./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-easy1.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/test-easy1.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 935a7b7fee114f90b65d69dd73b2635844dd9aedca06c4cbc37a4ce046611c9d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:55:00,679 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:55:00,714 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:55:00,717 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:55:00,717 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:55:00,744 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:55:00,745 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:55:00,745 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:55:00,745 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:55:00,745 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:55:00,746 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:55:00,746 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:55:00,746 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:55:00,746 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:55:00,747 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:55:00,747 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:55:00,747 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:55:00,749 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:55:00,749 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:55:00,749 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:55:00,749 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:55:00,751 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:55:00,751 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:55:00,752 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:55:00,752 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:55:00,752 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:55:00,752 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:55:00,753 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:55:00,753 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:55:00,753 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:55:00,753 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:55:00,753 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:55:00,754 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:55:00,754 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:55:00,754 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:55:00,754 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:55:00,754 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:55:00,755 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:55:00,755 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:55:00,755 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:55:00,755 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:55:00,755 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:55:00,755 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:55:00,756 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 935a7b7fee114f90b65d69dd73b2635844dd9aedca06c4cbc37a4ce046611c9d [2024-01-27 15:55:00,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:55:00,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:55:00,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:55:00,971 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:55:00,971 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:55:00,972 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy1.wvr.c [2024-01-27 15:55:01,977 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:55:02,125 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:55:02,125 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy1.wvr.c [2024-01-27 15:55:02,130 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/960a1f180/c1029dde4f9e41a589bed8edcf2d25ec/FLAG31f4a93e2 [2024-01-27 15:55:02,139 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/960a1f180/c1029dde4f9e41a589bed8edcf2d25ec [2024-01-27 15:55:02,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:55:02,142 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:55:02,143 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:55:02,143 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:55:02,146 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:55:02,146 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:55:02" (1/1) ... [2024-01-27 15:55:02,147 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68682d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:55:02, skipping insertion in model container [2024-01-27 15:55:02,147 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:55:02" (1/1) ... [2024-01-27 15:55:02,162 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:55:02,268 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/test-easy1.wvr.c[1902,1915] [2024-01-27 15:55:02,272 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:55:02,278 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:55:02,290 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/test-easy1.wvr.c[1902,1915] [2024-01-27 15:55:02,291 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:55:02,301 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:55:02,301 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:55:02 WrapperNode [2024-01-27 15:55:02,302 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:55:02,302 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:55:02,302 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:55:02,303 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:55:02,307 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:55:02" (1/1) ... [2024-01-27 15:55:02,314 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:55:02" (1/1) ... [2024-01-27 15:55:02,327 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2024-01-27 15:55:02,327 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:55:02,327 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:55:02,327 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:55:02,328 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:55:02,335 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:55:02" (1/1) ... [2024-01-27 15:55:02,335 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:55:02" (1/1) ... [2024-01-27 15:55:02,336 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:55:02" (1/1) ... [2024-01-27 15:55:02,355 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-27 15:55:02,355 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:55:02" (1/1) ... [2024-01-27 15:55:02,355 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:55:02" (1/1) ... [2024-01-27 15:55:02,358 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:55:02" (1/1) ... [2024-01-27 15:55:02,360 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:55:02" (1/1) ... [2024-01-27 15:55:02,368 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:55:02" (1/1) ... [2024-01-27 15:55:02,369 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:55:02" (1/1) ... [2024-01-27 15:55:02,371 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:55:02,371 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:55:02,371 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:55:02,371 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:55:02,372 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:55:02" (1/1) ... [2024-01-27 15:55:02,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:55:02,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:02,405 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 15:55:02,427 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 15:55:02,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:55:02,463 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:55:02,463 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:55:02,463 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:55:02,463 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:55:02,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:55:02,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:55:02,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:55:02,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:55:02,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:55:02,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:55:02,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:55:02,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:55:02,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:55:02,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:55:02,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:55:02,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:55:02,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:55:02,468 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 15:55:02,557 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:55:02,559 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:55:02,717 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:55:02,718 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:55:02,821 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:55:02,821 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-27 15:55:02,822 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:55:02 BoogieIcfgContainer [2024-01-27 15:55:02,822 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:55:02,823 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:55:02,823 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:55:02,825 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:55:02,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:55:02" (1/3) ... [2024-01-27 15:55:02,826 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5442a953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:55:02, skipping insertion in model container [2024-01-27 15:55:02,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:55:02" (2/3) ... [2024-01-27 15:55:02,826 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5442a953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:55:02, skipping insertion in model container [2024-01-27 15:55:02,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:55:02" (3/3) ... [2024-01-27 15:55:02,827 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2024-01-27 15:55:02,833 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:55:02,839 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:55:02,839 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:55:02,839 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:55:02,864 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:55:02,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 19 transitions, 52 flow [2024-01-27 15:55:02,905 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-01-27 15:55:02,905 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:55:02,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 17 events. 2/17 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-01-27 15:55:02,907 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 19 transitions, 52 flow [2024-01-27 15:55:02,909 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 16 transitions, 44 flow [2024-01-27 15:55:02,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:55:02,921 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;@62f06733, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:55:02,921 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:55:02,927 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:55:02,927 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2024-01-27 15:55:02,927 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:55:02,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:02,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:02,935 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 15:55:02,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:02,939 INFO L85 PathProgramCache]: Analyzing trace with hash 2017814367, now seen corresponding path program 1 times [2024-01-27 15:55:02,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:02,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22048183] [2024-01-27 15:55:02,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:02,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:03,210 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 15:55:03,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:03,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22048183] [2024-01-27 15:55:03,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22048183] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:55:03,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:55:03,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:55:03,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101271414] [2024-01-27 15:55:03,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:55:03,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:55:03,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:03,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:55:03,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:55:03,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:03,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 15:55:03,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:03,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:03,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:03,330 INFO L124 PetriNetUnfolderBase]: 65/115 cut-off events. [2024-01-27 15:55:03,330 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-01-27 15:55:03,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 115 events. 65/115 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 310 event pairs, 9 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2024-01-27 15:55:03,335 INFO L140 encePairwiseOnDemand]: 15/19 looper letters, 19 selfloop transitions, 3 changer transitions 1/26 dead transitions. [2024-01-27 15:55:03,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 26 transitions, 119 flow [2024-01-27 15:55:03,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:55:03,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:55:03,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 39 transitions. [2024-01-27 15:55:03,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6842105263157895 [2024-01-27 15:55:03,347 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 44 flow. Second operand 3 states and 39 transitions. [2024-01-27 15:55:03,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 26 transitions, 119 flow [2024-01-27 15:55:03,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 26 transitions, 105 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:55:03,353 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 55 flow [2024-01-27 15:55:03,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2024-01-27 15:55:03,357 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-01-27 15:55:03,358 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 55 flow [2024-01-27 15:55:03,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 15:55:03,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:03,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:03,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:55:03,359 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 15:55:03,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:03,360 INFO L85 PathProgramCache]: Analyzing trace with hash -996748784, now seen corresponding path program 1 times [2024-01-27 15:55:03,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:03,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335739147] [2024-01-27 15:55:03,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:03,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:03,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:03,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335739147] [2024-01-27 15:55:03,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335739147] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:55:03,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:55:03,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:55:03,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665649072] [2024-01-27 15:55:03,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:55:03,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:55:03,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:03,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:55:03,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:55:03,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:03,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 55 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 15:55:03,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:03,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:03,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:03,562 INFO L124 PetriNetUnfolderBase]: 70/133 cut-off events. [2024-01-27 15:55:03,562 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-01-27 15:55:03,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 133 events. 70/133 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 391 event pairs, 9 based on Foata normal form. 4/137 useless extension candidates. Maximal degree in co-relation 121. Up to 68 conditions per place. [2024-01-27 15:55:03,565 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 27 selfloop transitions, 7 changer transitions 0/37 dead transitions. [2024-01-27 15:55:03,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 37 transitions, 177 flow [2024-01-27 15:55:03,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:55:03,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:55:03,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2024-01-27 15:55:03,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-01-27 15:55:03,568 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 55 flow. Second operand 5 states and 57 transitions. [2024-01-27 15:55:03,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 37 transitions, 177 flow [2024-01-27 15:55:03,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 37 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:55:03,572 INFO L231 Difference]: Finished difference. Result has 26 places, 24 transitions, 108 flow [2024-01-27 15:55:03,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=26, PETRI_TRANSITIONS=24} [2024-01-27 15:55:03,573 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2024-01-27 15:55:03,573 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 24 transitions, 108 flow [2024-01-27 15:55:03,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 15:55:03,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:03,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:03,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:55:03,574 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 15:55:03,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:03,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1836770002, now seen corresponding path program 2 times [2024-01-27 15:55:03,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:03,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545210455] [2024-01-27 15:55:03,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:03,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:03,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:03,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545210455] [2024-01-27 15:55:03,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545210455] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:03,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484885313] [2024-01-27 15:55:03,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:55:03,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:03,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:03,659 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 15:55:03,661 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 15:55:03,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:55:03,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:03,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-27 15:55:03,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:03,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:03,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:03,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484885313] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:03,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:55:03,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 6 [2024-01-27 15:55:03,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053854728] [2024-01-27 15:55:03,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:55:03,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:55:03,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:03,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:55:03,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:55:03,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:03,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 24 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 15:55:03,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:03,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:03,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:03,876 INFO L124 PetriNetUnfolderBase]: 63/124 cut-off events. [2024-01-27 15:55:03,876 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2024-01-27 15:55:03,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 124 events. 63/124 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 361 event pairs, 9 based on Foata normal form. 6/130 useless extension candidates. Maximal degree in co-relation 264. Up to 53 conditions per place. [2024-01-27 15:55:03,878 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 25 selfloop transitions, 8 changer transitions 2/38 dead transitions. [2024-01-27 15:55:03,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 38 transitions, 228 flow [2024-01-27 15:55:03,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:55:03,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:55:03,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2024-01-27 15:55:03,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6710526315789473 [2024-01-27 15:55:03,879 INFO L175 Difference]: Start difference. First operand has 26 places, 24 transitions, 108 flow. Second operand 4 states and 51 transitions. [2024-01-27 15:55:03,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 38 transitions, 228 flow [2024-01-27 15:55:03,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 38 transitions, 228 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:55:03,880 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 129 flow [2024-01-27 15:55:03,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2024-01-27 15:55:03,881 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2024-01-27 15:55:03,881 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 129 flow [2024-01-27 15:55:03,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 15:55:03,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:03,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:03,895 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 15:55:04,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:04,095 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 15:55:04,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:04,096 INFO L85 PathProgramCache]: Analyzing trace with hash 548445903, now seen corresponding path program 1 times [2024-01-27 15:55:04,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:04,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021717462] [2024-01-27 15:55:04,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:04,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:04,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:04,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021717462] [2024-01-27 15:55:04,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021717462] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:55:04,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:55:04,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:55:04,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163762720] [2024-01-27 15:55:04,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:55:04,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:55:04,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:04,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:55:04,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:55:04,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:04,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 15:55:04,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:04,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:04,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:04,207 INFO L124 PetriNetUnfolderBase]: 61/132 cut-off events. [2024-01-27 15:55:04,207 INFO L125 PetriNetUnfolderBase]: For 302/302 co-relation queries the response was YES. [2024-01-27 15:55:04,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 132 events. 61/132 cut-off events. For 302/302 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 401 event pairs, 7 based on Foata normal form. 8/140 useless extension candidates. Maximal degree in co-relation 230. Up to 50 conditions per place. [2024-01-27 15:55:04,211 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 32 selfloop transitions, 7 changer transitions 3/45 dead transitions. [2024-01-27 15:55:04,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 45 transitions, 305 flow [2024-01-27 15:55:04,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:55:04,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:55:04,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2024-01-27 15:55:04,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6421052631578947 [2024-01-27 15:55:04,213 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 129 flow. Second operand 5 states and 61 transitions. [2024-01-27 15:55:04,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 45 transitions, 305 flow [2024-01-27 15:55:04,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 45 transitions, 273 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-01-27 15:55:04,218 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 163 flow [2024-01-27 15:55:04,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=163, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-01-27 15:55:04,219 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2024-01-27 15:55:04,219 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 163 flow [2024-01-27 15:55:04,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 15:55:04,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:04,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:04,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:55:04,220 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 15:55:04,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:04,220 INFO L85 PathProgramCache]: Analyzing trace with hash -643460791, now seen corresponding path program 2 times [2024-01-27 15:55:04,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:04,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842451083] [2024-01-27 15:55:04,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:04,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:04,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:04,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:04,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842451083] [2024-01-27 15:55:04,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842451083] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:55:04,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:55:04,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:55:04,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106119154] [2024-01-27 15:55:04,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:55:04,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:55:04,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:04,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:55:04,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:55:04,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:04,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 15:55:04,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:04,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:04,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:04,321 INFO L124 PetriNetUnfolderBase]: 48/104 cut-off events. [2024-01-27 15:55:04,321 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2024-01-27 15:55:04,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 104 events. 48/104 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 249 event pairs, 8 based on Foata normal form. 4/108 useless extension candidates. Maximal degree in co-relation 317. Up to 87 conditions per place. [2024-01-27 15:55:04,322 INFO L140 encePairwiseOnDemand]: 15/19 looper letters, 23 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2024-01-27 15:55:04,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 229 flow [2024-01-27 15:55:04,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:55:04,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:55:04,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2024-01-27 15:55:04,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5657894736842105 [2024-01-27 15:55:04,325 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 163 flow. Second operand 4 states and 43 transitions. [2024-01-27 15:55:04,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 229 flow [2024-01-27 15:55:04,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 223 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-01-27 15:55:04,327 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 165 flow [2024-01-27 15:55:04,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2024-01-27 15:55:04,329 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2024-01-27 15:55:04,329 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 165 flow [2024-01-27 15:55:04,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 15:55:04,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:04,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:04,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:55:04,329 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 15:55:04,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:04,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1143448388, now seen corresponding path program 1 times [2024-01-27 15:55:04,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:04,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303444999] [2024-01-27 15:55:04,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:04,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:04,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:04,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303444999] [2024-01-27 15:55:04,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303444999] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:04,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993868942] [2024-01-27 15:55:04,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:04,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:04,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:04,461 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 15:55:04,465 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 15:55:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:04,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:55:04,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:04,634 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 15:55:04,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:04,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993868942] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:04,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:04,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-01-27 15:55:04,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238281157] [2024-01-27 15:55:04,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:04,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:55:04,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:04,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:55:04,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:55:04,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:04,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 165 flow. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:04,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:04,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:04,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:04,837 INFO L124 PetriNetUnfolderBase]: 113/223 cut-off events. [2024-01-27 15:55:04,837 INFO L125 PetriNetUnfolderBase]: For 560/560 co-relation queries the response was YES. [2024-01-27 15:55:04,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 223 events. 113/223 cut-off events. For 560/560 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 764 event pairs, 2 based on Foata normal form. 20/243 useless extension candidates. Maximal degree in co-relation 478. Up to 85 conditions per place. [2024-01-27 15:55:04,839 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 44 selfloop transitions, 19 changer transitions 9/75 dead transitions. [2024-01-27 15:55:04,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 75 transitions, 577 flow [2024-01-27 15:55:04,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:55:04,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:55:04,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-01-27 15:55:04,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6374269005847953 [2024-01-27 15:55:04,840 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 165 flow. Second operand 9 states and 109 transitions. [2024-01-27 15:55:04,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 75 transitions, 577 flow [2024-01-27 15:55:04,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 75 transitions, 558 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-01-27 15:55:04,842 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 366 flow [2024-01-27 15:55:04,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=366, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-01-27 15:55:04,843 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2024-01-27 15:55:04,843 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 366 flow [2024-01-27 15:55:04,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:04,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:04,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:04,856 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 15:55:05,056 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,SelfDestructingSolverStorable5 [2024-01-27 15:55:05,057 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 15:55:05,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:05,057 INFO L85 PathProgramCache]: Analyzing trace with hash -2047142356, now seen corresponding path program 2 times [2024-01-27 15:55:05,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:05,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433855352] [2024-01-27 15:55:05,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:05,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:05,117 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 15:55:05,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:05,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433855352] [2024-01-27 15:55:05,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433855352] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:05,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825610534] [2024-01-27 15:55:05,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:55:05,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:05,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:05,123 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 15:55:05,126 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 15:55:05,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:55:05,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:05,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:55:05,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:05,241 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 15:55:05,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:05,259 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 15:55:05,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825610534] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:05,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:05,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2024-01-27 15:55:05,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101004472] [2024-01-27 15:55:05,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:05,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:55:05,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:05,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:55:05,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:55:05,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:05,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 366 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:05,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:05,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:05,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:05,348 INFO L124 PetriNetUnfolderBase]: 145/293 cut-off events. [2024-01-27 15:55:05,348 INFO L125 PetriNetUnfolderBase]: For 1447/1447 co-relation queries the response was YES. [2024-01-27 15:55:05,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1542 conditions, 293 events. 145/293 cut-off events. For 1447/1447 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1148 event pairs, 16 based on Foata normal form. 6/299 useless extension candidates. Maximal degree in co-relation 1465. Up to 180 conditions per place. [2024-01-27 15:55:05,350 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 54 selfloop transitions, 17 changer transitions 1/75 dead transitions. [2024-01-27 15:55:05,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 75 transitions, 757 flow [2024-01-27 15:55:05,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:55:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:55:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 75 transitions. [2024-01-27 15:55:05,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2024-01-27 15:55:05,351 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 366 flow. Second operand 6 states and 75 transitions. [2024-01-27 15:55:05,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 75 transitions, 757 flow [2024-01-27 15:55:05,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 75 transitions, 680 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-01-27 15:55:05,356 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 486 flow [2024-01-27 15:55:05,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=486, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2024-01-27 15:55:05,356 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2024-01-27 15:55:05,356 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 486 flow [2024-01-27 15:55:05,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:05,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:05,356 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:05,371 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 15:55:05,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:05,567 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 15:55:05,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:05,568 INFO L85 PathProgramCache]: Analyzing trace with hash -269951898, now seen corresponding path program 3 times [2024-01-27 15:55:05,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:05,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055766298] [2024-01-27 15:55:05,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:05,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:05,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:05,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055766298] [2024-01-27 15:55:05,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055766298] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:05,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117677893] [2024-01-27 15:55:05,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:55:05,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:05,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:05,609 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 15:55:05,636 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 15:55:05,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:55:05,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:05,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:55:05,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:05,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:05,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117677893] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:05,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:05,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-01-27 15:55:05,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76385940] [2024-01-27 15:55:05,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:05,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:55:05,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:05,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:55:05,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:55:05,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:05,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 486 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 15:55:05,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:05,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:05,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:05,841 INFO L124 PetriNetUnfolderBase]: 163/350 cut-off events. [2024-01-27 15:55:05,841 INFO L125 PetriNetUnfolderBase]: For 2579/2579 co-relation queries the response was YES. [2024-01-27 15:55:05,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1857 conditions, 350 events. 163/350 cut-off events. For 2579/2579 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1516 event pairs, 4 based on Foata normal form. 20/370 useless extension candidates. Maximal degree in co-relation 987. Up to 124 conditions per place. [2024-01-27 15:55:05,843 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 59 selfloop transitions, 28 changer transitions 8/98 dead transitions. [2024-01-27 15:55:05,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 98 transitions, 1032 flow [2024-01-27 15:55:05,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:55:05,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:55:05,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-01-27 15:55:05,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6023391812865497 [2024-01-27 15:55:05,844 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 486 flow. Second operand 9 states and 103 transitions. [2024-01-27 15:55:05,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 98 transitions, 1032 flow [2024-01-27 15:55:05,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 98 transitions, 1011 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-01-27 15:55:05,849 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 739 flow [2024-01-27 15:55:05,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=739, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-01-27 15:55:05,850 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 44 predicate places. [2024-01-27 15:55:05,850 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 739 flow [2024-01-27 15:55:05,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 15:55:05,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:05,850 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:05,861 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 15:55:06,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:06,061 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 15:55:06,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:06,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1842836494, now seen corresponding path program 4 times [2024-01-27 15:55:06,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:06,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822545645] [2024-01-27 15:55:06,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:06,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:06,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:06,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822545645] [2024-01-27 15:55:06,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822545645] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:06,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982374502] [2024-01-27 15:55:06,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:55:06,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:06,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:06,099 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 15:55:06,123 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 15:55:06,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:55:06,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:06,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:55:06,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:06,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:06,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982374502] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:06,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:06,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2024-01-27 15:55:06,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777347028] [2024-01-27 15:55:06,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:06,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:55:06,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:06,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:55:06,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:55:06,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:06,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 739 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:55:06,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:06,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:06,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:06,396 INFO L124 PetriNetUnfolderBase]: 156/342 cut-off events. [2024-01-27 15:55:06,396 INFO L125 PetriNetUnfolderBase]: For 3192/3192 co-relation queries the response was YES. [2024-01-27 15:55:06,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2091 conditions, 342 events. 156/342 cut-off events. For 3192/3192 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1499 event pairs, 4 based on Foata normal form. 4/346 useless extension candidates. Maximal degree in co-relation 1686. Up to 105 conditions per place. [2024-01-27 15:55:06,399 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 65 selfloop transitions, 40 changer transitions 0/108 dead transitions. [2024-01-27 15:55:06,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 108 transitions, 1269 flow [2024-01-27 15:55:06,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:55:06,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:55:06,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-01-27 15:55:06,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5885167464114832 [2024-01-27 15:55:06,399 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 739 flow. Second operand 11 states and 123 transitions. [2024-01-27 15:55:06,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 108 transitions, 1269 flow [2024-01-27 15:55:06,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 108 transitions, 1166 flow, removed 50 selfloop flow, removed 1 redundant places. [2024-01-27 15:55:06,409 INFO L231 Difference]: Finished difference. Result has 78 places, 70 transitions, 926 flow [2024-01-27 15:55:06,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=926, PETRI_PLACES=78, PETRI_TRANSITIONS=70} [2024-01-27 15:55:06,409 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 57 predicate places. [2024-01-27 15:55:06,409 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 70 transitions, 926 flow [2024-01-27 15:55:06,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:55:06,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:06,410 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:06,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:55:06,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:06,621 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 15:55:06,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:06,621 INFO L85 PathProgramCache]: Analyzing trace with hash -83466004, now seen corresponding path program 5 times [2024-01-27 15:55:06,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:06,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021818232] [2024-01-27 15:55:06,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:06,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:06,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:06,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:06,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021818232] [2024-01-27 15:55:06,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021818232] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:06,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974489900] [2024-01-27 15:55:06,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:55:06,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:06,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:06,659 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 15:55:06,660 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 15:55:06,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:55:06,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:06,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:55:06,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:06,751 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 15:55:06,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:06,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974489900] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:06,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:06,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-01-27 15:55:06,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710897887] [2024-01-27 15:55:06,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:06,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:55:06,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:06,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:55:06,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:55:06,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:06,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 70 transitions, 926 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:55:06,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:06,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:06,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:06,946 INFO L124 PetriNetUnfolderBase]: 197/441 cut-off events. [2024-01-27 15:55:06,947 INFO L125 PetriNetUnfolderBase]: For 4001/4001 co-relation queries the response was YES. [2024-01-27 15:55:06,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2698 conditions, 441 events. 197/441 cut-off events. For 4001/4001 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2076 event pairs, 10 based on Foata normal form. 10/451 useless extension candidates. Maximal degree in co-relation 2290. Up to 190 conditions per place. [2024-01-27 15:55:06,950 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 71 selfloop transitions, 48 changer transitions 0/122 dead transitions. [2024-01-27 15:55:06,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 122 transitions, 1718 flow [2024-01-27 15:55:06,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:55:06,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:55:06,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2024-01-27 15:55:06,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5482456140350878 [2024-01-27 15:55:06,951 INFO L175 Difference]: Start difference. First operand has 78 places, 70 transitions, 926 flow. Second operand 12 states and 125 transitions. [2024-01-27 15:55:06,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 122 transitions, 1718 flow [2024-01-27 15:55:06,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 122 transitions, 1559 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-01-27 15:55:06,963 INFO L231 Difference]: Finished difference. Result has 91 places, 94 transitions, 1356 flow [2024-01-27 15:55:06,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1356, PETRI_PLACES=91, PETRI_TRANSITIONS=94} [2024-01-27 15:55:06,963 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 70 predicate places. [2024-01-27 15:55:06,964 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 94 transitions, 1356 flow [2024-01-27 15:55:06,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:55:06,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:06,964 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:06,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-01-27 15:55:07,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:07,173 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 15:55:07,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:07,173 INFO L85 PathProgramCache]: Analyzing trace with hash -397185469, now seen corresponding path program 6 times [2024-01-27 15:55:07,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:07,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802470991] [2024-01-27 15:55:07,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:07,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:07,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:07,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802470991] [2024-01-27 15:55:07,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802470991] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:07,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706735788] [2024-01-27 15:55:07,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:55:07,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:07,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:07,217 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 15:55:07,220 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 15:55:07,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:55:07,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:07,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:55:07,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:07,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:07,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706735788] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:07,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:07,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2024-01-27 15:55:07,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328296447] [2024-01-27 15:55:07,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:07,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:55:07,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:07,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:55:07,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:55:07,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:07,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 94 transitions, 1356 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:55:07,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:07,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:07,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:07,513 INFO L124 PetriNetUnfolderBase]: 263/598 cut-off events. [2024-01-27 15:55:07,513 INFO L125 PetriNetUnfolderBase]: For 6834/6834 co-relation queries the response was YES. [2024-01-27 15:55:07,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3824 conditions, 598 events. 263/598 cut-off events. For 6834/6834 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3180 event pairs, 8 based on Foata normal form. 6/604 useless extension candidates. Maximal degree in co-relation 3150. Up to 157 conditions per place. [2024-01-27 15:55:07,518 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 105 selfloop transitions, 62 changer transitions 2/172 dead transitions. [2024-01-27 15:55:07,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 172 transitions, 2442 flow [2024-01-27 15:55:07,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:55:07,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:55:07,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-01-27 15:55:07,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6172248803827751 [2024-01-27 15:55:07,519 INFO L175 Difference]: Start difference. First operand has 91 places, 94 transitions, 1356 flow. Second operand 11 states and 129 transitions. [2024-01-27 15:55:07,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 172 transitions, 2442 flow [2024-01-27 15:55:07,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 172 transitions, 2283 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-01-27 15:55:07,540 INFO L231 Difference]: Finished difference. Result has 102 places, 123 transitions, 1935 flow [2024-01-27 15:55:07,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1935, PETRI_PLACES=102, PETRI_TRANSITIONS=123} [2024-01-27 15:55:07,540 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 81 predicate places. [2024-01-27 15:55:07,540 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 123 transitions, 1935 flow [2024-01-27 15:55:07,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:55:07,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:07,541 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:07,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 15:55:07,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:07,758 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 15:55:07,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:07,758 INFO L85 PathProgramCache]: Analyzing trace with hash -954976596, now seen corresponding path program 7 times [2024-01-27 15:55:07,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:07,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606080842] [2024-01-27 15:55:07,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:07,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:07,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:07,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606080842] [2024-01-27 15:55:07,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606080842] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:07,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966675987] [2024-01-27 15:55:07,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:55:07,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:07,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:07,806 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 15:55:07,807 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 15:55:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:07,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:55:07,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:07,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:07,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966675987] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:07,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:07,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2024-01-27 15:55:07,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934158918] [2024-01-27 15:55:07,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:07,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:55:07,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:07,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:55:07,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:55:07,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:07,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 123 transitions, 1935 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:55:07,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:07,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:07,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:08,072 INFO L124 PetriNetUnfolderBase]: 250/558 cut-off events. [2024-01-27 15:55:08,072 INFO L125 PetriNetUnfolderBase]: For 7375/7375 co-relation queries the response was YES. [2024-01-27 15:55:08,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3904 conditions, 558 events. 