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 22 DAG size of output: 21 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:05:11,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:05:15,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:05:17,978 INFO L124 PetriNetUnfolderBase]: 3414/6883 cut-off events. [2024-01-27 16:05:17,978 INFO L125 PetriNetUnfolderBase]: For 235567/235567 co-relation queries the response was YES. [2024-01-27 16:05:18,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78249 conditions, 6883 events. 3414/6883 cut-off events. For 235567/235567 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 55579 event pairs, 516 based on Foata normal form. 24/6907 useless extension candidates. Maximal degree in co-relation 78085. Up to 1829 conditions per place. [2024-01-27 16:05:18,077 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 951 selfloop transitions, 430 changer transitions 0/1382 dead transitions. [2024-01-27 16:05:18,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 1382 transitions, 42833 flow [2024-01-27 16:05:18,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-27 16:05:18,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-27 16:05:18,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 232 transitions. [2024-01-27 16:05:18,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-01-27 16:05:18,078 INFO L175 Difference]: Start difference. First operand has 598 places, 1160 transitions, 35333 flow. Second operand 24 states and 232 transitions. [2024-01-27 16:05:18,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 1382 transitions, 42833 flow [2024-01-27 16:05:20,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 1382 transitions, 41593 flow, removed 185 selfloop flow, removed 16 redundant places. [2024-01-27 16:05:21,066 INFO L231 Difference]: Finished difference. Result has 613 places, 1208 transitions, 36568 flow [2024-01-27 16:05:21,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=34161, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=395, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=757, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=36568, PETRI_PLACES=613, PETRI_TRANSITIONS=1208} [2024-01-27 16:05:21,068 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 591 predicate places. [2024-01-27 16:05:21,068 INFO L495 AbstractCegarLoop]: Abstraction has has 613 places, 1208 transitions, 36568 flow [2024-01-27 16:05:21,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:05:21,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:05:21,069 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:05:21,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-01-27 16:05:21,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-01-27 16:05:21,281 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:05:21,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:05:21,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1746480183, now seen corresponding path program 17 times [2024-01-27 16:05:21,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:05:21,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133912531] [2024-01-27 16:05:21,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:05:21,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:05:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:05:21,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:05:21,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:05:21,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133912531] [2024-01-27 16:05:21,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133912531] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:05:21,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57385425] [2024-01-27 16:05:21,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 16:05:21,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:05:21,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:05:21,365 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) [2024-01-27 16:05:21,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-01-27 16:05:21,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 16:05:21,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:05:21,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 16:05:21,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:05:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:05:21,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:05:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:05:25,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57385425] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:05:25,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:05:25,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2024-01-27 16:05:25,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414770316] [2024-01-27 16:05:25,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:05:25,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 16:05:25,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:05:25,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 16:05:25,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=183, Unknown=1, NotChecked=0, Total=240 [2024-01-27 16:05:25,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:05:25,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 1208 transitions, 36568 flow. Second operand has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:05:25,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:05:25,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:05:25,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:05:30,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:05:34,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:05:38,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:05:42,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:05:46,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:05:49,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:05:50,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:05:54,001 INFO L124 PetriNetUnfolderBase]: 3579/7138 cut-off events. [2024-01-27 16:05:54,002 INFO L125 PetriNetUnfolderBase]: For 244221/244221 co-relation queries the response was YES. [2024-01-27 16:05:54,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81810 conditions, 7138 events. 3579/7138 cut-off events. For 244221/244221 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 57275 event pairs, 730 based on Foata normal form. 2/7140 useless extension candidates. Maximal degree in co-relation 81638. Up to 2282 conditions per place. [2024-01-27 16:05:54,113 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1025 selfloop transitions, 371 changer transitions 8/1405 dead transitions. [2024-01-27 16:05:54,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 1405 transitions, 44076 flow [2024-01-27 16:05:54,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 16:05:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 16:05:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 147 transitions. [2024-01-27 16:05:54,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2024-01-27 16:05:54,114 INFO L175 Difference]: Start difference. First operand has 613 places, 1208 transitions, 36568 flow. Second operand 17 states and 147 transitions. [2024-01-27 16:05:54,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 1405 transitions, 44076 flow [2024-01-27 16:05:58,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 618 places, 1405 transitions, 43590 flow, removed 51 selfloop flow, removed 11 redundant places. [2024-01-27 16:05:58,384 INFO L231 Difference]: Finished difference. Result has 620 places, 1243 transitions, 38189 flow [2024-01-27 16:05:58,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=36098, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=38189, PETRI_PLACES=620, PETRI_TRANSITIONS=1243} [2024-01-27 16:05:58,386 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 598 predicate places. [2024-01-27 16:05:58,386 INFO L495 AbstractCegarLoop]: Abstraction has has 620 places, 1243 transitions, 38189 flow [2024-01-27 16:05:58,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:05:58,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:05:58,387 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:05:58,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-01-27 16:05:58,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:05:58,598 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:05:58,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:05:58,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1766899083, now seen corresponding path program 7 times [2024-01-27 16:05:58,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:05:58,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086850415] [2024-01-27 16:05:58,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:05:58,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:05:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:05:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:05:58,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:05:58,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086850415] [2024-01-27 16:05:58,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086850415] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:05:58,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001655733] [2024-01-27 16:05:58,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 16:05:58,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:05:58,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:05:58,820 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) [2024-01-27 16:05:58,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-01-27 16:05:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:05:59,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-27 16:05:59,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:05:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:05:59,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:05:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:05:59,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001655733] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:05:59,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:05:59,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-01-27 16:05:59,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542855902] [2024-01-27 16:05:59,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:05:59,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 16:05:59,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:05:59,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 16:05:59,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-01-27 16:05:59,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:05:59,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 620 places, 1243 transitions, 38189 flow. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:05:59,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:05:59,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:05:59,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:06:03,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:06:07,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:06:11,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:06:12,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:06:16,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:06:20,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:06:24,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:06:28,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:06:32,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:06:35,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:06:40,577 INFO L124 PetriNetUnfolderBase]: 3676/7328 cut-off events. [2024-01-27 16:06:40,577 INFO L125 PetriNetUnfolderBase]: For 255314/255314 co-relation queries the response was YES. [2024-01-27 16:06:40,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84782 conditions, 7328 events. 3676/7328 cut-off events. For 255314/255314 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 59264 event pairs, 459 based on Foata normal form. 40/7368 useless extension candidates. Maximal degree in co-relation 84607. Up to 2103 conditions per place. [2024-01-27 16:06:40,700 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 747 selfloop transitions, 666 changer transitions 2/1416 dead transitions. [2024-01-27 16:06:40,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 1416 transitions, 43404 flow [2024-01-27 16:06:40,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-01-27 16:06:40,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-01-27 16:06:40,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 291 transitions. [2024-01-27 16:06:40,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2024-01-27 16:06:40,702 INFO L175 Difference]: Start difference. First operand has 620 places, 1243 transitions, 38189 flow. Second operand 33 states and 291 transitions. [2024-01-27 16:06:40,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 1416 transitions, 43404 flow [2024-01-27 16:06:44,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 635 places, 1416 transitions, 42523 flow, removed 63 selfloop flow, removed 12 redundant places. [2024-01-27 16:06:44,314 INFO L231 Difference]: Finished difference. Result has 649 places, 1294 transitions, 41300 flow [2024-01-27 16:06:44,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=37292, PETRI_DIFFERENCE_MINUEND_PLACES=603, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=617, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=41300, PETRI_PLACES=649, PETRI_TRANSITIONS=1294} [2024-01-27 16:06:44,315 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 627 predicate places. [2024-01-27 16:06:44,315 INFO L495 AbstractCegarLoop]: Abstraction has has 649 places, 1294 transitions, 41300 flow [2024-01-27 16:06:44,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:06:44,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:06:44,319 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:06:44,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-01-27 16:06:44,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-01-27 16:06:44,522 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:06:44,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:06:44,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1628203732, now seen corresponding path program 12 times [2024-01-27 16:06:44,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:06:44,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283826470] [2024-01-27 16:06:44,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:06:44,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:06:44,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:06:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:06:44,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:06:44,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283826470] [2024-01-27 16:06:44,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283826470] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:06:44,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325473886] [2024-01-27 16:06:44,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 16:06:44,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:06:44,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:06:44,637 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) [2024-01-27 16:06:44,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-01-27 16:06:44,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 16:06:44,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:06:44,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-27 16:06:44,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:06:44,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:06:44,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:06:45,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:06:45,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325473886] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:06:45,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:06:45,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-01-27 16:06:45,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402491653] [2024-01-27 16:06:45,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:06:45,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 16:06:45,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:06:45,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 16:06:45,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-01-27 16:06:45,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:06:45,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 649 places, 1294 transitions, 41300 flow. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:06:45,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:06:45,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:06:45,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:06:47,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:06:49,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:06:53,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:06:56,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:07:00,073 INFO L124 PetriNetUnfolderBase]: 3828/7594 cut-off events. [2024-01-27 16:07:00,073 INFO L125 PetriNetUnfolderBase]: For 296837/296837 co-relation queries the response was YES. [2024-01-27 16:07:00,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90116 conditions, 7594 events. 3828/7594 cut-off events. For 296837/296837 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 61641 event pairs, 523 based on Foata normal form. 64/7658 useless extension candidates. Maximal degree in co-relation 89932. Up to 2245 conditions per place. [2024-01-27 16:07:00,232 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 829 selfloop transitions, 658 changer transitions 2/1490 dead transitions. [2024-01-27 16:07:00,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 685 places, 1490 transitions, 47007 flow [2024-01-27 16:07:00,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-27 16:07:00,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-27 16:07:00,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 349 transitions. [2024-01-27 16:07:00,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43734335839599 [2024-01-27 16:07:00,233 INFO L175 Difference]: Start difference. First operand has 649 places, 1294 transitions, 41300 flow. Second operand 38 states and 349 transitions. [2024-01-27 16:07:00,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 685 places, 1490 transitions, 47007 flow [2024-01-27 16:07:05,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 671 places, 1490 transitions, 46547 flow, removed 120 selfloop flow, removed 14 redundant places. [2024-01-27 16:07:05,533 INFO L231 Difference]: Finished difference. Result has 682 places, 1356 transitions, 44800 flow [2024-01-27 16:07:05,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40692, PETRI_DIFFERENCE_MINUEND_PLACES=634, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=600, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=44800, PETRI_PLACES=682, PETRI_TRANSITIONS=1356} [2024-01-27 16:07:05,534 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 660 predicate places. [2024-01-27 16:07:05,535 INFO L495 AbstractCegarLoop]: Abstraction has has 682 places, 1356 transitions, 44800 flow [2024-01-27 16:07:05,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:07:05,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:07:05,535 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:07:05,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-01-27 16:07:05,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:07:05,747 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:07:05,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:07:05,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1570805867, now seen corresponding path program 8 times [2024-01-27 16:07:05,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:07:05,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472511750] [2024-01-27 16:07:05,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:07:05,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:07:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:07:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:07:05,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:07:05,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472511750] [2024-01-27 16:07:05,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472511750] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:07:05,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592610398] [2024-01-27 16:07:05,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 16:07:05,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:07:05,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:07:05,903 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) [2024-01-27 16:07:05,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-01-27 16:07:06,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 16:07:06,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:07:06,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 16:07:06,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:07:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:07:06,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:07:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:07:06,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592610398] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:07:06,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:07:06,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-27 16:07:06,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50702168] [2024-01-27 16:07:06,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:07:06,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 16:07:06,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:07:06,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 16:07:06,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2024-01-27 16:07:06,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:07:06,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 682 places, 1356 transitions, 44800 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:07:06,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:07:06,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:07:06,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:07:14,167 INFO L124 PetriNetUnfolderBase]: 4118/8127 cut-off events. [2024-01-27 16:07:14,167 INFO L125 PetriNetUnfolderBase]: For 349495/349495 co-relation queries the response was YES. [2024-01-27 16:07:14,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99965 conditions, 8127 events. 4118/8127 cut-off events. For 349495/349495 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 66492 event pairs, 518 based on Foata normal form. 24/8151 useless extension candidates. Maximal degree in co-relation 99771. Up to 2968 conditions per place. [2024-01-27 16:07:14,310 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 849 selfloop transitions, 756 changer transitions 0/1606 dead transitions. [2024-01-27 16:07:14,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 720 places, 1606 transitions, 53224 flow [2024-01-27 16:07:14,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-01-27 16:07:14,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-01-27 16:07:14,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 357 transitions. [2024-01-27 16:07:14,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2024-01-27 16:07:14,312 INFO L175 Difference]: Start difference. First operand has 682 places, 1356 transitions, 44800 flow. Second operand 39 states and 357 transitions. [2024-01-27 16:07:14,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 720 places, 1606 transitions, 53224 flow [2024-01-27 16:07:19,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 703 places, 1606 transitions, 52155 flow, removed 271 selfloop flow, removed 17 redundant places. [2024-01-27 16:07:19,707 INFO L231 Difference]: Finished difference. Result has 713 places, 1466 transitions, 50228 flow [2024-01-27 16:07:19,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=43698, PETRI_DIFFERENCE_MINUEND_PLACES=665, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=649, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=50228, PETRI_PLACES=713, PETRI_TRANSITIONS=1466} [2024-01-27 16:07:19,709 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 691 predicate places. [2024-01-27 16:07:19,709 INFO L495 AbstractCegarLoop]: Abstraction has has 713 places, 1466 transitions, 50228 flow [2024-01-27 16:07:19,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:07:19,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:07:19,709 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:07:19,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-01-27 16:07:19,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:07:19,921 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:07:19,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:07:19,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1088727, now