250/558 cut-off events. For 7375/7375 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2872 event pairs, 10 based on Foata normal form. 8/566 useless extension candidates. Maximal degree in co-relation 3330. Up to 210 conditions per place. [2024-01-27 15:55:08,077 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 94 selfloop transitions, 44 changer transitions 2/143 dead transitions. [2024-01-27 15:55:08,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 143 transitions, 2394 flow [2024-01-27 15:55:08,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:55:08,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:55:08,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2024-01-27 15:55:08,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210526315789473 [2024-01-27 15:55:08,078 INFO L175 Difference]: Start difference. First operand has 102 places, 123 transitions, 1935 flow. Second operand 10 states and 99 transitions. [2024-01-27 15:55:08,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 143 transitions, 2394 flow [2024-01-27 15:55:08,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 143 transitions, 2231 flow, removed 80 selfloop flow, removed 1 redundant places. [2024-01-27 15:55:08,111 INFO L231 Difference]: Finished difference. Result has 111 places, 119 transitions, 1820 flow [2024-01-27 15:55:08,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1727, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1820, PETRI_PLACES=111, PETRI_TRANSITIONS=119} [2024-01-27 15:55:08,112 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 90 predicate places. [2024-01-27 15:55:08,112 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 119 transitions, 1820 flow [2024-01-27 15:55:08,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:55:08,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:08,113 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:08,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-27 15:55:08,324 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,SelfDestructingSolverStorable11 [2024-01-27 15:55:08,325 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 15:55:08,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:08,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1184150161, now seen corresponding path program 8 times [2024-01-27 15:55:08,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:08,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987225688] [2024-01-27 15:55:08,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:08,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:08,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:55:08,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:08,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987225688] [2024-01-27 15:55:08,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987225688] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:08,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470858395] [2024-01-27 15:55:08,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:55:08,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:08,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:08,365 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 15:55:08,391 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 15:55:08,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:55:08,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:08,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:55:08,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:08,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:08,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470858395] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:08,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:08,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2024-01-27 15:55:08,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898626405] [2024-01-27 15:55:08,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:08,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:55:08,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:08,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:55:08,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:55:08,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:08,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 119 transitions, 1820 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:55:08,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:08,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:08,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:08,615 INFO L124 PetriNetUnfolderBase]: 239/534 cut-off events. [2024-01-27 15:55:08,615 INFO L125 PetriNetUnfolderBase]: For 6684/6684 co-relation queries the response was YES. [2024-01-27 15:55:08,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3682 conditions, 534 events. 239/534 cut-off events. For 6684/6684 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2681 event pairs, 14 based on Foata normal form. 4/538 useless extension candidates. Maximal degree in co-relation 3351. Up to 169 conditions per place. [2024-01-27 15:55:08,620 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 96 selfloop transitions, 48 changer transitions 1/148 dead transitions. [2024-01-27 15:55:08,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 148 transitions, 2363 flow [2024-01-27 15:55:08,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:55:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:55:08,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-01-27 15:55:08,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5672514619883041 [2024-01-27 15:55:08,621 INFO L175 Difference]: Start difference. First operand has 111 places, 119 transitions, 1820 flow. Second operand 9 states and 97 transitions. [2024-01-27 15:55:08,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 148 transitions, 2363 flow [2024-01-27 15:55:08,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 148 transitions, 2293 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-01-27 15:55:08,639 INFO L231 Difference]: Finished difference. Result has 117 places, 122 transitions, 1958 flow [2024-01-27 15:55:08,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1958, PETRI_PLACES=117, PETRI_TRANSITIONS=122} [2024-01-27 15:55:08,640 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 96 predicate places. [2024-01-27 15:55:08,640 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 122 transitions, 1958 flow [2024-01-27 15:55:08,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:55:08,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:08,640 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:08,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-27 15:55:08,851 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,SelfDestructingSolverStorable12 [2024-01-27 15:55:08,851 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 15:55:08,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:08,851 INFO L85 PathProgramCache]: Analyzing trace with hash -667236945, now seen corresponding path program 9 times [2024-01-27 15:55:08,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:08,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358095443] [2024-01-27 15:55:08,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:08,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:08,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:08,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358095443] [2024-01-27 15:55:08,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358095443] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:08,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143608038] [2024-01-27 15:55:08,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:55:08,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:08,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:08,895 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 15:55:08,920 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 15:55:08,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:55:08,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:08,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:55:08,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:08,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:09,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143608038] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:09,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:09,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-01-27 15:55:09,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513986557] [2024-01-27 15:55:09,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:09,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:55:09,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:09,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:55:09,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:55:09,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:09,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 122 transitions, 1958 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 15:55:09,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:09,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:09,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:09,146 INFO L124 PetriNetUnfolderBase]: 231/510 cut-off events. [2024-01-27 15:55:09,146 INFO L125 PetriNetUnfolderBase]: For 6634/6634 co-relation queries the response was YES. [2024-01-27 15:55:09,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3668 conditions, 510 events. 231/510 cut-off events. For 6634/6634 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2490 event pairs, 16 based on Foata normal form. 4/514 useless extension candidates. Maximal degree in co-relation 3375. Up to 161 conditions per place. [2024-01-27 15:55:09,150 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 95 selfloop transitions, 43 changer transitions 4/145 dead transitions. [2024-01-27 15:55:09,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 145 transitions, 2408 flow [2024-01-27 15:55:09,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:55:09,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:55:09,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-01-27 15:55:09,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5672514619883041 [2024-01-27 15:55:09,151 INFO L175 Difference]: Start difference. First operand has 117 places, 122 transitions, 1958 flow. Second operand 9 states and 97 transitions. [2024-01-27 15:55:09,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 145 transitions, 2408 flow [2024-01-27 15:55:09,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 145 transitions, 2303 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-01-27 15:55:09,170 INFO L231 Difference]: Finished difference. Result has 119 places, 116 transitions, 1847 flow [2024-01-27 15:55:09,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1834, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1847, PETRI_PLACES=119, PETRI_TRANSITIONS=116} [2024-01-27 15:55:09,171 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 98 predicate places. [2024-01-27 15:55:09,171 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 116 transitions, 1847 flow [2024-01-27 15:55:09,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 15:55:09,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:09,171 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:09,182 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 15:55:09,382 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,SelfDestructingSolverStorable13 [2024-01-27 15:55:09,382 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 15:55:09,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:09,382 INFO L85 PathProgramCache]: Analyzing trace with hash 382794071, now seen corresponding path program 10 times [2024-01-27 15:55:09,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:09,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270500033] [2024-01-27 15:55:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:09,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:09,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:09,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:09,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270500033] [2024-01-27 15:55:09,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270500033] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:09,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816724019] [2024-01-27 15:55:09,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:55:09,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:09,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:09,453 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 15:55:09,472 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 15:55:09,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:55:09,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:09,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:55:09,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:09,566 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 15:55:09,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:09,594 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 15:55:09,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816724019] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:09,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:09,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 14 [2024-01-27 15:55:09,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126296707] [2024-01-27 15:55:09,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:09,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:55:09,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:09,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:55:09,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:55:09,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:09,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 116 transitions, 1847 flow. Second operand has 15 states, 15 states have (on average 7.866666666666666) internal successors, (118), 15 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:09,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:09,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:09,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:09,797 INFO L124 PetriNetUnfolderBase]: 365/774 cut-off events. [2024-01-27 15:55:09,798 INFO L125 PetriNetUnfolderBase]: For 12643/12643 co-relation queries the response was YES. [2024-01-27 15:55:09,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5577 conditions, 774 events. 365/774 cut-off events. For 12643/12643 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4171 event pairs, 23 based on Foata normal form. 35/809 useless extension candidates. Maximal degree in co-relation 5148. Up to 413 conditions per place. [2024-01-27 15:55:09,804 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 138 selfloop transitions, 55 changer transitions 3/199 dead transitions. [2024-01-27 15:55:09,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 199 transitions, 3255 flow [2024-01-27 15:55:09,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:55:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:55:09,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-01-27 15:55:09,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2024-01-27 15:55:09,806 INFO L175 Difference]: Start difference. First operand has 119 places, 116 transitions, 1847 flow. Second operand 10 states and 125 transitions. [2024-01-27 15:55:09,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 199 transitions, 3255 flow [2024-01-27 15:55:09,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 199 transitions, 3135 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-01-27 15:55:09,832 INFO L231 Difference]: Finished difference. Result has 128 places, 153 transitions, 2596 flow [2024-01-27 15:55:09,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1768, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2596, PETRI_PLACES=128, PETRI_TRANSITIONS=153} [2024-01-27 15:55:09,833 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 107 predicate places. [2024-01-27 15:55:09,833 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 153 transitions, 2596 flow [2024-01-27 15:55:09,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.866666666666666) internal successors, (118), 15 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:09,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:09,834 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:09,850 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 15:55:10,039 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,SelfDestructingSolverStorable14 [2024-01-27 15:55:10,039 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 15:55:10,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:10,040 INFO L85 PathProgramCache]: Analyzing trace with hash -932941053, now seen corresponding path program 11 times [2024-01-27 15:55:10,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:10,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966397489] [2024-01-27 15:55:10,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:10,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:10,110 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 15:55:10,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:10,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966397489] [2024-01-27 15:55:10,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966397489] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:10,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388048189] [2024-01-27 15:55:10,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:55:10,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:10,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:10,112 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 15:55:10,119 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 15:55:10,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:55:10,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:10,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:55:10,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:10,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:10,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:55:10,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388048189] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:10,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:10,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 10 [2024-01-27 15:55:10,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436399347] [2024-01-27 15:55:10,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:10,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:55:10,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:10,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:55:10,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:55:10,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:10,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 153 transitions, 2596 flow. Second operand has 11 states, 11 states have (on average 8.0) internal successors, (88), 11 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 15:55:10,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:10,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:10,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:10,511 INFO L124 PetriNetUnfolderBase]: 547/1162 cut-off events. [2024-01-27 15:55:10,511 INFO L125 PetriNetUnfolderBase]: For 23095/23095 co-relation queries the response was YES. [2024-01-27 15:55:10,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9234 conditions, 1162 events. 547/1162 cut-off events. For 23095/23095 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 7088 event pairs, 56 based on Foata normal form. 17/1179 useless extension candidates. Maximal degree in co-relation 8658. Up to 721 conditions per place. [2024-01-27 15:55:10,520 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 178 selfloop transitions, 79 changer transitions 7/267 dead transitions. [2024-01-27 15:55:10,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 267 transitions, 4936 flow [2024-01-27 15:55:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:55:10,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:55:10,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-01-27 15:55:10,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-01-27 15:55:10,521 INFO L175 Difference]: Start difference. First operand has 128 places, 153 transitions, 2596 flow. Second operand 11 states and 133 transitions. [2024-01-27 15:55:10,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 267 transitions, 4936 flow [2024-01-27 15:55:10,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 267 transitions, 4759 flow, removed 82 selfloop flow, removed 2 redundant places. [2024-01-27 15:55:10,572 INFO L231 Difference]: Finished difference. Result has 143 places, 216 transitions, 4095 flow [2024-01-27 15:55:10,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=2437, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4095, PETRI_PLACES=143, PETRI_TRANSITIONS=216} [2024-01-27 15:55:10,573 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 122 predicate places. [2024-01-27 15:55:10,573 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 216 transitions, 4095 flow [2024-01-27 15:55:10,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.0) internal successors, (88), 11 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 15:55:10,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:10,573 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:10,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-27 15:55:10,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 15:55:10,784 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 15:55:10,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:10,785 INFO L85 PathProgramCache]: Analyzing trace with hash -126354255, now seen corresponding path program 12 times [2024-01-27 15:55:10,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:10,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776549793] [2024-01-27 15:55:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:10,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:10,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:10,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776549793] [2024-01-27 15:55:10,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776549793] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:10,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802650030] [2024-01-27 15:55:10,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:55:10,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:10,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:10,868 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 15:55:10,888 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 15:55:10,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:55:10,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:10,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:55:10,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:10,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:11,016 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 15:55:11,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802650030] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:11,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:11,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 14 [2024-01-27 15:55:11,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653250732] [2024-01-27 15:55:11,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:11,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:55:11,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:11,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:55:11,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:55:11,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:11,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 216 transitions, 4095 flow. Second operand has 15 states, 15 states have (on average 7.733333333333333) internal successors, (116), 15 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:11,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:11,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:11,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:11,343 INFO L124 PetriNetUnfolderBase]: 649/1348 cut-off events. [2024-01-27 15:55:11,344 INFO L125 PetriNetUnfolderBase]: For 35684/35684 co-relation queries the response was YES. [2024-01-27 15:55:11,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11589 conditions, 1348 events. 649/1348 cut-off events. For 35684/35684 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8345 event pairs, 83 based on Foata normal form. 36/1384 useless extension candidates. Maximal degree in co-relation 10956. Up to 1018 conditions per place. [2024-01-27 15:55:11,356 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 220 selfloop transitions, 67 changer transitions 5/295 dead transitions. [2024-01-27 15:55:11,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 295 transitions, 5940 flow [2024-01-27 15:55:11,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:55:11,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:55:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-01-27 15:55:11,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6157894736842106 [2024-01-27 15:55:11,357 INFO L175 Difference]: Start difference. First operand has 143 places, 216 transitions, 4095 flow. Second operand 10 states and 117 transitions. [2024-01-27 15:55:11,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 295 transitions, 5940 flow [2024-01-27 15:55:11,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 295 transitions, 5303 flow, removed 287 selfloop flow, removed 2 redundant places. [2024-01-27 15:55:11,449 INFO L231 Difference]: Finished difference. Result has 155 places, 253 transitions, 4461 flow [2024-01-27 15:55:11,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=3456, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4461, PETRI_PLACES=155, PETRI_TRANSITIONS=253} [2024-01-27 15:55:11,449 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 134 predicate places. [2024-01-27 15:55:11,449 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 253 transitions, 4461 flow [2024-01-27 15:55:11,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.733333333333333) internal successors, (116), 15 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:11,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:11,449 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:11,460 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 15:55:11,660 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,SelfDestructingSolverStorable16 [2024-01-27 15:55:11,660 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 15:55:11,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:11,661 INFO L85 PathProgramCache]: Analyzing trace with hash 159576053, now seen corresponding path program 13 times [2024-01-27 15:55:11,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:11,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018318145] [2024-01-27 15:55:11,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:11,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:11,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:11,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018318145] [2024-01-27 15:55:11,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018318145] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:11,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351824994] [2024-01-27 15:55:11,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:55:11,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:11,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:11,721 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 15:55:11,744 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 15:55:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:11,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:55:11,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:11,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:11,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351824994] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:11,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:11,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-27 15:55:11,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893948687] [2024-01-27 15:55:11,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:11,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:55:11,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:11,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:55:11,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:55:11,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:11,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 253 transitions, 4461 flow. Second operand has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:11,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:11,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:11,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:12,227 INFO L124 PetriNetUnfolderBase]: 665/1436 cut-off events. [2024-01-27 15:55:12,228 INFO L125 PetriNetUnfolderBase]: For 42820/42820 co-relation queries the response was YES. [2024-01-27 15:55:12,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12171 conditions, 1436 events. 665/1436 cut-off events. For 42820/42820 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 9288 event pairs, 14 based on Foata normal form. 40/1476 useless extension candidates. Maximal degree in co-relation 11771. Up to 512 conditions per place. [2024-01-27 15:55:12,238 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 157 selfloop transitions, 152 changer transitions 19/331 dead transitions. [2024-01-27 15:55:12,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 331 transitions, 6456 flow [2024-01-27 15:55:12,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:55:12,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:55:12,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-01-27 15:55:12,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6008771929824561 [2024-01-27 15:55:12,239 INFO L175 Difference]: Start difference. First operand has 155 places, 253 transitions, 4461 flow. Second operand 12 states and 137 transitions. [2024-01-27 15:55:12,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 331 transitions, 6456 flow [2024-01-27 15:55:12,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 331 transitions, 6097 flow, removed 168 selfloop flow, removed 5 redundant places. [2024-01-27 15:55:12,335 INFO L231 Difference]: Finished difference. Result has 167 places, 270 transitions, 5413 flow [2024-01-27 15:55:12,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4153, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5413, PETRI_PLACES=167, PETRI_TRANSITIONS=270} [2024-01-27 15:55:12,335 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 146 predicate places. [2024-01-27 15:55:12,336 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 270 transitions, 5413 flow [2024-01-27 15:55:12,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:12,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:12,336 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:12,349 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 15:55:12,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:12,541 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 15:55:12,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:12,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1265515391, now seen corresponding path program 14 times [2024-01-27 15:55:12,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:12,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806263116] [2024-01-27 15:55:12,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:12,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:12,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:12,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806263116] [2024-01-27 15:55:12,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806263116] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:12,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405782601] [2024-01-27 15:55:12,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:55:12,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:12,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:12,597 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 15:55:12,623 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 15:55:12,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:55:12,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:12,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:55:12,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:12,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:12,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405782601] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:12,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:12,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2024-01-27 15:55:12,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165284677] [2024-01-27 15:55:12,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:12,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:55:12,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:12,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:55:12,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:55:12,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:12,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 270 transitions, 5413 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:12,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:12,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:12,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:13,205 INFO L124 PetriNetUnfolderBase]: 638/1420 cut-off events. [2024-01-27 15:55:13,205 INFO L125 PetriNetUnfolderBase]: For 46742/46742 co-relation queries the response was YES. [2024-01-27 15:55:13,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12728 conditions, 1420 events. 638/1420 cut-off events. For 46742/46742 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 9441 event pairs, 26 based on Foata normal form. 4/1424 useless extension candidates. Maximal degree in co-relation 11815. Up to 270 conditions per place. [2024-01-27 15:55:13,219 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 130 selfloop transitions, 217 changer transitions 1/351 dead transitions. [2024-01-27 15:55:13,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 351 transitions, 7088 flow [2024-01-27 15:55:13,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:55:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:55:13,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 199 transitions. [2024-01-27 15:55:13,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5512465373961218 [2024-01-27 15:55:13,220 INFO L175 Difference]: Start difference. First operand has 167 places, 270 transitions, 5413 flow. Second operand 19 states and 199 transitions. [2024-01-27 15:55:13,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 351 transitions, 7088 flow [2024-01-27 15:55:13,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 351 transitions, 6617 flow, removed 234 selfloop flow, removed 1 redundant places. [2024-01-27 15:55:13,401 INFO L231 Difference]: Finished difference. Result has 188 places, 291 transitions, 6074 flow [2024-01-27 15:55:13,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4970, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6074, PETRI_PLACES=188, PETRI_TRANSITIONS=291} [2024-01-27 15:55:13,402 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 167 predicate places. [2024-01-27 15:55:13,402 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 291 transitions, 6074 flow [2024-01-27 15:55:13,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:13,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:13,402 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:13,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-27 15:55:13,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:13,604 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 15:55:13,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:13,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1811650518, now seen corresponding path program 15 times [2024-01-27 15:55:13,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:13,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178381112] [2024-01-27 15:55:13,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:13,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:13,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:13,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:13,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178381112] [2024-01-27 15:55:13,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178381112] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:13,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144471665] [2024-01-27 15:55:13,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:55:13,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:13,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:13,649 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 15:55:13,676 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 15:55:13,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:55:13,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:13,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:55:13,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:13,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:13,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144471665] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:13,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:13,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2024-01-27 15:55:13,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415675929] [2024-01-27 15:55:13,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:13,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:55:13,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:13,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:55:13,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:55:13,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:13,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 291 transitions, 6074 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:13,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:13,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:13,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:14,230 INFO L124 PetriNetUnfolderBase]: 691/1466 cut-off events. [2024-01-27 15:55:14,230 INFO L125 PetriNetUnfolderBase]: For 32414/32414 co-relation queries the response was YES. [2024-01-27 15:55:14,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12682 conditions, 1466 events. 691/1466 cut-off events. For 32414/32414 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 9443 event pairs, 18 based on Foata normal form. 4/1470 useless extension candidates. Maximal degree in co-relation 12091. Up to 515 conditions per place. [2024-01-27 15:55:14,240 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 239 selfloop transitions, 116 changer transitions 12/370 dead transitions. [2024-01-27 15:55:14,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 370 transitions, 8082 flow [2024-01-27 15:55:14,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 15:55:14,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 15:55:14,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 177 transitions. [2024-01-27 15:55:14,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175438596491229 [2024-01-27 15:55:14,242 INFO L175 Difference]: Start difference. First operand has 188 places, 291 transitions, 6074 flow. Second operand 18 states and 177 transitions. [2024-01-27 15:55:14,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 370 transitions, 8082 flow [2024-01-27 15:55:14,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 370 transitions, 7728 flow, removed 125 selfloop flow, removed 8 redundant places. [2024-01-27 15:55:14,351 INFO L231 Difference]: Finished difference. Result has 200 places, 315 transitions, 6663 flow [2024-01-27 15:55:14,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5623, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6663, PETRI_PLACES=200, PETRI_TRANSITIONS=315} [2024-01-27 15:55:14,351 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 179 predicate places. [2024-01-27 15:55:14,351 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 315 transitions, 6663 flow [2024-01-27 15:55:14,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:14,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:14,352 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:14,365 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 15:55:14,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:14,565 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 15:55:14,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:14,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1188048997, now seen corresponding path program 16 times [2024-01-27 15:55:14,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:14,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893645377] [2024-01-27 15:55:14,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:14,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:55:14,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:14,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893645377] [2024-01-27 15:55:14,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893645377] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:14,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80441262] [2024-01-27 15:55:14,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:55:14,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:14,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:14,606 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 15:55:14,607 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 15:55:14,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:55:14,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:14,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:55:14,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:14,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:14,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80441262] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:14,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:14,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2024-01-27 15:55:14,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638932187] [2024-01-27 15:55:14,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:14,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:55:14,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:14,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:55:14,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:55:14,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:14,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 315 transitions, 6663 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:14,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:14,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:14,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:15,142 INFO L124 PetriNetUnfolderBase]: 723/1508 cut-off events. [2024-01-27 15:55:15,142 INFO L125 PetriNetUnfolderBase]: For 33766/33766 co-relation queries the response was YES. [2024-01-27 15:55:15,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13131 conditions, 1508 events. 723/1508 cut-off events. For 33766/33766 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 9464 event pairs, 28 based on Foata normal form. 20/1528 useless extension candidates. Maximal degree in co-relation 12808. Up to 422 conditions per place. [2024-01-27 15:55:15,155 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 214 selfloop transitions, 170 changer transitions 6/393 dead transitions. [2024-01-27 15:55:15,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 393 transitions, 8628 flow [2024-01-27 15:55:15,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:55:15,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:55:15,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 154 transitions. [2024-01-27 15:55:15,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2024-01-27 15:55:15,156 INFO L175 Difference]: Start difference. First operand has 200 places, 315 transitions, 6663 flow. Second operand 14 states and 154 transitions. [2024-01-27 15:55:15,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 393 transitions, 8628 flow [2024-01-27 15:55:15,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 393 transitions, 8024 flow, removed 270 selfloop flow, removed 2 redundant places. [2024-01-27 15:55:15,296 INFO L231 Difference]: Finished difference. Result has 218 places, 344 transitions, 7304 flow [2024-01-27 15:55:15,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5994, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7304, PETRI_PLACES=218, PETRI_TRANSITIONS=344} [2024-01-27 15:55:15,297 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 197 predicate places. [2024-01-27 15:55:15,297 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 344 transitions, 7304 flow [2024-01-27 15:55:15,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:15,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:15,297 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:15,311 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 15:55:15,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:15,509 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 15:55:15,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:15,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2071926950, now seen corresponding path program 17 times [2024-01-27 15:55:15,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:15,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618810673] [2024-01-27 15:55:15,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:15,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:15,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:55:15,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:15,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618810673] [2024-01-27 15:55:15,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618810673] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:15,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486429899] [2024-01-27 15:55:15,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:55:15,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:15,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:15,555 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 15:55:15,557 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 15:55:15,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:55:15,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:15,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:55:15,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:15,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:15,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486429899] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:15,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:15,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2024-01-27 15:55:15,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384935747] [2024-01-27 15:55:15,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:15,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:55:15,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:15,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:55:15,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:55:15,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:15,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 344 transitions, 7304 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:15,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:15,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:15,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:16,169 INFO L124 PetriNetUnfolderBase]: 767/1590 cut-off events. [2024-01-27 15:55:16,170 INFO L125 PetriNetUnfolderBase]: For 45806/45806 co-relation queries the response was YES. [2024-01-27 15:55:16,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14600 conditions, 1590 events. 767/1590 cut-off events. For 45806/45806 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 10027 event pairs, 30 based on Foata normal form. 14/1604 useless extension candidates. Maximal degree in co-relation 14248. Up to 423 conditions per place. [2024-01-27 15:55:16,183 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 233 selfloop transitions, 184 changer transitions 10/430 dead transitions. [2024-01-27 15:55:16,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 430 transitions, 9898 flow [2024-01-27 15:55:16,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:55:16,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:55:16,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 197 transitions. [2024-01-27 15:55:16,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457063711911357 [2024-01-27 15:55:16,185 INFO L175 Difference]: Start difference. First operand has 218 places, 344 transitions, 7304 flow. Second operand 19 states and 197 transitions. [2024-01-27 15:55:16,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 430 transitions, 9898 flow [2024-01-27 15:55:16,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 430 transitions, 9621 flow, removed 103 selfloop flow, removed 8 redundant places. [2024-01-27 15:55:16,348 INFO L231 Difference]: Finished difference. Result has 236 places, 377 transitions, 9013 flow [2024-01-27 15:55:16,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6916, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9013, PETRI_PLACES=236, PETRI_TRANSITIONS=377} [2024-01-27 15:55:16,348 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 215 predicate places. [2024-01-27 15:55:16,348 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 377 transitions, 9013 flow [2024-01-27 15:55:16,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:16,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:16,349 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:16,368 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 15:55:16,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:16,565 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 15:55:16,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:16,565 INFO L85 PathProgramCache]: Analyzing trace with hash 755769646, now seen corresponding path program 18 times [2024-01-27 15:55:16,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:16,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933280123] [2024-01-27 15:55:16,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:16,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:16,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:16,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933280123] [2024-01-27 15:55:16,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933280123] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:16,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885474122] [2024-01-27 15:55:16,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:55:16,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:16,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:16,612 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 15:55:16,636 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 15:55:16,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:55:16,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:16,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:55:16,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:16,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:16,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:16,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885474122] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:16,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:16,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2024-01-27 15:55:16,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099750936] [2024-01-27 15:55:16,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:16,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:55:16,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:16,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:55:16,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:55:16,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:16,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 377 transitions, 9013 flow. Second operand has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 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 15:55:16,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:16,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:16,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:17,168 INFO L124 PetriNetUnfolderBase]: 739/1505 cut-off events. [2024-01-27 15:55:17,168 INFO L125 PetriNetUnfolderBase]: For 46247/46247 co-relation queries the response was YES. [2024-01-27 15:55:17,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14476 conditions, 1505 events. 739/1505 cut-off events. For 46247/46247 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 9199 event pairs, 32 based on Foata normal form. 6/1511 useless extension candidates. Maximal degree in co-relation 14213. Up to 423 conditions per place. [2024-01-27 15:55:17,181 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 225 selfloop transitions, 171 changer transitions 6/405 dead transitions. [2024-01-27 15:55:17,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 405 transitions, 9852 flow [2024-01-27 15:55:17,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:55:17,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:55:17,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 168 transitions. [2024-01-27 15:55:17,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5526315789473685 [2024-01-27 15:55:17,182 INFO L175 Difference]: Start difference. First operand has 236 places, 377 transitions, 9013 flow. Second operand 16 states and 168 transitions. [2024-01-27 15:55:17,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 405 transitions, 9852 flow [2024-01-27 15:55:17,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 405 transitions, 8883 flow, removed 451 selfloop flow, removed 5 redundant places. [2024-01-27 15:55:17,405 INFO L231 Difference]: Finished difference. Result has 246 places, 365 transitions, 8148 flow [2024-01-27 15:55:17,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7949, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8148, PETRI_PLACES=246, PETRI_TRANSITIONS=365} [2024-01-27 15:55:17,405 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 225 predicate places. [2024-01-27 15:55:17,405 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 365 transitions, 8148 flow [2024-01-27 15:55:17,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 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 15:55:17,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:17,405 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:17,416 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 15:55:17,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:17,606 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 15:55:17,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:17,606 INFO L85 PathProgramCache]: Analyzing trace with hash 944530857, now seen corresponding path program 19 times [2024-01-27 15:55:17,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:17,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214561074] [2024-01-27 15:55:17,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:17,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:17,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:17,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214561074] [2024-01-27 15:55:17,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214561074] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:17,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641865635] [2024-01-27 15:55:17,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:55:17,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:17,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:17,648 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 15:55:17,671 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 15:55:17,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:17,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:55:17,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:17,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:17,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641865635] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:17,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:17,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2024-01-27 15:55:17,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655298755] [2024-01-27 15:55:17,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:17,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:55:17,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:17,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:55:17,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:55:17,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:17,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 365 transitions, 8148 flow. Second operand has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 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 15:55:17,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:17,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:17,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:18,309 INFO L124 PetriNetUnfolderBase]: 751/1543 cut-off events. [2024-01-27 15:55:18,310 INFO L125 PetriNetUnfolderBase]: For 34056/34056 co-relation queries the response was YES. [2024-01-27 15:55:18,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13839 conditions, 1543 events. 751/1543 cut-off events. For 34056/34056 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9547 event pairs, 22 based on Foata normal form. 20/1563 useless extension candidates. Maximal degree in co-relation 13626. Up to 535 conditions per place. [2024-01-27 15:55:18,320 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 202 selfloop transitions, 230 changer transitions 0/435 dead transitions. [2024-01-27 15:55:18,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 435 transitions, 9805 flow [2024-01-27 15:55:18,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:55:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:55:18,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 169 transitions. [2024-01-27 15:55:18,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555921052631579 [2024-01-27 15:55:18,321 INFO L175 Difference]: Start difference. First operand has 246 places, 365 transitions, 8148 flow. Second operand 16 states and 169 transitions. [2024-01-27 15:55:18,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 435 transitions, 9805 flow [2024-01-27 15:55:18,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 435 transitions, 9384 flow, removed 34 selfloop flow, removed 15 redundant places. [2024-01-27 15:55:18,457 INFO L231 Difference]: Finished difference. Result has 249 places, 388 transitions, 8754 flow [2024-01-27 15:55:18,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7659, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8754, PETRI_PLACES=249, PETRI_TRANSITIONS=388} [2024-01-27 15:55:18,457 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 228 predicate places. [2024-01-27 15:55:18,457 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 388 transitions, 8754 flow [2024-01-27 15:55:18,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 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 15:55:18,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:18,458 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:18,468 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 15:55:18,658 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,SelfDestructingSolverStorable23 [2024-01-27 15:55:18,658 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 15:55:18,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:18,658 INFO L85 PathProgramCache]: Analyzing trace with hash -770477942, now seen corresponding path program 20 times [2024-01-27 15:55:18,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:18,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588329036] [2024-01-27 15:55:18,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:18,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:55:18,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:18,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588329036] [2024-01-27 15:55:18,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588329036] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:18,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082179171] [2024-01-27 15:55:18,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:55:18,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:18,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:18,697 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 15:55:18,720 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 15:55:18,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:55:18,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:18,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:55:18,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:18,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:18,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082179171] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:18,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:18,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2024-01-27 15:55:18,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956750619] [2024-01-27 15:55:18,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:18,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:55:18,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:18,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:55:18,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:55:18,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:18,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 388 transitions, 8754 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:18,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:18,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:18,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:19,383 INFO L124 PetriNetUnfolderBase]: 747/1547 cut-off events. [2024-01-27 15:55:19,383 INFO L125 PetriNetUnfolderBase]: For 32398/32398 co-relation queries the response was YES. [2024-01-27 15:55:19,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14045 conditions, 1547 events. 