seen corresponding path program 9 times [2024-01-27 16:07:19,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:07:19,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768281842] [2024-01-27 16:07:19,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:07:19,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:07:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:07:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:07:20,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:07:20,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768281842] [2024-01-27 16:07:20,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768281842] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:07:20,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532660294] [2024-01-27 16:07:20,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 16:07:20,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:07:20,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:07:20,074 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) [2024-01-27 16:07:20,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-01-27 16:07:20,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 16:07:20,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:07:20,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 16:07:20,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:07:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:07:20,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:07:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:07:20,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532660294] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:07:20,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:07:20,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-27 16:07:20,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98896555] [2024-01-27 16:07:20,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:07:20,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 16:07:20,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:07:20,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 16:07:20,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-01-27 16:07:20,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:07:20,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 713 places, 1466 transitions, 50228 flow. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:07:20,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:07:20,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:07:20,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:07:26,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:07:30,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:07:35,132 INFO L124 PetriNetUnfolderBase]: 4174/8201 cut-off events. [2024-01-27 16:07:35,133 INFO L125 PetriNetUnfolderBase]: For 378944/378944 co-relation queries the response was YES. [2024-01-27 16:07:35,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103346 conditions, 8201 events. 4174/8201 cut-off events. For 378944/378944 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 66809 event pairs, 700 based on Foata normal form. 6/8207 useless extension candidates. Maximal degree in co-relation 103144. Up to 2394 conditions per place. [2024-01-27 16:07:35,362 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 1010 selfloop transitions, 644 changer transitions 0/1655 dead transitions. [2024-01-27 16:07:35,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 746 places, 1655 transitions, 57316 flow [2024-01-27 16:07:35,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-27 16:07:35,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-27 16:07:35,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 286 transitions. [2024-01-27 16:07:35,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005602240896359 [2024-01-27 16:07:35,364 INFO L175 Difference]: Start difference. First operand has 713 places, 1466 transitions, 50228 flow. Second operand 34 states and 286 transitions. [2024-01-27 16:07:35,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 746 places, 1655 transitions, 57316 flow [2024-01-27 16:07:41,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 727 places, 1655 transitions, 56385 flow, removed 225 selfloop flow, removed 19 redundant places. [2024-01-27 16:07:41,386 INFO L231 Difference]: Finished difference. Result has 732 places, 1510 transitions, 52288 flow [2024-01-27 16:07:41,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=49282, PETRI_DIFFERENCE_MINUEND_PLACES=694, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=599, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=835, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=52288, PETRI_PLACES=732, PETRI_TRANSITIONS=1510} [2024-01-27 16:07:41,388 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 710 predicate places. [2024-01-27 16:07:41,388 INFO L495 AbstractCegarLoop]: Abstraction has has 732 places, 1510 transitions, 52288 flow [2024-01-27 16:07:41,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:07:41,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:07:41,388 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:07:41,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-01-27 16:07:41,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-01-27 16:07:41,600 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:07:41,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:07:41,601 INFO L85 PathProgramCache]: Analyzing trace with hash 872651953, now seen corresponding path program 10 times [2024-01-27 16:07:41,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:07:41,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151832922] [2024-01-27 16:07:41,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:07:41,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:07:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:07:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:07:41,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:07:41,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151832922] [2024-01-27 16:07:41,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151832922] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:07:41,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829855763] [2024-01-27 16:07:41,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 16:07:41,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:07:41,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:07:41,751 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) [2024-01-27 16:07:41,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-01-27 16:07:41,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 16:07:41,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:07:41,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-27 16:07:41,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:07:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:07:42,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:07:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:07:42,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829855763] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:07:42,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:07:42,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-27 16:07:42,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576723851] [2024-01-27 16:07:42,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:07:42,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 16:07:42,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:07:42,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 16:07:42,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2024-01-27 16:07:42,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:07:42,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 732 places, 1510 transitions, 52288 flow. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:07:42,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:07:42,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:07:42,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:07:44,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:07:50,777 WARN L293 SmtUtils]: Spent 5.41s on a formula simplification. DAG size of input: 42 DAG size of output: 42 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:08:03,523 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 35 DAG size of output: 34 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:08:10,220 INFO L124 PetriNetUnfolderBase]: 4173/8183 cut-off events. [2024-01-27 16:08:10,221 INFO L125 PetriNetUnfolderBase]: For 380860/380860 co-relation queries the response was YES. [2024-01-27 16:08:10,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103858 conditions, 8183 events. 