747/1547 cut-off events. For 32398/32398 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 9692 event pairs, 6 based on Foata normal form. 28/1575 useless extension candidates. Maximal degree in co-relation 13826. Up to 508 conditions per place. [2024-01-27 15:55:19,395 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 250 selfloop transitions, 192 changer transitions 0/445 dead transitions. [2024-01-27 15:55:19,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 445 transitions, 9780 flow [2024-01-27 15:55:19,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:55:19,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:55:19,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 222 transitions. [2024-01-27 15:55:19,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556390977443609 [2024-01-27 15:55:19,396 INFO L175 Difference]: Start difference. First operand has 249 places, 388 transitions, 8754 flow. Second operand 21 states and 222 transitions. [2024-01-27 15:55:19,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 445 transitions, 9780 flow [2024-01-27 15:55:19,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 445 transitions, 9471 flow, removed 66 selfloop flow, removed 11 redundant places. [2024-01-27 15:55:19,559 INFO L231 Difference]: Finished difference. Result has 261 places, 388 transitions, 8850 flow [2024-01-27 15:55:19,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=8163, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8850, PETRI_PLACES=261, PETRI_TRANSITIONS=388} [2024-01-27 15:55:19,560 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 240 predicate places. [2024-01-27 15:55:19,560 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 388 transitions, 8850 flow [2024-01-27 15:55:19,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:19,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:19,560 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:19,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-01-27 15:55:19,762 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,SelfDestructingSolverStorable24 [2024-01-27 15:55:19,762 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 15:55:19,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:19,762 INFO L85 PathProgramCache]: Analyzing trace with hash 91509940, now seen corresponding path program 21 times [2024-01-27 15:55:19,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:19,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298266810] [2024-01-27 15:55:19,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:19,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:19,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:19,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298266810] [2024-01-27 15:55:19,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298266810] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:19,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931345815] [2024-01-27 15:55:19,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:55:19,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:19,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:19,806 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 15:55:19,807 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 15:55:19,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:55:19,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:19,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:55:19,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:55:19,891 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:55:19,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931345815] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:55:19,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:55:19,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2024-01-27 15:55:19,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382381893] [2024-01-27 15:55:19,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:55:19,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:55:19,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:19,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:55:19,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:55:19,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:19,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 388 transitions, 8850 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 15:55:19,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:19,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:19,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:20,207 INFO L124 PetriNetUnfolderBase]: 749/1505 cut-off events. [2024-01-27 15:55:20,208 INFO L125 PetriNetUnfolderBase]: For 30669/30669 co-relation queries the response was YES. [2024-01-27 15:55:20,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14144 conditions, 1505 events. 749/1505 cut-off events. For 30669/30669 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9200 event pairs, 7 based on Foata normal form. 15/1520 useless extension candidates. Maximal degree in co-relation 13942. Up to 752 conditions per place. [2024-01-27 15:55:20,220 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 281 selfloop transitions, 34 changer transitions 83/401 dead transitions. [2024-01-27 15:55:20,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 401 transitions, 9690 flow [2024-01-27 15:55:20,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:55:20,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:55:20,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-01-27 15:55:20,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614035087719298 [2024-01-27 15:55:20,221 INFO L175 Difference]: Start difference. First operand has 261 places, 388 transitions, 8850 flow. Second operand 6 states and 64 transitions. [2024-01-27 15:55:20,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 401 transitions, 9690 flow [2024-01-27 15:55:20,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 401 transitions, 9409 flow, removed 51 selfloop flow, removed 11 redundant places. [2024-01-27 15:55:20,384 INFO L231 Difference]: Finished difference. Result has 256 places, 312 transitions, 7116 flow [2024-01-27 15:55:20,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=8527, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7116, PETRI_PLACES=256, PETRI_TRANSITIONS=312} [2024-01-27 15:55:20,384 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 235 predicate places. [2024-01-27 15:55:20,385 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 312 transitions, 7116 flow [2024-01-27 15:55:20,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 15:55:20,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:20,385 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:20,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-01-27 15:55:20,585 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,SelfDestructingSolverStorable25 [2024-01-27 15:55:20,585 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 15:55:20,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:20,586 INFO L85 PathProgramCache]: Analyzing trace with hash -689012620, now seen corresponding path program 22 times [2024-01-27 15:55:20,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:20,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927738227] [2024-01-27 15:55:20,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:20,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:20,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:20,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:20,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927738227] [2024-01-27 15:55:20,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927738227] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:20,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755000828] [2024-01-27 15:55:20,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:55:20,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:20,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:20,624 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 15:55:20,632 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 15:55:20,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:55:20,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:20,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:55:20,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:20,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:20,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755000828] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:20,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:20,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2024-01-27 15:55:20,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002844778] [2024-01-27 15:55:20,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:20,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:55:20,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:20,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:55:20,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:55:20,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:20,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 312 transitions, 7116 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:20,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:20,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:20,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:21,199 INFO L124 PetriNetUnfolderBase]: 599/1241 cut-off events. [2024-01-27 15:55:21,199 INFO L125 PetriNetUnfolderBase]: For 31846/31846 co-relation queries the response was YES. [2024-01-27 15:55:21,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12051 conditions, 1241 events. 599/1241 cut-off events. For 31846/31846 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7302 event pairs, 8 based on Foata normal form. 6/1247 useless extension candidates. Maximal degree in co-relation 11961. Up to 381 conditions per place. [2024-01-27 15:55:21,210 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 196 selfloop transitions, 200 changer transitions 4/403 dead transitions. [2024-01-27 15:55:21,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 403 transitions, 9541 flow [2024-01-27 15:55:21,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:55:21,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:55:21,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 152 transitions. [2024-01-27 15:55:21,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-01-27 15:55:21,211 INFO L175 Difference]: Start difference. First operand has 256 places, 312 transitions, 7116 flow. Second operand 15 states and 152 transitions. [2024-01-27 15:55:21,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 403 transitions, 9541 flow [2024-01-27 15:55:21,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 403 transitions, 8827 flow, removed 118 selfloop flow, removed 23 redundant places. [2024-01-27 15:55:21,349 INFO L231 Difference]: Finished difference. Result has 235 places, 353 transitions, 8417 flow [2024-01-27 15:55:21,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6532, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8417, PETRI_PLACES=235, PETRI_TRANSITIONS=353} [2024-01-27 15:55:21,350 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 214 predicate places. [2024-01-27 15:55:21,350 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 353 transitions, 8417 flow [2024-01-27 15:55:21,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:21,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:21,350 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:21,360 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 15:55:21,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:21,552 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 15:55:21,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:21,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1008463868, now seen corresponding path program 23 times [2024-01-27 15:55:21,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:21,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087945073] [2024-01-27 15:55:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:21,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:55:21,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:21,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087945073] [2024-01-27 15:55:21,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087945073] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:21,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427192701] [2024-01-27 15:55:21,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:55:21,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:21,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:21,596 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 15:55:21,597 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 15:55:21,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:55:21,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:21,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:55:21,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:21,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:21,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427192701] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:21,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:21,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2024-01-27 15:55:21,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925464375] [2024-01-27 15:55:21,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:21,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:55:21,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:21,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:55:21,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:55:21,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:21,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 353 transitions, 8417 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:21,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:21,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:21,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:22,097 INFO L124 PetriNetUnfolderBase]: 586/1205 cut-off events. [2024-01-27 15:55:22,097 INFO L125 PetriNetUnfolderBase]: For 26886/26886 co-relation queries the response was YES. [2024-01-27 15:55:22,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11811 conditions, 1205 events. 586/1205 cut-off events. For 26886/26886 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6970 event pairs, 4 based on Foata normal form. 4/1209 useless extension candidates. Maximal degree in co-relation 11731. Up to 381 conditions per place. [2024-01-27 15:55:22,107 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 201 selfloop transitions, 185 changer transitions 1/390 dead transitions. [2024-01-27 15:55:22,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 390 transitions, 9464 flow [2024-01-27 15:55:22,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:55:22,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:55:22,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 139 transitions. [2024-01-27 15:55:22,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5225563909774437 [2024-01-27 15:55:22,108 INFO L175 Difference]: Start difference. First operand has 235 places, 353 transitions, 8417 flow. Second operand 14 states and 139 transitions. [2024-01-27 15:55:22,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 390 transitions, 9464 flow [2024-01-27 15:55:22,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 390 transitions, 8976 flow, removed 212 selfloop flow, removed 4 redundant places. [2024-01-27 15:55:22,240 INFO L231 Difference]: Finished difference. Result has 245 places, 353 transitions, 8421 flow [2024-01-27 15:55:22,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7908, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8421, PETRI_PLACES=245, PETRI_TRANSITIONS=353} [2024-01-27 15:55:22,241 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 224 predicate places. [2024-01-27 15:55:22,241 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 353 transitions, 8421 flow [2024-01-27 15:55:22,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:22,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:22,241 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:22,251 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 15:55:22,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-01-27 15:55:22,445 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 15:55:22,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:22,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1811305008, now seen corresponding path program 24 times [2024-01-27 15:55:22,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:22,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285105377] [2024-01-27 15:55:22,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:22,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:22,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:22,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285105377] [2024-01-27 15:55:22,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285105377] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:22,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077417192] [2024-01-27 15:55:22,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:55:22,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:22,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:22,502 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 15:55:22,520 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 15:55:22,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:55:22,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:22,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:55:22,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:22,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:22,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077417192] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:22,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:22,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2024-01-27 15:55:22,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408629271] [2024-01-27 15:55:22,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:22,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:55:22,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:22,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:55:22,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:55:22,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:22,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 353 transitions, 8421 flow. Second operand has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 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 15:55:22,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:22,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:22,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:23,033 INFO L124 PetriNetUnfolderBase]: 615/1253 cut-off events. [2024-01-27 15:55:23,033 INFO L125 PetriNetUnfolderBase]: For 22998/22998 co-relation queries the response was YES. [2024-01-27 15:55:23,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12173 conditions, 1253 events. 615/1253 cut-off events. For 22998/22998 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7266 event pairs, 8 based on Foata normal form. 14/1267 useless extension candidates. Maximal degree in co-relation 12091. Up to 526 conditions per place. [2024-01-27 15:55:23,043 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 219 selfloop transitions, 171 changer transitions 5/398 dead transitions. [2024-01-27 15:55:23,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 398 transitions, 9765 flow [2024-01-27 15:55:23,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:55:23,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:55:23,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 135 transitions. [2024-01-27 15:55:23,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075187969924813 [2024-01-27 15:55:23,044 INFO L175 Difference]: Start difference. First operand has 245 places, 353 transitions, 8421 flow. Second operand 14 states and 135 transitions. [2024-01-27 15:55:23,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 398 transitions, 9765 flow [2024-01-27 15:55:23,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 398 transitions, 9329 flow, removed 58 selfloop flow, removed 11 redundant places. [2024-01-27 15:55:23,168 INFO L231 Difference]: Finished difference. Result has 248 places, 371 transitions, 8808 flow [2024-01-27 15:55:23,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=8015, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8808, PETRI_PLACES=248, PETRI_TRANSITIONS=371} [2024-01-27 15:55:23,169 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 227 predicate places. [2024-01-27 15:55:23,169 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 371 transitions, 8808 flow [2024-01-27 15:55:23,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 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 15:55:23,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:23,169 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:23,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-01-27 15:55:23,371 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,SelfDestructingSolverStorable28 [2024-01-27 15:55:23,371 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 15:55:23,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:23,372 INFO L85 PathProgramCache]: Analyzing trace with hash 2019423702, now seen corresponding path program 25 times [2024-01-27 15:55:23,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:23,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852947344] [2024-01-27 15:55:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:23,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:23,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:23,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852947344] [2024-01-27 15:55:23,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852947344] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:23,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696120958] [2024-01-27 15:55:23,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:55:23,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:23,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:23,427 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 15:55:23,428 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 15:55:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:23,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:55:23,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:23,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:23,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696120958] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:23,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:23,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-27 15:55:23,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475677667] [2024-01-27 15:55:23,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:23,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:55:23,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:23,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:55:23,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:55:23,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:23,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 371 transitions, 8808 flow. Second operand has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:23,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:23,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:23,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:23,889 INFO L124 PetriNetUnfolderBase]: 594/1204 cut-off events. [2024-01-27 15:55:23,889 INFO L125 PetriNetUnfolderBase]: For 20450/20450 co-relation queries the response was YES. [2024-01-27 15:55:23,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11823 conditions, 1204 events. 594/1204 cut-off events. For 20450/20450 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6818 event pairs, 6 based on Foata normal form. 10/1214 useless extension candidates. Maximal degree in co-relation 11743. Up to 381 conditions per place. [2024-01-27 15:55:23,897 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 193 selfloop transitions, 180 changer transitions 18/394 dead transitions. [2024-01-27 15:55:23,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 394 transitions, 9650 flow [2024-01-27 15:55:23,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:55:23,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:55:23,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 121 transitions. [2024-01-27 15:55:23,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307017543859649 [2024-01-27 15:55:23,901 INFO L175 Difference]: Start difference. First operand has 248 places, 371 transitions, 8808 flow. Second operand 12 states and 121 transitions. [2024-01-27 15:55:23,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 394 transitions, 9650 flow [2024-01-27 15:55:24,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 394 transitions, 9416 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-01-27 15:55:24,011 INFO L231 Difference]: Finished difference. Result has 252 places, 347 transitions, 8395 flow [2024-01-27 15:55:24,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=8488, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8395, PETRI_PLACES=252, PETRI_TRANSITIONS=347} [2024-01-27 15:55:24,012 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 231 predicate places. [2024-01-27 15:55:24,012 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 347 transitions, 8395 flow [2024-01-27 15:55:24,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:24,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:24,012 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:24,023 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 15:55:24,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:24,213 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 15:55:24,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:24,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1674615306, now seen corresponding path program 26 times [2024-01-27 15:55:24,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:24,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286141410] [2024-01-27 15:55:24,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:24,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:24,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:24,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286141410] [2024-01-27 15:55:24,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286141410] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:24,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45352276] [2024-01-27 15:55:24,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:55:24,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:24,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:24,320 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 15:55:24,334 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 15:55:24,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:55:24,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:24,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:55:24,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:24,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:24,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:55:24,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45352276] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:24,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:24,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 19 [2024-01-27 15:55:24,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219838743] [2024-01-27 15:55:24,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:24,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:55:24,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:24,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:55:24,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:55:24,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:24,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 347 transitions, 8395 flow. Second operand has 20 states, 20 states have (on average 7.3) internal successors, (146), 20 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:24,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:24,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:24,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:24,998 INFO L124 PetriNetUnfolderBase]: 683/1394 cut-off events. [2024-01-27 15:55:24,998 INFO L125 PetriNetUnfolderBase]: For 29502/29502 co-relation queries the response was YES. [2024-01-27 15:55:25,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13875 conditions, 1394 events. 683/1394 cut-off events. For 29502/29502 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 8236 event pairs, 12 based on Foata normal form. 37/1431 useless extension candidates. Maximal degree in co-relation 13796. Up to 930 conditions per place. [2024-01-27 15:55:25,012 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 321 selfloop transitions, 118 changer transitions 17/459 dead transitions. [2024-01-27 15:55:25,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 459 transitions, 11277 flow [2024-01-27 15:55:25,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:55:25,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:55:25,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 161 transitions. [2024-01-27 15:55:25,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518218623481782 [2024-01-27 15:55:25,015 INFO L175 Difference]: Start difference. First operand has 252 places, 347 transitions, 8395 flow. Second operand 13 states and 161 transitions. [2024-01-27 15:55:25,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 459 transitions, 11277 flow [2024-01-27 15:55:25,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 459 transitions, 10907 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-01-27 15:55:25,183 INFO L231 Difference]: Finished difference. Result has 263 places, 401 transitions, 9742 flow [2024-01-27 15:55:25,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=8080, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9742, PETRI_PLACES=263, PETRI_TRANSITIONS=401} [2024-01-27 15:55:25,184 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 242 predicate places. [2024-01-27 15:55:25,184 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 401 transitions, 9742 flow [2024-01-27 15:55:25,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.3) internal successors, (146), 20 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:25,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:25,184 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:25,194 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 15:55:25,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:25,385 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 15:55:25,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:25,385 INFO L85 PathProgramCache]: Analyzing trace with hash -931153204, now seen corresponding path program 27 times [2024-01-27 15:55:25,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:25,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071867873] [2024-01-27 15:55:25,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:25,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:25,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:25,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071867873] [2024-01-27 15:55:25,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071867873] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:25,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300893268] [2024-01-27 15:55:25,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:55:25,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:25,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:25,460 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 15:55:25,480 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 15:55:25,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:55:25,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:25,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:55:25,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:25,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:55:25,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:55:25,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300893268] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:55:25,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:55:25,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2024-01-27 15:55:25,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789762056] [2024-01-27 15:55:25,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:55:25,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:55:25,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:25,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:55:25,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:55:25,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:25,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 401 transitions, 9742 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 15:55:25,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:25,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:25,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:25,879 INFO L124 PetriNetUnfolderBase]: 679/1359 cut-off events. [2024-01-27 15:55:25,879 INFO L125 PetriNetUnfolderBase]: For 28486/28488 co-relation queries the response was YES. [2024-01-27 15:55:25,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14000 conditions, 1359 events. 