4173/8183 cut-off events. For 380860/380860 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 66538 event pairs, 535 based on Foata normal form. 8/8191 useless extension candidates. Maximal degree in co-relation 103654. Up to 3045 conditions per place. [2024-01-27 16:08:10,370 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 838 selfloop transitions, 785 changer transitions 0/1624 dead transitions. [2024-01-27 16:08:10,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 766 places, 1624 transitions, 56446 flow [2024-01-27 16:08:10,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-01-27 16:08:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-01-27 16:08:10,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 326 transitions. [2024-01-27 16:08:10,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-01-27 16:08:10,371 INFO L175 Difference]: Start difference. First operand has 732 places, 1510 transitions, 52288 flow. Second operand 36 states and 326 transitions. [2024-01-27 16:08:10,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 766 places, 1624 transitions, 56446 flow [2024-01-27 16:08:16,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 741 places, 1624 transitions, 55964 flow, removed 95 selfloop flow, removed 25 redundant places. [2024-01-27 16:08:16,548 INFO L231 Difference]: Finished difference. Result has 742 places, 1516 transitions, 53717 flow [2024-01-27 16:08:16,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=51714, PETRI_DIFFERENCE_MINUEND_PLACES=706, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=776, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=53717, PETRI_PLACES=742, PETRI_TRANSITIONS=1516} [2024-01-27 16:08:16,549 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 720 predicate places. [2024-01-27 16:08:16,549 INFO L495 AbstractCegarLoop]: Abstraction has has 742 places, 1516 transitions, 53717 flow [2024-01-27 16:08:16,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:08:16,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:08:16,550 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:08:16,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-01-27 16:08:16,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-01-27 16:08:16,760 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:08:16,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:08:16,760 INFO L85 PathProgramCache]: Analyzing trace with hash -47801643, now seen corresponding path program 11 times [2024-01-27 16:08:16,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:08:16,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964262100] [2024-01-27 16:08:16,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:08:16,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:08:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:08:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:08:16,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:08:16,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964262100] [2024-01-27 16:08:16,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964262100] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:08:16,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6779267] [2024-01-27 16:08:16,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 16:08:16,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:08:16,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:08:16,915 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) [2024-01-27 16:08:16,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-01-27 16:08:17,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 16:08:17,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:08:17,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 16:08:17,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:08:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:08:17,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:08:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:08:17,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6779267] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:08:17,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:08:17,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-27 16:08:17,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152595181] [2024-01-27 16:08:17,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:08:17,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 16:08:17,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:08:17,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 16:08:17,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2024-01-27 16:08:17,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:08:17,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 742 places, 1516 transitions, 53717 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:08:17,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:08:17,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:08:17,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:08:20,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:08:23,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:08:27,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:08:33,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:08:37,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:08:42,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:08:46,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:08:52,524 INFO L124 PetriNetUnfolderBase]: 4469/8746 cut-off events. [2024-01-27 16:08:52,525 INFO L125 PetriNetUnfolderBase]: For 425280/425280 co-relation queries the response was YES. [2024-01-27 16:08:52,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113591 conditions, 8746 events. 4469/8746 cut-off events. For 425280/425280 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 71873 event pairs, 574 based on Foata normal form. 52/8798 useless extension candidates. Maximal degree in co-relation 113391. Up to 3068 conditions per place. [2024-01-27 16:08:52,697 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 819 selfloop transitions, 998 changer transitions 0/1818 dead transitions. [2024-01-27 16:08:52,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 790 places, 1818 transitions, 62915 flow [2024-01-27 16:08:52,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-01-27 16:08:52,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-01-27 16:08:52,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 444 transitions. [2024-01-27 16:08:52,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314868804664723 [2024-01-27 16:08:52,699 INFO L175 Difference]: Start difference. First operand has 742 places, 1516 transitions, 53717 flow. Second operand 49 states and 444 transitions. [2024-01-27 16:08:52,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 790 places, 1818 transitions, 62915 flow [2024-01-27 16:08:59,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 767 places, 1818 transitions, 62185 flow, removed 23 selfloop flow, removed 23 redundant places. [2024-01-27 16:08:59,915 INFO L231 Difference]: Finished difference. Result has 782 places, 1655 transitions, 61094 flow [2024-01-27 16:08:59,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=52828, PETRI_DIFFERENCE_MINUEND_PLACES=719, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=872, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=61094, PETRI_PLACES=782, PETRI_TRANSITIONS=1655} [2024-01-27 16:08:59,917 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 760 predicate places. [2024-01-27 16:08:59,917 INFO L495 AbstractCegarLoop]: Abstraction has has 782 places, 1655 transitions, 61094 flow [2024-01-27 16:08:59,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:08:59,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:08:59,917 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:08:59,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-01-27 16:09:00,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-01-27 16:09:00,129 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:09:00,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:09:00,129 