679/1359 cut-off events. For 28486/28488 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 7984 event pairs, 12 based on Foata normal form. 16/1375 useless extension candidates. Maximal degree in co-relation 13916. Up to 791 conditions per place. [2024-01-27 15:55:25,893 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 292 selfloop transitions, 30 changer transitions 87/412 dead transitions. [2024-01-27 15:55:25,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 412 transitions, 10690 flow [2024-01-27 15:55:25,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:55:25,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:55:25,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 59 transitions. [2024-01-27 15:55:25,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175438596491229 [2024-01-27 15:55:25,894 INFO L175 Difference]: Start difference. First operand has 263 places, 401 transitions, 9742 flow. Second operand 6 states and 59 transitions. [2024-01-27 15:55:25,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 412 transitions, 10690 flow [2024-01-27 15:55:26,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 412 transitions, 10355 flow, removed 90 selfloop flow, removed 6 redundant places. [2024-01-27 15:55:26,101 INFO L231 Difference]: Finished difference. Result has 263 places, 317 transitions, 7869 flow [2024-01-27 15:55:26,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=9381, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7869, PETRI_PLACES=263, PETRI_TRANSITIONS=317} [2024-01-27 15:55:26,101 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 242 predicate places. [2024-01-27 15:55:26,102 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 317 transitions, 7869 flow [2024-01-27 15:55:26,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 15:55:26,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:26,102 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:26,113 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 15:55:26,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:26,313 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 15:55:26,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:26,313 INFO L85 PathProgramCache]: Analyzing trace with hash -2038525330, now seen corresponding path program 28 times [2024-01-27 15:55:26,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:26,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145946095] [2024-01-27 15:55:26,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:26,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:55:26,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:26,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145946095] [2024-01-27 15:55:26,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145946095] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:26,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326740238] [2024-01-27 15:55:26,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:55:26,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:26,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:26,404 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 15:55:26,428 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 15:55:26,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:55:26,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:26,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:55:26,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:26,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:26,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:55:26,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326740238] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:26,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:26,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 5] total 13 [2024-01-27 15:55:26,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863373483] [2024-01-27 15:55:26,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:26,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:55:26,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:26,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:55:26,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:55:26,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:26,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 317 transitions, 7869 flow. Second operand has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 14 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:26,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:26,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:26,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:26,993 INFO L124 PetriNetUnfolderBase]: 735/1408 cut-off events. [2024-01-27 15:55:26,993 INFO L125 PetriNetUnfolderBase]: For 41053/41053 co-relation queries the response was YES. [2024-01-27 15:55:27,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15372 conditions, 1408 events. 735/1408 cut-off events. For 41053/41053 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7879 event pairs, 14 based on Foata normal form. 13/1421 useless extension candidates. Maximal degree in co-relation 15288. Up to 858 conditions per place. [2024-01-27 15:55:27,006 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 276 selfloop transitions, 144 changer transitions 27/450 dead transitions. [2024-01-27 15:55:27,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 450 transitions, 11883 flow [2024-01-27 15:55:27,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:55:27,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:55:27,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 157 transitions. [2024-01-27 15:55:27,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902255639097744 [2024-01-27 15:55:27,008 INFO L175 Difference]: Start difference. First operand has 263 places, 317 transitions, 7869 flow. Second operand 14 states and 157 transitions. [2024-01-27 15:55:27,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 450 transitions, 11883 flow [2024-01-27 15:55:27,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 450 transitions, 10785 flow, removed 147 selfloop flow, removed 24 redundant places. [2024-01-27 15:55:27,158 INFO L231 Difference]: Finished difference. Result has 244 places, 384 transitions, 9385 flow [2024-01-27 15:55:27,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7054, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9385, PETRI_PLACES=244, PETRI_TRANSITIONS=384} [2024-01-27 15:55:27,159 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 223 predicate places. [2024-01-27 15:55:27,159 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 384 transitions, 9385 flow [2024-01-27 15:55:27,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 14 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:27,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:27,159 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:27,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-01-27 15:55:27,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:27,360 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 15:55:27,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:27,360 INFO L85 PathProgramCache]: Analyzing trace with hash 2008595264, now seen corresponding path program 29 times [2024-01-27 15:55:27,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:27,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389403242] [2024-01-27 15:55:27,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:27,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:27,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:27,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:27,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389403242] [2024-01-27 15:55:27,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389403242] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:27,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863531517] [2024-01-27 15:55:27,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:55:27,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:27,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:27,443 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 15:55:27,476 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 15:55:27,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:55:27,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:27,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:55:27,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:27,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:55:27,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863531517] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:27,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:27,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5] total 18 [2024-01-27 15:55:27,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659135389] [2024-01-27 15:55:27,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:27,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:55:27,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:27,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:55:27,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:55:27,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:27,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 384 transitions, 9385 flow. Second operand has 19 states, 19 states have (on average 7.473684210526316) internal successors, (142), 19 states have internal predecessors, (142), 0 states have call successors, (0), 0 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 15:55:27,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:27,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:27,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:28,155 INFO L124 PetriNetUnfolderBase]: 874/1659 cut-off events. [2024-01-27 15:55:28,155 INFO L125 PetriNetUnfolderBase]: For 48349/48349 co-relation queries the response was YES. [2024-01-27 15:55:28,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18491 conditions, 1659 events. 874/1659 cut-off events. For 48349/48349 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 9579 event pairs, 14 based on Foata normal form. 53/1712 useless extension candidates. Maximal degree in co-relation 18413. Up to 1014 conditions per place. [2024-01-27 15:55:28,171 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 304 selfloop transitions, 170 changer transitions 38/515 dead transitions. [2024-01-27 15:55:28,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 515 transitions, 13692 flow [2024-01-27 15:55:28,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:55:28,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:55:28,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 187 transitions. [2024-01-27 15:55:28,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2024-01-27 15:55:28,173 INFO L175 Difference]: Start difference. First operand has 244 places, 384 transitions, 9385 flow. Second operand 17 states and 187 transitions. [2024-01-27 15:55:28,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 515 transitions, 13692 flow [2024-01-27 15:55:28,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 515 transitions, 12875 flow, removed 356 selfloop flow, removed 6 redundant places. [2024-01-27 15:55:28,393 INFO L231 Difference]: Finished difference. Result has 263 places, 443 transitions, 10934 flow [2024-01-27 15:55:28,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=8485, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10934, PETRI_PLACES=263, PETRI_TRANSITIONS=443} [2024-01-27 15:55:28,393 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 242 predicate places. [2024-01-27 15:55:28,394 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 443 transitions, 10934 flow [2024-01-27 15:55:28,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.473684210526316) internal successors, (142), 19 states have internal predecessors, (142), 0 states have call successors, (0), 0 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 15:55:28,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:28,394 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:28,415 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 15:55:28,608 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,SelfDestructingSolverStorable33 [2024-01-27 15:55:28,608 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 15:55:28,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:28,608 INFO L85 PathProgramCache]: Analyzing trace with hash 503453780, now seen corresponding path program 30 times [2024-01-27 15:55:28,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:28,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823840433] [2024-01-27 15:55:28,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:28,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:28,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:28,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:28,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823840433] [2024-01-27 15:55:28,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823840433] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:28,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160904493] [2024-01-27 15:55:28,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:55:28,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:28,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:28,690 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 15:55:28,691 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 15:55:28,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:55:28,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:28,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:55:28,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:28,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:55:28,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160904493] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:28,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:28,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 19 [2024-01-27 15:55:28,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713722664] [2024-01-27 15:55:28,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:28,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:55:28,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:28,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:55:28,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:55:28,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:28,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 443 transitions, 10934 flow. Second operand has 20 states, 20 states have (on average 7.35) internal successors, (147), 20 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:28,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:28,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:28,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:29,340 INFO L124 PetriNetUnfolderBase]: 894/1706 cut-off events. [2024-01-27 15:55:29,340 INFO L125 PetriNetUnfolderBase]: For 66087/66087 co-relation queries the response was YES. [2024-01-27 15:55:29,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19902 conditions, 1706 events. 894/1706 cut-off events. For 66087/66087 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 9924 event pairs, 19 based on Foata normal form. 1/1707 useless extension candidates. Maximal degree in co-relation 19814. Up to 1422 conditions per place. [2024-01-27 15:55:29,356 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 409 selfloop transitions, 83 changer transitions 14/509 dead transitions. [2024-01-27 15:55:29,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 509 transitions, 13761 flow [2024-01-27 15:55:29,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:55:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:55:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 127 transitions. [2024-01-27 15:55:29,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141700404858299 [2024-01-27 15:55:29,357 INFO L175 Difference]: Start difference. First operand has 263 places, 443 transitions, 10934 flow. Second operand 13 states and 127 transitions. [2024-01-27 15:55:29,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 509 transitions, 13761 flow [2024-01-27 15:55:29,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 509 transitions, 12580 flow, removed 533 selfloop flow, removed 3 redundant places. [2024-01-27 15:55:29,618 INFO L231 Difference]: Finished difference. Result has 271 places, 480 transitions, 11022 flow [2024-01-27 15:55:29,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=10051, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11022, PETRI_PLACES=271, PETRI_TRANSITIONS=480} [2024-01-27 15:55:29,619 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 250 predicate places. [2024-01-27 15:55:29,619 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 480 transitions, 11022 flow [2024-01-27 15:55:29,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.35) internal successors, (147), 20 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:29,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:29,619 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:29,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-01-27 15:55:29,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:29,832 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 15:55:29,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:29,832 INFO L85 PathProgramCache]: Analyzing trace with hash 947379634, now seen corresponding path program 31 times [2024-01-27 15:55:29,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:29,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237971065] [2024-01-27 15:55:29,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:29,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:29,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:29,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237971065] [2024-01-27 15:55:29,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237971065] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:29,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620754532] [2024-01-27 15:55:29,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:55:29,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:29,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:29,889 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 15:55:29,890 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 15:55:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:29,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:55:29,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:30,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:30,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620754532] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:30,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:30,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 20 [2024-01-27 15:55:30,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605786375] [2024-01-27 15:55:30,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:30,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:55:30,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:30,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:55:30,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:55:30,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:30,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 480 transitions, 11022 flow. Second operand has 21 states, 21 states have (on average 7.0) internal successors, (147), 21 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:30,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:30,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:30,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:30,805 INFO L124 PetriNetUnfolderBase]: 957/1851 cut-off events. [2024-01-27 15:55:30,805 INFO L125 PetriNetUnfolderBase]: For 74801/74801 co-relation queries the response was YES. [2024-01-27 15:55:30,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21034 conditions, 1851 events. 957/1851 cut-off events. For 74801/74801 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11107 event pairs, 0 based on Foata normal form. 4/1855 useless extension candidates. Maximal degree in co-relation 20944. Up to 475 conditions per place. [2024-01-27 15:55:30,821 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 180 selfloop transitions, 396 changer transitions 2/581 dead transitions. [2024-01-27 15:55:30,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 581 transitions, 14261 flow [2024-01-27 15:55:30,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:55:30,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:55:30,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 218 transitions. [2024-01-27 15:55:30,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5215311004784688 [2024-01-27 15:55:30,823 INFO L175 Difference]: Start difference. First operand has 271 places, 480 transitions, 11022 flow. Second operand 22 states and 218 transitions. [2024-01-27 15:55:30,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 581 transitions, 14261 flow [2024-01-27 15:55:31,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 581 transitions, 14112 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-01-27 15:55:31,092 INFO L231 Difference]: Finished difference. Result has 293 places, 518 transitions, 13793 flow [2024-01-27 15:55:31,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=10878, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=13793, PETRI_PLACES=293, PETRI_TRANSITIONS=518} [2024-01-27 15:55:31,093 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 272 predicate places. [2024-01-27 15:55:31,093 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 518 transitions, 13793 flow [2024-01-27 15:55:31,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.0) internal successors, (147), 21 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:31,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:31,093 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:31,104 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 15:55:31,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:31,296 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 15:55:31,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:31,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1534271758, now seen corresponding path program 32 times [2024-01-27 15:55:31,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:31,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445776930] [2024-01-27 15:55:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:31,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:31,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:31,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445776930] [2024-01-27 15:55:31,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445776930] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:31,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257547931] [2024-01-27 15:55:31,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:55:31,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:31,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:31,354 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 15:55:31,355 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 15:55:31,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:55:31,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:31,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:55:31,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:31,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:31,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257547931] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:31,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:31,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2024-01-27 15:55:31,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750638467] [2024-01-27 15:55:31,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:31,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:55:31,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:31,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:55:31,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:55:31,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:31,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 518 transitions, 13793 flow. Second operand has 20 states, 20 states have (on average 7.0) internal successors, (140), 20 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:31,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:31,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:31,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:32,303 INFO L124 PetriNetUnfolderBase]: 1000/1942 cut-off events. [2024-01-27 15:55:32,303 INFO L125 PetriNetUnfolderBase]: For 92311/92311 co-relation queries the response was YES. [2024-01-27 15:55:32,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24379 conditions, 1942 events. 1000/1942 cut-off events. For 92311/92311 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 11739 event pairs, 0 based on Foata normal form. 16/1958 useless extension candidates. Maximal degree in co-relation 24284. Up to 507 conditions per place. [2024-01-27 15:55:32,323 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 217 selfloop transitions, 372 changer transitions 5/597 dead transitions. [2024-01-27 15:55:32,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 597 transitions, 16751 flow [2024-01-27 15:55:32,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:55:32,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:55:32,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 202 transitions. [2024-01-27 15:55:32,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506265664160401 [2024-01-27 15:55:32,324 INFO L175 Difference]: Start difference. First operand has 293 places, 518 transitions, 13793 flow. Second operand 21 states and 202 transitions. [2024-01-27 15:55:32,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 597 transitions, 16751 flow [2024-01-27 15:55:32,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 597 transitions, 15493 flow, removed 622 selfloop flow, removed 5 redundant places. [2024-01-27 15:55:32,767 INFO L231 Difference]: Finished difference. Result has 316 places, 542 transitions, 15086 flow [2024-01-27 15:55:32,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=12936, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=15086, PETRI_PLACES=316, PETRI_TRANSITIONS=542} [2024-01-27 15:55:32,767 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 295 predicate places. [2024-01-27 15:55:32,768 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 542 transitions, 15086 flow [2024-01-27 15:55:32,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.0) internal successors, (140), 20 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:32,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:32,768 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:32,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-01-27 15:55:32,972 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,SelfDestructingSolverStorable36 [2024-01-27 15:55:32,972 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 15:55:32,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:32,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1528560175, now seen corresponding path program 33 times [2024-01-27 15:55:32,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:32,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464615794] [2024-01-27 15:55:32,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:32,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:55:33,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:33,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464615794] [2024-01-27 15:55:33,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464615794] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:33,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703125854] [2024-01-27 15:55:33,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:55:33,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:33,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:33,019 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 15:55:33,040 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 15:55:33,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:55:33,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:33,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:55:33,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:55:33,132 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:55:33,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703125854] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:55:33,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:55:33,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2024-01-27 15:55:33,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233794741] [2024-01-27 15:55:33,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:55:33,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:55:33,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:33,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:55:33,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:55:33,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:33,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 542 transitions, 15086 flow. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 15:55:33,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:33,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:33,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:33,677 INFO L124 PetriNetUnfolderBase]: 1007/2117 cut-off events. [2024-01-27 15:55:33,677 INFO L125 PetriNetUnfolderBase]: For 65146/65148 co-relation queries the response was YES. [2024-01-27 15:55:33,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24391 conditions, 2117 events. 