INFO L85 PathProgramCache]: Analyzing trace with hash 146130741, now seen corresponding path program 18 times [2024-01-27 16:09:00,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:09:00,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733641372] [2024-01-27 16:09:00,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:09:00,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:09:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:09:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:09:00,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:09:00,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733641372] [2024-01-27 16:09:00,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733641372] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:09:00,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118430875] [2024-01-27 16:09:00,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 16:09:00,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:09:00,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:09:00,239 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) [2024-01-27 16:09:00,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-01-27 16:09:00,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 16:09:00,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:09:00,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 16:09:00,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:09:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:09:00,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:09:00,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:09:00,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118430875] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:09:00,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:09:00,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-01-27 16:09:00,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067819311] [2024-01-27 16:09:00,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:09:00,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 16:09:00,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:09:00,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 16:09:00,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-01-27 16:09:00,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:09:00,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 782 places, 1655 transitions, 61094 flow. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:09:00,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:09:00,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:09:00,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:09:10,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:09:34,180 WARN L293 SmtUtils]: Spent 20.06s on a formula simplification. DAG size of input: 35 DAG size of output: 32 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:09:42,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:09:46,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:09:50,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:09:55,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:10:01,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:10:05,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:10:09,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:10:13,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:10:17,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:10:21,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:10:25,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:10:29,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:10:33,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:10:37,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:10:41,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:10:44,159 INFO L124 PetriNetUnfolderBase]: 4551/8930 cut-off events. [2024-01-27 16:10:44,159 INFO L125 PetriNetUnfolderBase]: For 471910/471910 co-relation queries the response was YES. [2024-01-27 16:10:44,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120061 conditions, 8930 events. 4551/8930 cut-off events. For 471910/471910 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 73829 event pairs, 804 based on Foata normal form. 16/8946 useless extension candidates. Maximal degree in co-relation 119846. Up to 4978 conditions per place. [2024-01-27 16:10:44,342 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 1145 selfloop transitions, 645 changer transitions 1/1792 dead transitions. [2024-01-27 16:10:44,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 807 places, 1792 transitions, 67031 flow [2024-01-27 16:10:44,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 16:10:44,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 16:10:44,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 250 transitions. [2024-01-27 16:10:44,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409171075837742 [2024-01-27 16:10:44,343 INFO L175 Difference]: Start difference. First operand has 782 places, 1655 transitions, 61094 flow. Second operand 27 states and 250 transitions. [2024-01-27 16:10:44,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 807 places, 1792 transitions, 67031 flow [2024-01-27 16:10:52,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 789 places, 1792 transitions, 65923 flow, removed 359 selfloop flow, removed 18 redundant places. [2024-01-27 16:10:52,819 INFO L231 Difference]: Finished difference. Result has 798 places, 1706 transitions, 63843 flow [2024-01-27 16:10:52,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=59834, PETRI_DIFFERENCE_MINUEND_PLACES=763, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=598, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1035, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=63843, PETRI_PLACES=798, PETRI_TRANSITIONS=1706} [2024-01-27 16:10:52,821 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 776 predicate places. [2024-01-27 16:10:52,821 INFO L495 AbstractCegarLoop]: Abstraction has has 798 places, 1706 transitions, 63843 flow [2024-01-27 16:10:52,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:10:52,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:10:52,825 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:10:52,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-01-27 16:10:53,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-01-27 16:10:53,036 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:10:53,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:10:53,037 INFO L85 PathProgramCache]: Analyzing trace with hash -963704280, now seen corresponding path program 13 times [2024-01-27 16:10:53,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:10:53,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575480477] [2024-01-27 16:10:53,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:10:53,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:10:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:10:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:10:53,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:10:53,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575480477] [2024-01-27 16:10:53,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575480477] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:10:53,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247730752] [2024-01-27 16:10:53,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 16:10:53,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:10:53,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:10:53,164 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) [2024-01-27 16:10:53,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-01-27 16:10:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:10:53,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 16:10:53,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:10:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:10:53,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:10:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:10:53,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247730752] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:10:53,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:10:53,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-01-27 16:10:53,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230830505] [2024-01-27 16:10:53,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:10:53,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 16:10:53,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:10:53,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 16:10:53,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2024-01-27 16:10:53,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:10:53,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 798 places, 1706 transitions, 63843 flow. Second operand has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 19 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:10:53,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:10:53,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:10:53,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:11:01,900 INFO L124 PetriNetUnfolderBase]: 4832/9376 cut-off events. [2024-01-27 16:11:01,900 INFO L125 PetriNetUnfolderBase]: For 530884/530884 co-relation queries the response was YES. [2024-01-27 16:11:02,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128927 conditions, 9376 events. 4832/9376 cut-off events. For 530884/530884 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 77314 event pairs, 65 based on Foata normal form. 32/9408 useless extension candidates. Maximal degree in co-relation 128705. Up to 2153 conditions per place. [2024-01-27 16:11:02,100 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 669 selfloop transitions, 1340 changer transitions 1/2011 dead transitions. [2024-01-27 16:11:02,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 2011 transitions, 75845 flow [2024-01-27 16:11:02,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-27 16:11:02,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-27 16:11:02,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 301 transitions. [2024-01-27 16:11:02,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4942528735632184 [2024-01-27 16:11:02,102 INFO L175 Difference]: Start difference. First operand has 798 places, 1706 transitions, 63843 flow. Second operand 29 states and 301 transitions. [2024-01-27 16:11:02,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 2011 transitions, 75845 flow [2024-01-27 16:11:11,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 813 places, 2011 transitions, 75222 flow, removed 146 selfloop flow, removed 12 redundant places. [2024-01-27 16:11:11,585 INFO L231 Difference]: Finished difference. Result has 817 places, 1806 transitions, 70087 flow [2024-01-27 16:11:11,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=62917, PETRI_DIFFERENCE_MINUEND_PLACES=785, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=70087, PETRI_PLACES=817, PETRI_TRANSITIONS=1806} [2024-01-27 16:11:11,587 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 795 predicate places. [2024-01-27 16:11:11,587 INFO L495 AbstractCegarLoop]: Abstraction has has 817 places, 1806 transitions, 70087 flow [2024-01-27 16:11:11,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 19 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:11:11,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:11:11,587 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:11:11,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-01-27 16:11:11,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:11:11,799 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:11:11,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:11:11,800 INFO L85 PathProgramCache]: Analyzing trace with hash -263345245, now seen corresponding path program 19 times [2024-01-27 16:11:11,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:11:11,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917093266] [2024-01-27 16:11:11,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:11:11,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:11:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:11:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:11:11,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:11:11,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917093266] [2024-01-27 16:11:11,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917093266] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:11:11,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677640483] [2024-01-27 16:11:11,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 16:11:11,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:11:11,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:11:11,883 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) [2024-01-27 16:11:11,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-01-27 16:11:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:11:12,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 16:11:12,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:11:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:11:12,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:11:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:11:13,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677640483] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:11:13,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:11:13,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-27 16:11:13,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432184455] [2024-01-27 16:11:13,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:11:13,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 16:11:13,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:11:13,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 16:11:13,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-01-27 16:11:13,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:11:13,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 817 places, 1806 transitions, 70087 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:11:13,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:11:13,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:11:13,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:11:19,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:11:25,419 INFO L124 PetriNetUnfolderBase]: 4875/9484 cut-off events. [2024-01-27 16:11:25,419 INFO L125 PetriNetUnfolderBase]: For 552275/552275 co-relation queries the response was YES. [2024-01-27 16:11:25,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134329 conditions, 9484 events. 4875/9484 cut-off events. For 552275/552275 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 78332 event pairs, 1197 based on Foata normal form. 4/9488 useless extension candidates. Maximal degree in co-relation 134104. Up to 5185 conditions per place. [2024-01-27 16:11:25,628 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1590 selfloop transitions, 331 changer transitions 10/1932 dead transitions. [2024-01-27 16:11:25,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 832 places, 1932 transitions, 77124 flow [2024-01-27 16:11:25,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 16:11:25,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 16:11:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 126 transitions. [2024-01-27 16:11:25,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-01-27 16:11:25,630 INFO L175 Difference]: Start difference. First operand has 817 places, 1806 transitions, 70087 flow. Second operand 16 states and 126 transitions. [2024-01-27 16:11:25,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 832 places, 1932 transitions, 77124 flow [2024-01-27 16:11:36,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 821 places, 1932 transitions, 75709 flow, removed 306 selfloop flow, removed 11 redundant places. [2024-01-27 16:11:36,348 INFO L231 Difference]: Finished difference. Result has 823 places, 1799 transitions, 69562 flow [2024-01-27 16:11:36,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=68755, PETRI_DIFFERENCE_MINUEND_PLACES=806, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=69562, PETRI_PLACES=823, PETRI_TRANSITIONS=1799} [2024-01-27 16:11:36,350 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 801 predicate places. [2024-01-27 16:11:36,350 INFO L495 AbstractCegarLoop]: Abstraction has has 823 places, 1799 transitions, 69562 flow [2024-01-27 16:11:36,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:11:36,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:11:36,355 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:11:36,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-01-27 16:11:36,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-01-27 16:11:36,568 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:11:36,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:11:36,568 INFO L85 PathProgramCache]: Analyzing trace with hash -411733975, now seen corresponding path program 12 times [2024-01-27 16:11:36,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:11:36,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106885320] [2024-01-27 16:11:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:11:36,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:11:36,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:11:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:11:36,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:11:36,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106885320] [2024-01-27 16:11:36,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106885320] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:11:36,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876654211] [2024-01-27 16:11:36,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 16:11:36,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:11:36,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:11:36,757 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) [2024-01-27 16:11:36,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-01-27 16:11:37,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 16:11:37,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:11:37,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 16:11:37,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:11:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:11:37,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:11:37,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:11:37,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876654211] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:11:37,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:11:37,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-27 16:11:37,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82957216] [2024-01-27 16:11:37,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:11:37,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 16:11:37,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:11:37,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 16:11:37,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-01-27 16:11:37,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:11:37,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 823 places, 1799 transitions, 69562 flow. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:11:37,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:11:37,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:11:37,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:11:43,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:11:50,139 INFO L124 PetriNetUnfolderBase]: 5045/9724 cut-off events. [2024-01-27 16:11:50,140 INFO L125 PetriNetUnfolderBase]: For 579560/579560 co-relation queries the response was YES. [2024-01-27 16:11:50,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138769 conditions, 9724 events. 5045/9724 cut-off events. For 579560/579560 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 80137 event pairs, 580 based on Foata normal form. 6/9730 useless extension candidates. Maximal degree in co-relation 138544. Up to 3482 conditions per place. [2024-01-27 16:11:50,445 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1072 selfloop transitions, 1041 changer transitions 1/2115 dead transitions. [2024-01-27 16:11:50,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 852 places, 2115 transitions, 82832 flow [2024-01-27 16:11:50,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-27 16:11:50,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-27 16:11:50,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 293 transitions. [2024-01-27 16:11:50,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3770913770913771 [2024-01-27 16:11:50,454 INFO L175 Difference]: Start difference. First operand has 823 places, 1799 transitions, 69562 flow. Second operand 37 states and 293 transitions. [2024-01-27 16:11:50,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 852 places, 2115 transitions, 82832 flow [2024-01-27 16:12:01,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 842 places, 2115 transitions, 82625 flow, removed 48 selfloop flow, removed 10 redundant places. [2024-01-27 16:12:01,747 INFO L231 Difference]: Finished difference. Result has 850 places, 1937 transitions, 78054 flow [2024-01-27 16:12:01,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=69316, PETRI_DIFFERENCE_MINUEND_PLACES=806, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=902, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=836, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=78054, PETRI_PLACES=850, PETRI_TRANSITIONS=1937} [2024-01-27 16:12:01,748 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 828 predicate places. [2024-01-27 16:12:01,749 INFO L495 AbstractCegarLoop]: Abstraction has has 850 places, 1937 transitions, 78054 flow [2024-01-27 16:12:01,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:12:01,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:12:01,749 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:12:01,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-01-27 16:12:01,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:12:01,961 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:12:01,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:12:01,962 INFO L85 PathProgramCache]: Analyzing trace with hash -408445783, now seen corresponding path program 13 times [2024-01-27 16:12:01,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:12:01,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9870103] [2024-01-27 16:12:01,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:12:01,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:12:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:12:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:12:02,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:12:02,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9870103] [2024-01-27 16:12:02,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9870103] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:12:02,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802673263] [2024-01-27 16:12:02,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 16:12:02,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:12:02,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:12:02,136 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) [2024-01-27 16:12:02,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-01-27 16:12:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:12:02,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 16:12:02,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:12:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:12:02,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:12:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:12:02,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802673263] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:12:02,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:12:02,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-27 16:12:02,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625712351] [2024-01-27 16:12:02,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:12:02,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 16:12:02,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:12:02,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 16:12:02,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-01-27 16:12:02,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:12:02,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 850 places, 1937 transitions, 78054 flow. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:12:02,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:12:02,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:12:02,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:12:07,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:12:11,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:12:15,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] Killed by 15