1007/2117 cut-off events. For 65146/65148 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 14154 event pairs, 12 based on Foata normal form. 24/2141 useless extension candidates. Maximal degree in co-relation 24289. Up to 1387 conditions per place. [2024-01-27 15:55:33,698 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 509 selfloop transitions, 38 changer transitions 38/588 dead transitions. [2024-01-27 15:55:33,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 588 transitions, 17218 flow [2024-01-27 15:55:33,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:55:33,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:55:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-01-27 15:55:33,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614035087719298 [2024-01-27 15:55:33,699 INFO L175 Difference]: Start difference. First operand has 316 places, 542 transitions, 15086 flow. Second operand 6 states and 64 transitions. [2024-01-27 15:55:33,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 588 transitions, 17218 flow [2024-01-27 15:55:34,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 588 transitions, 16716 flow, removed 132 selfloop flow, removed 9 redundant places. [2024-01-27 15:55:34,063 INFO L231 Difference]: Finished difference. Result has 315 places, 525 transitions, 14262 flow [2024-01-27 15:55:34,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=14628, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14262, PETRI_PLACES=315, PETRI_TRANSITIONS=525} [2024-01-27 15:55:34,064 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 294 predicate places. [2024-01-27 15:55:34,064 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 525 transitions, 14262 flow [2024-01-27 15:55:34,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 15:55:34,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:34,064 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:34,075 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 15:55:34,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-01-27 15:55:34,271 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 15:55:34,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:34,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1646706611, now seen corresponding path program 34 times [2024-01-27 15:55:34,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:34,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576575735] [2024-01-27 15:55:34,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:34,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:55:34,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:34,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576575735] [2024-01-27 15:55:34,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576575735] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:34,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198633701] [2024-01-27 15:55:34,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:55:34,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:34,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:34,313 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 15:55:34,344 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 15:55:34,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:55:34,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:34,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:55:34,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:34,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:34,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198633701] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:34,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:34,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 20 [2024-01-27 15:55:34,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732793741] [2024-01-27 15:55:34,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:34,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:55:34,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:34,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:55:34,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:55:34,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:34,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 525 transitions, 14262 flow. Second operand has 21 states, 21 states have (on average 7.0) internal successors, (147), 21 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:34,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:34,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:34,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:35,278 INFO L124 PetriNetUnfolderBase]: 1119/2139 cut-off events. [2024-01-27 15:55:35,278 INFO L125 PetriNetUnfolderBase]: For 57036/57036 co-relation queries the response was YES. [2024-01-27 15:55:35,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24997 conditions, 2139 events. 1119/2139 cut-off events. For 57036/57036 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 12884 event pairs, 48 based on Foata normal form. 28/2167 useless extension candidates. Maximal degree in co-relation 24894. Up to 647 conditions per place. [2024-01-27 15:55:35,299 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 325 selfloop transitions, 350 changer transitions 36/714 dead transitions. [2024-01-27 15:55:35,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 714 transitions, 20125 flow [2024-01-27 15:55:35,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:55:35,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:55:35,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 235 transitions. [2024-01-27 15:55:35,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49473684210526314 [2024-01-27 15:55:35,301 INFO L175 Difference]: Start difference. First operand has 315 places, 525 transitions, 14262 flow. Second operand 25 states and 235 transitions. [2024-01-27 15:55:35,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 714 transitions, 20125 flow [2024-01-27 15:55:35,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 714 transitions, 19631 flow, removed 143 selfloop flow, removed 7 redundant places. [2024-01-27 15:55:35,618 INFO L231 Difference]: Finished difference. Result has 331 places, 622 transitions, 17429 flow [2024-01-27 15:55:35,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=13926, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=17429, PETRI_PLACES=331, PETRI_TRANSITIONS=622} [2024-01-27 15:55:35,619 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 310 predicate places. [2024-01-27 15:55:35,619 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 622 transitions, 17429 flow [2024-01-27 15:55:35,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.0) internal successors, (147), 21 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:35,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:35,619 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:35,632 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 15:55:35,832 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,SelfDestructingSolverStorable38 [2024-01-27 15:55:35,833 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 15:55:35,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:35,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1763043157, now seen corresponding path program 35 times [2024-01-27 15:55:35,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:35,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976570803] [2024-01-27 15:55:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:35,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:55:35,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:35,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976570803] [2024-01-27 15:55:35,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976570803] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:35,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023790174] [2024-01-27 15:55:35,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:55:35,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:35,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:35,882 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 15:55:35,883 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 15:55:35,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:55:35,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:35,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:55:35,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:36,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:36,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:36,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023790174] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:36,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:36,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 20 [2024-01-27 15:55:36,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680316373] [2024-01-27 15:55:36,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:36,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:55:36,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:36,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:55:36,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:55:36,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:36,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 622 transitions, 17429 flow. Second operand has 21 states, 21 states have (on average 7.0) internal successors, (147), 21 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:36,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:36,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:36,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:36,839 INFO L124 PetriNetUnfolderBase]: 1141/2145 cut-off events. [2024-01-27 15:55:36,839 INFO L125 PetriNetUnfolderBase]: For 52232/52232 co-relation queries the response was YES. [2024-01-27 15:55:36,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25830 conditions, 2145 events. 1141/2145 cut-off events. For 52232/52232 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12632 event pairs, 56 based on Foata normal form. 16/2161 useless extension candidates. Maximal degree in co-relation 25729. Up to 659 conditions per place. [2024-01-27 15:55:36,865 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 244 selfloop transitions, 463 changer transitions 11/721 dead transitions. [2024-01-27 15:55:36,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 721 transitions, 21282 flow [2024-01-27 15:55:36,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:55:36,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:55:36,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 213 transitions. [2024-01-27 15:55:36,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4874141876430206 [2024-01-27 15:55:36,867 INFO L175 Difference]: Start difference. First operand has 331 places, 622 transitions, 17429 flow. Second operand 23 states and 213 transitions. [2024-01-27 15:55:36,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 721 transitions, 21282 flow [2024-01-27 15:55:37,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 721 transitions, 19680 flow, removed 717 selfloop flow, removed 10 redundant places. [2024-01-27 15:55:37,322 INFO L231 Difference]: Finished difference. Result has 344 places, 666 transitions, 18691 flow [2024-01-27 15:55:37,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=16074, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=18691, PETRI_PLACES=344, PETRI_TRANSITIONS=666} [2024-01-27 15:55:37,323 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 323 predicate places. [2024-01-27 15:55:37,323 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 666 transitions, 18691 flow [2024-01-27 15:55:37,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.0) internal successors, (147), 21 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:37,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:37,323 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:37,335 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 15:55:37,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-01-27 15:55:37,528 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 15:55:37,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:37,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2134630005, now seen corresponding path program 36 times [2024-01-27 15:55:37,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:37,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513662546] [2024-01-27 15:55:37,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:37,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:37,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:37,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513662546] [2024-01-27 15:55:37,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513662546] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:37,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863863355] [2024-01-27 15:55:37,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:55:37,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:37,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:37,575 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 15:55:37,576 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 15:55:37,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-01-27 15:55:37,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:37,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:55:37,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:37,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:37,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863863355] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:37,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:37,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2024-01-27 15:55:37,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14856253] [2024-01-27 15:55:37,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:37,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:55:37,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:37,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:55:37,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:55:37,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:37,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 666 transitions, 18691 flow. Second operand has 20 states, 20 states have (on average 7.0) internal successors, (140), 20 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:37,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:37,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:37,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:38,627 INFO L124 PetriNetUnfolderBase]: 1189/2216 cut-off events. [2024-01-27 15:55:38,627 INFO L125 PetriNetUnfolderBase]: For 36991/36991 co-relation queries the response was YES. [2024-01-27 15:55:38,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25693 conditions, 2216 events. 1189/2216 cut-off events. For 36991/36991 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12930 event pairs, 54 based on Foata normal form. 12/2228 useless extension candidates. Maximal degree in co-relation 25595. Up to 507 conditions per place. [2024-01-27 15:55:38,651 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 211 selfloop transitions, 518 changer transitions 9/741 dead transitions. [2024-01-27 15:55:38,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 741 transitions, 21468 flow [2024-01-27 15:55:38,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:55:38,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:55:38,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 177 transitions. [2024-01-27 15:55:38,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4903047091412742 [2024-01-27 15:55:38,652 INFO L175 Difference]: Start difference. First operand has 344 places, 666 transitions, 18691 flow. Second operand 19 states and 177 transitions. [2024-01-27 15:55:38,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 741 transitions, 21468 flow [2024-01-27 15:55:39,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 741 transitions, 20369 flow, removed 446 selfloop flow, removed 11 redundant places. [2024-01-27 15:55:39,026 INFO L231 Difference]: Finished difference. Result has 350 places, 696 transitions, 19694 flow [2024-01-27 15:55:39,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=17800, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=19694, PETRI_PLACES=350, PETRI_TRANSITIONS=696} [2024-01-27 15:55:39,026 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 329 predicate places. [2024-01-27 15:55:39,027 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 696 transitions, 19694 flow [2024-01-27 15:55:39,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.0) internal successors, (140), 20 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:39,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:39,027 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:39,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-01-27 15:55:39,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:39,227 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 15:55:39,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:39,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1533194605, now seen corresponding path program 37 times [2024-01-27 15:55:39,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:39,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061666791] [2024-01-27 15:55:39,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:39,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:39,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:39,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061666791] [2024-01-27 15:55:39,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061666791] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:39,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631656274] [2024-01-27 15:55:39,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:55:39,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:39,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:39,278 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 15:55:39,292 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 15:55:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:39,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:55:39,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:39,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:39,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631656274] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:39,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:39,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2024-01-27 15:55:39,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941833394] [2024-01-27 15:55:39,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:39,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:55:39,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:39,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:55:39,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:55:39,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:39,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 696 transitions, 19694 flow. Second operand has 19 states, 19 states have (on average 7.0) internal successors, (133), 19 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:39,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:39,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:39,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:40,322 INFO L124 PetriNetUnfolderBase]: 1203/2206 cut-off events. [2024-01-27 15:55:40,323 INFO L125 PetriNetUnfolderBase]: For 30683/30683 co-relation queries the response was YES. [2024-01-27 15:55:40,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25894 conditions, 2206 events. 1203/2206 cut-off events. For 30683/30683 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12690 event pairs, 42 based on Foata normal form. 32/2238 useless extension candidates. Maximal degree in co-relation 25797. Up to 716 conditions per place. [2024-01-27 15:55:40,343 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 305 selfloop transitions, 420 changer transitions 22/750 dead transitions. [2024-01-27 15:55:40,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 750 transitions, 21929 flow [2024-01-27 15:55:40,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:55:40,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:55:40,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 156 transitions. [2024-01-27 15:55:40,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48297213622291024 [2024-01-27 15:55:40,343 INFO L175 Difference]: Start difference. First operand has 350 places, 696 transitions, 19694 flow. Second operand 17 states and 156 transitions. [2024-01-27 15:55:40,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 750 transitions, 21929 flow [2024-01-27 15:55:40,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 750 transitions, 21503 flow, removed 50 selfloop flow, removed 10 redundant places. [2024-01-27 15:55:40,630 INFO L231 Difference]: Finished difference. Result has 353 places, 700 transitions, 20114 flow [2024-01-27 15:55:40,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=19173, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=20114, PETRI_PLACES=353, PETRI_TRANSITIONS=700} [2024-01-27 15:55:40,630 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 332 predicate places. [2024-01-27 15:55:40,631 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 700 transitions, 20114 flow [2024-01-27 15:55:40,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.0) internal successors, (133), 19 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:40,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:40,631 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:40,642 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 15:55:40,831 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,SelfDestructingSolverStorable41 [2024-01-27 15:55:40,831 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 15:55:40,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:40,832 INFO L85 PathProgramCache]: Analyzing trace with hash 62706985, now seen corresponding path program 38 times [2024-01-27 15:55:40,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:40,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939180319] [2024-01-27 15:55:40,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:40,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:40,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:40,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939180319] [2024-01-27 15:55:40,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939180319] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:40,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984666661] [2024-01-27 15:55:40,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:55:40,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:40,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:40,872 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 15:55:40,890 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 15:55:40,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:55:40,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:40,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:55:40,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:41,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:41,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:41,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984666661] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:41,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:41,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 20 [2024-01-27 15:55:41,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237345315] [2024-01-27 15:55:41,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:41,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:55:41,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:41,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:55:41,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:55:41,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:41,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 700 transitions, 20114 flow. Second operand has 21 states, 21 states have (on average 7.0) internal successors, (147), 21 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:41,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:41,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:41,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:41,905 INFO L124 PetriNetUnfolderBase]: 1210/2237 cut-off events. [2024-01-27 15:55:41,905 INFO L125 PetriNetUnfolderBase]: For 33727/33727 co-relation queries the response was YES. [2024-01-27 15:55:41,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26955 conditions, 2237 events. 1210/2237 cut-off events. For 33727/33727 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13009 event pairs, 50 based on Foata normal form. 4/2241 useless extension candidates. Maximal degree in co-relation 26859. Up to 511 conditions per place. [2024-01-27 15:55:41,927 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 189 selfloop transitions, 571 changer transitions 6/769 dead transitions. [2024-01-27 15:55:41,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 769 transitions, 22960 flow [2024-01-27 15:55:41,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:55:41,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:55:41,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 186 transitions. [2024-01-27 15:55:41,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5152354570637119 [2024-01-27 15:55:41,928 INFO L175 Difference]: Start difference. First operand has 353 places, 700 transitions, 20114 flow. Second operand 19 states and 186 transitions. [2024-01-27 15:55:41,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 769 transitions, 22960 flow [2024-01-27 15:55:42,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 769 transitions, 22445 flow, removed 125 selfloop flow, removed 11 redundant places. [2024-01-27 15:55:42,236 INFO L231 Difference]: Finished difference. Result has 358 places, 720 transitions, 21743 flow [2024-01-27 15:55:42,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=19631, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=555, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=21743, PETRI_PLACES=358, PETRI_TRANSITIONS=720} [2024-01-27 15:55:42,237 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 337 predicate places. [2024-01-27 15:55:42,237 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 720 transitions, 21743 flow [2024-01-27 15:55:42,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.0) internal successors, (147), 21 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:42,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:42,237 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:42,248 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 15:55:42,445 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,SelfDestructingSolverStorable42 [2024-01-27 15:55:42,445 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 15:55:42,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:42,445 INFO L85 PathProgramCache]: Analyzing trace with hash 898132955, now seen corresponding path program 39 times [2024-01-27 15:55:42,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:42,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392268949] [2024-01-27 15:55:42,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:42,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:42,547 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:42,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:42,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392268949] [2024-01-27 15:55:42,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392268949] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:42,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752621661] [2024-01-27 15:55:42,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:55:42,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:42,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:42,548 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 15:55:42,549 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 15:55:42,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:55:42,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:42,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:55:42,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-01-27 15:55:42,656 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:55:42,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752621661] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:55:42,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:55:42,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2024-01-27 15:55:42,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517520430] [2024-01-27 15:55:42,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:55:42,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:55:42,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:42,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:55:42,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:55:42,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:42,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 720 transitions, 21743 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 15:55:42,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:42,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:42,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:43,322 INFO L124 PetriNetUnfolderBase]: 1244/2298 cut-off events. [2024-01-27 15:55:43,322 INFO L125 PetriNetUnfolderBase]: For 32887/32887 co-relation queries the response was YES. [2024-01-27 15:55:43,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28327 conditions, 2298 events. 1244/2298 cut-off events. For 32887/32887 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13428 event pairs, 6 based on Foata normal form. 1/2299 useless extension candidates. Maximal degree in co-relation 28233. Up to 1917 conditions per place. [2024-01-27 15:55:43,344 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 720 selfloop transitions, 37 changer transitions 6/766 dead transitions. [2024-01-27 15:55:43,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 766 transitions, 24180 flow [2024-01-27 15:55:43,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:55:43,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:55:43,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 66 transitions. [2024-01-27 15:55:43,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2024-01-27 15:55:43,345 INFO L175 Difference]: Start difference. First operand has 358 places, 720 transitions, 21743 flow. Second operand 6 states and 66 transitions. [2024-01-27 15:55:43,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 766 transitions, 24180 flow [2024-01-27 15:55:43,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 766 transitions, 23693 flow, removed 234 selfloop flow, removed 5 redundant places. [2024-01-27 15:55:43,709 INFO L231 Difference]: Finished difference. Result has 362 places, 732 transitions, 21785 flow [2024-01-27 15:55:43,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=21315, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=683, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=21785, PETRI_PLACES=362, PETRI_TRANSITIONS=732} [2024-01-27 15:55:43,710 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 341 predicate places. [2024-01-27 15:55:43,710 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 732 transitions, 21785 flow [2024-01-27 15:55:43,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 15:55:43,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:43,710 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:43,721 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 15:55:43,910 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,SelfDestructingSolverStorable43 [2024-01-27 15:55:43,911 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 15:55:43,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:43,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1556943355, now seen corresponding path program 40 times [2024-01-27 15:55:43,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:43,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880826348] [2024-01-27 15:55:43,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:43,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:44,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:44,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880826348] [2024-01-27 15:55:44,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880826348] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:44,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003528844] [2024-01-27 15:55:44,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:55:44,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:44,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:44,007 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 15:55:44,008 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 15:55:44,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:55:44,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:44,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:55:44,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:44,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:55:44,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003528844] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:44,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:44,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 24 [2024-01-27 15:55:44,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906389630] [2024-01-27 15:55:44,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:44,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:55:44,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:44,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:55:44,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:55:44,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:44,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 732 transitions, 21785 flow. Second operand has 25 states, 25 states have (on average 7.2) internal successors, (180), 25 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 15:55:44,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:44,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:44,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:45,302 INFO L124 PetriNetUnfolderBase]: 1439/2666 cut-off events. [2024-01-27 15:55:45,302 INFO L125 PetriNetUnfolderBase]: For 50166/50166 co-relation queries the response was YES. [2024-01-27 15:55:45,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32693 conditions, 2666 events. 1439/2666 cut-off events. For 50166/50166 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 16251 event pairs, 65 based on Foata normal form. 34/2700 useless extension candidates. Maximal degree in co-relation 32595. Up to 1720 conditions per place. [2024-01-27 15:55:45,335 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 576 selfloop transitions, 273 changer transitions 46/898 dead transitions. [2024-01-27 15:55:45,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 898 transitions, 27540 flow [2024-01-27 15:55:45,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:55:45,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:55:45,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 188 transitions. [2024-01-27 15:55:45,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.618421052631579 [2024-01-27 15:55:45,336 INFO L175 Difference]: Start difference. First operand has 362 places, 732 transitions, 21785 flow. Second operand 16 states and 188 transitions. [2024-01-27 15:55:45,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 898 transitions, 27540 flow [2024-01-27 15:55:45,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 898 transitions, 25879 flow, removed 418 selfloop flow, removed 9 redundant places. [2024-01-27 15:55:45,813 INFO L231 Difference]: Finished difference. Result has 378 places, 828 transitions, 23912 flow [2024-01-27 15:55:45,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=20635, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=23912, PETRI_PLACES=378, PETRI_TRANSITIONS=828} [2024-01-27 15:55:45,814 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 357 predicate places. [2024-01-27 15:55:45,814 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 828 transitions, 23912 flow [2024-01-27 15:55:45,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.2) internal successors, (180), 25 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 15:55:45,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:45,814 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:45,825 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 15:55:46,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:46,015 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 15:55:46,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:46,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1997874917, now seen corresponding path program 41 times [2024-01-27 15:55:46,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:46,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455845261] [2024-01-27 15:55:46,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:46,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:55:46,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:46,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455845261] [2024-01-27 15:55:46,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455845261] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:46,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737010645] [2024-01-27 15:55:46,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:55:46,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:46,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:46,094 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 15:55:46,095 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 15:55:46,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-01-27 15:55:46,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:46,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:55:46,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:46,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:55:46,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737010645] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:46,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:46,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 6] total 16 [2024-01-27 15:55:46,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036765282] [2024-01-27 15:55:46,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:46,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:55:46,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:46,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:55:46,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:55:46,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:46,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 828 transitions, 23912 flow. Second operand has 17 states, 17 states have (on average 7.352941176470588) internal successors, (125), 17 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 15:55:46,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:46,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:46,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:47,389 INFO L124 PetriNetUnfolderBase]: 1677/3121 cut-off events. [2024-01-27 15:55:47,389 INFO L125 PetriNetUnfolderBase]: For 54969/54969 co-relation queries the response was YES. [2024-01-27 15:55:47,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37636 conditions, 3121 events. 1677/3121 cut-off events. For 54969/54969 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 19660 event pairs, 80 based on Foata normal form. 9/3122 useless extension candidates. Maximal degree in co-relation 37534. Up to 1936 conditions per place. [2024-01-27 15:55:47,424 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 606 selfloop transitions, 395 changer transitions 14/1018 dead transitions. [2024-01-27 15:55:47,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 1018 transitions, 30333 flow [2024-01-27 15:55:47,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:55:47,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:55:47,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 183 transitions. [2024-01-27 15:55:47,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56656346749226 [2024-01-27 15:55:47,425 INFO L175 Difference]: Start difference. First operand has 378 places, 828 transitions, 23912 flow. Second operand 17 states and 183 transitions. [2024-01-27 15:55:47,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 1018 transitions, 30333 flow [2024-01-27 15:55:47,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 1018 transitions, 29856 flow, removed 138 selfloop flow, removed 5 redundant places. [2024-01-27 15:55:47,940 INFO L231 Difference]: Finished difference. Result has 400 places, 956 transitions, 28440 flow [2024-01-27 15:55:47,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=23449, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=28440, PETRI_PLACES=400, PETRI_TRANSITIONS=956} [2024-01-27 15:55:47,941 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 379 predicate places. [2024-01-27 15:55:47,941 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 956 transitions, 28440 flow [2024-01-27 15:55:47,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.352941176470588) internal successors, (125), 17 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 15:55:47,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:47,941 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:47,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-01-27 15:55:48,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:48,142 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 15:55:48,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:48,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1726516879, now seen corresponding path program 42 times [2024-01-27 15:55:48,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:48,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713070500] [2024-01-27 15:55:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:48,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:48,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:48,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713070500] [2024-01-27 15:55:48,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713070500] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:48,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914565113] [2024-01-27 15:55:48,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:55:48,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:48,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:48,233 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 15:55:48,257 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 15:55:48,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-01-27 15:55:48,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:48,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:55:48,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-27 15:55:48,353 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:55:48,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914565113] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:55:48,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:55:48,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 14 [2024-01-27 15:55:48,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750554696] [2024-01-27 15:55:48,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:55:48,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:55:48,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:48,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:55:48,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:55:48,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:48,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 956 transitions, 28440 flow. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 15:55:48,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:48,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:48,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:49,366 INFO L124 PetriNetUnfolderBase]: 1661/3035 cut-off events. [2024-01-27 15:55:49,366 INFO L125 PetriNetUnfolderBase]: For 57697/57699 co-relation queries the response was YES. [2024-01-27 15:55:49,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38555 conditions, 3035 events. 1661/3035 cut-off events. For 57697/57699 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 18911 event pairs, 19 based on Foata normal form. 31/3062 useless extension candidates. Maximal degree in co-relation 38443. Up to 2312 conditions per place. [2024-01-27 15:55:49,393 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 27 selfloop transitions, 2 changer transitions 954/986 dead transitions. [2024-01-27 15:55:49,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 986 transitions, 30946 flow [2024-01-27 15:55:49,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:55:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:55:49,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 59 transitions. [2024-01-27 15:55:49,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175438596491229 [2024-01-27 15:55:49,394 INFO L175 Difference]: Start difference. First operand has 400 places, 956 transitions, 28440 flow. Second operand 6 states and 59 transitions. [2024-01-27 15:55:49,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 986 transitions, 30946 flow [2024-01-27 15:55:50,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 986 transitions, 29494 flow, removed 685 selfloop flow, removed 3 redundant places. [2024-01-27 15:55:50,021 INFO L231 Difference]: Finished difference. Result has 399 places, 31 transitions, 574 flow [2024-01-27 15:55:50,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=26987, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=953, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=951, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=574, PETRI_PLACES=399, PETRI_TRANSITIONS=31} [2024-01-27 15:55:50,022 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 378 predicate places. [2024-01-27 15:55:50,022 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 31 transitions, 574 flow [2024-01-27 15:55:50,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 15:55:50,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:50,022 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:50,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-01-27 15:55:50,222 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,SelfDestructingSolverStorable46 [2024-01-27 15:55:50,223 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 15:55:50,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:50,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1019233697, now seen corresponding path program 43 times [2024-01-27 15:55:50,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:50,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230413595] [2024-01-27 15:55:50,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:50,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:50,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:50,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230413595] [2024-01-27 15:55:50,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230413595] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:50,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417702077] [2024-01-27 15:55:50,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:55:50,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:50,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:50,272 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 15:55:50,273 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 15:55:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:50,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:55:50,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:50,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:50,534 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:50,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417702077] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:50,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:50,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 25 [2024-01-27 15:55:50,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678183541] [2024-01-27 15:55:50,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:50,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:55:50,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:50,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:55:50,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:55:50,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:50,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 31 transitions, 574 flow. Second operand has 26 states, 26 states have (on average 6.846153846153846) internal successors, (178), 26 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:50,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:50,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:50,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:50,627 INFO L124 PetriNetUnfolderBase]: 42/113 cut-off events. [2024-01-27 15:55:50,627 INFO L125 PetriNetUnfolderBase]: For 4533/4533 co-relation queries the response was YES. [2024-01-27 15:55:50,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1247 conditions, 113 events. 42/113 cut-off events. For 4533/4533 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 253 event pairs, 2 based on Foata normal form. 2/115 useless extension candidates. Maximal degree in co-relation 1132. Up to 39 conditions per place. [2024-01-27 15:55:50,629 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 34 selfloop transitions, 7 changer transitions 16/60 dead transitions. [2024-01-27 15:55:50,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 60 transitions, 887 flow [2024-01-27 15:55:50,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:55:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:55:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 118 transitions. [2024-01-27 15:55:50,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777327935222672 [2024-01-27 15:55:50,629 INFO L175 Difference]: Start difference. First operand has 399 places, 31 transitions, 574 flow. Second operand 13 states and 118 transitions. [2024-01-27 15:55:50,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 60 transitions, 887 flow [2024-01-27 15:55:50,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 60 transitions, 360 flow, removed 113 selfloop flow, removed 124 redundant places. [2024-01-27 15:55:50,635 INFO L231 Difference]: Finished difference. Result has 113 places, 26 transitions, 139 flow [2024-01-27 15:55:50,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=139, PETRI_PLACES=113, PETRI_TRANSITIONS=26} [2024-01-27 15:55:50,635 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 92 predicate places. [2024-01-27 15:55:50,635 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 26 transitions, 139 flow [2024-01-27 15:55:50,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.846153846153846) internal successors, (178), 26 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:50,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:50,635 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:50,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-01-27 15:55:50,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-01-27 15:55:50,836 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 15:55:50,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:50,836 INFO L85 PathProgramCache]: Analyzing trace with hash -847341248, now seen corresponding path program 44 times [2024-01-27 15:55:50,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:50,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599727159] [2024-01-27 15:55:50,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:50,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:50,948 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:50,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:50,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599727159] [2024-01-27 15:55:50,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599727159] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:50,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420538479] [2024-01-27 15:55:50,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:55:50,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:50,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:50,950 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 15:55:50,969 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 15:55:51,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:55:51,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:51,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:55:51,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-01-27 15:55:51,070 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:55:51,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420538479] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:55:51,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:55:51,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 18 [2024-01-27 15:55:51,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982314215] [2024-01-27 15:55:51,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:55:51,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:55:51,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:51,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:55:51,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:55:51,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2024-01-27 15:55:51,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 26 transitions, 139 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 15:55:51,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:51,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2024-01-27 15:55:51,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:51,097 INFO L124 PetriNetUnfolderBase]: 31/81 cut-off events. [2024-01-27 15:55:51,098 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2024-01-27 15:55:51,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 81 events. 31/81 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 134 event pairs, 0 based on Foata normal form. 1/82 useless extension candidates. Maximal degree in co-relation 347. Up to 39 conditions per place. [2024-01-27 15:55:51,098 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 0 selfloop transitions, 0 changer transitions 32/32 dead transitions. [2024-01-27 15:55:51,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 32 transitions, 211 flow [2024-01-27 15:55:51,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:55:51,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:55:51,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 53 transitions. [2024-01-27 15:55:51,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649122807017544 [2024-01-27 15:55:51,098 INFO L175 Difference]: Start difference. First operand has 113 places, 26 transitions, 139 flow. Second operand 6 states and 53 transitions. [2024-01-27 15:55:51,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 32 transitions, 211 flow [2024-01-27 15:55:51,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 32 transitions, 193 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-01-27 15:55:51,099 INFO L231 Difference]: Finished difference. Result has 99 places, 0 transitions, 0 flow [2024-01-27 15:55:51,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=99, PETRI_TRANSITIONS=0} [2024-01-27 15:55:51,100 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 78 predicate places. [2024-01-27 15:55:51,100 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 0 transitions, 0 flow [2024-01-27 15:55:51,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 15:55:51,102 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2024-01-27 15:55:51,102 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2024-01-27 15:55:51,102 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2024-01-27 15:55:51,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-01-27 15:55:51,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-01-27 15:55:51,313 INFO L445 BasicCegarLoop]: Path program histogram: [44, 2, 2, 1] [2024-01-27 15:55:51,315 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-01-27 15:55:51,315 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-01-27 15:55:51,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 03:55:51 BasicIcfg [2024-01-27 15:55:51,319 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-01-27 15:55:51,319 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-01-27 15:55:51,319 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-01-27 15:55:51,319 INFO L274 PluginConnector]: Witness Printer initialized [2024-01-27 15:55:51,320 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:55:02" (3/4) ... [2024-01-27 15:55:51,321 INFO L137 WitnessPrinter]: Generating witness for correct program [2024-01-27 15:55:51,326 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2024-01-27 15:55:51,326 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2024-01-27 15:55:51,331 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 50 nodes and edges [2024-01-27 15:55:51,332 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2024-01-27 15:55:51,332 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-01-27 15:55:51,332 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2024-01-27 15:55:51,399 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-01-27 15:55:51,400 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-01-27 15:55:51,400 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-01-27 15:55:51,400 INFO L158 Benchmark]: Toolchain (without parser) took 49258.64ms. Allocated memory was 117.4MB in the beginning and 989.9MB in the end (delta: 872.4MB). Free memory was 62.2MB in the beginning and 899.5MB in the end (delta: -837.3MB). Peak memory consumption was 37.2MB. Max. memory is 16.1GB. [2024-01-27 15:55:51,401 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 117.4MB. Free memory is still 85.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-01-27 15:55:51,401 INFO L158 Benchmark]: CACSL2BoogieTranslator took 159.36ms. Allocated memory is still 117.4MB. Free memory was 62.1MB in the beginning and 50.7MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-01-27 15:55:51,401 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.51ms. Allocated memory is still 117.4MB. Free memory was 50.7MB in the beginning and 49.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-27 15:55:51,401 INFO L158 Benchmark]: Boogie Preprocessor took 43.38ms. Allocated memory is still 117.4MB. Free memory was 49.2MB in the beginning and 47.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-27 15:55:51,402 INFO L158 Benchmark]: RCFGBuilder took 450.65ms. Allocated memory was 117.4MB in the beginning and 157.3MB in the end (delta: 39.8MB). Free memory was 47.1MB in the beginning and 117.0MB in the end (delta: -69.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-01-27 15:55:51,402 INFO L158 Benchmark]: TraceAbstraction took 48495.74ms. Allocated memory was 157.3MB in the beginning and 989.9MB in the end (delta: 832.6MB). Free memory was 117.0MB in the beginning and 904.2MB in the end (delta: -787.2MB). Peak memory consumption was 45.5MB. Max. memory is 16.1GB. [2024-01-27 15:55:51,402 INFO L158 Benchmark]: Witness Printer took 80.85ms. Allocated memory is still 989.9MB. Free memory was 904.2MB in the beginning and 899.5MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-01-27 15:55:51,407 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 117.4MB. Free memory is still 85.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 159.36ms. Allocated memory is still 117.4MB. Free memory was 62.1MB in the beginning and 50.7MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.51ms. Allocated memory is still 117.4MB. Free memory was 50.7MB in the beginning and 49.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.38ms. Allocated memory is still 117.4MB. Free memory was 49.2MB in the beginning and 47.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 450.65ms. Allocated memory was 117.4MB in the beginning and 157.3MB in the end (delta: 39.8MB). Free memory was 47.1MB in the beginning and 117.0MB in the end (delta: -69.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 48495.74ms. Allocated memory was 157.3MB in the beginning and 989.9MB in the end (delta: 832.6MB). Free memory was 117.0MB in the beginning and 904.2MB in the end (delta: -787.2MB). Peak memory consumption was 45.5MB. Max. memory is 16.1GB. * Witness Printer took 80.85ms. Allocated memory is still 989.9MB. Free memory was 904.2MB in the beginning and 899.5MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 70]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 26 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 48.4s, OverallIterations: 49, TraceHistogramMax: 5, PathProgramHistogramMax: 44, EmptinessCheckTime: 0.0s, AutomataDifference: 28.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3312 SdHoareTripleChecker+Valid, 4.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3312 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 3.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 660 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9448 IncrementalHoareTripleChecker+Invalid, 10108 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 660 mSolverCounterUnsat, 0 mSDtfsCounter, 9448 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2134 GetRequests, 1242 SyntacticMatches, 31 SemanticMatches, 861 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5169 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28440occurred in iteration=46, InterpolantAutomatonStates: 613, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 7.4s InterpolantComputationTime, 1799 NumberOfCodeBlocks, 1792 NumberOfCodeBlocksAsserted, 158 NumberOfCheckSat, 2408 ConstructedInterpolants, 0 QuantifiedInterpolants, 10626 SizeOfPredicates, 13 NumberOfNonLiveVariables, 5740 ConjunctsInSsa, 373 ConjunctsInUnsatCore, 133 InterpolantComputations, 11 PerfectInterpolantSequences, 600/1369 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-01-27 15:55:51,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE