./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:31:06,677 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:31:06,738 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:31:06,741 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:31:06,742 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:31:06,763 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:31:06,764 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:31:06,765 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:31:06,765 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:31:06,768 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:31:06,769 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:31:06,769 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:31:06,769 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:31:06,770 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:31:06,770 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:31:06,771 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:31:06,771 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:31:06,771 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:31:06,771 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:31:06,772 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:31:06,772 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:31:06,772 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:31:06,772 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:31:06,773 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:31:06,773 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:31:06,773 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:31:06,773 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:31:06,774 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:31:06,774 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:31:06,774 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:31:06,775 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:31:06,775 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:31:06,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:31:06,776 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:31:06,776 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:31:06,776 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:31:06,776 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:31:06,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:31:06,777 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:31:06,777 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:31:06,777 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:31:06,777 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:31:06,777 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:31:06,778 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 [2024-06-27 16:31:06,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:31:07,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:31:07,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:31:07,018 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:31:07,019 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:31:07,019 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2024-06-27 16:31:08,056 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:31:08,190 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:31:08,191 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2024-06-27 16:31:08,196 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/014bef6f2/b5451e1326404f78aeca8e13fceb6077/FLAG1bd72122d [2024-06-27 16:31:08,206 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/014bef6f2/b5451e1326404f78aeca8e13fceb6077 [2024-06-27 16:31:08,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:31:08,208 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:31:08,209 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:31:08,209 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:31:08,223 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:31:08,224 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:31:08" (1/1) ... [2024-06-27 16:31:08,224 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c6fba16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:31:08, skipping insertion in model container [2024-06-27 16:31:08,225 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:31:08" (1/1) ... [2024-06-27 16:31:08,239 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:31:08,370 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c[2508,2521] [2024-06-27 16:31:08,377 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:31:08,382 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:31:08,403 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c[2508,2521] [2024-06-27 16:31:08,405 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:31:08,443 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:31:08,444 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:31:08 WrapperNode [2024-06-27 16:31:08,444 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:31:08,445 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:31:08,445 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:31:08,445 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:31:08,453 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:31:08" (1/1) ... [2024-06-27 16:31:08,459 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:31:08" (1/1) ... [2024-06-27 16:31:08,478 INFO L138 Inliner]: procedures = 24, calls = 29, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 193 [2024-06-27 16:31:08,479 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:31:08,479 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:31:08,479 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:31:08,479 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:31:08,487 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:31:08" (1/1) ... [2024-06-27 16:31:08,490 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:31:08" (1/1) ... [2024-06-27 16:31:08,492 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:31:08" (1/1) ... [2024-06-27 16:31:08,510 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-06-27 16:31:08,510 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:31:08" (1/1) ... [2024-06-27 16:31:08,510 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:31:08" (1/1) ... [2024-06-27 16:31:08,516 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:31:08" (1/1) ... [2024-06-27 16:31:08,519 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:31:08" (1/1) ... [2024-06-27 16:31:08,520 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:31:08" (1/1) ... [2024-06-27 16:31:08,521 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:31:08" (1/1) ... [2024-06-27 16:31:08,522 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:31:08,523 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:31:08,523 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:31:08,523 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:31:08,524 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:31:08" (1/1) ... [2024-06-27 16:31:08,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:31:08,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:08,548 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) [2024-06-27 16:31:08,570 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 [2024-06-27 16:31:08,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:31:08,606 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:31:08,606 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:31:08,606 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:31:08,606 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:31:08,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:31:08,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:31:08,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:31:08,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:31:08,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 16:31:08,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:31:08,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:31:08,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:31:08,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:31:08,610 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:31:08,706 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:31:08,708 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:31:08,958 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:31:08,958 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:31:09,135 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:31:09,135 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-06-27 16:31:09,136 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:31:09 BoogieIcfgContainer [2024-06-27 16:31:09,136 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:31:09,138 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:31:09,139 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:31:09,141 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:31:09,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:31:08" (1/3) ... [2024-06-27 16:31:09,142 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@299ba8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:31:09, skipping insertion in model container [2024-06-27 16:31:09,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:31:08" (2/3) ... [2024-06-27 16:31:09,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@299ba8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:31:09, skipping insertion in model container [2024-06-27 16:31:09,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:31:09" (3/3) ... [2024-06-27 16:31:09,145 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2024-06-27 16:31:09,151 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:31:09,159 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:31:09,159 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:31:09,159 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:31:09,231 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 16:31:09,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 28 transitions, 70 flow [2024-06-27 16:31:09,292 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2024-06-27 16:31:09,292 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:31:09,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 6/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-06-27 16:31:09,295 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 28 transitions, 70 flow [2024-06-27 16:31:09,299 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 25 transitions, 62 flow [2024-06-27 16:31:09,311 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:31:09,319 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;@24a27cfa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:31:09,320 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 16:31:09,329 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:31:09,329 INFO L124 PetriNetUnfolderBase]: 6/24 cut-off events. [2024-06-27 16:31:09,329 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:31:09,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:09,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:09,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:09,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:09,334 INFO L85 PathProgramCache]: Analyzing trace with hash 245197459, now seen corresponding path program 1 times [2024-06-27 16:31:09,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:09,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192838402] [2024-06-27 16:31:09,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:09,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:09,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:31:09,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:09,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192838402] [2024-06-27 16:31:09,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192838402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:09,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:09,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 16:31:09,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090967630] [2024-06-27 16:31:09,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:09,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:31:09,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:09,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:31:09,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:31:09,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:09,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 62 flow. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:09,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:09,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:09,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:10,262 INFO L124 PetriNetUnfolderBase]: 288/485 cut-off events. [2024-06-27 16:31:10,262 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-06-27 16:31:10,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 485 events. 288/485 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1767 event pairs, 96 based on Foata normal form. 1/372 useless extension candidates. Maximal degree in co-relation 536. Up to 178 conditions per place. [2024-06-27 16:31:10,267 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 64 selfloop transitions, 10 changer transitions 1/76 dead transitions. [2024-06-27 16:31:10,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 76 transitions, 344 flow [2024-06-27 16:31:10,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:31:10,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:31:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-27 16:31:10,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 16:31:10,287 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 62 flow. Second operand 8 states and 100 transitions. [2024-06-27 16:31:10,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 76 transitions, 344 flow [2024-06-27 16:31:10,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 76 transitions, 316 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 16:31:10,298 INFO L231 Difference]: Finished difference. Result has 33 places, 34 transitions, 123 flow [2024-06-27 16:31:10,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=123, PETRI_PLACES=33, PETRI_TRANSITIONS=34} [2024-06-27 16:31:10,302 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2024-06-27 16:31:10,303 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 34 transitions, 123 flow [2024-06-27 16:31:10,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:10,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:10,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:10,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:31:10,304 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:10,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:10,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1983090722, now seen corresponding path program 1 times [2024-06-27 16:31:10,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:10,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396484222] [2024-06-27 16:31:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:10,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:10,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:31:10,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:10,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396484222] [2024-06-27 16:31:10,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396484222] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:10,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420245321] [2024-06-27 16:31:10,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:10,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:10,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:10,424 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) [2024-06-27 16:31:10,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 16:31:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:10,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-27 16:31:10,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:10,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:31:10,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:31:10,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420245321] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:10,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:31:10,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2024-06-27 16:31:10,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506726324] [2024-06-27 16:31:10,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:10,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:31:10,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:10,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:31:10,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:31:10,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:10,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 34 transitions, 123 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:10,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:10,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:10,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:10,915 INFO L124 PetriNetUnfolderBase]: 617/1023 cut-off events. [2024-06-27 16:31:10,915 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2024-06-27 16:31:10,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2368 conditions, 1023 events. 617/1023 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4490 event pairs, 279 based on Foata normal form. 1/897 useless extension candidates. Maximal degree in co-relation 1517. Up to 479 conditions per place. [2024-06-27 16:31:10,921 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 92 selfloop transitions, 12 changer transitions 1/106 dead transitions. [2024-06-27 16:31:10,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 106 transitions, 540 flow [2024-06-27 16:31:10,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:31:10,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:31:10,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-27 16:31:10,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-27 16:31:10,923 INFO L175 Difference]: Start difference. First operand has 33 places, 34 transitions, 123 flow. Second operand 8 states and 119 transitions. [2024-06-27 16:31:10,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 106 transitions, 540 flow [2024-06-27 16:31:10,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 106 transitions, 536 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 16:31:10,926 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 210 flow [2024-06-27 16:31:10,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=210, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2024-06-27 16:31:10,926 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2024-06-27 16:31:10,927 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 210 flow [2024-06-27 16:31:10,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:10,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:10,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:10,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:11,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:11,140 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:11,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:11,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1744370288, now seen corresponding path program 1 times [2024-06-27 16:31:11,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:11,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207574664] [2024-06-27 16:31:11,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:11,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:31:11,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:11,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207574664] [2024-06-27 16:31:11,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207574664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:11,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:11,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:31:11,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123903915] [2024-06-27 16:31:11,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:11,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:31:11,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:11,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:31:11,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:31:11,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:11,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 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) [2024-06-27 16:31:11,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:11,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:11,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:11,336 INFO L124 PetriNetUnfolderBase]: 487/833 cut-off events. [2024-06-27 16:31:11,336 INFO L125 PetriNetUnfolderBase]: For 570/570 co-relation queries the response was YES. [2024-06-27 16:31:11,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2174 conditions, 833 events. 487/833 cut-off events. For 570/570 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3707 event pairs, 199 based on Foata normal form. 0/745 useless extension candidates. Maximal degree in co-relation 1625. Up to 539 conditions per place. [2024-06-27 16:31:11,340 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 62 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2024-06-27 16:31:11,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 70 transitions, 447 flow [2024-06-27 16:31:11,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:31:11,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:31:11,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2024-06-27 16:31:11,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 16:31:11,343 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 210 flow. Second operand 6 states and 74 transitions. [2024-06-27 16:31:11,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 70 transitions, 447 flow [2024-06-27 16:31:11,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 70 transitions, 420 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 16:31:11,348 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 214 flow [2024-06-27 16:31:11,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-06-27 16:31:11,349 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 21 predicate places. [2024-06-27 16:31:11,350 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 214 flow [2024-06-27 16:31:11,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 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) [2024-06-27 16:31:11,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:11,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:11,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:31:11,350 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:11,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:11,351 INFO L85 PathProgramCache]: Analyzing trace with hash 574455480, now seen corresponding path program 1 times [2024-06-27 16:31:11,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:11,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626155689] [2024-06-27 16:31:11,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:11,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:31:11,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:11,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626155689] [2024-06-27 16:31:11,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626155689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:11,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:11,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:31:11,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119517581] [2024-06-27 16:31:11,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:11,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:31:11,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:11,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:31:11,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:31:11,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:11,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 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) [2024-06-27 16:31:11,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:11,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:11,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:11,549 INFO L124 PetriNetUnfolderBase]: 416/723 cut-off events. [2024-06-27 16:31:11,549 INFO L125 PetriNetUnfolderBase]: For 584/584 co-relation queries the response was YES. [2024-06-27 16:31:11,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1918 conditions, 723 events. 416/723 cut-off events. For 584/584 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3036 event pairs, 207 based on Foata normal form. 0/685 useless extension candidates. Maximal degree in co-relation 1535. Up to 539 conditions per place. [2024-06-27 16:31:11,552 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 52 selfloop transitions, 6 changer transitions 2/61 dead transitions. [2024-06-27 16:31:11,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 61 transitions, 400 flow [2024-06-27 16:31:11,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:31:11,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:31:11,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 67 transitions. [2024-06-27 16:31:11,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 16:31:11,553 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 214 flow. Second operand 6 states and 67 transitions. [2024-06-27 16:31:11,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 61 transitions, 400 flow [2024-06-27 16:31:11,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 384 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 16:31:11,557 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 220 flow [2024-06-27 16:31:11,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=220, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-06-27 16:31:11,558 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 24 predicate places. [2024-06-27 16:31:11,558 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 220 flow [2024-06-27 16:31:11,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 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) [2024-06-27 16:31:11,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:11,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:11,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 16:31:11,560 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:11,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:11,560 INFO L85 PathProgramCache]: Analyzing trace with hash 603243545, now seen corresponding path program 1 times [2024-06-27 16:31:11,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:11,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719603370] [2024-06-27 16:31:11,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:11,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:31:11,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:11,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719603370] [2024-06-27 16:31:11,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719603370] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:11,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440689255] [2024-06-27 16:31:11,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:11,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:11,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:11,697 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) [2024-06-27 16:31:11,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 16:31:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:11,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 16:31:11,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:31:11,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:31:11,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440689255] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:11,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:31:11,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2024-06-27 16:31:11,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639491677] [2024-06-27 16:31:11,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:11,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:31:11,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:11,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:31:11,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-06-27 16:31:11,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:11,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 220 flow. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:11,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:11,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:11,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:12,122 INFO L124 PetriNetUnfolderBase]: 391/674 cut-off events. [2024-06-27 16:31:12,123 INFO L125 PetriNetUnfolderBase]: For 507/507 co-relation queries the response was YES. [2024-06-27 16:31:12,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1792 conditions, 674 events. 391/674 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2835 event pairs, 192 based on Foata normal form. 1/673 useless extension candidates. Maximal degree in co-relation 1757. Up to 539 conditions per place. [2024-06-27 16:31:12,125 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 50 selfloop transitions, 5 changer transitions 11/67 dead transitions. [2024-06-27 16:31:12,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 67 transitions, 421 flow [2024-06-27 16:31:12,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:31:12,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:31:12,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-06-27 16:31:12,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 16:31:12,127 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 220 flow. Second operand 7 states and 77 transitions. [2024-06-27 16:31:12,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 67 transitions, 421 flow [2024-06-27 16:31:12,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 67 transitions, 408 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 16:31:12,129 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 205 flow [2024-06-27 16:31:12,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=205, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2024-06-27 16:31:12,130 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 26 predicate places. [2024-06-27 16:31:12,130 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 205 flow [2024-06-27 16:31:12,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:12,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:12,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:12,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-06-27 16:31:12,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:12,343 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:12,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:12,344 INFO L85 PathProgramCache]: Analyzing trace with hash -915834458, now seen corresponding path program 2 times [2024-06-27 16:31:12,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:12,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073377099] [2024-06-27 16:31:12,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:12,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:31:12,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:12,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073377099] [2024-06-27 16:31:12,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073377099] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:12,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311888787] [2024-06-27 16:31:12,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:31:12,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:12,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:12,437 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) [2024-06-27 16:31:12,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 16:31:12,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-27 16:31:12,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:12,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 16:31:12,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:31:12,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:31:12,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311888787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:12,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:31:12,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2024-06-27 16:31:12,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191209859] [2024-06-27 16:31:12,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:12,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:31:12,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:12,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:31:12,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:31:12,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:12,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 205 flow. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:12,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:12,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:12,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:12,756 INFO L124 PetriNetUnfolderBase]: 388/672 cut-off events. [2024-06-27 16:31:12,756 INFO L125 PetriNetUnfolderBase]: For 456/456 co-relation queries the response was YES. [2024-06-27 16:31:12,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1777 conditions, 672 events. 388/672 cut-off events. For 456/456 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2805 event pairs, 61 based on Foata normal form. 1/671 useless extension candidates. Maximal degree in co-relation 1737. Up to 232 conditions per place. [2024-06-27 16:31:12,759 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 67 selfloop transitions, 18 changer transitions 1/87 dead transitions. [2024-06-27 16:31:12,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 87 transitions, 523 flow [2024-06-27 16:31:12,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:12,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:12,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-27 16:31:12,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-27 16:31:12,761 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 205 flow. Second operand 9 states and 107 transitions. [2024-06-27 16:31:12,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 87 transitions, 523 flow [2024-06-27 16:31:12,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 87 transitions, 504 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 16:31:12,763 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 288 flow [2024-06-27 16:31:12,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=288, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2024-06-27 16:31:12,764 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 31 predicate places. [2024-06-27 16:31:12,764 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 288 flow [2024-06-27 16:31:12,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:12,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:12,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:12,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:12,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:12,975 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:12,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:12,976 INFO L85 PathProgramCache]: Analyzing trace with hash -133012491, now seen corresponding path program 2 times [2024-06-27 16:31:12,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:12,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777481472] [2024-06-27 16:31:12,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:12,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:13,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:31:13,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:13,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777481472] [2024-06-27 16:31:13,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777481472] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:13,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453063188] [2024-06-27 16:31:13,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:31:13,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:13,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:13,113 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) [2024-06-27 16:31:13,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 16:31:13,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-27 16:31:13,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:13,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-27 16:31:13,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:31:13,218 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:31:13,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453063188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:13,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:31:13,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2024-06-27 16:31:13,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466279770] [2024-06-27 16:31:13,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:13,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:31:13,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:13,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:31:13,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:13,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:13,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 288 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:13,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:13,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:13,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:13,326 INFO L124 PetriNetUnfolderBase]: 482/826 cut-off events. [2024-06-27 16:31:13,326 INFO L125 PetriNetUnfolderBase]: For 901/901 co-relation queries the response was YES. [2024-06-27 16:31:13,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2306 conditions, 826 events. 482/826 cut-off events. For 901/901 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3584 event pairs, 33 based on Foata normal form. 2/826 useless extension candidates. Maximal degree in co-relation 2104. Up to 313 conditions per place. [2024-06-27 16:31:13,329 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 50 selfloop transitions, 17 changer transitions 5/73 dead transitions. [2024-06-27 16:31:13,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 73 transitions, 519 flow [2024-06-27 16:31:13,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:31:13,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:31:13,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 69 transitions. [2024-06-27 16:31:13,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2024-06-27 16:31:13,330 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 288 flow. Second operand 5 states and 69 transitions. [2024-06-27 16:31:13,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 73 transitions, 519 flow [2024-06-27 16:31:13,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 505 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 16:31:13,333 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 317 flow [2024-06-27 16:31:13,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=317, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2024-06-27 16:31:13,334 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 35 predicate places. [2024-06-27 16:31:13,334 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 317 flow [2024-06-27 16:31:13,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:13,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:13,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:13,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:13,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:13,545 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:13,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:13,546 INFO L85 PathProgramCache]: Analyzing trace with hash -2026604512, now seen corresponding path program 1 times [2024-06-27 16:31:13,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:13,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611180428] [2024-06-27 16:31:13,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:13,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:31:13,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:13,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611180428] [2024-06-27 16:31:13,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611180428] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:13,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042372995] [2024-06-27 16:31:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:13,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:13,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:13,639 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) [2024-06-27 16:31:13,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 16:31:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:13,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:31:13,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:31:13,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:31:13,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042372995] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:13,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:31:13,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-06-27 16:31:13,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825244746] [2024-06-27 16:31:13,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:13,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:31:13,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:13,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:31:13,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:31:13,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:13,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 317 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:13,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:13,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:13,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:14,006 INFO L124 PetriNetUnfolderBase]: 488/817 cut-off events. [2024-06-27 16:31:14,006 INFO L125 PetriNetUnfolderBase]: For 1632/1632 co-relation queries the response was YES. [2024-06-27 16:31:14,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2484 conditions, 817 events. 488/817 cut-off events. For 1632/1632 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3379 event pairs, 182 based on Foata normal form. 20/836 useless extension candidates. Maximal degree in co-relation 2449. Up to 264 conditions per place. [2024-06-27 16:31:14,009 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 74 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2024-06-27 16:31:14,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 663 flow [2024-06-27 16:31:14,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:31:14,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:31:14,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-06-27 16:31:14,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 16:31:14,010 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 317 flow. Second operand 8 states and 94 transitions. [2024-06-27 16:31:14,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 663 flow [2024-06-27 16:31:14,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 620 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 16:31:14,014 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 326 flow [2024-06-27 16:31:14,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=326, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2024-06-27 16:31:14,015 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 31 predicate places. [2024-06-27 16:31:14,015 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 326 flow [2024-06-27 16:31:14,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:14,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:14,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:14,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:14,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:14,227 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:14,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:14,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1401016533, now seen corresponding path program 1 times [2024-06-27 16:31:14,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:14,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198980194] [2024-06-27 16:31:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:14,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:31:14,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:14,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198980194] [2024-06-27 16:31:14,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198980194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:14,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:14,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:31:14,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631693083] [2024-06-27 16:31:14,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:14,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:31:14,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:14,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:31:14,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:31:14,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:14,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 326 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:14,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:14,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:14,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:14,377 INFO L124 PetriNetUnfolderBase]: 370/636 cut-off events. [2024-06-27 16:31:14,378 INFO L125 PetriNetUnfolderBase]: For 1179/1179 co-relation queries the response was YES. [2024-06-27 16:31:14,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1906 conditions, 636 events. 370/636 cut-off events. For 1179/1179 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2525 event pairs, 188 based on Foata normal form. 25/616 useless extension candidates. Maximal degree in co-relation 1872. Up to 396 conditions per place. [2024-06-27 16:31:14,380 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 52 selfloop transitions, 6 changer transitions 2/61 dead transitions. [2024-06-27 16:31:14,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 61 transitions, 446 flow [2024-06-27 16:31:14,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:31:14,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:31:14,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-06-27 16:31:14,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-27 16:31:14,381 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 326 flow. Second operand 5 states and 66 transitions. [2024-06-27 16:31:14,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 61 transitions, 446 flow [2024-06-27 16:31:14,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 422 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 16:31:14,384 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 263 flow [2024-06-27 16:31:14,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=263, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2024-06-27 16:31:14,385 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2024-06-27 16:31:14,385 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 263 flow [2024-06-27 16:31:14,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:14,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:14,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:14,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 16:31:14,386 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:14,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:14,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1357813479, now seen corresponding path program 1 times [2024-06-27 16:31:14,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:14,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999258562] [2024-06-27 16:31:14,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:14,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:31:14,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:14,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999258562] [2024-06-27 16:31:14,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999258562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:14,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:14,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:31:14,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383731482] [2024-06-27 16:31:14,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:14,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:31:14,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:14,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:31:14,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:31:14,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:14,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 263 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:14,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:14,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:14,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:14,559 INFO L124 PetriNetUnfolderBase]: 302/525 cut-off events. [2024-06-27 16:31:14,559 INFO L125 PetriNetUnfolderBase]: For 767/767 co-relation queries the response was YES. [2024-06-27 16:31:14,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1535 conditions, 525 events. 302/525 cut-off events. For 767/767 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1960 event pairs, 170 based on Foata normal form. 0/496 useless extension candidates. Maximal degree in co-relation 1504. Up to 396 conditions per place. [2024-06-27 16:31:14,561 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 30 selfloop transitions, 2 changer transitions 20/53 dead transitions. [2024-06-27 16:31:14,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 53 transitions, 368 flow [2024-06-27 16:31:14,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:31:14,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:31:14,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-06-27 16:31:14,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 16:31:14,563 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 263 flow. Second operand 5 states and 60 transitions. [2024-06-27 16:31:14,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 53 transitions, 368 flow [2024-06-27 16:31:14,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 354 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 16:31:14,565 INFO L231 Difference]: Finished difference. Result has 54 places, 33 transitions, 168 flow [2024-06-27 16:31:14,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=54, PETRI_TRANSITIONS=33} [2024-06-27 16:31:14,566 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2024-06-27 16:31:14,566 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 33 transitions, 168 flow [2024-06-27 16:31:14,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:14,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:14,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:14,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 16:31:14,567 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:14,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:14,567 INFO L85 PathProgramCache]: Analyzing trace with hash -333811787, now seen corresponding path program 1 times [2024-06-27 16:31:14,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:14,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471792108] [2024-06-27 16:31:14,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:14,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:31:14,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:14,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471792108] [2024-06-27 16:31:14,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471792108] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:14,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380440240] [2024-06-27 16:31:14,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:14,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:14,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:14,705 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) [2024-06-27 16:31:14,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 16:31:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:14,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:31:14,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:14,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:31:14,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:31:14,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380440240] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:14,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:31:14,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-06-27 16:31:14,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913684494] [2024-06-27 16:31:14,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:14,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:31:14,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:14,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:31:14,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:31:14,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:14,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 33 transitions, 168 flow. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:14,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:14,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:14,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:15,014 INFO L124 PetriNetUnfolderBase]: 328/561 cut-off events. [2024-06-27 16:31:15,015 INFO L125 PetriNetUnfolderBase]: For 674/674 co-relation queries the response was YES. [2024-06-27 16:31:15,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1645 conditions, 561 events. 328/561 cut-off events. For 674/674 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2111 event pairs, 159 based on Foata normal form. 28/588 useless extension candidates. Maximal degree in co-relation 1614. Up to 278 conditions per place. [2024-06-27 16:31:15,017 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 39 selfloop transitions, 9 changer transitions 0/49 dead transitions. [2024-06-27 16:31:15,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 333 flow [2024-06-27 16:31:15,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:31:15,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:31:15,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 62 transitions. [2024-06-27 16:31:15,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3163265306122449 [2024-06-27 16:31:15,018 INFO L175 Difference]: Start difference. First operand has 54 places, 33 transitions, 168 flow. Second operand 7 states and 62 transitions. [2024-06-27 16:31:15,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 333 flow [2024-06-27 16:31:15,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 49 transitions, 312 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 16:31:15,021 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 186 flow [2024-06-27 16:31:15,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2024-06-27 16:31:15,022 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2024-06-27 16:31:15,022 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 186 flow [2024-06-27 16:31:15,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:15,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:15,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:15,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:15,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:15,234 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:15,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:15,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1721947342, now seen corresponding path program 1 times [2024-06-27 16:31:15,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:15,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438566301] [2024-06-27 16:31:15,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:15,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:15,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:15,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438566301] [2024-06-27 16:31:15,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438566301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:15,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:15,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 16:31:15,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581347806] [2024-06-27 16:31:15,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:15,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 16:31:15,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:15,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 16:31:15,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 16:31:15,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:15,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 186 flow. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:15,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:15,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:15,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:15,707 INFO L124 PetriNetUnfolderBase]: 461/793 cut-off events. [2024-06-27 16:31:15,707 INFO L125 PetriNetUnfolderBase]: For 1195/1195 co-relation queries the response was YES. [2024-06-27 16:31:15,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2490 conditions, 793 events. 461/793 cut-off events. For 1195/1195 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3394 event pairs, 122 based on Foata normal form. 1/793 useless extension candidates. Maximal degree in co-relation 2458. Up to 485 conditions per place. [2024-06-27 16:31:15,710 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 57 selfloop transitions, 12 changer transitions 6/76 dead transitions. [2024-06-27 16:31:15,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 507 flow [2024-06-27 16:31:15,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:31:15,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:31:15,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 97 transitions. [2024-06-27 16:31:15,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3464285714285714 [2024-06-27 16:31:15,711 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 186 flow. Second operand 10 states and 97 transitions. [2024-06-27 16:31:15,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 507 flow [2024-06-27 16:31:15,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 76 transitions, 494 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 16:31:15,713 INFO L231 Difference]: Finished difference. Result has 56 places, 39 transitions, 260 flow [2024-06-27 16:31:15,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=260, PETRI_PLACES=56, PETRI_TRANSITIONS=39} [2024-06-27 16:31:15,714 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 30 predicate places. [2024-06-27 16:31:15,714 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 39 transitions, 260 flow [2024-06-27 16:31:15,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:15,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:15,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:15,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 16:31:15,715 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:15,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:15,715 INFO L85 PathProgramCache]: Analyzing trace with hash -425613040, now seen corresponding path program 2 times [2024-06-27 16:31:15,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:15,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881620147] [2024-06-27 16:31:15,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:15,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:15,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:15,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881620147] [2024-06-27 16:31:15,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881620147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:15,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:15,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:15,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644596089] [2024-06-27 16:31:15,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:15,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:15,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:15,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:15,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:15,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:15,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 39 transitions, 260 flow. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:15,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:15,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:15,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:16,224 INFO L124 PetriNetUnfolderBase]: 476/816 cut-off events. [2024-06-27 16:31:16,224 INFO L125 PetriNetUnfolderBase]: For 1993/1993 co-relation queries the response was YES. [2024-06-27 16:31:16,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2862 conditions, 816 events. 476/816 cut-off events. For 1993/1993 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3476 event pairs, 231 based on Foata normal form. 1/817 useless extension candidates. Maximal degree in co-relation 2827. Up to 498 conditions per place. [2024-06-27 16:31:16,228 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 58 selfloop transitions, 15 changer transitions 6/80 dead transitions. [2024-06-27 16:31:16,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 80 transitions, 624 flow [2024-06-27 16:31:16,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2024-06-27 16:31:16,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-27 16:31:16,229 INFO L175 Difference]: Start difference. First operand has 56 places, 39 transitions, 260 flow. Second operand 9 states and 92 transitions. [2024-06-27 16:31:16,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 80 transitions, 624 flow [2024-06-27 16:31:16,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 80 transitions, 603 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 16:31:16,232 INFO L231 Difference]: Finished difference. Result has 60 places, 45 transitions, 348 flow [2024-06-27 16:31:16,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=348, PETRI_PLACES=60, PETRI_TRANSITIONS=45} [2024-06-27 16:31:16,233 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 34 predicate places. [2024-06-27 16:31:16,233 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 348 flow [2024-06-27 16:31:16,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:16,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:16,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:16,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 16:31:16,235 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:16,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:16,235 INFO L85 PathProgramCache]: Analyzing trace with hash 2087679896, now seen corresponding path program 3 times [2024-06-27 16:31:16,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:16,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280783664] [2024-06-27 16:31:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:16,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:31:16,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:16,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280783664] [2024-06-27 16:31:16,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280783664] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:16,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105521411] [2024-06-27 16:31:16,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:31:16,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:16,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:16,655 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) [2024-06-27 16:31:16,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 16:31:16,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-27 16:31:16,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:16,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 16:31:16,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:16,801 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-27 16:31:16,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2024-06-27 16:31:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:16,820 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:31:16,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105521411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:16,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:31:16,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2024-06-27 16:31:16,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289310316] [2024-06-27 16:31:16,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:16,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:31:16,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:16,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:31:16,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-06-27 16:31:16,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:16,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 45 transitions, 348 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:16,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:16,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:16,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:16,991 INFO L124 PetriNetUnfolderBase]: 536/934 cut-off events. [2024-06-27 16:31:16,991 INFO L125 PetriNetUnfolderBase]: For 2792/2792 co-relation queries the response was YES. [2024-06-27 16:31:16,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3564 conditions, 934 events. 536/934 cut-off events. For 2792/2792 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4273 event pairs, 231 based on Foata normal form. 1/935 useless extension candidates. Maximal degree in co-relation 3530. Up to 511 conditions per place. [2024-06-27 16:31:16,995 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 67 selfloop transitions, 17 changer transitions 6/91 dead transitions. [2024-06-27 16:31:16,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 91 transitions, 762 flow [2024-06-27 16:31:16,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:31:16,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:31:16,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-06-27 16:31:16,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4846938775510204 [2024-06-27 16:31:16,996 INFO L175 Difference]: Start difference. First operand has 60 places, 45 transitions, 348 flow. Second operand 7 states and 95 transitions. [2024-06-27 16:31:16,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 91 transitions, 762 flow [2024-06-27 16:31:16,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 91 transitions, 696 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 16:31:17,000 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 448 flow [2024-06-27 16:31:17,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=448, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2024-06-27 16:31:17,001 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 38 predicate places. [2024-06-27 16:31:17,001 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 448 flow [2024-06-27 16:31:17,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:17,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:17,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:17,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:17,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:17,213 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:17,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:17,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1149093434, now seen corresponding path program 4 times [2024-06-27 16:31:17,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:17,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619825420] [2024-06-27 16:31:17,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:17,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:31:17,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:17,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619825420] [2024-06-27 16:31:17,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619825420] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:17,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216057262] [2024-06-27 16:31:17,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:31:17,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:17,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:17,672 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) [2024-06-27 16:31:17,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 16:31:17,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:31:17,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:17,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:31:17,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:17,863 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-27 16:31:17,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2024-06-27 16:31:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:17,888 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:31:17,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216057262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:17,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:31:17,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 18 [2024-06-27 16:31:17,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385801567] [2024-06-27 16:31:17,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:17,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 16:31:17,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:17,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 16:31:17,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:31:17,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:17,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 448 flow. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:17,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:17,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:17,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:18,093 INFO L124 PetriNetUnfolderBase]: 546/954 cut-off events. [2024-06-27 16:31:18,093 INFO L125 PetriNetUnfolderBase]: For 3318/3318 co-relation queries the response was YES. [2024-06-27 16:31:18,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3804 conditions, 954 events. 546/954 cut-off events. For 3318/3318 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4411 event pairs, 235 based on Foata normal form. 1/954 useless extension candidates. Maximal degree in co-relation 3768. Up to 504 conditions per place. [2024-06-27 16:31:18,098 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 60 selfloop transitions, 26 changer transitions 6/93 dead transitions. [2024-06-27 16:31:18,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 93 transitions, 841 flow [2024-06-27 16:31:18,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:18,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:18,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-27 16:31:18,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 16:31:18,099 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 448 flow. Second operand 9 states and 96 transitions. [2024-06-27 16:31:18,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 93 transitions, 841 flow [2024-06-27 16:31:18,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 93 transitions, 819 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-27 16:31:18,104 INFO L231 Difference]: Finished difference. Result has 74 places, 61 transitions, 608 flow [2024-06-27 16:31:18,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=608, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2024-06-27 16:31:18,105 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 48 predicate places. [2024-06-27 16:31:18,105 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 608 flow [2024-06-27 16:31:18,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:18,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:18,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:18,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:18,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-06-27 16:31:18,316 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:18,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:18,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1085014060, now seen corresponding path program 5 times [2024-06-27 16:31:18,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:18,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603370267] [2024-06-27 16:31:18,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:18,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:18,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:18,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603370267] [2024-06-27 16:31:18,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603370267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:18,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:18,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:18,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532353636] [2024-06-27 16:31:18,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:18,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:18,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:18,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:18,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:18,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:18,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 61 transitions, 608 flow. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:18,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:18,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:18,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:18,819 INFO L124 PetriNetUnfolderBase]: 536/931 cut-off events. [2024-06-27 16:31:18,820 INFO L125 PetriNetUnfolderBase]: For 3914/3914 co-relation queries the response was YES. [2024-06-27 16:31:18,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4012 conditions, 931 events. 536/931 cut-off events. For 3914/3914 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4244 event pairs, 226 based on Foata normal form. 1/932 useless extension candidates. Maximal degree in co-relation 3971. Up to 504 conditions per place. [2024-06-27 16:31:18,824 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 61 selfloop transitions, 27 changer transitions 6/95 dead transitions. [2024-06-27 16:31:18,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 95 transitions, 943 flow [2024-06-27 16:31:18,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:18,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:18,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-27 16:31:18,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 16:31:18,825 INFO L175 Difference]: Start difference. First operand has 74 places, 61 transitions, 608 flow. Second operand 9 states and 96 transitions. [2024-06-27 16:31:18,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 95 transitions, 943 flow [2024-06-27 16:31:18,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 95 transitions, 895 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 16:31:18,831 INFO L231 Difference]: Finished difference. Result has 79 places, 63 transitions, 660 flow [2024-06-27 16:31:18,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=660, PETRI_PLACES=79, PETRI_TRANSITIONS=63} [2024-06-27 16:31:18,831 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 53 predicate places. [2024-06-27 16:31:18,832 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 63 transitions, 660 flow [2024-06-27 16:31:18,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:18,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:18,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:18,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 16:31:18,832 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:18,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:18,833 INFO L85 PathProgramCache]: Analyzing trace with hash 162132282, now seen corresponding path program 6 times [2024-06-27 16:31:18,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:18,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018524280] [2024-06-27 16:31:18,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:18,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:19,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:19,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:19,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018524280] [2024-06-27 16:31:19,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018524280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:19,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:19,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:19,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395217315] [2024-06-27 16:31:19,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:19,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:19,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:19,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:19,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:19,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:19,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 63 transitions, 660 flow. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:19,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:19,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:19,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:19,323 INFO L124 PetriNetUnfolderBase]: 539/938 cut-off events. [2024-06-27 16:31:19,324 INFO L125 PetriNetUnfolderBase]: For 4290/4290 co-relation queries the response was YES. [2024-06-27 16:31:19,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4099 conditions, 938 events. 539/938 cut-off events. For 4290/4290 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4299 event pairs, 231 based on Foata normal form. 1/939 useless extension candidates. Maximal degree in co-relation 4056. Up to 508 conditions per place. [2024-06-27 16:31:19,328 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 61 selfloop transitions, 27 changer transitions 6/95 dead transitions. [2024-06-27 16:31:19,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 95 transitions, 1005 flow [2024-06-27 16:31:19,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:19,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:19,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-27 16:31:19,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 16:31:19,329 INFO L175 Difference]: Start difference. First operand has 79 places, 63 transitions, 660 flow. Second operand 9 states and 96 transitions. [2024-06-27 16:31:19,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 95 transitions, 1005 flow [2024-06-27 16:31:19,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 95 transitions, 962 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 16:31:19,337 INFO L231 Difference]: Finished difference. Result has 83 places, 65 transitions, 720 flow [2024-06-27 16:31:19,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=720, PETRI_PLACES=83, PETRI_TRANSITIONS=65} [2024-06-27 16:31:19,338 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 57 predicate places. [2024-06-27 16:31:19,338 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 65 transitions, 720 flow [2024-06-27 16:31:19,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:19,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:19,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:19,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 16:31:19,339 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:19,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:19,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1761810430, now seen corresponding path program 7 times [2024-06-27 16:31:19,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:19,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719811037] [2024-06-27 16:31:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:19,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:19,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:19,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719811037] [2024-06-27 16:31:19,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719811037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:19,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:19,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:19,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247626610] [2024-06-27 16:31:19,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:19,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:19,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:19,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:19,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:19,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:19,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 65 transitions, 720 flow. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:19,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:19,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:19,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:19,860 INFO L124 PetriNetUnfolderBase]: 530/916 cut-off events. [2024-06-27 16:31:19,860 INFO L125 PetriNetUnfolderBase]: For 4335/4335 co-relation queries the response was YES. [2024-06-27 16:31:19,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4052 conditions, 916 events. 530/916 cut-off events. For 4335/4335 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4117 event pairs, 228 based on Foata normal form. 1/917 useless extension candidates. Maximal degree in co-relation 4008. Up to 508 conditions per place. [2024-06-27 16:31:19,868 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 58 selfloop transitions, 28 changer transitions 6/93 dead transitions. [2024-06-27 16:31:19,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 93 transitions, 1040 flow [2024-06-27 16:31:19,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:19,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:19,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 90 transitions. [2024-06-27 16:31:19,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-27 16:31:19,870 INFO L175 Difference]: Start difference. First operand has 83 places, 65 transitions, 720 flow. Second operand 9 states and 90 transitions. [2024-06-27 16:31:19,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 93 transitions, 1040 flow [2024-06-27 16:31:19,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 93 transitions, 966 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 16:31:19,877 INFO L231 Difference]: Finished difference. Result has 86 places, 67 transitions, 749 flow [2024-06-27 16:31:19,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=749, PETRI_PLACES=86, PETRI_TRANSITIONS=67} [2024-06-27 16:31:19,877 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 60 predicate places. [2024-06-27 16:31:19,877 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 67 transitions, 749 flow [2024-06-27 16:31:19,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:19,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:19,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:19,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 16:31:19,879 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:19,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:19,880 INFO L85 PathProgramCache]: Analyzing trace with hash -292405266, now seen corresponding path program 8 times [2024-06-27 16:31:19,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:19,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770344979] [2024-06-27 16:31:19,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:19,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:31:20,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:20,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770344979] [2024-06-27 16:31:20,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770344979] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:20,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652261061] [2024-06-27 16:31:20,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:31:20,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:20,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:20,180 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) [2024-06-27 16:31:20,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 16:31:20,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-27 16:31:20,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:20,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 16:31:20,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:20,354 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-27 16:31:20,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2024-06-27 16:31:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:20,387 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:31:20,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652261061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:20,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:31:20,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-06-27 16:31:20,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479102787] [2024-06-27 16:31:20,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:20,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:31:20,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:20,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:31:20,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-06-27 16:31:20,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:20,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 67 transitions, 749 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:20,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:20,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:20,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:20,569 INFO L124 PetriNetUnfolderBase]: 697/1206 cut-off events. [2024-06-27 16:31:20,569 INFO L125 PetriNetUnfolderBase]: For 5773/5773 co-relation queries the response was YES. [2024-06-27 16:31:20,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5355 conditions, 1206 events. 697/1206 cut-off events. For 5773/5773 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5764 event pairs, 270 based on Foata normal form. 1/1207 useless extension candidates. Maximal degree in co-relation 5309. Up to 699 conditions per place. [2024-06-27 16:31:20,578 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 88 selfloop transitions, 29 changer transitions 6/124 dead transitions. [2024-06-27 16:31:20,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 124 transitions, 1402 flow [2024-06-27 16:31:20,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:31:20,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:31:20,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-06-27 16:31:20,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-27 16:31:20,579 INFO L175 Difference]: Start difference. First operand has 86 places, 67 transitions, 749 flow. Second operand 7 states and 90 transitions. [2024-06-27 16:31:20,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 124 transitions, 1402 flow [2024-06-27 16:31:20,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 124 transitions, 1352 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 16:31:20,593 INFO L231 Difference]: Finished difference. Result has 90 places, 77 transitions, 934 flow [2024-06-27 16:31:20,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=934, PETRI_PLACES=90, PETRI_TRANSITIONS=77} [2024-06-27 16:31:20,594 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 64 predicate places. [2024-06-27 16:31:20,594 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 77 transitions, 934 flow [2024-06-27 16:31:20,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:20,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:20,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:20,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:20,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:20,807 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:20,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:20,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1659732378, now seen corresponding path program 9 times [2024-06-27 16:31:20,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:20,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173831783] [2024-06-27 16:31:20,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:20,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:31:21,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:21,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173831783] [2024-06-27 16:31:21,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173831783] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:21,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699383438] [2024-06-27 16:31:21,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:31:21,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:21,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:21,205 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) [2024-06-27 16:31:21,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 16:31:21,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-27 16:31:21,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:21,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 16:31:21,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:21,367 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-27 16:31:21,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2024-06-27 16:31:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:21,400 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:31:21,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699383438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:21,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:31:21,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2024-06-27 16:31:21,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576208865] [2024-06-27 16:31:21,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:21,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:31:21,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:21,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:31:21,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:31:21,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:21,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 77 transitions, 934 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:21,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:21,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:21,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:21,636 INFO L124 PetriNetUnfolderBase]: 693/1200 cut-off events. [2024-06-27 16:31:21,636 INFO L125 PetriNetUnfolderBase]: For 6946/6946 co-relation queries the response was YES. [2024-06-27 16:31:21,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5714 conditions, 1200 events. 693/1200 cut-off events. For 6946/6946 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5699 event pairs, 275 based on Foata normal form. 2/1201 useless extension candidates. Maximal degree in co-relation 5666. Up to 699 conditions per place. [2024-06-27 16:31:21,643 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 83 selfloop transitions, 29 changer transitions 7/120 dead transitions. [2024-06-27 16:31:21,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 120 transitions, 1468 flow [2024-06-27 16:31:21,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:31:21,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:31:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-06-27 16:31:21,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44387755102040816 [2024-06-27 16:31:21,644 INFO L175 Difference]: Start difference. First operand has 90 places, 77 transitions, 934 flow. Second operand 7 states and 87 transitions. [2024-06-27 16:31:21,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 120 transitions, 1468 flow [2024-06-27 16:31:21,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 120 transitions, 1395 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-27 16:31:21,655 INFO L231 Difference]: Finished difference. Result has 98 places, 86 transitions, 1110 flow [2024-06-27 16:31:21,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1110, PETRI_PLACES=98, PETRI_TRANSITIONS=86} [2024-06-27 16:31:21,655 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 72 predicate places. [2024-06-27 16:31:21,656 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 86 transitions, 1110 flow [2024-06-27 16:31:21,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:21,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:21,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:21,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:21,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:21,868 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:21,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:21,868 INFO L85 PathProgramCache]: Analyzing trace with hash -2015334144, now seen corresponding path program 10 times [2024-06-27 16:31:21,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:21,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459441788] [2024-06-27 16:31:21,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:21,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:31:22,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:22,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459441788] [2024-06-27 16:31:22,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459441788] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:22,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527788494] [2024-06-27 16:31:22,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:31:22,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:22,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:22,212 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) [2024-06-27 16:31:22,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 16:31:22,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:31:22,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:22,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:31:22,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:22,422 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-27 16:31:22,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2024-06-27 16:31:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:22,441 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:31:22,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527788494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:22,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:31:22,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2024-06-27 16:31:22,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812912989] [2024-06-27 16:31:22,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:22,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 16:31:22,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:22,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 16:31:22,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:31:22,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:22,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 86 transitions, 1110 flow. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:22,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:22,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:22,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:22,708 INFO L124 PetriNetUnfolderBase]: 707/1232 cut-off events. [2024-06-27 16:31:22,708 INFO L125 PetriNetUnfolderBase]: For 7695/7695 co-relation queries the response was YES. [2024-06-27 16:31:22,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6078 conditions, 1232 events. 707/1232 cut-off events. For 7695/7695 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5954 event pairs, 287 based on Foata normal form. 1/1232 useless extension candidates. Maximal degree in co-relation 6025. Up to 692 conditions per place. [2024-06-27 16:31:22,714 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 83 selfloop transitions, 34 changer transitions 6/124 dead transitions. [2024-06-27 16:31:22,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 124 transitions, 1580 flow [2024-06-27 16:31:22,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:22,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:22,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-27 16:31:22,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 16:31:22,716 INFO L175 Difference]: Start difference. First operand has 98 places, 86 transitions, 1110 flow. Second operand 9 states and 96 transitions. [2024-06-27 16:31:22,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 124 transitions, 1580 flow [2024-06-27 16:31:22,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 124 transitions, 1516 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-27 16:31:22,729 INFO L231 Difference]: Finished difference. Result has 107 places, 91 transitions, 1232 flow [2024-06-27 16:31:22,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1232, PETRI_PLACES=107, PETRI_TRANSITIONS=91} [2024-06-27 16:31:22,729 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 81 predicate places. [2024-06-27 16:31:22,729 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 91 transitions, 1232 flow [2024-06-27 16:31:22,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:22,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:22,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:22,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:22,944 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,SelfDestructingSolverStorable20 [2024-06-27 16:31:22,944 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:22,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:22,944 INFO L85 PathProgramCache]: Analyzing trace with hash -90853982, now seen corresponding path program 11 times [2024-06-27 16:31:22,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:22,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799586798] [2024-06-27 16:31:22,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:22,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:31:23,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:23,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799586798] [2024-06-27 16:31:23,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799586798] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:23,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225292326] [2024-06-27 16:31:23,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:31:23,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:23,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:23,284 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) [2024-06-27 16:31:23,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-27 16:31:23,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:31:23,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:23,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:31:23,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:23,446 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:31:23,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2024-06-27 16:31:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:23,463 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:31:23,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225292326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:23,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:31:23,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 13 [2024-06-27 16:31:23,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749731512] [2024-06-27 16:31:23,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:23,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:23,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:23,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:23,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:31:23,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:23,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 91 transitions, 1232 flow. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:23,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:23,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:23,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:23,688 INFO L124 PetriNetUnfolderBase]: 698/1210 cut-off events. [2024-06-27 16:31:23,689 INFO L125 PetriNetUnfolderBase]: For 8188/8188 co-relation queries the response was YES. [2024-06-27 16:31:23,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6095 conditions, 1210 events. 698/1210 cut-off events. For 8188/8188 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5774 event pairs, 279 based on Foata normal form. 1/1211 useless extension candidates. Maximal degree in co-relation 6038. Up to 692 conditions per place. [2024-06-27 16:31:23,695 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 83 selfloop transitions, 34 changer transitions 6/124 dead transitions. [2024-06-27 16:31:23,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 124 transitions, 1656 flow [2024-06-27 16:31:23,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:23,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:23,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-27 16:31:23,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 16:31:23,696 INFO L175 Difference]: Start difference. First operand has 107 places, 91 transitions, 1232 flow. Second operand 9 states and 96 transitions. [2024-06-27 16:31:23,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 124 transitions, 1656 flow [2024-06-27 16:31:23,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 124 transitions, 1598 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 16:31:23,709 INFO L231 Difference]: Finished difference. Result has 112 places, 93 transitions, 1295 flow [2024-06-27 16:31:23,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1179, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1295, PETRI_PLACES=112, PETRI_TRANSITIONS=93} [2024-06-27 16:31:23,710 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 86 predicate places. [2024-06-27 16:31:23,710 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 93 transitions, 1295 flow [2024-06-27 16:31:23,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:23,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:23,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:23,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:23,921 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,SelfDestructingSolverStorable21 [2024-06-27 16:31:23,921 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:23,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:23,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1802163952, now seen corresponding path program 12 times [2024-06-27 16:31:23,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:23,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478900181] [2024-06-27 16:31:23,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:23,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:23,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:24,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:24,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478900181] [2024-06-27 16:31:24,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478900181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:24,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:24,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 16:31:24,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024767103] [2024-06-27 16:31:24,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:24,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 16:31:24,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:24,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 16:31:24,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 16:31:24,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:24,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 93 transitions, 1295 flow. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:24,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:24,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:24,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:24,343 INFO L124 PetriNetUnfolderBase]: 689/1188 cut-off events. [2024-06-27 16:31:24,343 INFO L125 PetriNetUnfolderBase]: For 8166/8166 co-relation queries the response was YES. [2024-06-27 16:31:24,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6100 conditions, 1188 events. 689/1188 cut-off events. For 8166/8166 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5594 event pairs, 166 based on Foata normal form. 1/1189 useless extension candidates. Maximal degree in co-relation 6041. Up to 687 conditions per place. [2024-06-27 16:31:24,349 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 83 selfloop transitions, 33 changer transitions 6/123 dead transitions. [2024-06-27 16:31:24,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 123 transitions, 1678 flow [2024-06-27 16:31:24,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:31:24,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:31:24,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 93 transitions. [2024-06-27 16:31:24,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33214285714285713 [2024-06-27 16:31:24,350 INFO L175 Difference]: Start difference. First operand has 112 places, 93 transitions, 1295 flow. Second operand 10 states and 93 transitions. [2024-06-27 16:31:24,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 123 transitions, 1678 flow [2024-06-27 16:31:24,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 123 transitions, 1615 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 16:31:24,362 INFO L231 Difference]: Finished difference. Result has 117 places, 93 transitions, 1310 flow [2024-06-27 16:31:24,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1235, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1310, PETRI_PLACES=117, PETRI_TRANSITIONS=93} [2024-06-27 16:31:24,362 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 91 predicate places. [2024-06-27 16:31:24,362 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 93 transitions, 1310 flow [2024-06-27 16:31:24,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:24,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:24,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:24,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 16:31:24,363 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:24,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:24,364 INFO L85 PathProgramCache]: Analyzing trace with hash -127577951, now seen corresponding path program 1 times [2024-06-27 16:31:24,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:24,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187171068] [2024-06-27 16:31:24,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:24,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:24,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:24,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187171068] [2024-06-27 16:31:24,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187171068] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:24,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297428406] [2024-06-27 16:31:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:24,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:24,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:24,529 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) [2024-06-27 16:31:24,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-06-27 16:31:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:24,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 16:31:24,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:24,639 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-06-27 16:31:24,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-06-27 16:31:24,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:24,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:24,703 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-27 16:31:24,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-06-27 16:31:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:24,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297428406] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:31:24,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:31:24,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2024-06-27 16:31:24,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213809242] [2024-06-27 16:31:24,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:31:24,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:31:24,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:24,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:31:24,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:31:24,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:24,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 93 transitions, 1310 flow. Second operand has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:24,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:24,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:24,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:24,978 INFO L124 PetriNetUnfolderBase]: 720/1236 cut-off events. [2024-06-27 16:31:24,978 INFO L125 PetriNetUnfolderBase]: For 8972/8972 co-relation queries the response was YES. [2024-06-27 16:31:24,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6368 conditions, 1236 events. 720/1236 cut-off events. For 8972/8972 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6101 event pairs, 88 based on Foata normal form. 14/1250 useless extension candidates. Maximal degree in co-relation 6307. Up to 643 conditions per place. [2024-06-27 16:31:24,985 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 104 selfloop transitions, 40 changer transitions 0/145 dead transitions. [2024-06-27 16:31:24,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 145 transitions, 1929 flow [2024-06-27 16:31:24,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:31:24,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:31:24,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-27 16:31:24,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-27 16:31:24,986 INFO L175 Difference]: Start difference. First operand has 117 places, 93 transitions, 1310 flow. Second operand 10 states and 106 transitions. [2024-06-27 16:31:24,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 145 transitions, 1929 flow [2024-06-27 16:31:24,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 145 transitions, 1870 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 16:31:25,000 INFO L231 Difference]: Finished difference. Result has 119 places, 95 transitions, 1374 flow [2024-06-27 16:31:25,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1374, PETRI_PLACES=119, PETRI_TRANSITIONS=95} [2024-06-27 16:31:25,000 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 93 predicate places. [2024-06-27 16:31:25,001 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 95 transitions, 1374 flow [2024-06-27 16:31:25,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:25,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:25,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:25,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:25,212 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,SelfDestructingSolverStorable23 [2024-06-27 16:31:25,212 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:25,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:25,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1112436069, now seen corresponding path program 1 times [2024-06-27 16:31:25,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:25,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752640568] [2024-06-27 16:31:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:25,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:25,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:25,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752640568] [2024-06-27 16:31:25,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752640568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:25,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:25,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:25,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194307564] [2024-06-27 16:31:25,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:25,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:25,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:25,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:25,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:25,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:25,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 95 transitions, 1374 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:25,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:25,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:25,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:25,693 INFO L124 PetriNetUnfolderBase]: 780/1352 cut-off events. [2024-06-27 16:31:25,693 INFO L125 PetriNetUnfolderBase]: For 10294/10294 co-relation queries the response was YES. [2024-06-27 16:31:25,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7177 conditions, 1352 events. 780/1352 cut-off events. For 10294/10294 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6700 event pairs, 327 based on Foata normal form. 12/1364 useless extension candidates. Maximal degree in co-relation 7117. Up to 764 conditions per place. [2024-06-27 16:31:25,699 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 91 selfloop transitions, 43 changer transitions 0/135 dead transitions. [2024-06-27 16:31:25,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 135 transitions, 1876 flow [2024-06-27 16:31:25,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:25,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:25,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2024-06-27 16:31:25,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 16:31:25,701 INFO L175 Difference]: Start difference. First operand has 119 places, 95 transitions, 1374 flow. Second operand 9 states and 104 transitions. [2024-06-27 16:31:25,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 135 transitions, 1876 flow [2024-06-27 16:31:25,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 135 transitions, 1764 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 16:31:25,715 INFO L231 Difference]: Finished difference. Result has 122 places, 98 transitions, 1417 flow [2024-06-27 16:31:25,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1417, PETRI_PLACES=122, PETRI_TRANSITIONS=98} [2024-06-27 16:31:25,717 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 96 predicate places. [2024-06-27 16:31:25,717 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 98 transitions, 1417 flow [2024-06-27 16:31:25,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:25,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:25,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:25,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 16:31:25,718 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:25,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:25,718 INFO L85 PathProgramCache]: Analyzing trace with hash -226551663, now seen corresponding path program 2 times [2024-06-27 16:31:25,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:25,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258789554] [2024-06-27 16:31:25,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:25,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:25,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:25,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:25,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258789554] [2024-06-27 16:31:25,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258789554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:25,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:25,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:25,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447714863] [2024-06-27 16:31:25,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:25,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:25,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:25,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:25,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:25,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:25,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 98 transitions, 1417 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:25,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:25,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:25,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:26,184 INFO L124 PetriNetUnfolderBase]: 775/1347 cut-off events. [2024-06-27 16:31:26,184 INFO L125 PetriNetUnfolderBase]: For 9180/9180 co-relation queries the response was YES. [2024-06-27 16:31:26,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7047 conditions, 1347 events. 775/1347 cut-off events. For 9180/9180 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6793 event pairs, 290 based on Foata normal form. 5/1352 useless extension candidates. Maximal degree in co-relation 6987. Up to 764 conditions per place. [2024-06-27 16:31:26,192 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 88 selfloop transitions, 39 changer transitions 10/138 dead transitions. [2024-06-27 16:31:26,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 138 transitions, 1892 flow [2024-06-27 16:31:26,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:26,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:26,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 93 transitions. [2024-06-27 16:31:26,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-27 16:31:26,193 INFO L175 Difference]: Start difference. First operand has 122 places, 98 transitions, 1417 flow. Second operand 9 states and 93 transitions. [2024-06-27 16:31:26,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 138 transitions, 1892 flow [2024-06-27 16:31:26,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 138 transitions, 1816 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 16:31:26,209 INFO L231 Difference]: Finished difference. Result has 125 places, 96 transitions, 1377 flow [2024-06-27 16:31:26,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1321, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1377, PETRI_PLACES=125, PETRI_TRANSITIONS=96} [2024-06-27 16:31:26,210 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 99 predicate places. [2024-06-27 16:31:26,210 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 96 transitions, 1377 flow [2024-06-27 16:31:26,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:26,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:26,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:26,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 16:31:26,211 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:26,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:26,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1851301303, now seen corresponding path program 3 times [2024-06-27 16:31:26,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:26,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646830663] [2024-06-27 16:31:26,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:26,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:26,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:26,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646830663] [2024-06-27 16:31:26,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646830663] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:26,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802675907] [2024-06-27 16:31:26,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:31:26,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:26,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:26,449 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) [2024-06-27 16:31:26,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-06-27 16:31:26,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:31:26,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:26,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:31:26,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:26,601 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:31:26,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 16:31:26,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:26,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:26,713 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-27 16:31:26,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-06-27 16:31:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:26,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802675907] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:26,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:31:26,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 18 [2024-06-27 16:31:26,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307151097] [2024-06-27 16:31:26,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:26,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:31:26,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:26,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:31:26,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:31:26,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:26,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 96 transitions, 1377 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:26,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:26,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:26,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:27,013 INFO L124 PetriNetUnfolderBase]: 813/1423 cut-off events. [2024-06-27 16:31:27,013 INFO L125 PetriNetUnfolderBase]: For 9465/9465 co-relation queries the response was YES. [2024-06-27 16:31:27,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7365 conditions, 1423 events. 813/1423 cut-off events. For 9465/9465 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7261 event pairs, 312 based on Foata normal form. 12/1435 useless extension candidates. Maximal degree in co-relation 7305. Up to 783 conditions per place. [2024-06-27 16:31:27,024 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 102 selfloop transitions, 38 changer transitions 0/141 dead transitions. [2024-06-27 16:31:27,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 141 transitions, 1915 flow [2024-06-27 16:31:27,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:31:27,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:31:27,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-06-27 16:31:27,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-27 16:31:27,026 INFO L175 Difference]: Start difference. First operand has 125 places, 96 transitions, 1377 flow. Second operand 7 states and 96 transitions. [2024-06-27 16:31:27,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 141 transitions, 1915 flow [2024-06-27 16:31:27,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 141 transitions, 1805 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 16:31:27,041 INFO L231 Difference]: Finished difference. Result has 123 places, 99 transitions, 1416 flow [2024-06-27 16:31:27,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1416, PETRI_PLACES=123, PETRI_TRANSITIONS=99} [2024-06-27 16:31:27,041 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 97 predicate places. [2024-06-27 16:31:27,042 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 99 transitions, 1416 flow [2024-06-27 16:31:27,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:27,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:27,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:27,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:27,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:27,252 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:27,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:27,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1511752797, now seen corresponding path program 2 times [2024-06-27 16:31:27,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:27,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503757176] [2024-06-27 16:31:27,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:27,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:27,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:27,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503757176] [2024-06-27 16:31:27,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503757176] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:27,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191300297] [2024-06-27 16:31:27,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:31:27,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:27,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:27,453 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) [2024-06-27 16:31:27,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-06-27 16:31:27,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:31:27,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:27,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:31:27,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:27,608 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:31:27,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-06-27 16:31:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:27,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:27,691 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-27 16:31:27,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-06-27 16:31:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:27,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191300297] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:31:27,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:31:27,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-06-27 16:31:27,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118676962] [2024-06-27 16:31:27,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:31:27,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:31:27,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:27,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:31:27,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:31:27,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:27,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 99 transitions, 1416 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:27,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:27,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:27,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:28,188 INFO L124 PetriNetUnfolderBase]: 1183/2066 cut-off events. [2024-06-27 16:31:28,189 INFO L125 PetriNetUnfolderBase]: For 11755/11755 co-relation queries the response was YES. [2024-06-27 16:31:28,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9862 conditions, 2066 events. 1183/2066 cut-off events. For 11755/11755 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11403 event pairs, 396 based on Foata normal form. 14/2079 useless extension candidates. Maximal degree in co-relation 9803. Up to 730 conditions per place. [2024-06-27 16:31:28,200 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 124 selfloop transitions, 51 changer transitions 0/176 dead transitions. [2024-06-27 16:31:28,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 176 transitions, 2245 flow [2024-06-27 16:31:28,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:31:28,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:31:28,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-27 16:31:28,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 16:31:28,202 INFO L175 Difference]: Start difference. First operand has 123 places, 99 transitions, 1416 flow. Second operand 12 states and 139 transitions. [2024-06-27 16:31:28,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 176 transitions, 2245 flow [2024-06-27 16:31:28,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 176 transitions, 2204 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 16:31:28,220 INFO L231 Difference]: Finished difference. Result has 136 places, 107 transitions, 1618 flow [2024-06-27 16:31:28,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1618, PETRI_PLACES=136, PETRI_TRANSITIONS=107} [2024-06-27 16:31:28,220 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 110 predicate places. [2024-06-27 16:31:28,221 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 107 transitions, 1618 flow [2024-06-27 16:31:28,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:28,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:28,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:28,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:28,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-06-27 16:31:28,432 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:28,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:28,433 INFO L85 PathProgramCache]: Analyzing trace with hash -2049108817, now seen corresponding path program 4 times [2024-06-27 16:31:28,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:28,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956133181] [2024-06-27 16:31:28,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:28,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:28,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:28,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956133181] [2024-06-27 16:31:28,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956133181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:28,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:28,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:28,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721499386] [2024-06-27 16:31:28,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:28,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:28,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:28,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:28,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:28,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:28,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 107 transitions, 1618 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:28,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:28,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:28,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:28,942 INFO L124 PetriNetUnfolderBase]: 1178/2061 cut-off events. [2024-06-27 16:31:28,943 INFO L125 PetriNetUnfolderBase]: For 14382/14382 co-relation queries the response was YES. [2024-06-27 16:31:28,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10411 conditions, 2061 events. 1178/2061 cut-off events. For 14382/14382 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11329 event pairs, 600 based on Foata normal form. 5/2066 useless extension candidates. Maximal degree in co-relation 10346. Up to 1412 conditions per place. [2024-06-27 16:31:28,954 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 89 selfloop transitions, 43 changer transitions 4/137 dead transitions. [2024-06-27 16:31:28,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 137 transitions, 2022 flow [2024-06-27 16:31:28,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:28,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:28,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 90 transitions. [2024-06-27 16:31:28,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-27 16:31:28,955 INFO L175 Difference]: Start difference. First operand has 136 places, 107 transitions, 1618 flow. Second operand 9 states and 90 transitions. [2024-06-27 16:31:28,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 137 transitions, 2022 flow [2024-06-27 16:31:28,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 137 transitions, 1930 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 16:31:28,978 INFO L231 Difference]: Finished difference. Result has 136 places, 105 transitions, 1574 flow [2024-06-27 16:31:28,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1574, PETRI_PLACES=136, PETRI_TRANSITIONS=105} [2024-06-27 16:31:28,979 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 110 predicate places. [2024-06-27 16:31:28,979 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 105 transitions, 1574 flow [2024-06-27 16:31:28,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:28,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:28,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:28,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 16:31:28,980 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:28,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:28,980 INFO L85 PathProgramCache]: Analyzing trace with hash 2058021563, now seen corresponding path program 3 times [2024-06-27 16:31:28,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:28,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901771454] [2024-06-27 16:31:28,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:28,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:29,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:29,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901771454] [2024-06-27 16:31:29,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901771454] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:29,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640715403] [2024-06-27 16:31:29,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:31:29,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:29,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:29,215 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) [2024-06-27 16:31:29,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-06-27 16:31:29,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:31:29,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:29,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:31:29,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:29,369 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:31:29,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 16:31:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:29,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:29,463 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-27 16:31:29,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-06-27 16:31:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:29,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640715403] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:31:29,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:31:29,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-06-27 16:31:29,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209331592] [2024-06-27 16:31:29,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:31:29,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:31:29,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:29,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:31:29,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:31:29,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:29,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 105 transitions, 1574 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:29,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:29,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:29,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:30,019 INFO L124 PetriNetUnfolderBase]: 1265/2229 cut-off events. [2024-06-27 16:31:30,020 INFO L125 PetriNetUnfolderBase]: For 13993/13993 co-relation queries the response was YES. [2024-06-27 16:31:30,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10706 conditions, 2229 events. 1265/2229 cut-off events. For 13993/13993 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12518 event pairs, 496 based on Foata normal form. 21/2250 useless extension candidates. Maximal degree in co-relation 10643. Up to 1016 conditions per place. [2024-06-27 16:31:30,032 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 128 selfloop transitions, 57 changer transitions 0/186 dead transitions. [2024-06-27 16:31:30,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 186 transitions, 2396 flow [2024-06-27 16:31:30,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 16:31:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 16:31:30,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 155 transitions. [2024-06-27 16:31:30,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-27 16:31:30,033 INFO L175 Difference]: Start difference. First operand has 136 places, 105 transitions, 1574 flow. Second operand 15 states and 155 transitions. [2024-06-27 16:31:30,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 186 transitions, 2396 flow [2024-06-27 16:31:30,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 186 transitions, 2331 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 16:31:30,056 INFO L231 Difference]: Finished difference. Result has 149 places, 115 transitions, 1774 flow [2024-06-27 16:31:30,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1774, PETRI_PLACES=149, PETRI_TRANSITIONS=115} [2024-06-27 16:31:30,057 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 123 predicate places. [2024-06-27 16:31:30,057 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 115 transitions, 1774 flow [2024-06-27 16:31:30,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:30,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:30,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:30,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:30,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:30,268 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:30,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:30,269 INFO L85 PathProgramCache]: Analyzing trace with hash 218597905, now seen corresponding path program 5 times [2024-06-27 16:31:30,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:30,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370378363] [2024-06-27 16:31:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:30,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:30,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:30,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:30,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370378363] [2024-06-27 16:31:30,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370378363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:30,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:30,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:30,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473857541] [2024-06-27 16:31:30,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:30,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:30,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:30,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:30,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:30,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:30,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 115 transitions, 1774 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:30,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:30,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:30,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:30,780 INFO L124 PetriNetUnfolderBase]: 1230/2158 cut-off events. [2024-06-27 16:31:30,780 INFO L125 PetriNetUnfolderBase]: For 14831/14831 co-relation queries the response was YES. [2024-06-27 16:31:30,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10804 conditions, 2158 events. 1230/2158 cut-off events. For 14831/14831 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11997 event pairs, 654 based on Foata normal form. 5/2163 useless extension candidates. Maximal degree in co-relation 10736. Up to 1584 conditions per place. [2024-06-27 16:31:30,793 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 98 selfloop transitions, 40 changer transitions 8/147 dead transitions. [2024-06-27 16:31:30,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 147 transitions, 2203 flow [2024-06-27 16:31:30,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:30,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:30,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2024-06-27 16:31:30,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3611111111111111 [2024-06-27 16:31:30,794 INFO L175 Difference]: Start difference. First operand has 149 places, 115 transitions, 1774 flow. Second operand 9 states and 91 transitions. [2024-06-27 16:31:30,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 147 transitions, 2203 flow [2024-06-27 16:31:30,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 147 transitions, 2118 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-27 16:31:30,820 INFO L231 Difference]: Finished difference. Result has 147 places, 112 transitions, 1720 flow [2024-06-27 16:31:30,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1666, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1720, PETRI_PLACES=147, PETRI_TRANSITIONS=112} [2024-06-27 16:31:30,821 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 121 predicate places. [2024-06-27 16:31:30,821 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 112 transitions, 1720 flow [2024-06-27 16:31:30,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:30,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:30,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:30,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 16:31:30,821 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:30,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:30,822 INFO L85 PathProgramCache]: Analyzing trace with hash -207171743, now seen corresponding path program 4 times [2024-06-27 16:31:30,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:30,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759123084] [2024-06-27 16:31:30,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:30,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:30,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:30,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759123084] [2024-06-27 16:31:30,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759123084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:30,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:30,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:30,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176330048] [2024-06-27 16:31:30,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:30,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:30,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:30,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:30,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:30,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:30,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 112 transitions, 1720 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:30,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:30,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:30,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:31,291 INFO L124 PetriNetUnfolderBase]: 1180/2047 cut-off events. [2024-06-27 16:31:31,291 INFO L125 PetriNetUnfolderBase]: For 14853/14853 co-relation queries the response was YES. [2024-06-27 16:31:31,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10497 conditions, 2047 events. 1180/2047 cut-off events. For 14853/14853 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11064 event pairs, 605 based on Foata normal form. 4/2051 useless extension candidates. Maximal degree in co-relation 10430. Up to 1493 conditions per place. [2024-06-27 16:31:31,302 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 96 selfloop transitions, 40 changer transitions 3/140 dead transitions. [2024-06-27 16:31:31,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 140 transitions, 2124 flow [2024-06-27 16:31:31,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:31,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:31,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-06-27 16:31:31,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3412698412698413 [2024-06-27 16:31:31,303 INFO L175 Difference]: Start difference. First operand has 147 places, 112 transitions, 1720 flow. Second operand 9 states and 86 transitions. [2024-06-27 16:31:31,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 140 transitions, 2124 flow [2024-06-27 16:31:31,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 140 transitions, 2019 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 16:31:31,328 INFO L231 Difference]: Finished difference. Result has 143 places, 110 transitions, 1651 flow [2024-06-27 16:31:31,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1651, PETRI_PLACES=143, PETRI_TRANSITIONS=110} [2024-06-27 16:31:31,328 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 117 predicate places. [2024-06-27 16:31:31,328 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 110 transitions, 1651 flow [2024-06-27 16:31:31,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:31,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:31,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:31,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 16:31:31,329 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:31,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:31,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1115061845, now seen corresponding path program 6 times [2024-06-27 16:31:31,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:31,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977940265] [2024-06-27 16:31:31,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:31,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:31,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:31,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977940265] [2024-06-27 16:31:31,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977940265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:31,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:31,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:31,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697112601] [2024-06-27 16:31:31,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:31,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:31,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:31,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:31,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:31,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:31,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 110 transitions, 1651 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:31,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:31,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:31,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:31,826 INFO L124 PetriNetUnfolderBase]: 1203/2080 cut-off events. [2024-06-27 16:31:31,826 INFO L125 PetriNetUnfolderBase]: For 17011/17011 co-relation queries the response was YES. [2024-06-27 16:31:31,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10786 conditions, 2080 events. 1203/2080 cut-off events. For 17011/17011 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11201 event pairs, 640 based on Foata normal form. 12/2092 useless extension candidates. Maximal degree in co-relation 10720. Up to 1507 conditions per place. [2024-06-27 16:31:31,836 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 97 selfloop transitions, 44 changer transitions 0/142 dead transitions. [2024-06-27 16:31:31,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 142 transitions, 2154 flow [2024-06-27 16:31:31,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:31,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:31,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-27 16:31:31,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 16:31:31,837 INFO L175 Difference]: Start difference. First operand has 143 places, 110 transitions, 1651 flow. Second operand 9 states and 96 transitions. [2024-06-27 16:31:31,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 142 transitions, 2154 flow [2024-06-27 16:31:31,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 142 transitions, 2066 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 16:31:31,863 INFO L231 Difference]: Finished difference. Result has 145 places, 116 transitions, 1801 flow [2024-06-27 16:31:31,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1571, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1801, PETRI_PLACES=145, PETRI_TRANSITIONS=116} [2024-06-27 16:31:31,864 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 119 predicate places. [2024-06-27 16:31:31,864 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 116 transitions, 1801 flow [2024-06-27 16:31:31,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:31,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:31,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:31,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 16:31:31,864 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:31,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:31,865 INFO L85 PathProgramCache]: Analyzing trace with hash -102369313, now seen corresponding path program 7 times [2024-06-27 16:31:31,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:31,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416969734] [2024-06-27 16:31:31,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:31,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:32,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:32,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416969734] [2024-06-27 16:31:32,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416969734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:32,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:32,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:32,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455893857] [2024-06-27 16:31:32,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:32,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:32,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:32,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:32,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:32,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:32,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 116 transitions, 1801 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:32,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:32,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:32,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:32,402 INFO L124 PetriNetUnfolderBase]: 1191/2068 cut-off events. [2024-06-27 16:31:32,402 INFO L125 PetriNetUnfolderBase]: For 16391/16391 co-relation queries the response was YES. [2024-06-27 16:31:32,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10634 conditions, 2068 events. 1191/2068 cut-off events. For 16391/16391 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11189 event pairs, 631 based on Foata normal form. 12/2080 useless extension candidates. Maximal degree in co-relation 10565. Up to 1507 conditions per place. [2024-06-27 16:31:32,412 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 97 selfloop transitions, 44 changer transitions 0/142 dead transitions. [2024-06-27 16:31:32,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 142 transitions, 2194 flow [2024-06-27 16:31:32,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:32,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:32,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-27 16:31:32,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 16:31:32,414 INFO L175 Difference]: Start difference. First operand has 145 places, 116 transitions, 1801 flow. Second operand 9 states and 96 transitions. [2024-06-27 16:31:32,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 142 transitions, 2194 flow [2024-06-27 16:31:32,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 142 transitions, 2141 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 16:31:32,437 INFO L231 Difference]: Finished difference. Result has 151 places, 117 transitions, 1870 flow [2024-06-27 16:31:32,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1749, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1870, PETRI_PLACES=151, PETRI_TRANSITIONS=117} [2024-06-27 16:31:32,438 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 125 predicate places. [2024-06-27 16:31:32,438 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 117 transitions, 1870 flow [2024-06-27 16:31:32,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:32,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:32,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:32,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 16:31:32,438 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:32,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:32,439 INFO L85 PathProgramCache]: Analyzing trace with hash -543607039, now seen corresponding path program 8 times [2024-06-27 16:31:32,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:32,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740229727] [2024-06-27 16:31:32,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:32,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:32,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:32,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740229727] [2024-06-27 16:31:32,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740229727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:32,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:32,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:32,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421383092] [2024-06-27 16:31:32,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:32,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:32,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:32,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:32,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:32,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:32,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 117 transitions, 1870 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:32,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:32,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:32,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:32,952 INFO L124 PetriNetUnfolderBase]: 1191/2073 cut-off events. [2024-06-27 16:31:32,952 INFO L125 PetriNetUnfolderBase]: For 16293/16293 co-relation queries the response was YES. [2024-06-27 16:31:32,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10692 conditions, 2073 events. 1191/2073 cut-off events. For 16293/16293 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11243 event pairs, 630 based on Foata normal form. 5/2078 useless extension candidates. Maximal degree in co-relation 10621. Up to 1507 conditions per place. [2024-06-27 16:31:32,963 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 91 selfloop transitions, 44 changer transitions 4/140 dead transitions. [2024-06-27 16:31:32,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 140 transitions, 2220 flow [2024-06-27 16:31:32,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:32,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:32,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2024-06-27 16:31:32,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-27 16:31:32,966 INFO L175 Difference]: Start difference. First operand has 151 places, 117 transitions, 1870 flow. Second operand 9 states and 92 transitions. [2024-06-27 16:31:32,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 140 transitions, 2220 flow [2024-06-27 16:31:32,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 140 transitions, 2115 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 16:31:32,993 INFO L231 Difference]: Finished difference. Result has 152 places, 116 transitions, 1830 flow [2024-06-27 16:31:32,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1765, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1830, PETRI_PLACES=152, PETRI_TRANSITIONS=116} [2024-06-27 16:31:32,993 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 126 predicate places. [2024-06-27 16:31:32,994 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 116 transitions, 1830 flow [2024-06-27 16:31:32,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:32,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:32,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:32,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 16:31:32,994 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:32,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:32,995 INFO L85 PathProgramCache]: Analyzing trace with hash 469085493, now seen corresponding path program 9 times [2024-06-27 16:31:32,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:32,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982209158] [2024-06-27 16:31:32,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:32,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:33,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:33,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982209158] [2024-06-27 16:31:33,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982209158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:33,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:33,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:33,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919650319] [2024-06-27 16:31:33,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:33,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:33,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:33,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:33,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:33,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:33,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 116 transitions, 1830 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:33,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:33,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:33,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:33,526 INFO L124 PetriNetUnfolderBase]: 1184/2061 cut-off events. [2024-06-27 16:31:33,526 INFO L125 PetriNetUnfolderBase]: For 15516/15516 co-relation queries the response was YES. [2024-06-27 16:31:33,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10546 conditions, 2061 events. 1184/2061 cut-off events. For 15516/15516 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11188 event pairs, 631 based on Foata normal form. 5/2066 useless extension candidates. Maximal degree in co-relation 10476. Up to 1507 conditions per place. [2024-06-27 16:31:33,537 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 91 selfloop transitions, 41 changer transitions 4/137 dead transitions. [2024-06-27 16:31:33,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 137 transitions, 2149 flow [2024-06-27 16:31:33,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:33,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:33,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2024-06-27 16:31:33,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-27 16:31:33,540 INFO L175 Difference]: Start difference. First operand has 152 places, 116 transitions, 1830 flow. Second operand 9 states and 92 transitions. [2024-06-27 16:31:33,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 137 transitions, 2149 flow [2024-06-27 16:31:33,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 137 transitions, 2063 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 16:31:33,568 INFO L231 Difference]: Finished difference. Result has 152 places, 114 transitions, 1785 flow [2024-06-27 16:31:33,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1785, PETRI_PLACES=152, PETRI_TRANSITIONS=114} [2024-06-27 16:31:33,568 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 126 predicate places. [2024-06-27 16:31:33,568 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 114 transitions, 1785 flow [2024-06-27 16:31:33,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:33,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:33,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:33,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 16:31:33,569 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:33,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:33,569 INFO L85 PathProgramCache]: Analyzing trace with hash -600675833, now seen corresponding path program 5 times [2024-06-27 16:31:33,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:33,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569480019] [2024-06-27 16:31:33,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:33,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:33,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:33,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569480019] [2024-06-27 16:31:33,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569480019] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:33,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693212519] [2024-06-27 16:31:33,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:31:33,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:33,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:33,772 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) [2024-06-27 16:31:33,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-06-27 16:31:33,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:31:33,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:33,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:31:33,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:34,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:34,098 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:31:34,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 16:31:34,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:34,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693212519] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:31:34,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:31:34,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-06-27 16:31:34,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416679710] [2024-06-27 16:31:34,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:31:34,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 16:31:34,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:34,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 16:31:34,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2024-06-27 16:31:34,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:34,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 114 transitions, 1785 flow. Second operand has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 21 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) [2024-06-27 16:31:34,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:34,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:34,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:34,624 INFO L124 PetriNetUnfolderBase]: 1266/2220 cut-off events. [2024-06-27 16:31:34,624 INFO L125 PetriNetUnfolderBase]: For 17318/17318 co-relation queries the response was YES. [2024-06-27 16:31:34,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11312 conditions, 2220 events. 1266/2220 cut-off events. For 17318/17318 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12370 event pairs, 598 based on Foata normal form. 21/2241 useless extension candidates. Maximal degree in co-relation 11242. Up to 1437 conditions per place. [2024-06-27 16:31:34,635 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 111 selfloop transitions, 43 changer transitions 0/155 dead transitions. [2024-06-27 16:31:34,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 155 transitions, 2334 flow [2024-06-27 16:31:34,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:31:34,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:31:34,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-27 16:31:34,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2024-06-27 16:31:34,638 INFO L175 Difference]: Start difference. First operand has 152 places, 114 transitions, 1785 flow. Second operand 10 states and 109 transitions. [2024-06-27 16:31:34,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 155 transitions, 2334 flow [2024-06-27 16:31:34,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 155 transitions, 2237 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 16:31:34,666 INFO L231 Difference]: Finished difference. Result has 153 places, 117 transitions, 1842 flow [2024-06-27 16:31:34,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1842, PETRI_PLACES=153, PETRI_TRANSITIONS=117} [2024-06-27 16:31:34,667 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 127 predicate places. [2024-06-27 16:31:34,667 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 117 transitions, 1842 flow [2024-06-27 16:31:34,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 21 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) [2024-06-27 16:31:34,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:34,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:34,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:34,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-06-27 16:31:34,873 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:34,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:34,873 INFO L85 PathProgramCache]: Analyzing trace with hash -68770085, now seen corresponding path program 10 times [2024-06-27 16:31:34,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:34,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790533905] [2024-06-27 16:31:34,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:34,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:35,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:35,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790533905] [2024-06-27 16:31:35,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790533905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:35,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:35,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:35,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454280982] [2024-06-27 16:31:35,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:35,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:35,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:35,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:35,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:35,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:35,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 117 transitions, 1842 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:35,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:35,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:35,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:35,402 INFO L124 PetriNetUnfolderBase]: 1231/2149 cut-off events. [2024-06-27 16:31:35,402 INFO L125 PetriNetUnfolderBase]: For 17694/17694 co-relation queries the response was YES. [2024-06-27 16:31:35,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11243 conditions, 2149 events. 1231/2149 cut-off events. For 17694/17694 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11786 event pairs, 682 based on Foata normal form. 5/2154 useless extension candidates. Maximal degree in co-relation 11170. Up to 1670 conditions per place. [2024-06-27 16:31:35,411 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 92 selfloop transitions, 37 changer transitions 8/138 dead transitions. [2024-06-27 16:31:35,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 138 transitions, 2164 flow [2024-06-27 16:31:35,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:35,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:35,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 89 transitions. [2024-06-27 16:31:35,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3531746031746032 [2024-06-27 16:31:35,415 INFO L175 Difference]: Start difference. First operand has 153 places, 117 transitions, 1842 flow. Second operand 9 states and 89 transitions. [2024-06-27 16:31:35,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 138 transitions, 2164 flow [2024-06-27 16:31:35,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 138 transitions, 2091 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 16:31:35,440 INFO L231 Difference]: Finished difference. Result has 155 places, 114 transitions, 1788 flow [2024-06-27 16:31:35,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1748, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1788, PETRI_PLACES=155, PETRI_TRANSITIONS=114} [2024-06-27 16:31:35,441 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 129 predicate places. [2024-06-27 16:31:35,441 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 114 transitions, 1788 flow [2024-06-27 16:31:35,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:35,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:35,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:35,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 16:31:35,441 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:35,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:35,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1383104487, now seen corresponding path program 6 times [2024-06-27 16:31:35,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:35,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787797548] [2024-06-27 16:31:35,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:35,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:35,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:35,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:35,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787797548] [2024-06-27 16:31:35,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787797548] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:35,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991934130] [2024-06-27 16:31:35,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:31:35,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:35,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:35,712 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) [2024-06-27 16:31:35,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-06-27 16:31:35,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 16:31:35,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:35,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:31:35,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:35,871 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:31:35,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 16:31:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:35,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:35,965 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:31:35,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 16:31:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:35,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991934130] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:35,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:31:35,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 17 [2024-06-27 16:31:35,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260046539] [2024-06-27 16:31:35,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:35,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:31:35,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:35,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:31:35,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:31:35,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:35,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 114 transitions, 1788 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:35,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:35,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:35,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:36,317 INFO L124 PetriNetUnfolderBase]: 1297/2281 cut-off events. [2024-06-27 16:31:36,317 INFO L125 PetriNetUnfolderBase]: For 18432/18432 co-relation queries the response was YES. [2024-06-27 16:31:36,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11718 conditions, 2281 events. 1297/2281 cut-off events. For 18432/18432 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12844 event pairs, 660 based on Foata normal form. 21/2302 useless extension candidates. Maximal degree in co-relation 11646. Up to 1692 conditions per place. [2024-06-27 16:31:36,329 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 104 selfloop transitions, 39 changer transitions 0/144 dead transitions. [2024-06-27 16:31:36,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 144 transitions, 2233 flow [2024-06-27 16:31:36,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:31:36,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:31:36,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2024-06-27 16:31:36,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-27 16:31:36,330 INFO L175 Difference]: Start difference. First operand has 155 places, 114 transitions, 1788 flow. Second operand 7 states and 88 transitions. [2024-06-27 16:31:36,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 144 transitions, 2233 flow [2024-06-27 16:31:36,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 144 transitions, 2149 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 16:31:36,360 INFO L231 Difference]: Finished difference. Result has 149 places, 116 transitions, 1837 flow [2024-06-27 16:31:36,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1837, PETRI_PLACES=149, PETRI_TRANSITIONS=116} [2024-06-27 16:31:36,360 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 123 predicate places. [2024-06-27 16:31:36,360 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 116 transitions, 1837 flow [2024-06-27 16:31:36,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:36,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:36,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:36,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:36,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-06-27 16:31:36,571 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:36,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:36,572 INFO L85 PathProgramCache]: Analyzing trace with hash -54407067, now seen corresponding path program 7 times [2024-06-27 16:31:36,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:36,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980667443] [2024-06-27 16:31:36,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:36,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:36,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:36,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:36,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980667443] [2024-06-27 16:31:36,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980667443] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:36,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497015445] [2024-06-27 16:31:36,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:31:36,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:36,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:36,832 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) [2024-06-27 16:31:36,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-06-27 16:31:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:36,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 16:31:36,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:36,966 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:31:36,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2024-06-27 16:31:36,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:36,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:37,043 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:31:37,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 16:31:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:37,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497015445] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:31:37,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:31:37,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-06-27 16:31:37,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365104655] [2024-06-27 16:31:37,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:31:37,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:31:37,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:37,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:31:37,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:31:37,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:37,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 116 transitions, 1837 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:37,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:37,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:37,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:37,546 INFO L124 PetriNetUnfolderBase]: 1276/2260 cut-off events. [2024-06-27 16:31:37,546 INFO L125 PetriNetUnfolderBase]: For 16973/16973 co-relation queries the response was YES. [2024-06-27 16:31:37,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11416 conditions, 2260 events. 1276/2260 cut-off events. For 16973/16973 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12828 event pairs, 612 based on Foata normal form. 21/2280 useless extension candidates. Maximal degree in co-relation 11347. Up to 1600 conditions per place. [2024-06-27 16:31:37,558 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 120 selfloop transitions, 49 changer transitions 0/170 dead transitions. [2024-06-27 16:31:37,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 170 transitions, 2425 flow [2024-06-27 16:31:37,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:31:37,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:31:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 141 transitions. [2024-06-27 16:31:37,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3596938775510204 [2024-06-27 16:31:37,559 INFO L175 Difference]: Start difference. First operand has 149 places, 116 transitions, 1837 flow. Second operand 14 states and 141 transitions. [2024-06-27 16:31:37,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 170 transitions, 2425 flow [2024-06-27 16:31:37,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 170 transitions, 2323 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 16:31:37,588 INFO L231 Difference]: Finished difference. Result has 162 places, 123 transitions, 1953 flow [2024-06-27 16:31:37,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1748, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1953, PETRI_PLACES=162, PETRI_TRANSITIONS=123} [2024-06-27 16:31:37,589 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 136 predicate places. [2024-06-27 16:31:37,589 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 123 transitions, 1953 flow [2024-06-27 16:31:37,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:37,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:37,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:37,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:37,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-06-27 16:31:37,800 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:37,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:37,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1265101949, now seen corresponding path program 8 times [2024-06-27 16:31:37,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:37,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282328417] [2024-06-27 16:31:37,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:37,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:37,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:37,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282328417] [2024-06-27 16:31:37,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282328417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:37,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:37,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:37,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53280313] [2024-06-27 16:31:37,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:37,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:37,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:37,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:37,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:37,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:37,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 123 transitions, 1953 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:37,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:37,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:37,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:38,384 INFO L124 PetriNetUnfolderBase]: 1272/2256 cut-off events. [2024-06-27 16:31:38,384 INFO L125 PetriNetUnfolderBase]: For 15658/15658 co-relation queries the response was YES. [2024-06-27 16:31:38,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11420 conditions, 2256 events. 1272/2256 cut-off events. For 15658/15658 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12883 event pairs, 694 based on Foata normal form. 4/2260 useless extension candidates. Maximal degree in co-relation 11345. Up to 1787 conditions per place. [2024-06-27 16:31:38,396 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 96 selfloop transitions, 40 changer transitions 3/140 dead transitions. [2024-06-27 16:31:38,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 140 transitions, 2259 flow [2024-06-27 16:31:38,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:38,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 84 transitions. [2024-06-27 16:31:38,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-27 16:31:38,398 INFO L175 Difference]: Start difference. First operand has 162 places, 123 transitions, 1953 flow. Second operand 9 states and 84 transitions. [2024-06-27 16:31:38,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 140 transitions, 2259 flow [2024-06-27 16:31:38,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 140 transitions, 2194 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 16:31:38,426 INFO L231 Difference]: Finished difference. Result has 161 places, 121 transitions, 1921 flow [2024-06-27 16:31:38,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1857, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1921, PETRI_PLACES=161, PETRI_TRANSITIONS=121} [2024-06-27 16:31:38,426 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 135 predicate places. [2024-06-27 16:31:38,426 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 121 transitions, 1921 flow [2024-06-27 16:31:38,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:38,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:38,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:38,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 16:31:38,427 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:38,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:38,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1975366923, now seen corresponding path program 9 times [2024-06-27 16:31:38,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:38,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885385425] [2024-06-27 16:31:38,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:38,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:38,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:38,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885385425] [2024-06-27 16:31:38,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885385425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:38,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:38,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:38,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190544183] [2024-06-27 16:31:38,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:38,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:38,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:38,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:38,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:38,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:38,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 121 transitions, 1921 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:38,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:38,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:38,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:38,941 INFO L124 PetriNetUnfolderBase]: 1227/2156 cut-off events. [2024-06-27 16:31:38,941 INFO L125 PetriNetUnfolderBase]: For 15365/15365 co-relation queries the response was YES. [2024-06-27 16:31:38,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11149 conditions, 2156 events. 1227/2156 cut-off events. For 15365/15365 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12024 event pairs, 655 based on Foata normal form. 4/2160 useless extension candidates. Maximal degree in co-relation 11075. Up to 1696 conditions per place. [2024-06-27 16:31:38,953 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 98 selfloop transitions, 37 changer transitions 3/139 dead transitions. [2024-06-27 16:31:38,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 139 transitions, 2229 flow [2024-06-27 16:31:38,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:38,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:38,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-06-27 16:31:38,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3412698412698413 [2024-06-27 16:31:38,954 INFO L175 Difference]: Start difference. First operand has 161 places, 121 transitions, 1921 flow. Second operand 9 states and 86 transitions. [2024-06-27 16:31:38,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 139 transitions, 2229 flow [2024-06-27 16:31:38,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 139 transitions, 2134 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 16:31:38,980 INFO L231 Difference]: Finished difference. Result has 160 places, 119 transitions, 1852 flow [2024-06-27 16:31:38,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1797, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1852, PETRI_PLACES=160, PETRI_TRANSITIONS=119} [2024-06-27 16:31:38,981 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 134 predicate places. [2024-06-27 16:31:38,981 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 119 transitions, 1852 flow [2024-06-27 16:31:38,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:38,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:38,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:38,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 16:31:38,981 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:38,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:38,982 INFO L85 PathProgramCache]: Analyzing trace with hash -872369295, now seen corresponding path program 10 times [2024-06-27 16:31:38,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:38,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717022698] [2024-06-27 16:31:38,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:38,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:39,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:39,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717022698] [2024-06-27 16:31:39,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717022698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:39,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:39,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:39,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155620730] [2024-06-27 16:31:39,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:39,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:39,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:39,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:39,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:39,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:39,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 119 transitions, 1852 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:39,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:39,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:39,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:39,419 INFO L124 PetriNetUnfolderBase]: 1182/2056 cut-off events. [2024-06-27 16:31:39,419 INFO L125 PetriNetUnfolderBase]: For 15058/15058 co-relation queries the response was YES. [2024-06-27 16:31:39,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10779 conditions, 2056 events. 1182/2056 cut-off events. For 15058/15058 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11169 event pairs, 618 based on Foata normal form. 4/2060 useless extension candidates. Maximal degree in co-relation 10705. Up to 1605 conditions per place. [2024-06-27 16:31:39,430 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 94 selfloop transitions, 35 changer transitions 6/136 dead transitions. [2024-06-27 16:31:39,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 136 transitions, 2151 flow [2024-06-27 16:31:39,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:39,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:39,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 82 transitions. [2024-06-27 16:31:39,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3253968253968254 [2024-06-27 16:31:39,431 INFO L175 Difference]: Start difference. First operand has 160 places, 119 transitions, 1852 flow. Second operand 9 states and 82 transitions. [2024-06-27 16:31:39,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 136 transitions, 2151 flow [2024-06-27 16:31:39,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 136 transitions, 2079 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 16:31:39,457 INFO L231 Difference]: Finished difference. Result has 159 places, 116 transitions, 1785 flow [2024-06-27 16:31:39,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1750, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1785, PETRI_PLACES=159, PETRI_TRANSITIONS=116} [2024-06-27 16:31:39,458 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 133 predicate places. [2024-06-27 16:31:39,458 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 116 transitions, 1785 flow [2024-06-27 16:31:39,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:39,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:39,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:39,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 16:31:39,458 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:39,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:39,458 INFO L85 PathProgramCache]: Analyzing trace with hash -497280661, now seen corresponding path program 11 times [2024-06-27 16:31:39,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:39,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715067896] [2024-06-27 16:31:39,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:39,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:39,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:39,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715067896] [2024-06-27 16:31:39,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715067896] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:39,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036035694] [2024-06-27 16:31:39,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:31:39,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:39,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:39,614 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) [2024-06-27 16:31:39,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-06-27 16:31:39,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:31:39,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:39,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-27 16:31:39,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:39,757 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-06-27 16:31:39,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-06-27 16:31:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:39,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:39,834 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-27 16:31:39,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-06-27 16:31:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:39,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036035694] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:31:39,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:31:39,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 20 [2024-06-27 16:31:39,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081769463] [2024-06-27 16:31:39,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:31:39,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 16:31:39,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:39,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 16:31:39,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2024-06-27 16:31:39,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:39,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 116 transitions, 1785 flow. Second operand has 20 states, 20 states have (on average 5.6) internal successors, (112), 20 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:39,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:39,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:39,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:40,331 INFO L124 PetriNetUnfolderBase]: 1212/2102 cut-off events. [2024-06-27 16:31:40,331 INFO L125 PetriNetUnfolderBase]: For 15385/15385 co-relation queries the response was YES. [2024-06-27 16:31:40,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11107 conditions, 2102 events. 1212/2102 cut-off events. For 15385/15385 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11648 event pairs, 91 based on Foata normal form. 12/2114 useless extension candidates. Maximal degree in co-relation 11033. Up to 1203 conditions per place. [2024-06-27 16:31:40,340 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 113 selfloop transitions, 50 changer transitions 1/165 dead transitions. [2024-06-27 16:31:40,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 165 transitions, 2491 flow [2024-06-27 16:31:40,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:31:40,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:31:40,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 100 transitions. [2024-06-27 16:31:40,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-27 16:31:40,343 INFO L175 Difference]: Start difference. First operand has 159 places, 116 transitions, 1785 flow. Second operand 10 states and 100 transitions. [2024-06-27 16:31:40,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 165 transitions, 2491 flow [2024-06-27 16:31:40,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 165 transitions, 2408 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 16:31:40,370 INFO L231 Difference]: Finished difference. Result has 158 places, 118 transitions, 1858 flow [2024-06-27 16:31:40,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1858, PETRI_PLACES=158, PETRI_TRANSITIONS=118} [2024-06-27 16:31:40,377 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 132 predicate places. [2024-06-27 16:31:40,378 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 118 transitions, 1858 flow [2024-06-27 16:31:40,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.6) internal successors, (112), 20 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:40,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:40,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:40,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:40,588 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,SelfDestructingSolverStorable43 [2024-06-27 16:31:40,588 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:40,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:40,589 INFO L85 PathProgramCache]: Analyzing trace with hash 188378157, now seen corresponding path program 11 times [2024-06-27 16:31:40,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:40,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490584869] [2024-06-27 16:31:40,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:40,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:40,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:40,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490584869] [2024-06-27 16:31:40,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490584869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:40,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:40,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:40,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660205720] [2024-06-27 16:31:40,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:40,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:40,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:40,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:40,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:40,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:40,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 118 transitions, 1858 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:40,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:40,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:40,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:41,099 INFO L124 PetriNetUnfolderBase]: 1242/2153 cut-off events. [2024-06-27 16:31:41,099 INFO L125 PetriNetUnfolderBase]: For 18247/18247 co-relation queries the response was YES. [2024-06-27 16:31:41,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11789 conditions, 2153 events. 1242/2153 cut-off events. For 18247/18247 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11712 event pairs, 510 based on Foata normal form. 21/2174 useless extension candidates. Maximal degree in co-relation 11714. Up to 1388 conditions per place. [2024-06-27 16:31:41,111 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 111 selfloop transitions, 47 changer transitions 0/159 dead transitions. [2024-06-27 16:31:41,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 159 transitions, 2480 flow [2024-06-27 16:31:41,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:41,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:41,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-27 16:31:41,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 16:31:41,112 INFO L175 Difference]: Start difference. First operand has 158 places, 118 transitions, 1858 flow. Second operand 9 states and 100 transitions. [2024-06-27 16:31:41,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 159 transitions, 2480 flow [2024-06-27 16:31:41,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 159 transitions, 2348 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 16:31:41,141 INFO L231 Difference]: Finished difference. Result has 161 places, 121 transitions, 1911 flow [2024-06-27 16:31:41,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1740, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1911, PETRI_PLACES=161, PETRI_TRANSITIONS=121} [2024-06-27 16:31:41,142 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 135 predicate places. [2024-06-27 16:31:41,142 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 121 transitions, 1911 flow [2024-06-27 16:31:41,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:41,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:41,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:41,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 16:31:41,143 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:41,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:41,143 INFO L85 PathProgramCache]: Analyzing trace with hash 303513221, now seen corresponding path program 12 times [2024-06-27 16:31:41,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:41,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755782969] [2024-06-27 16:31:41,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:41,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:41,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:41,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755782969] [2024-06-27 16:31:41,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755782969] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:41,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863317549] [2024-06-27 16:31:41,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:31:41,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:41,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:41,308 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) [2024-06-27 16:31:41,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-06-27 16:31:41,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 16:31:41,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:41,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:31:41,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:41,452 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:31:41,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-06-27 16:31:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:41,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:41,534 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-27 16:31:41,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-06-27 16:31:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:41,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863317549] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:31:41,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:31:41,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-06-27 16:31:41,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571552814] [2024-06-27 16:31:41,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:31:41,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:31:41,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:41,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:31:41,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:31:41,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:41,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 121 transitions, 1911 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:41,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:41,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:41,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:42,075 INFO L124 PetriNetUnfolderBase]: 1764/3067 cut-off events. [2024-06-27 16:31:42,076 INFO L125 PetriNetUnfolderBase]: For 21832/21832 co-relation queries the response was YES. [2024-06-27 16:31:42,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15511 conditions, 3067 events. 1764/3067 cut-off events. For 21832/21832 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 18018 event pairs, 541 based on Foata normal form. 12/3079 useless extension candidates. Maximal degree in co-relation 15436. Up to 1289 conditions per place. [2024-06-27 16:31:42,093 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 145 selfloop transitions, 60 changer transitions 0/206 dead transitions. [2024-06-27 16:31:42,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 206 transitions, 3074 flow [2024-06-27 16:31:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:31:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:31:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 133 transitions. [2024-06-27 16:31:42,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 16:31:42,094 INFO L175 Difference]: Start difference. First operand has 161 places, 121 transitions, 1911 flow. Second operand 12 states and 133 transitions. [2024-06-27 16:31:42,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 206 transitions, 3074 flow [2024-06-27 16:31:42,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 206 transitions, 2946 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 16:31:42,142 INFO L231 Difference]: Finished difference. Result has 170 places, 130 transitions, 2114 flow [2024-06-27 16:31:42,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1791, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2114, PETRI_PLACES=170, PETRI_TRANSITIONS=130} [2024-06-27 16:31:42,142 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 144 predicate places. [2024-06-27 16:31:42,142 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 130 transitions, 2114 flow [2024-06-27 16:31:42,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:42,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:42,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:42,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-06-27 16:31:42,353 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,SelfDestructingSolverStorable45 [2024-06-27 16:31:42,353 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:42,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:42,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1092287649, now seen corresponding path program 12 times [2024-06-27 16:31:42,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:42,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200399709] [2024-06-27 16:31:42,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:42,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:42,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:42,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200399709] [2024-06-27 16:31:42,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200399709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:42,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:42,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:42,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163120747] [2024-06-27 16:31:42,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:42,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:42,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:42,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:42,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:42,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:42,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 130 transitions, 2114 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:42,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:42,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:42,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:42,989 INFO L124 PetriNetUnfolderBase]: 1760/3063 cut-off events. [2024-06-27 16:31:42,989 INFO L125 PetriNetUnfolderBase]: For 24401/24401 co-relation queries the response was YES. [2024-06-27 16:31:42,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15895 conditions, 3063 events. 1760/3063 cut-off events. For 24401/24401 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 18009 event pairs, 880 based on Foata normal form. 4/3067 useless extension candidates. Maximal degree in co-relation 15815. Up to 2291 conditions per place. [2024-06-27 16:31:43,005 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 106 selfloop transitions, 52 changer transitions 3/162 dead transitions. [2024-06-27 16:31:43,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 162 transitions, 2627 flow [2024-06-27 16:31:43,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:43,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:43,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 87 transitions. [2024-06-27 16:31:43,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-06-27 16:31:43,006 INFO L175 Difference]: Start difference. First operand has 170 places, 130 transitions, 2114 flow. Second operand 9 states and 87 transitions. [2024-06-27 16:31:43,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 162 transitions, 2627 flow [2024-06-27 16:31:43,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 162 transitions, 2568 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 16:31:43,057 INFO L231 Difference]: Finished difference. Result has 175 places, 131 transitions, 2173 flow [2024-06-27 16:31:43,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2173, PETRI_PLACES=175, PETRI_TRANSITIONS=131} [2024-06-27 16:31:43,058 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 149 predicate places. [2024-06-27 16:31:43,058 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 131 transitions, 2173 flow [2024-06-27 16:31:43,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:43,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:43,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:43,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 16:31:43,059 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:43,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:43,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1034053993, now seen corresponding path program 13 times [2024-06-27 16:31:43,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:43,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093559318] [2024-06-27 16:31:43,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:43,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:43,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:43,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093559318] [2024-06-27 16:31:43,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093559318] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:43,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598101894] [2024-06-27 16:31:43,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:31:43,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:43,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:43,219 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) [2024-06-27 16:31:43,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-06-27 16:31:43,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:43,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 16:31:43,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:43,354 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-06-27 16:31:43,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-06-27 16:31:43,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:43,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:43,430 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:31:43,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 16:31:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:43,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598101894] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:31:43,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:31:43,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-06-27 16:31:43,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433965940] [2024-06-27 16:31:43,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:31:43,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:31:43,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:43,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:31:43,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:31:43,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:43,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 131 transitions, 2173 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:43,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:43,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:43,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:43,893 INFO L124 PetriNetUnfolderBase]: 1785/3102 cut-off events. [2024-06-27 16:31:43,893 INFO L125 PetriNetUnfolderBase]: For 25609/25609 co-relation queries the response was YES. [2024-06-27 16:31:43,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16400 conditions, 3102 events. 1785/3102 cut-off events. For 25609/25609 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18281 event pairs, 825 based on Foata normal form. 18/3120 useless extension candidates. Maximal degree in co-relation 16319. Up to 2114 conditions per place. [2024-06-27 16:31:43,913 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 127 selfloop transitions, 48 changer transitions 0/176 dead transitions. [2024-06-27 16:31:43,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 176 transitions, 2876 flow [2024-06-27 16:31:43,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:31:43,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:31:43,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-27 16:31:43,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-27 16:31:43,915 INFO L175 Difference]: Start difference. First operand has 175 places, 131 transitions, 2173 flow. Second operand 10 states and 108 transitions. [2024-06-27 16:31:43,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 176 transitions, 2876 flow [2024-06-27 16:31:44,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 176 transitions, 2768 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 16:31:44,016 INFO L231 Difference]: Finished difference. Result has 178 places, 134 transitions, 2257 flow [2024-06-27 16:31:44,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2257, PETRI_PLACES=178, PETRI_TRANSITIONS=134} [2024-06-27 16:31:44,016 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 152 predicate places. [2024-06-27 16:31:44,016 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 134 transitions, 2257 flow [2024-06-27 16:31:44,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:44,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:44,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:44,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:44,227 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,SelfDestructingSolverStorable47 [2024-06-27 16:31:44,227 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:44,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:44,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1910976947, now seen corresponding path program 14 times [2024-06-27 16:31:44,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:44,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56027990] [2024-06-27 16:31:44,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:44,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:44,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:44,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:44,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56027990] [2024-06-27 16:31:44,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56027990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:44,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:44,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:44,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996368751] [2024-06-27 16:31:44,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:44,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:44,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:44,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:44,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:44,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:44,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 134 transitions, 2257 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:44,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:44,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:44,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:44,921 INFO L124 PetriNetUnfolderBase]: 1780/3097 cut-off events. [2024-06-27 16:31:44,921 INFO L125 PetriNetUnfolderBase]: For 26161/26161 co-relation queries the response was YES. [2024-06-27 16:31:44,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16388 conditions, 3097 events. 1780/3097 cut-off events. For 26161/26161 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18314 event pairs, 875 based on Foata normal form. 5/3102 useless extension candidates. Maximal degree in co-relation 16304. Up to 2331 conditions per place. [2024-06-27 16:31:44,939 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 107 selfloop transitions, 50 changer transitions 4/162 dead transitions. [2024-06-27 16:31:44,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 162 transitions, 2737 flow [2024-06-27 16:31:44,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:44,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:44,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 85 transitions. [2024-06-27 16:31:44,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3373015873015873 [2024-06-27 16:31:44,940 INFO L175 Difference]: Start difference. First operand has 178 places, 134 transitions, 2257 flow. Second operand 9 states and 85 transitions. [2024-06-27 16:31:44,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 162 transitions, 2737 flow [2024-06-27 16:31:44,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 162 transitions, 2657 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 16:31:44,999 INFO L231 Difference]: Finished difference. Result has 181 places, 132 transitions, 2236 flow [2024-06-27 16:31:45,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2157, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2236, PETRI_PLACES=181, PETRI_TRANSITIONS=132} [2024-06-27 16:31:45,000 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 155 predicate places. [2024-06-27 16:31:45,001 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 132 transitions, 2236 flow [2024-06-27 16:31:45,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:45,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:45,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:45,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 16:31:45,001 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:45,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:45,002 INFO L85 PathProgramCache]: Analyzing trace with hash 222114165, now seen corresponding path program 15 times [2024-06-27 16:31:45,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:45,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976916022] [2024-06-27 16:31:45,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:45,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:45,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:45,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976916022] [2024-06-27 16:31:45,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976916022] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:45,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755059890] [2024-06-27 16:31:45,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:31:45,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:45,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:45,203 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) [2024-06-27 16:31:45,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-06-27 16:31:45,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:31:45,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:45,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:31:45,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:45,343 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:31:45,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 16:31:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:45,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:45,434 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-27 16:31:45,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-06-27 16:31:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:45,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755059890] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:31:45,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:31:45,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-06-27 16:31:45,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644553457] [2024-06-27 16:31:45,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:31:45,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:31:45,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:45,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:31:45,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:31:45,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:45,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 132 transitions, 2236 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:45,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:45,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:45,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:46,095 INFO L124 PetriNetUnfolderBase]: 1853/3215 cut-off events. [2024-06-27 16:31:46,095 INFO L125 PetriNetUnfolderBase]: For 25478/25478 co-relation queries the response was YES. [2024-06-27 16:31:46,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16799 conditions, 3215 events. 1853/3215 cut-off events. For 25478/25478 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19048 event pairs, 662 based on Foata normal form. 18/3233 useless extension candidates. Maximal degree in co-relation 16716. Up to 1692 conditions per place. [2024-06-27 16:31:46,115 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 141 selfloop transitions, 64 changer transitions 0/206 dead transitions. [2024-06-27 16:31:46,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 206 transitions, 3261 flow [2024-06-27 16:31:46,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:31:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:31:46,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 133 transitions. [2024-06-27 16:31:46,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3392857142857143 [2024-06-27 16:31:46,116 INFO L175 Difference]: Start difference. First operand has 181 places, 132 transitions, 2236 flow. Second operand 14 states and 133 transitions. [2024-06-27 16:31:46,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 206 transitions, 3261 flow [2024-06-27 16:31:46,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 206 transitions, 3113 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 16:31:46,178 INFO L231 Difference]: Finished difference. Result has 191 places, 142 transitions, 2398 flow [2024-06-27 16:31:46,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2094, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2398, PETRI_PLACES=191, PETRI_TRANSITIONS=142} [2024-06-27 16:31:46,179 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 165 predicate places. [2024-06-27 16:31:46,179 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 142 transitions, 2398 flow [2024-06-27 16:31:46,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:46,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:46,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:46,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:46,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:46,390 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:46,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:46,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1016050527, now seen corresponding path program 13 times [2024-06-27 16:31:46,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:46,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268664673] [2024-06-27 16:31:46,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:46,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:46,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:46,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:46,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268664673] [2024-06-27 16:31:46,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268664673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:46,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:46,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:46,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057427747] [2024-06-27 16:31:46,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:46,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:46,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:46,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:46,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:46,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:46,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 142 transitions, 2398 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:46,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:46,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:46,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:47,001 INFO L124 PetriNetUnfolderBase]: 1849/3211 cut-off events. [2024-06-27 16:31:47,001 INFO L125 PetriNetUnfolderBase]: For 24720/24720 co-relation queries the response was YES. [2024-06-27 16:31:47,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17015 conditions, 3211 events. 1849/3211 cut-off events. For 24720/24720 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 19046 event pairs, 917 based on Foata normal form. 4/3215 useless extension candidates. Maximal degree in co-relation 16926. Up to 2457 conditions per place. [2024-06-27 16:31:47,022 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 124 selfloop transitions, 47 changer transitions 6/178 dead transitions. [2024-06-27 16:31:47,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 178 transitions, 2959 flow [2024-06-27 16:31:47,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:47,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:47,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 87 transitions. [2024-06-27 16:31:47,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-06-27 16:31:47,023 INFO L175 Difference]: Start difference. First operand has 191 places, 142 transitions, 2398 flow. Second operand 9 states and 87 transitions. [2024-06-27 16:31:47,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 178 transitions, 2959 flow [2024-06-27 16:31:47,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 178 transitions, 2875 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 16:31:47,096 INFO L231 Difference]: Finished difference. Result has 193 places, 140 transitions, 2356 flow [2024-06-27 16:31:47,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2283, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2356, PETRI_PLACES=193, PETRI_TRANSITIONS=140} [2024-06-27 16:31:47,097 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 167 predicate places. [2024-06-27 16:31:47,097 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 140 transitions, 2356 flow [2024-06-27 16:31:47,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:47,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:47,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:47,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 16:31:47,098 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:47,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:47,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1691282855, now seen corresponding path program 16 times [2024-06-27 16:31:47,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:47,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727514326] [2024-06-27 16:31:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:47,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:47,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:47,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727514326] [2024-06-27 16:31:47,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727514326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:47,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:47,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:47,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760300766] [2024-06-27 16:31:47,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:47,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:47,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:47,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:47,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:47,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:47,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 140 transitions, 2356 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:47,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:47,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:47,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:47,740 INFO L124 PetriNetUnfolderBase]: 1841/3200 cut-off events. [2024-06-27 16:31:47,740 INFO L125 PetriNetUnfolderBase]: For 26274/26274 co-relation queries the response was YES. [2024-06-27 16:31:47,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17111 conditions, 3200 events. 1841/3200 cut-off events. For 26274/26274 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18939 event pairs, 964 based on Foata normal form. 5/3205 useless extension candidates. Maximal degree in co-relation 17022. Up to 2457 conditions per place. [2024-06-27 16:31:47,761 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 117 selfloop transitions, 43 changer transitions 4/165 dead transitions. [2024-06-27 16:31:47,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 165 transitions, 2811 flow [2024-06-27 16:31:47,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:47,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 87 transitions. [2024-06-27 16:31:47,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-06-27 16:31:47,762 INFO L175 Difference]: Start difference. First operand has 193 places, 140 transitions, 2356 flow. Second operand 9 states and 87 transitions. [2024-06-27 16:31:47,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 165 transitions, 2811 flow [2024-06-27 16:31:47,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 165 transitions, 2668 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 16:31:47,822 INFO L231 Difference]: Finished difference. Result has 191 places, 140 transitions, 2309 flow [2024-06-27 16:31:47,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2309, PETRI_PLACES=191, PETRI_TRANSITIONS=140} [2024-06-27 16:31:47,823 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 165 predicate places. [2024-06-27 16:31:47,823 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 140 transitions, 2309 flow [2024-06-27 16:31:47,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:47,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:47,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:47,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 16:31:47,823 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:47,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:47,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1216445901, now seen corresponding path program 17 times [2024-06-27 16:31:47,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:47,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012474364] [2024-06-27 16:31:47,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:47,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:47,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:47,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012474364] [2024-06-27 16:31:47,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012474364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:47,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:47,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:47,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527440548] [2024-06-27 16:31:47,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:47,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:47,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:47,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:47,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:47,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:47,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 140 transitions, 2309 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:47,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:47,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:47,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:48,489 INFO L124 PetriNetUnfolderBase]: 1843/3204 cut-off events. [2024-06-27 16:31:48,489 INFO L125 PetriNetUnfolderBase]: For 24837/24837 co-relation queries the response was YES. [2024-06-27 16:31:48,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17003 conditions, 3204 events. 1843/3204 cut-off events. For 24837/24837 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18980 event pairs, 966 based on Foata normal form. 5/3209 useless extension candidates. Maximal degree in co-relation 16915. Up to 2459 conditions per place. [2024-06-27 16:31:48,506 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 116 selfloop transitions, 45 changer transitions 7/169 dead transitions. [2024-06-27 16:31:48,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 169 transitions, 2861 flow [2024-06-27 16:31:48,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:48,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2024-06-27 16:31:48,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-27 16:31:48,507 INFO L175 Difference]: Start difference. First operand has 191 places, 140 transitions, 2309 flow. Second operand 9 states and 92 transitions. [2024-06-27 16:31:48,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 169 transitions, 2861 flow [2024-06-27 16:31:48,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 169 transitions, 2762 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 16:31:48,562 INFO L231 Difference]: Finished difference. Result has 192 places, 144 transitions, 2403 flow [2024-06-27 16:31:48,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2220, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2403, PETRI_PLACES=192, PETRI_TRANSITIONS=144} [2024-06-27 16:31:48,562 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 166 predicate places. [2024-06-27 16:31:48,563 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 144 transitions, 2403 flow [2024-06-27 16:31:48,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:48,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:48,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:48,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 16:31:48,563 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:48,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:48,563 INFO L85 PathProgramCache]: Analyzing trace with hash 213244371, now seen corresponding path program 18 times [2024-06-27 16:31:48,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:48,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296227923] [2024-06-27 16:31:48,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:48,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:48,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:48,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296227923] [2024-06-27 16:31:48,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296227923] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:48,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054792151] [2024-06-27 16:31:48,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:31:48,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:48,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:48,724 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) [2024-06-27 16:31:48,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-06-27 16:31:48,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 16:31:48,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:48,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:31:48,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:48,853 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:31:48,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 16:31:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:48,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:48,929 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:31:48,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 16:31:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:48,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054792151] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:48,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:31:48,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 17 [2024-06-27 16:31:48,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849657319] [2024-06-27 16:31:48,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:48,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:31:48,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:48,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:31:48,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:31:48,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:48,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 144 transitions, 2403 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:48,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:48,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:48,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:49,400 INFO L124 PetriNetUnfolderBase]: 1913/3341 cut-off events. [2024-06-27 16:31:49,400 INFO L125 PetriNetUnfolderBase]: For 27059/27059 co-relation queries the response was YES. [2024-06-27 16:31:49,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17715 conditions, 3341 events. 1913/3341 cut-off events. For 27059/27059 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 20148 event pairs, 962 based on Foata normal form. 18/3359 useless extension candidates. Maximal degree in co-relation 17625. Up to 2477 conditions per place. [2024-06-27 16:31:49,424 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 131 selfloop transitions, 46 changer transitions 3/181 dead transitions. [2024-06-27 16:31:49,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 181 transitions, 3003 flow [2024-06-27 16:31:49,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:31:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:31:49,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2024-06-27 16:31:49,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744897959183674 [2024-06-27 16:31:49,425 INFO L175 Difference]: Start difference. First operand has 192 places, 144 transitions, 2403 flow. Second operand 7 states and 93 transitions. [2024-06-27 16:31:49,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 181 transitions, 3003 flow [2024-06-27 16:31:49,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 181 transitions, 2896 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 16:31:49,492 INFO L231 Difference]: Finished difference. Result has 193 places, 147 transitions, 2483 flow [2024-06-27 16:31:49,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2302, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2483, PETRI_PLACES=193, PETRI_TRANSITIONS=147} [2024-06-27 16:31:49,493 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 167 predicate places. [2024-06-27 16:31:49,493 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 147 transitions, 2483 flow [2024-06-27 16:31:49,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:49,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:49,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:49,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:49,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:49,710 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:49,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:49,710 INFO L85 PathProgramCache]: Analyzing trace with hash -63705097, now seen corresponding path program 19 times [2024-06-27 16:31:49,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:49,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212570052] [2024-06-27 16:31:49,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:49,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:49,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:49,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212570052] [2024-06-27 16:31:49,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212570052] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:49,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205246627] [2024-06-27 16:31:49,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:31:49,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:49,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:49,884 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) [2024-06-27 16:31:49,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-06-27 16:31:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:49,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 16:31:49,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:50,026 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:31:50,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2024-06-27 16:31:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:50,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:50,112 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:31:50,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 16:31:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:50,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205246627] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:31:50,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:31:50,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-06-27 16:31:50,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169005894] [2024-06-27 16:31:50,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:31:50,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:31:50,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:50,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:31:50,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:31:50,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:50,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 147 transitions, 2483 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:50,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:50,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:50,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:50,743 INFO L124 PetriNetUnfolderBase]: 1850/3224 cut-off events. [2024-06-27 16:31:50,744 INFO L125 PetriNetUnfolderBase]: For 26527/26527 co-relation queries the response was YES. [2024-06-27 16:31:50,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17248 conditions, 3224 events. 1850/3224 cut-off events. For 26527/26527 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19167 event pairs, 925 based on Foata normal form. 18/3241 useless extension candidates. Maximal degree in co-relation 17156. Up to 2394 conditions per place. [2024-06-27 16:31:50,766 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 132 selfloop transitions, 56 changer transitions 4/193 dead transitions. [2024-06-27 16:31:50,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 193 transitions, 3142 flow [2024-06-27 16:31:50,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:31:50,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:31:50,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 129 transitions. [2024-06-27 16:31:50,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3543956043956044 [2024-06-27 16:31:50,768 INFO L175 Difference]: Start difference. First operand has 193 places, 147 transitions, 2483 flow. Second operand 13 states and 129 transitions. [2024-06-27 16:31:50,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 193 transitions, 3142 flow [2024-06-27 16:31:50,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 193 transitions, 3036 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 16:31:50,833 INFO L231 Difference]: Finished difference. Result has 203 places, 152 transitions, 2568 flow [2024-06-27 16:31:50,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2368, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2568, PETRI_PLACES=203, PETRI_TRANSITIONS=152} [2024-06-27 16:31:50,834 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 177 predicate places. [2024-06-27 16:31:50,834 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 152 transitions, 2568 flow [2024-06-27 16:31:50,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:50,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:50,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:50,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-06-27 16:31:51,044 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,SelfDestructingSolverStorable54 [2024-06-27 16:31:51,045 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:51,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:51,045 INFO L85 PathProgramCache]: Analyzing trace with hash 158368447, now seen corresponding path program 14 times [2024-06-27 16:31:51,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:51,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740762063] [2024-06-27 16:31:51,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:51,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:51,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:51,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740762063] [2024-06-27 16:31:51,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740762063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:51,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:51,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:51,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286478159] [2024-06-27 16:31:51,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:51,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:51,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:51,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:51,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:51,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:51,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 152 transitions, 2568 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:51,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:51,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:51,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:51,792 INFO L124 PetriNetUnfolderBase]: 1840/3205 cut-off events. [2024-06-27 16:31:51,792 INFO L125 PetriNetUnfolderBase]: For 23246/23246 co-relation queries the response was YES. [2024-06-27 16:31:51,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17098 conditions, 3205 events. 1840/3205 cut-off events. For 23246/23246 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19090 event pairs, 922 based on Foata normal form. 4/3209 useless extension candidates. Maximal degree in co-relation 17003. Up to 2471 conditions per place. [2024-06-27 16:31:51,811 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 120 selfloop transitions, 52 changer transitions 7/180 dead transitions. [2024-06-27 16:31:51,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 180 transitions, 3073 flow [2024-06-27 16:31:51,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:51,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:51,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 84 transitions. [2024-06-27 16:31:51,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-27 16:31:51,813 INFO L175 Difference]: Start difference. First operand has 203 places, 152 transitions, 2568 flow. Second operand 9 states and 84 transitions. [2024-06-27 16:31:51,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 180 transitions, 3073 flow [2024-06-27 16:31:51,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 180 transitions, 2956 flow, removed 5 selfloop flow, removed 18 redundant places. [2024-06-27 16:31:51,872 INFO L231 Difference]: Finished difference. Result has 194 places, 150 transitions, 2513 flow [2024-06-27 16:31:51,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2422, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2513, PETRI_PLACES=194, PETRI_TRANSITIONS=150} [2024-06-27 16:31:51,873 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 168 predicate places. [2024-06-27 16:31:51,873 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 150 transitions, 2513 flow [2024-06-27 16:31:51,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:51,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:51,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:51,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 16:31:51,874 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:51,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:51,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1921818819, now seen corresponding path program 15 times [2024-06-27 16:31:51,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:51,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106062183] [2024-06-27 16:31:51,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:51,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:52,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:52,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106062183] [2024-06-27 16:31:52,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106062183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:52,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:52,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:52,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151740848] [2024-06-27 16:31:52,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:52,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:52,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:52,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:52,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:52,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:52,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 150 transitions, 2513 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:52,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:52,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:52,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:52,541 INFO L124 PetriNetUnfolderBase]: 1864/3242 cut-off events. [2024-06-27 16:31:52,541 INFO L125 PetriNetUnfolderBase]: For 24971/24971 co-relation queries the response was YES. [2024-06-27 16:31:52,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17571 conditions, 3242 events. 1864/3242 cut-off events. For 24971/24971 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19317 event pairs, 914 based on Foata normal form. 21/3263 useless extension candidates. Maximal degree in co-relation 17487. Up to 2492 conditions per place. [2024-06-27 16:31:52,562 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 128 selfloop transitions, 54 changer transitions 1/184 dead transitions. [2024-06-27 16:31:52,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 184 transitions, 3106 flow [2024-06-27 16:31:52,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:52,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:52,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2024-06-27 16:31:52,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3492063492063492 [2024-06-27 16:31:52,563 INFO L175 Difference]: Start difference. First operand has 194 places, 150 transitions, 2513 flow. Second operand 9 states and 88 transitions. [2024-06-27 16:31:52,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 184 transitions, 3106 flow [2024-06-27 16:31:52,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 184 transitions, 2978 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 16:31:52,624 INFO L231 Difference]: Finished difference. Result has 190 places, 151 transitions, 2518 flow [2024-06-27 16:31:52,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2387, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2518, PETRI_PLACES=190, PETRI_TRANSITIONS=151} [2024-06-27 16:31:52,624 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 164 predicate places. [2024-06-27 16:31:52,624 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 151 transitions, 2518 flow [2024-06-27 16:31:52,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:52,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:52,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:52,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 16:31:52,625 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:52,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:52,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1919846741, now seen corresponding path program 20 times [2024-06-27 16:31:52,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:52,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51265888] [2024-06-27 16:31:52,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:52,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:52,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:52,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51265888] [2024-06-27 16:31:52,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51265888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:52,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:52,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:52,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18825335] [2024-06-27 16:31:52,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:52,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:52,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:52,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:52,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:52,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:52,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 151 transitions, 2518 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:52,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:52,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:52,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:53,235 INFO L124 PetriNetUnfolderBase]: 1814/3138 cut-off events. [2024-06-27 16:31:53,236 INFO L125 PetriNetUnfolderBase]: For 23923/23923 co-relation queries the response was YES. [2024-06-27 16:31:53,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17160 conditions, 3138 events. 1814/3138 cut-off events. For 23923/23923 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 18402 event pairs, 912 based on Foata normal form. 5/3143 useless extension candidates. Maximal degree in co-relation 17077. Up to 2391 conditions per place. [2024-06-27 16:31:53,255 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 119 selfloop transitions, 46 changer transitions 7/173 dead transitions. [2024-06-27 16:31:53,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 173 transitions, 2940 flow [2024-06-27 16:31:53,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:53,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:53,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 89 transitions. [2024-06-27 16:31:53,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3531746031746032 [2024-06-27 16:31:53,257 INFO L175 Difference]: Start difference. First operand has 190 places, 151 transitions, 2518 flow. Second operand 9 states and 89 transitions. [2024-06-27 16:31:53,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 173 transitions, 2940 flow [2024-06-27 16:31:53,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 173 transitions, 2828 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 16:31:53,318 INFO L231 Difference]: Finished difference. Result has 191 places, 149 transitions, 2451 flow [2024-06-27 16:31:53,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2378, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2451, PETRI_PLACES=191, PETRI_TRANSITIONS=149} [2024-06-27 16:31:53,318 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 165 predicate places. [2024-06-27 16:31:53,318 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 149 transitions, 2451 flow [2024-06-27 16:31:53,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:53,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:53,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:53,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 16:31:53,319 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:53,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:53,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1039842413, now seen corresponding path program 16 times [2024-06-27 16:31:53,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:53,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076955442] [2024-06-27 16:31:53,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:53,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:53,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:53,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076955442] [2024-06-27 16:31:53,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076955442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:53,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:53,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:53,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688743056] [2024-06-27 16:31:53,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:53,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:53,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:53,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:53,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:53,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:53,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 149 transitions, 2451 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:53,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:53,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:53,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:53,910 INFO L124 PetriNetUnfolderBase]: 1810/3128 cut-off events. [2024-06-27 16:31:53,910 INFO L125 PetriNetUnfolderBase]: For 23314/23314 co-relation queries the response was YES. [2024-06-27 16:31:53,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16944 conditions, 3128 events. 1810/3128 cut-off events. For 23314/23314 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18274 event pairs, 914 based on Foata normal form. 4/3132 useless extension candidates. Maximal degree in co-relation 16861. Up to 2391 conditions per place. [2024-06-27 16:31:53,930 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 119 selfloop transitions, 45 changer transitions 3/168 dead transitions. [2024-06-27 16:31:53,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 168 transitions, 2864 flow [2024-06-27 16:31:53,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:53,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:53,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 84 transitions. [2024-06-27 16:31:53,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-27 16:31:53,931 INFO L175 Difference]: Start difference. First operand has 191 places, 149 transitions, 2451 flow. Second operand 9 states and 84 transitions. [2024-06-27 16:31:53,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 168 transitions, 2864 flow [2024-06-27 16:31:54,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 168 transitions, 2704 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-27 16:31:54,043 INFO L231 Difference]: Finished difference. Result has 182 places, 148 transitions, 2363 flow [2024-06-27 16:31:54,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2363, PETRI_PLACES=182, PETRI_TRANSITIONS=148} [2024-06-27 16:31:54,044 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 156 predicate places. [2024-06-27 16:31:54,044 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 148 transitions, 2363 flow [2024-06-27 16:31:54,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:54,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:54,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:54,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 16:31:54,045 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:54,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:54,045 INFO L85 PathProgramCache]: Analyzing trace with hash 484113445, now seen corresponding path program 17 times [2024-06-27 16:31:54,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:54,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615343134] [2024-06-27 16:31:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:54,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:54,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:54,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615343134] [2024-06-27 16:31:54,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615343134] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:54,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138442818] [2024-06-27 16:31:54,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:31:54,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:54,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:54,208 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) [2024-06-27 16:31:54,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-06-27 16:31:54,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:31:54,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:54,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:31:54,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:54,362 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:31:54,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 16:31:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:54,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:54,445 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:31:54,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 16:31:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:54,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138442818] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:31:54,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:31:54,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-06-27 16:31:54,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065274921] [2024-06-27 16:31:54,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:31:54,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:31:54,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:54,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:31:54,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:31:54,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:54,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 148 transitions, 2363 flow. Second operand has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:54,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:54,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:54,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:55,015 INFO L124 PetriNetUnfolderBase]: 1838/3173 cut-off events. [2024-06-27 16:31:55,015 INFO L125 PetriNetUnfolderBase]: For 22968/22968 co-relation queries the response was YES. [2024-06-27 16:31:55,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17230 conditions, 3173 events. 1838/3173 cut-off events. For 22968/22968 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18583 event pairs, 896 based on Foata normal form. 21/3194 useless extension candidates. Maximal degree in co-relation 17151. Up to 2412 conditions per place. [2024-06-27 16:31:55,037 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 140 selfloop transitions, 55 changer transitions 0/196 dead transitions. [2024-06-27 16:31:55,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 196 transitions, 3062 flow [2024-06-27 16:31:55,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:31:55,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:31:55,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 126 transitions. [2024-06-27 16:31:55,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34615384615384615 [2024-06-27 16:31:55,038 INFO L175 Difference]: Start difference. First operand has 182 places, 148 transitions, 2363 flow. Second operand 13 states and 126 transitions. [2024-06-27 16:31:55,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 196 transitions, 3062 flow [2024-06-27 16:31:55,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 196 transitions, 2962 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 16:31:55,098 INFO L231 Difference]: Finished difference. Result has 189 places, 157 transitions, 2552 flow [2024-06-27 16:31:55,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2273, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2552, PETRI_PLACES=189, PETRI_TRANSITIONS=157} [2024-06-27 16:31:55,099 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 163 predicate places. [2024-06-27 16:31:55,099 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 157 transitions, 2552 flow [2024-06-27 16:31:55,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:55,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:55,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:55,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:55,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-06-27 16:31:55,310 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:55,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:55,310 INFO L85 PathProgramCache]: Analyzing trace with hash -529173733, now seen corresponding path program 18 times [2024-06-27 16:31:55,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:55,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260977201] [2024-06-27 16:31:55,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:55,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:55,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:55,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:55,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260977201] [2024-06-27 16:31:55,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260977201] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:55,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156216347] [2024-06-27 16:31:55,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:31:55,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:55,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:55,478 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) [2024-06-27 16:31:55,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-06-27 16:31:55,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 16:31:55,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:55,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:31:55,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:55,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:31:55,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 16:31:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:55,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:55,710 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:31:55,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 16:31:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:55,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156216347] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:55,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:31:55,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 17 [2024-06-27 16:31:55,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717641606] [2024-06-27 16:31:55,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:55,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:31:55,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:55,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:31:55,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:31:55,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:55,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 157 transitions, 2552 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:55,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:55,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:55,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:56,243 INFO L124 PetriNetUnfolderBase]: 1817/3152 cut-off events. [2024-06-27 16:31:56,244 INFO L125 PetriNetUnfolderBase]: For 23125/23125 co-relation queries the response was YES. [2024-06-27 16:31:56,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17134 conditions, 3152 events. 1817/3152 cut-off events. For 23125/23125 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18559 event pairs, 866 based on Foata normal form. 21/3173 useless extension candidates. Maximal degree in co-relation 17051. Up to 2419 conditions per place. [2024-06-27 16:31:56,266 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 132 selfloop transitions, 47 changer transitions 2/182 dead transitions. [2024-06-27 16:31:56,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 182 transitions, 3022 flow [2024-06-27 16:31:56,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:31:56,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:31:56,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 85 transitions. [2024-06-27 16:31:56,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336734693877551 [2024-06-27 16:31:56,267 INFO L175 Difference]: Start difference. First operand has 189 places, 157 transitions, 2552 flow. Second operand 7 states and 85 transitions. [2024-06-27 16:31:56,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 182 transitions, 3022 flow [2024-06-27 16:31:56,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 182 transitions, 2946 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 16:31:56,333 INFO L231 Difference]: Finished difference. Result has 187 places, 155 transitions, 2520 flow [2024-06-27 16:31:56,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2520, PETRI_PLACES=187, PETRI_TRANSITIONS=155} [2024-06-27 16:31:56,334 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 161 predicate places. [2024-06-27 16:31:56,334 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 155 transitions, 2520 flow [2024-06-27 16:31:56,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:56,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:56,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:56,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:56,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:56,540 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:56,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:56,540 INFO L85 PathProgramCache]: Analyzing trace with hash 494950991, now seen corresponding path program 19 times [2024-06-27 16:31:56,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:56,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762840527] [2024-06-27 16:31:56,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:56,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:56,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:56,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762840527] [2024-06-27 16:31:56,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762840527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:56,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:56,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:56,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366896710] [2024-06-27 16:31:56,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:56,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:56,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:56,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:56,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:56,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:56,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 155 transitions, 2520 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:56,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:56,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:56,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:57,177 INFO L124 PetriNetUnfolderBase]: 1811/3142 cut-off events. [2024-06-27 16:31:57,177 INFO L125 PetriNetUnfolderBase]: For 23102/23102 co-relation queries the response was YES. [2024-06-27 16:31:57,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17110 conditions, 3142 events. 1811/3142 cut-off events. For 23102/23102 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18448 event pairs, 876 based on Foata normal form. 4/3145 useless extension candidates. Maximal degree in co-relation 17031. Up to 2412 conditions per place. [2024-06-27 16:31:57,196 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 119 selfloop transitions, 48 changer transitions 3/171 dead transitions. [2024-06-27 16:31:57,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 171 transitions, 2898 flow [2024-06-27 16:31:57,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:57,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:57,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 82 transitions. [2024-06-27 16:31:57,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3253968253968254 [2024-06-27 16:31:57,197 INFO L175 Difference]: Start difference. First operand has 187 places, 155 transitions, 2520 flow. Second operand 9 states and 82 transitions. [2024-06-27 16:31:57,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 171 transitions, 2898 flow [2024-06-27 16:31:57,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 171 transitions, 2784 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-27 16:31:57,253 INFO L231 Difference]: Finished difference. Result has 182 places, 153 transitions, 2462 flow [2024-06-27 16:31:57,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2378, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2462, PETRI_PLACES=182, PETRI_TRANSITIONS=153} [2024-06-27 16:31:57,254 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 156 predicate places. [2024-06-27 16:31:57,254 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 153 transitions, 2462 flow [2024-06-27 16:31:57,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:57,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:57,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:57,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 16:31:57,255 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:57,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:57,255 INFO L85 PathProgramCache]: Analyzing trace with hash 2108517725, now seen corresponding path program 20 times [2024-06-27 16:31:57,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:57,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661265610] [2024-06-27 16:31:57,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:57,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:57,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:57,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661265610] [2024-06-27 16:31:57,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661265610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:31:57,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:31:57,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:31:57,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184002240] [2024-06-27 16:31:57,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:31:57,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:31:57,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:57,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:31:57,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:31:57,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:57,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 153 transitions, 2462 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:57,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:57,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:57,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:57,851 INFO L124 PetriNetUnfolderBase]: 1766/3042 cut-off events. [2024-06-27 16:31:57,852 INFO L125 PetriNetUnfolderBase]: For 22323/22323 co-relation queries the response was YES. [2024-06-27 16:31:57,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16630 conditions, 3042 events. 1766/3042 cut-off events. For 22323/22323 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17578 event pairs, 890 based on Foata normal form. 4/3046 useless extension candidates. Maximal degree in co-relation 16559. Up to 2412 conditions per place. [2024-06-27 16:31:57,867 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 114 selfloop transitions, 45 changer transitions 6/166 dead transitions. [2024-06-27 16:31:57,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 166 transitions, 2821 flow [2024-06-27 16:31:57,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:31:57,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:31:57,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 77 transitions. [2024-06-27 16:31:57,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3055555555555556 [2024-06-27 16:31:57,868 INFO L175 Difference]: Start difference. First operand has 182 places, 153 transitions, 2462 flow. Second operand 9 states and 77 transitions. [2024-06-27 16:31:57,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 166 transitions, 2821 flow [2024-06-27 16:31:57,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 166 transitions, 2720 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 16:31:57,916 INFO L231 Difference]: Finished difference. Result has 181 places, 150 transitions, 2396 flow [2024-06-27 16:31:57,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2333, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2396, PETRI_PLACES=181, PETRI_TRANSITIONS=150} [2024-06-27 16:31:57,917 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 155 predicate places. [2024-06-27 16:31:57,917 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 150 transitions, 2396 flow [2024-06-27 16:31:57,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:57,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:57,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:57,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 16:31:57,918 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:57,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:57,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1258216708, now seen corresponding path program 1 times [2024-06-27 16:31:57,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:57,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120603586] [2024-06-27 16:31:57,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:57,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:58,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:58,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120603586] [2024-06-27 16:31:58,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120603586] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:58,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589274724] [2024-06-27 16:31:58,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:58,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:58,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:58,029 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) [2024-06-27 16:31:58,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-06-27 16:31:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:58,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:31:58,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:58,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:58,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589274724] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:31:58,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:31:58,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-06-27 16:31:58,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370476067] [2024-06-27 16:31:58,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:31:58,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:31:58,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:58,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:31:58,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:31:58,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:31:58,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 150 transitions, 2396 flow. Second operand has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:58,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:58,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:31:58,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:59,414 INFO L124 PetriNetUnfolderBase]: 5278/9067 cut-off events. [2024-06-27 16:31:59,414 INFO L125 PetriNetUnfolderBase]: For 65751/65751 co-relation queries the response was YES. [2024-06-27 16:31:59,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49526 conditions, 9067 events. 5278/9067 cut-off events. For 65751/65751 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 63603 event pairs, 1863 based on Foata normal form. 6/9073 useless extension candidates. Maximal degree in co-relation 48239. Up to 2999 conditions per place. [2024-06-27 16:31:59,461 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 479 selfloop transitions, 23 changer transitions 1/504 dead transitions. [2024-06-27 16:31:59,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 504 transitions, 8895 flow [2024-06-27 16:31:59,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:31:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:31:59,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 148 transitions. [2024-06-27 16:31:59,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-27 16:31:59,463 INFO L175 Difference]: Start difference. First operand has 181 places, 150 transitions, 2396 flow. Second operand 14 states and 148 transitions. [2024-06-27 16:31:59,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 504 transitions, 8895 flow [2024-06-27 16:31:59,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 504 transitions, 8590 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 16:31:59,731 INFO L231 Difference]: Finished difference. Result has 184 places, 171 transitions, 2598 flow [2024-06-27 16:31:59,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2598, PETRI_PLACES=184, PETRI_TRANSITIONS=171} [2024-06-27 16:31:59,732 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 158 predicate places. [2024-06-27 16:31:59,732 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 171 transitions, 2598 flow [2024-06-27 16:31:59,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:59,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:59,732 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:59,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:59,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:59,933 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:31:59,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:59,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1100053289, now seen corresponding path program 1 times [2024-06-27 16:31:59,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:59,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396125452] [2024-06-27 16:31:59,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:59,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:59,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:59,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:59,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396125452] [2024-06-27 16:31:59,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396125452] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:59,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239930838] [2024-06-27 16:31:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:59,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:59,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:59,990 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) [2024-06-27 16:31:59,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-06-27 16:32:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:00,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:32:00,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:32:00,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:32:00,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239930838] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:00,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:00,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-06-27 16:32:00,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177924556] [2024-06-27 16:32:00,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:00,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 16:32:00,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:00,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 16:32:00,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-06-27 16:32:00,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:32:00,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 171 transitions, 2598 flow. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:00,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:00,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:32:00,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:01,438 INFO L124 PetriNetUnfolderBase]: 5006/8827 cut-off events. [2024-06-27 16:32:01,438 INFO L125 PetriNetUnfolderBase]: For 73104/73104 co-relation queries the response was YES. [2024-06-27 16:32:01,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52518 conditions, 8827 events. 5006/8827 cut-off events. For 73104/73104 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 63723 event pairs, 1572 based on Foata normal form. 324/9146 useless extension candidates. Maximal degree in co-relation 51431. Up to 3008 conditions per place. [2024-06-27 16:32:01,487 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 428 selfloop transitions, 120 changer transitions 3/552 dead transitions. [2024-06-27 16:32:01,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 552 transitions, 9578 flow [2024-06-27 16:32:01,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 16:32:01,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 16:32:01,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 194 transitions. [2024-06-27 16:32:01,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-27 16:32:01,490 INFO L175 Difference]: Start difference. First operand has 184 places, 171 transitions, 2598 flow. Second operand 18 states and 194 transitions. [2024-06-27 16:32:01,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 552 transitions, 9578 flow [2024-06-27 16:32:02,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 552 transitions, 9517 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 16:32:02,049 INFO L231 Difference]: Finished difference. Result has 201 places, 273 transitions, 5378 flow [2024-06-27 16:32:02,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2494, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5378, PETRI_PLACES=201, PETRI_TRANSITIONS=273} [2024-06-27 16:32:02,050 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 175 predicate places. [2024-06-27 16:32:02,050 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 273 transitions, 5378 flow [2024-06-27 16:32:02,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:02,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:02,051 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:02,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-06-27 16:32:02,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:02,262 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:32:02,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:02,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1099303210, now seen corresponding path program 2 times [2024-06-27 16:32:02,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:02,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296433646] [2024-06-27 16:32:02,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:02,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:32:02,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:02,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296433646] [2024-06-27 16:32:02,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296433646] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:02,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625275679] [2024-06-27 16:32:02,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:32:02,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:02,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:02,394 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) [2024-06-27 16:32:02,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-06-27 16:32:02,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-27 16:32:02,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:02,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-27 16:32:02,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:32:02,532 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:32:02,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625275679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:32:02,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:32:02,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2024-06-27 16:32:02,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917173615] [2024-06-27 16:32:02,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:32:02,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:32:02,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:02,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:32:02,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-27 16:32:02,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:32:02,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 273 transitions, 5378 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:02,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:02,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:32:02,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:03,581 INFO L124 PetriNetUnfolderBase]: 5006/8797 cut-off events. [2024-06-27 16:32:03,581 INFO L125 PetriNetUnfolderBase]: For 87053/87053 co-relation queries the response was YES. [2024-06-27 16:32:03,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53764 conditions, 8797 events. 5006/8797 cut-off events. For 87053/87053 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 63795 event pairs, 806 based on Foata normal form. 15/8811 useless extension candidates. Maximal degree in co-relation 52668. Up to 3553 conditions per place. [2024-06-27 16:32:03,633 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 319 selfloop transitions, 40 changer transitions 1/361 dead transitions. [2024-06-27 16:32:03,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 361 transitions, 7524 flow [2024-06-27 16:32:03,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:32:03,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:32:03,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2024-06-27 16:32:03,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-06-27 16:32:03,635 INFO L175 Difference]: Start difference. First operand has 201 places, 273 transitions, 5378 flow. Second operand 5 states and 71 transitions. [2024-06-27 16:32:03,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 361 transitions, 7524 flow [2024-06-27 16:32:04,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 361 transitions, 7496 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 16:32:04,306 INFO L231 Difference]: Finished difference. Result has 201 places, 281 transitions, 5635 flow [2024-06-27 16:32:04,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5350, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5635, PETRI_PLACES=201, PETRI_TRANSITIONS=281} [2024-06-27 16:32:04,307 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 175 predicate places. [2024-06-27 16:32:04,307 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 281 transitions, 5635 flow [2024-06-27 16:32:04,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:04,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:04,307 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:04,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-06-27 16:32:04,518 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,SelfDestructingSolverStorable65 [2024-06-27 16:32:04,518 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:32:04,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:04,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1843293295, now seen corresponding path program 1 times [2024-06-27 16:32:04,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:04,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823507659] [2024-06-27 16:32:04,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:04,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:04,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:32:04,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:04,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823507659] [2024-06-27 16:32:04,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823507659] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:04,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886233664] [2024-06-27 16:32:04,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:04,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:04,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:04,576 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) [2024-06-27 16:32:04,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-06-27 16:32:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:04,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:32:04,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:04,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:32:04,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:32:04,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886233664] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:04,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:04,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-06-27 16:32:04,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357748465] [2024-06-27 16:32:04,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:04,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 16:32:04,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:04,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 16:32:04,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-06-27 16:32:04,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:32:04,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 281 transitions, 5635 flow. Second operand has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:04,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:04,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:32:04,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:05,693 INFO L124 PetriNetUnfolderBase]: 3070/5493 cut-off events. [2024-06-27 16:32:05,694 INFO L125 PetriNetUnfolderBase]: For 60752/60752 co-relation queries the response was YES. [2024-06-27 16:32:05,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35266 conditions, 5493 events. 3070/5493 cut-off events. For 60752/60752 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 36792 event pairs, 1291 based on Foata normal form. 176/5669 useless extension candidates. Maximal degree in co-relation 34168. Up to 3002 conditions per place. [2024-06-27 16:32:05,732 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 149 selfloop transitions, 6 changer transitions 277/433 dead transitions. [2024-06-27 16:32:05,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 433 transitions, 8178 flow [2024-06-27 16:32:05,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 16:32:05,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 16:32:05,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 185 transitions. [2024-06-27 16:32:05,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38865546218487396 [2024-06-27 16:32:05,733 INFO L175 Difference]: Start difference. First operand has 201 places, 281 transitions, 5635 flow. Second operand 17 states and 185 transitions. [2024-06-27 16:32:05,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 433 transitions, 8178 flow [2024-06-27 16:32:06,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 433 transitions, 8147 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-27 16:32:06,109 INFO L231 Difference]: Finished difference. Result has 224 places, 156 transitions, 2794 flow [2024-06-27 16:32:06,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4656, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2794, PETRI_PLACES=224, PETRI_TRANSITIONS=156} [2024-06-27 16:32:06,110 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 198 predicate places. [2024-06-27 16:32:06,110 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 156 transitions, 2794 flow [2024-06-27 16:32:06,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:06,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:06,110 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:06,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-06-27 16:32:06,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:06,321 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:32:06,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:06,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1338808210, now seen corresponding path program 2 times [2024-06-27 16:32:06,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:06,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906722868] [2024-06-27 16:32:06,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:06,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:32:06,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:06,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906722868] [2024-06-27 16:32:06,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906722868] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:06,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236637097] [2024-06-27 16:32:06,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:32:06,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:06,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:06,451 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) [2024-06-27 16:32:06,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-06-27 16:32:06,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:32:06,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:06,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-27 16:32:06,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:32:06,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:32:06,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236637097] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:06,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:06,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2024-06-27 16:32:06,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344319978] [2024-06-27 16:32:06,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:06,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:32:06,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:06,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:32:06,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2024-06-27 16:32:06,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:32:06,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 156 transitions, 2794 flow. Second operand has 24 states, 24 states have (on average 5.375) internal successors, (129), 24 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:06,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:06,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:32:06,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:07,439 INFO L124 PetriNetUnfolderBase]: 1925/3300 cut-off events. [2024-06-27 16:32:07,439 INFO L125 PetriNetUnfolderBase]: For 30733/30733 co-relation queries the response was YES. [2024-06-27 16:32:07,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19540 conditions, 3300 events. 1925/3300 cut-off events. For 30733/30733 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19167 event pairs, 439 based on Foata normal form. 76/3376 useless extension candidates. Maximal degree in co-relation 19442. Up to 1041 conditions per place. [2024-06-27 16:32:07,465 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 192 selfloop transitions, 44 changer transitions 0/237 dead transitions. [2024-06-27 16:32:07,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 237 transitions, 4291 flow [2024-06-27 16:32:07,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:32:07,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:32:07,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 105 transitions. [2024-06-27 16:32:07,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3125 [2024-06-27 16:32:07,466 INFO L175 Difference]: Start difference. First operand has 224 places, 156 transitions, 2794 flow. Second operand 12 states and 105 transitions. [2024-06-27 16:32:07,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 237 transitions, 4291 flow [2024-06-27 16:32:07,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 237 transitions, 3836 flow, removed 220 selfloop flow, removed 19 redundant places. [2024-06-27 16:32:07,546 INFO L231 Difference]: Finished difference. Result has 189 places, 157 transitions, 2546 flow [2024-06-27 16:32:07,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2423, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2546, PETRI_PLACES=189, PETRI_TRANSITIONS=157} [2024-06-27 16:32:07,547 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 163 predicate places. [2024-06-27 16:32:07,547 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 157 transitions, 2546 flow [2024-06-27 16:32:07,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.375) internal successors, (129), 24 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:07,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:07,547 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:07,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-06-27 16:32:07,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:07,750 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:32:07,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:07,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1172528820, now seen corresponding path program 2 times [2024-06-27 16:32:07,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:07,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195107558] [2024-06-27 16:32:07,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:07,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:32:07,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:07,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195107558] [2024-06-27 16:32:07,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195107558] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:07,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383395839] [2024-06-27 16:32:07,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:32:07,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:07,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:07,934 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) [2024-06-27 16:32:07,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-06-27 16:32:08,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:32:08,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:08,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-27 16:32:08,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:32:08,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:32:08,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383395839] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:08,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:08,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2024-06-27 16:32:08,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745534103] [2024-06-27 16:32:08,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:08,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:32:08,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:08,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:32:08,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:32:08,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:32:08,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 157 transitions, 2546 flow. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:08,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:08,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:32:08,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:08,899 INFO L124 PetriNetUnfolderBase]: 2122/3639 cut-off events. [2024-06-27 16:32:08,900 INFO L125 PetriNetUnfolderBase]: For 28600/28600 co-relation queries the response was YES. [2024-06-27 16:32:08,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21081 conditions, 3639 events. 2122/3639 cut-off events. For 28600/28600 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21067 event pairs, 150 based on Foata normal form. 87/3726 useless extension candidates. Maximal degree in co-relation 20996. Up to 929 conditions per place. [2024-06-27 16:32:08,923 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 159 selfloop transitions, 109 changer transitions 0/269 dead transitions. [2024-06-27 16:32:08,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 269 transitions, 4309 flow [2024-06-27 16:32:08,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 16:32:08,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 16:32:08,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 172 transitions. [2024-06-27 16:32:08,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30714285714285716 [2024-06-27 16:32:08,924 INFO L175 Difference]: Start difference. First operand has 189 places, 157 transitions, 2546 flow. Second operand 20 states and 172 transitions. [2024-06-27 16:32:08,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 269 transitions, 4309 flow [2024-06-27 16:32:08,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 269 transitions, 4070 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-27 16:32:08,984 INFO L231 Difference]: Finished difference. Result has 200 places, 186 transitions, 3268 flow [2024-06-27 16:32:08,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2404, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3268, PETRI_PLACES=200, PETRI_TRANSITIONS=186} [2024-06-27 16:32:08,985 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 174 predicate places. [2024-06-27 16:32:08,985 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 186 transitions, 3268 flow [2024-06-27 16:32:08,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:08,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:08,985 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:08,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-06-27 16:32:09,196 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,SelfDestructingSolverStorable68 [2024-06-27 16:32:09,196 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:32:09,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:09,197 INFO L85 PathProgramCache]: Analyzing trace with hash -708213165, now seen corresponding path program 1 times [2024-06-27 16:32:09,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:09,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305648885] [2024-06-27 16:32:09,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:09,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:32:09,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:09,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305648885] [2024-06-27 16:32:09,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305648885] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:09,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130052208] [2024-06-27 16:32:09,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:09,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:09,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:09,733 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) [2024-06-27 16:32:09,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-06-27 16:32:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:09,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:32:09,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:09,968 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-27 16:32:09,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 24 [2024-06-27 16:32:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:32:09,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:10,202 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-06-27 16:32:10,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 70 [2024-06-27 16:32:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:32:10,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130052208] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:10,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:10,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 27 [2024-06-27 16:32:10,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641602038] [2024-06-27 16:32:10,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:10,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 16:32:10,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:10,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 16:32:10,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2024-06-27 16:32:10,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:32:10,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 186 transitions, 3268 flow. Second operand has 27 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 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) [2024-06-27 16:32:10,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:10,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:32:10,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:11,222 INFO L124 PetriNetUnfolderBase]: 2147/3695 cut-off events. [2024-06-27 16:32:11,223 INFO L125 PetriNetUnfolderBase]: For 32603/32603 co-relation queries the response was YES. [2024-06-27 16:32:11,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22075 conditions, 3695 events. 2147/3695 cut-off events. For 32603/32603 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21934 event pairs, 632 based on Foata normal form. 6/3701 useless extension candidates. Maximal degree in co-relation 21991. Up to 1861 conditions per place. [2024-06-27 16:32:11,248 INFO L140 encePairwiseOnDemand]: 14/28 looper letters, 187 selfloop transitions, 80 changer transitions 21/289 dead transitions. [2024-06-27 16:32:11,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 289 transitions, 5000 flow [2024-06-27 16:32:11,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:32:11,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:32:11,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 141 transitions. [2024-06-27 16:32:11,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31473214285714285 [2024-06-27 16:32:11,250 INFO L175 Difference]: Start difference. First operand has 200 places, 186 transitions, 3268 flow. Second operand 16 states and 141 transitions. [2024-06-27 16:32:11,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 289 transitions, 5000 flow [2024-06-27 16:32:11,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 289 transitions, 4292 flow, removed 55 selfloop flow, removed 19 redundant places. [2024-06-27 16:32:11,332 INFO L231 Difference]: Finished difference. Result has 202 places, 191 transitions, 3006 flow [2024-06-27 16:32:11,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3006, PETRI_PLACES=202, PETRI_TRANSITIONS=191} [2024-06-27 16:32:11,333 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 176 predicate places. [2024-06-27 16:32:11,333 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 191 transitions, 3006 flow [2024-06-27 16:32:11,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 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) [2024-06-27 16:32:11,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:11,334 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:11,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-06-27 16:32:11,534 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,SelfDestructingSolverStorable69 [2024-06-27 16:32:11,534 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:32:11,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:11,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1771224109, now seen corresponding path program 2 times [2024-06-27 16:32:11,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:11,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369913740] [2024-06-27 16:32:11,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:11,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:32:11,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:11,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369913740] [2024-06-27 16:32:11,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369913740] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:11,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811838529] [2024-06-27 16:32:11,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:32:11,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:11,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:11,891 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) [2024-06-27 16:32:11,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-06-27 16:32:12,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:32:12,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:12,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:32:12,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:12,119 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:32:12,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2024-06-27 16:32:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:32:12,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:12,281 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:32:12,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 74 [2024-06-27 16:32:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:32:12,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811838529] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:12,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:12,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 24 [2024-06-27 16:32:12,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777198707] [2024-06-27 16:32:12,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:12,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:32:12,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:12,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:32:12,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2024-06-27 16:32:12,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:32:12,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 191 transitions, 3006 flow. Second operand has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 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) [2024-06-27 16:32:12,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:12,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:32:12,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:13,492 INFO L124 PetriNetUnfolderBase]: 2625/4560 cut-off events. [2024-06-27 16:32:13,492 INFO L125 PetriNetUnfolderBase]: For 28361/28361 co-relation queries the response was YES. [2024-06-27 16:32:13,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24188 conditions, 4560 events. 2625/4560 cut-off events. For 28361/28361 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 28268 event pairs, 421 based on Foata normal form. 4/4564 useless extension candidates. Maximal degree in co-relation 24102. Up to 1889 conditions per place. [2024-06-27 16:32:13,526 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 208 selfloop transitions, 103 changer transitions 25/337 dead transitions. [2024-06-27 16:32:13,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 337 transitions, 4778 flow [2024-06-27 16:32:13,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 16:32:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 16:32:13,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 230 transitions. [2024-06-27 16:32:13,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-27 16:32:13,528 INFO L175 Difference]: Start difference. First operand has 202 places, 191 transitions, 3006 flow. Second operand 23 states and 230 transitions. [2024-06-27 16:32:13,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 337 transitions, 4778 flow [2024-06-27 16:32:13,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 337 transitions, 4508 flow, removed 38 selfloop flow, removed 14 redundant places. [2024-06-27 16:32:13,601 INFO L231 Difference]: Finished difference. Result has 219 places, 217 transitions, 3489 flow [2024-06-27 16:32:13,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2800, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3489, PETRI_PLACES=219, PETRI_TRANSITIONS=217} [2024-06-27 16:32:13,602 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 193 predicate places. [2024-06-27 16:32:13,602 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 217 transitions, 3489 flow [2024-06-27 16:32:13,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 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) [2024-06-27 16:32:13,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:13,602 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:13,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-06-27 16:32:13,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:13,813 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:32:13,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:13,814 INFO L85 PathProgramCache]: Analyzing trace with hash -866563825, now seen corresponding path program 3 times [2024-06-27 16:32:13,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:13,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045485758] [2024-06-27 16:32:13,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:13,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:32:14,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:14,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045485758] [2024-06-27 16:32:14,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045485758] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:14,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989342148] [2024-06-27 16:32:14,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:32:14,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:14,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:14,115 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) [2024-06-27 16:32:14,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-06-27 16:32:14,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:32:14,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:14,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:32:14,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:14,398 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:32:14,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2024-06-27 16:32:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:32:14,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:14,631 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-06-27 16:32:14,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 70 [2024-06-27 16:32:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:32:14,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989342148] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:14,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:14,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 25 [2024-06-27 16:32:14,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387553114] [2024-06-27 16:32:14,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:14,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 16:32:14,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:14,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 16:32:14,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2024-06-27 16:32:14,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:32:14,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 217 transitions, 3489 flow. Second operand has 25 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:14,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:14,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:32:14,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:15,846 INFO L124 PetriNetUnfolderBase]: 2605/4517 cut-off events. [2024-06-27 16:32:15,846 INFO L125 PetriNetUnfolderBase]: For 35117/35117 co-relation queries the response was YES. [2024-06-27 16:32:15,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25078 conditions, 4517 events. 2605/4517 cut-off events. For 35117/35117 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 28033 event pairs, 533 based on Foata normal form. 1/4518 useless extension candidates. Maximal degree in co-relation 24983. Up to 2609 conditions per place. [2024-06-27 16:32:15,890 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 210 selfloop transitions, 94 changer transitions 8/313 dead transitions. [2024-06-27 16:32:15,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 313 transitions, 4991 flow [2024-06-27 16:32:15,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 16:32:15,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 16:32:15,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 154 transitions. [2024-06-27 16:32:15,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3235294117647059 [2024-06-27 16:32:15,894 INFO L175 Difference]: Start difference. First operand has 219 places, 217 transitions, 3489 flow. Second operand 17 states and 154 transitions. [2024-06-27 16:32:15,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 313 transitions, 4991 flow [2024-06-27 16:32:15,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 313 transitions, 4787 flow, removed 33 selfloop flow, removed 13 redundant places. [2024-06-27 16:32:15,989 INFO L231 Difference]: Finished difference. Result has 220 places, 221 transitions, 3557 flow [2024-06-27 16:32:15,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3307, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3557, PETRI_PLACES=220, PETRI_TRANSITIONS=221} [2024-06-27 16:32:15,990 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 194 predicate places. [2024-06-27 16:32:15,990 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 221 transitions, 3557 flow [2024-06-27 16:32:15,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:15,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:15,990 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:16,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-06-27 16:32:16,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:16,201 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:32:16,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:16,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1899259603, now seen corresponding path program 4 times [2024-06-27 16:32:16,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:16,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084724229] [2024-06-27 16:32:16,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:16,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:32:16,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:16,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084724229] [2024-06-27 16:32:16,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084724229] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:16,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268152484] [2024-06-27 16:32:16,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:32:16,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:16,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:16,673 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) [2024-06-27 16:32:16,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-06-27 16:32:16,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:32:16,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:16,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 16:32:16,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:16,993 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-27 16:32:16,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 24 [2024-06-27 16:32:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:32:17,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:17,167 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:32:17,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 74 [2024-06-27 16:32:17,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:32:17,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268152484] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:17,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:17,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 32 [2024-06-27 16:32:17,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370538312] [2024-06-27 16:32:17,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:17,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:32:17,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:17,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:32:17,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2024-06-27 16:32:17,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:32:17,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 221 transitions, 3557 flow. Second operand has 32 states, 32 states have (on average 5.375) internal successors, (172), 32 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:17,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:17,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:32:17,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:18,601 INFO L124 PetriNetUnfolderBase]: 2645/4601 cut-off events. [2024-06-27 16:32:18,601 INFO L125 PetriNetUnfolderBase]: For 34470/34470 co-relation queries the response was YES. [2024-06-27 16:32:18,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25436 conditions, 4601 events. 2645/4601 cut-off events. For 34470/34470 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 28635 event pairs, 378 based on Foata normal form. 2/4603 useless extension candidates. Maximal degree in co-relation 25343. Up to 1894 conditions per place. [2024-06-27 16:32:18,633 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 225 selfloop transitions, 118 changer transitions 12/356 dead transitions. [2024-06-27 16:32:18,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 356 transitions, 5173 flow [2024-06-27 16:32:18,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:32:18,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:32:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 246 transitions. [2024-06-27 16:32:18,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3514285714285714 [2024-06-27 16:32:18,635 INFO L175 Difference]: Start difference. First operand has 220 places, 221 transitions, 3557 flow. Second operand 25 states and 246 transitions. [2024-06-27 16:32:18,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 356 transitions, 5173 flow [2024-06-27 16:32:18,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 356 transitions, 5025 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-27 16:32:18,734 INFO L231 Difference]: Finished difference. Result has 241 places, 235 transitions, 3878 flow [2024-06-27 16:32:18,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3430, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3878, PETRI_PLACES=241, PETRI_TRANSITIONS=235} [2024-06-27 16:32:18,734 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 215 predicate places. [2024-06-27 16:32:18,735 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 235 transitions, 3878 flow [2024-06-27 16:32:18,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.375) internal successors, (172), 32 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:18,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:18,735 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:18,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-06-27 16:32:18,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:18,945 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:32:18,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:18,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1111156691, now seen corresponding path program 5 times [2024-06-27 16:32:18,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:18,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135079302] [2024-06-27 16:32:18,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:18,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:32:19,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:19,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135079302] [2024-06-27 16:32:19,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135079302] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:19,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81179121] [2024-06-27 16:32:19,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:32:19,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:19,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:19,262 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) [2024-06-27 16:32:19,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-06-27 16:32:19,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 16:32:19,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:19,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:32:19,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:19,517 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-27 16:32:19,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 24 [2024-06-27 16:32:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:32:19,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:19,707 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 16:32:19,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 78 [2024-06-27 16:32:19,767 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:32:19,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81179121] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:19,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:19,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 26 [2024-06-27 16:32:19,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67372560] [2024-06-27 16:32:19,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:19,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:32:19,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:19,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:32:19,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:32:19,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:32:19,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 235 transitions, 3878 flow. Second operand has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 26 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) [2024-06-27 16:32:19,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:19,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:32:19,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:21,162 INFO L124 PetriNetUnfolderBase]: 3028/5314 cut-off events. [2024-06-27 16:32:21,162 INFO L125 PetriNetUnfolderBase]: For 41402/41402 co-relation queries the response was YES. [2024-06-27 16:32:21,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29723 conditions, 5314 events. 3028/5314 cut-off events. For 41402/41402 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 34205 event pairs, 727 based on Foata normal form. 4/5318 useless extension candidates. Maximal degree in co-relation 29622. Up to 3907 conditions per place. [2024-06-27 16:32:21,202 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 248 selfloop transitions, 100 changer transitions 19/368 dead transitions. [2024-06-27 16:32:21,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 368 transitions, 5772 flow [2024-06-27 16:32:21,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 16:32:21,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 16:32:21,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 219 transitions. [2024-06-27 16:32:21,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34006211180124224 [2024-06-27 16:32:21,204 INFO L175 Difference]: Start difference. First operand has 241 places, 235 transitions, 3878 flow. Second operand 23 states and 219 transitions. [2024-06-27 16:32:21,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 368 transitions, 5772 flow [2024-06-27 16:32:21,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 368 transitions, 5486 flow, removed 25 selfloop flow, removed 17 redundant places. [2024-06-27 16:32:21,331 INFO L231 Difference]: Finished difference. Result has 254 places, 267 transitions, 4379 flow [2024-06-27 16:32:21,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3640, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4379, PETRI_PLACES=254, PETRI_TRANSITIONS=267} [2024-06-27 16:32:21,332 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 228 predicate places. [2024-06-27 16:32:21,332 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 267 transitions, 4379 flow [2024-06-27 16:32:21,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 26 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) [2024-06-27 16:32:21,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:21,333 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:21,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-06-27 16:32:21,538 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,SelfDestructingSolverStorable73 [2024-06-27 16:32:21,538 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:32:21,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:21,538 INFO L85 PathProgramCache]: Analyzing trace with hash 617373233, now seen corresponding path program 6 times [2024-06-27 16:32:21,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:21,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736250786] [2024-06-27 16:32:21,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:21,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:32:21,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:21,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736250786] [2024-06-27 16:32:21,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736250786] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:21,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585345989] [2024-06-27 16:32:21,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:32:21,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:21,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:21,905 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) [2024-06-27 16:32:21,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-06-27 16:32:22,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 16:32:22,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:22,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:32:22,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:22,174 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:32:22,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2024-06-27 16:32:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:32:22,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:22,366 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 16:32:22,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 78 [2024-06-27 16:32:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:32:22,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585345989] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:22,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:22,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 24 [2024-06-27 16:32:22,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625923901] [2024-06-27 16:32:22,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:22,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:32:22,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:22,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:32:22,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2024-06-27 16:32:22,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:32:22,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 267 transitions, 4379 flow. Second operand has 24 states, 24 states have (on average 5.416666666666667) internal successors, (130), 24 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:22,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:22,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:32:22,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:23,973 INFO L124 PetriNetUnfolderBase]: 3344/5861 cut-off events. [2024-06-27 16:32:23,973 INFO L125 PetriNetUnfolderBase]: For 48480/48480 co-relation queries the response was YES. [2024-06-27 16:32:24,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33167 conditions, 5861 events. 3344/5861 cut-off events. For 48480/48480 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 38387 event pairs, 1503 based on Foata normal form. 13/5874 useless extension candidates. Maximal degree in co-relation 33058. Up to 4156 conditions per place. [2024-06-27 16:32:24,013 INFO L140 encePairwiseOnDemand]: 14/28 looper letters, 243 selfloop transitions, 127 changer transitions 30/401 dead transitions. [2024-06-27 16:32:24,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 401 transitions, 6321 flow [2024-06-27 16:32:24,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 16:32:24,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 16:32:24,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 215 transitions. [2024-06-27 16:32:24,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3338509316770186 [2024-06-27 16:32:24,015 INFO L175 Difference]: Start difference. First operand has 254 places, 267 transitions, 4379 flow. Second operand 23 states and 215 transitions. [2024-06-27 16:32:24,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 401 transitions, 6321 flow [2024-06-27 16:32:24,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 401 transitions, 6162 flow, removed 66 selfloop flow, removed 10 redundant places. [2024-06-27 16:32:24,155 INFO L231 Difference]: Finished difference. Result has 273 places, 298 transitions, 5014 flow [2024-06-27 16:32:24,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4254, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5014, PETRI_PLACES=273, PETRI_TRANSITIONS=298} [2024-06-27 16:32:24,156 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 247 predicate places. [2024-06-27 16:32:24,156 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 298 transitions, 5014 flow [2024-06-27 16:32:24,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.416666666666667) internal successors, (130), 24 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:24,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:24,157 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:24,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-06-27 16:32:24,367 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,SelfDestructingSolverStorable74 [2024-06-27 16:32:24,368 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:32:24,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:24,368 INFO L85 PathProgramCache]: Analyzing trace with hash -9426755, now seen corresponding path program 7 times [2024-06-27 16:32:24,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:24,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303242337] [2024-06-27 16:32:24,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:24,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:32:24,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:24,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303242337] [2024-06-27 16:32:24,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303242337] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:24,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126793631] [2024-06-27 16:32:24,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:32:24,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:24,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:24,660 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) [2024-06-27 16:32:24,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-06-27 16:32:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:24,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:32:24,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:24,880 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-27 16:32:24,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 24 [2024-06-27 16:32:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:32:24,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:25,058 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:32:25,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 74 [2024-06-27 16:32:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:32:25,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126793631] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:25,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:25,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 25 [2024-06-27 16:32:25,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339228370] [2024-06-27 16:32:25,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:25,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 16:32:25,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:25,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 16:32:25,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2024-06-27 16:32:25,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:32:25,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 298 transitions, 5014 flow. Second operand has 25 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:25,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:25,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:32:25,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:26,459 INFO L124 PetriNetUnfolderBase]: 3255/5680 cut-off events. [2024-06-27 16:32:26,460 INFO L125 PetriNetUnfolderBase]: For 50301/50301 co-relation queries the response was YES. [2024-06-27 16:32:26,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32722 conditions, 5680 events. 3255/5680 cut-off events. For 50301/50301 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 36678 event pairs, 872 based on Foata normal form. 2/5682 useless extension candidates. Maximal degree in co-relation 32606. Up to 4353 conditions per place. [2024-06-27 16:32:26,507 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 263 selfloop transitions, 103 changer transitions 12/379 dead transitions. [2024-06-27 16:32:26,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 379 transitions, 6339 flow [2024-06-27 16:32:26,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:32:26,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:32:26,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 198 transitions. [2024-06-27 16:32:26,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.336734693877551 [2024-06-27 16:32:26,508 INFO L175 Difference]: Start difference. First operand has 273 places, 298 transitions, 5014 flow. Second operand 21 states and 198 transitions. [2024-06-27 16:32:26,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 379 transitions, 6339 flow [2024-06-27 16:32:26,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 379 transitions, 6089 flow, removed 31 selfloop flow, removed 15 redundant places. [2024-06-27 16:32:26,675 INFO L231 Difference]: Finished difference. Result has 279 places, 305 transitions, 5120 flow [2024-06-27 16:32:26,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4778, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5120, PETRI_PLACES=279, PETRI_TRANSITIONS=305} [2024-06-27 16:32:26,676 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 253 predicate places. [2024-06-27 16:32:26,676 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 305 transitions, 5120 flow [2024-06-27 16:32:26,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:26,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:26,676 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:26,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-06-27 16:32:26,887 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,SelfDestructingSolverStorable75 [2024-06-27 16:32:26,887 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:32:26,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:26,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1414717791, now seen corresponding path program 8 times [2024-06-27 16:32:26,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:26,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686127251] [2024-06-27 16:32:26,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:26,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:32:27,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:27,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686127251] [2024-06-27 16:32:27,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686127251] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:27,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073295821] [2024-06-27 16:32:27,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:32:27,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:27,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:27,217 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) [2024-06-27 16:32:27,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-06-27 16:32:27,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:32:27,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:27,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:32:27,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:27,486 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:32:27,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2024-06-27 16:32:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:32:27,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:27,639 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:32:27,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 74 [2024-06-27 16:32:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 16:32:27,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073295821] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:27,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:27,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 23 [2024-06-27 16:32:27,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876674191] [2024-06-27 16:32:27,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:27,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 16:32:27,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:27,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 16:32:27,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2024-06-27 16:32:27,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:32:27,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 305 transitions, 5120 flow. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 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) [2024-06-27 16:32:27,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:27,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:32:27,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:29,162 INFO L124 PetriNetUnfolderBase]: 3743/6570 cut-off events. [2024-06-27 16:32:29,163 INFO L125 PetriNetUnfolderBase]: For 58112/58112 co-relation queries the response was YES. [2024-06-27 16:32:29,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37334 conditions, 6570 events. 3743/6570 cut-off events. For 58112/58112 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 44059 event pairs, 1883 based on Foata normal form. 2/6572 useless extension candidates. Maximal degree in co-relation 37218. Up to 5024 conditions per place. [2024-06-27 16:32:29,217 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 336 selfloop transitions, 90 changer transitions 12/439 dead transitions. [2024-06-27 16:32:29,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 439 transitions, 7150 flow [2024-06-27 16:32:29,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 16:32:29,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 16:32:29,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 229 transitions. [2024-06-27 16:32:29,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3555900621118012 [2024-06-27 16:32:29,218 INFO L175 Difference]: Start difference. First operand has 279 places, 305 transitions, 5120 flow. Second operand 23 states and 229 transitions. [2024-06-27 16:32:29,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 439 transitions, 7150 flow [2024-06-27 16:32:29,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 439 transitions, 6912 flow, removed 35 selfloop flow, removed 14 redundant places. [2024-06-27 16:32:29,412 INFO L231 Difference]: Finished difference. Result has 295 places, 336 transitions, 5613 flow [2024-06-27 16:32:29,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4910, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5613, PETRI_PLACES=295, PETRI_TRANSITIONS=336} [2024-06-27 16:32:29,413 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 269 predicate places. [2024-06-27 16:32:29,413 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 336 transitions, 5613 flow [2024-06-27 16:32:29,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 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) [2024-06-27 16:32:29,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:29,413 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:29,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-06-27 16:32:29,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:29,624 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:32:29,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:29,624 INFO L85 PathProgramCache]: Analyzing trace with hash 86020371, now seen corresponding path program 9 times [2024-06-27 16:32:29,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:29,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741787949] [2024-06-27 16:32:29,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:29,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:32:29,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:29,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741787949] [2024-06-27 16:32:29,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741787949] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:29,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502089013] [2024-06-27 16:32:29,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:32:29,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:29,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:29,946 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) [2024-06-27 16:32:29,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-06-27 16:32:30,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:32:30,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:30,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:32:30,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:30,179 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:32:30,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2024-06-27 16:32:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:32:30,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:30,295 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:32:30,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 74 [2024-06-27 16:32:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-06-27 16:32:30,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502089013] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:30,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:30,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 23 [2024-06-27 16:32:30,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458064981] [2024-06-27 16:32:30,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:30,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 16:32:30,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:30,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 16:32:30,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2024-06-27 16:32:30,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:32:30,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 336 transitions, 5613 flow. Second operand has 23 states, 23 states have (on average 5.391304347826087) internal successors, (124), 23 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:30,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:30,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:32:30,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:32,530 INFO L124 PetriNetUnfolderBase]: 4440/7844 cut-off events. [2024-06-27 16:32:32,531 INFO L125 PetriNetUnfolderBase]: For 76964/76964 co-relation queries the response was YES. [2024-06-27 16:32:32,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45179 conditions, 7844 events. 4440/7844 cut-off events. For 76964/76964 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 55080 event pairs, 2180 based on Foata normal form. 17/7861 useless extension candidates. Maximal degree in co-relation 45055. Up to 5780 conditions per place. [2024-06-27 16:32:32,601 INFO L140 encePairwiseOnDemand]: 14/28 looper letters, 369 selfloop transitions, 127 changer transitions 37/534 dead transitions. [2024-06-27 16:32:32,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 534 transitions, 8471 flow [2024-06-27 16:32:32,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-06-27 16:32:32,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-06-27 16:32:32,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 336 transitions. [2024-06-27 16:32:32,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-27 16:32:32,603 INFO L175 Difference]: Start difference. First operand has 295 places, 336 transitions, 5613 flow. Second operand 36 states and 336 transitions. [2024-06-27 16:32:32,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 534 transitions, 8471 flow [2024-06-27 16:32:32,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 534 transitions, 8273 flow, removed 84 selfloop flow, removed 8 redundant places. [2024-06-27 16:32:32,890 INFO L231 Difference]: Finished difference. Result has 344 places, 388 transitions, 6698 flow [2024-06-27 16:32:32,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5445, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=6698, PETRI_PLACES=344, PETRI_TRANSITIONS=388} [2024-06-27 16:32:32,890 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 318 predicate places. [2024-06-27 16:32:32,890 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 388 transitions, 6698 flow [2024-06-27 16:32:32,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.391304347826087) internal successors, (124), 23 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:32,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:32,891 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:32,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-06-27 16:32:33,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:33,094 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:32:33,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:33,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1698137527, now seen corresponding path program 10 times [2024-06-27 16:32:33,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:33,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37655415] [2024-06-27 16:32:33,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:33,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:32:33,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:33,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37655415] [2024-06-27 16:32:33,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37655415] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:33,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793540795] [2024-06-27 16:32:33,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:32:33,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:33,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:33,381 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) [2024-06-27 16:32:33,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-06-27 16:32:33,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:32:33,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:33,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 16:32:33,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:33,662 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-27 16:32:33,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 24 [2024-06-27 16:32:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:32:33,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:33,837 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:32:33,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 74 [2024-06-27 16:32:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:32:33,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793540795] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:33,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:33,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 29 [2024-06-27 16:32:33,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827809506] [2024-06-27 16:32:33,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:33,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:32:33,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:33,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:32:33,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:32:33,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:32:33,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 388 transitions, 6698 flow. Second operand has 29 states, 29 states have (on average 5.551724137931035) internal successors, (161), 29 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:33,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:33,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:32:33,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:36,113 INFO L124 PetriNetUnfolderBase]: 4787/8496 cut-off events. [2024-06-27 16:32:36,114 INFO L125 PetriNetUnfolderBase]: For 113121/113121 co-relation queries the response was YES. [2024-06-27 16:32:36,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52792 conditions, 8496 events. 4787/8496 cut-off events. For 113121/113121 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 60988 event pairs, 1121 based on Foata normal form. 4/8500 useless extension candidates. Maximal degree in co-relation 52646. Up to 4188 conditions per place. [2024-06-27 16:32:36,198 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 379 selfloop transitions, 167 changer transitions 14/561 dead transitions. [2024-06-27 16:32:36,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 561 transitions, 9925 flow [2024-06-27 16:32:36,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 16:32:36,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 16:32:36,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 251 transitions. [2024-06-27 16:32:36,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3447802197802198 [2024-06-27 16:32:36,199 INFO L175 Difference]: Start difference. First operand has 344 places, 388 transitions, 6698 flow. Second operand 26 states and 251 transitions. [2024-06-27 16:32:36,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 561 transitions, 9925 flow [2024-06-27 16:32:36,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 561 transitions, 9154 flow, removed 330 selfloop flow, removed 20 redundant places. [2024-06-27 16:32:36,714 INFO L231 Difference]: Finished difference. Result has 353 places, 420 transitions, 7215 flow [2024-06-27 16:32:36,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6151, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7215, PETRI_PLACES=353, PETRI_TRANSITIONS=420} [2024-06-27 16:32:36,715 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 327 predicate places. [2024-06-27 16:32:36,715 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 420 transitions, 7215 flow [2024-06-27 16:32:36,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.551724137931035) internal successors, (161), 29 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:36,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:36,716 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:36,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-06-27 16:32:36,920 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,SelfDestructingSolverStorable78 [2024-06-27 16:32:36,920 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:32:36,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:36,921 INFO L85 PathProgramCache]: Analyzing trace with hash 138303755, now seen corresponding path program 11 times [2024-06-27 16:32:36,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:36,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28259561] [2024-06-27 16:32:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:36,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:37,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:32:37,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:37,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28259561] [2024-06-27 16:32:37,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28259561] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:37,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337299651] [2024-06-27 16:32:37,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:32:37,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:37,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:37,231 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) [2024-06-27 16:32:37,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-06-27 16:32:37,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:32:37,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:37,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:32:37,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:37,505 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-27 16:32:37,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 24 [2024-06-27 16:32:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:32:37,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:37,648 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:32:37,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 74 [2024-06-27 16:32:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 16:32:37,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337299651] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:37,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:37,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 27 [2024-06-27 16:32:37,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955506981] [2024-06-27 16:32:37,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:37,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 16:32:37,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:37,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 16:32:37,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2024-06-27 16:32:37,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:32:37,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 420 transitions, 7215 flow. Second operand has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 27 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:37,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:37,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:32:37,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:39,820 INFO L124 PetriNetUnfolderBase]: 4751/8412 cut-off events. [2024-06-27 16:32:39,820 INFO L125 PetriNetUnfolderBase]: For 121772/121772 co-relation queries the response was YES. [2024-06-27 16:32:39,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53040 conditions, 8412 events. 4751/8412 cut-off events. For 121772/121772 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 60085 event pairs, 1450 based on Foata normal form. 2/8414 useless extension candidates. Maximal degree in co-relation 52893. Up to 6596 conditions per place. [2024-06-27 16:32:39,908 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 372 selfloop transitions, 110 changer transitions 14/497 dead transitions. [2024-06-27 16:32:39,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 497 transitions, 8875 flow [2024-06-27 16:32:39,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:32:39,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:32:39,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 199 transitions. [2024-06-27 16:32:39,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33843537414965985 [2024-06-27 16:32:39,909 INFO L175 Difference]: Start difference. First operand has 353 places, 420 transitions, 7215 flow. Second operand 21 states and 199 transitions. [2024-06-27 16:32:39,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 497 transitions, 8875 flow [2024-06-27 16:32:40,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 497 transitions, 8441 flow, removed 152 selfloop flow, removed 14 redundant places. [2024-06-27 16:32:40,392 INFO L231 Difference]: Finished difference. Result has 359 places, 416 transitions, 7001 flow [2024-06-27 16:32:40,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6833, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7001, PETRI_PLACES=359, PETRI_TRANSITIONS=416} [2024-06-27 16:32:40,393 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 333 predicate places. [2024-06-27 16:32:40,393 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 416 transitions, 7001 flow [2024-06-27 16:32:40,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 27 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:40,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:40,393 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:40,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-06-27 16:32:40,595 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,SelfDestructingSolverStorable79 [2024-06-27 16:32:40,595 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:32:40,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:40,595 INFO L85 PathProgramCache]: Analyzing trace with hash 60385027, now seen corresponding path program 12 times [2024-06-27 16:32:40,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:40,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133360575] [2024-06-27 16:32:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:40,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:32:40,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:40,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133360575] [2024-06-27 16:32:40,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133360575] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:40,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761251851] [2024-06-27 16:32:40,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:32:40,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:40,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:40,983 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) [2024-06-27 16:32:40,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-06-27 16:32:41,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:32:41,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:41,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:32:41,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:41,222 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:32:41,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2024-06-27 16:32:41,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:32:41,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:41,369 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:32:41,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 74 [2024-06-27 16:32:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 16:32:41,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761251851] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:41,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:41,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 24 [2024-06-27 16:32:41,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973607508] [2024-06-27 16:32:41,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:41,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:32:41,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:41,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:32:41,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2024-06-27 16:32:41,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:32:41,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 416 transitions, 7001 flow. Second operand has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 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) [2024-06-27 16:32:41,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:41,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:32:41,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:44,006 INFO L124 PetriNetUnfolderBase]: 4886/8694 cut-off events. [2024-06-27 16:32:44,006 INFO L125 PetriNetUnfolderBase]: For 123860/123860 co-relation queries the response was YES. [2024-06-27 16:32:44,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54601 conditions, 8694 events. 4886/8694 cut-off events. For 123860/123860 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 62892 event pairs, 2648 based on Foata normal form. 26/8720 useless extension candidates. Maximal degree in co-relation 54456. Up to 6866 conditions per place. [2024-06-27 16:32:44,097 INFO L140 encePairwiseOnDemand]: 14/28 looper letters, 422 selfloop transitions, 126 changer transitions 32/581 dead transitions. [2024-06-27 16:32:44,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 581 transitions, 9823 flow [2024-06-27 16:32:44,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-06-27 16:32:44,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-06-27 16:32:44,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 328 transitions. [2024-06-27 16:32:44,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3253968253968254 [2024-06-27 16:32:44,098 INFO L175 Difference]: Start difference. First operand has 359 places, 416 transitions, 7001 flow. Second operand 36 states and 328 transitions. [2024-06-27 16:32:44,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 581 transitions, 9823 flow [2024-06-27 16:32:44,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 581 transitions, 9551 flow, removed 34 selfloop flow, removed 17 redundant places. [2024-06-27 16:32:44,601 INFO L231 Difference]: Finished difference. Result has 387 places, 448 transitions, 7785 flow [2024-06-27 16:32:44,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6774, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=7785, PETRI_PLACES=387, PETRI_TRANSITIONS=448} [2024-06-27 16:32:44,601 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 361 predicate places. [2024-06-27 16:32:44,602 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 448 transitions, 7785 flow [2024-06-27 16:32:44,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 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) [2024-06-27 16:32:44,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:44,602 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:44,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-06-27 16:32:44,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:44,813 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:32:44,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:44,813 INFO L85 PathProgramCache]: Analyzing trace with hash 2090226533, now seen corresponding path program 13 times [2024-06-27 16:32:44,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:44,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467739684] [2024-06-27 16:32:44,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:44,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:32:45,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:45,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467739684] [2024-06-27 16:32:45,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467739684] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:45,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172767526] [2024-06-27 16:32:45,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:32:45,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:45,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:45,215 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:32:45,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-06-27 16:32:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:45,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:32:45,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:45,486 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-27 16:32:45,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 24 [2024-06-27 16:32:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:32:45,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:45,707 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 16:32:45,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 78 [2024-06-27 16:32:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:32:45,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172767526] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:45,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:45,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2024-06-27 16:32:45,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029807424] [2024-06-27 16:32:45,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:45,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 16:32:45,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:45,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 16:32:45,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2024-06-27 16:32:45,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:32:45,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 448 transitions, 7785 flow. Second operand has 27 states, 27 states have (on average 5.37037037037037) internal successors, (145), 27 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:45,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:45,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:32:45,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:48,154 INFO L124 PetriNetUnfolderBase]: 4816/8528 cut-off events. [2024-06-27 16:32:48,155 INFO L125 PetriNetUnfolderBase]: For 129950/129950 co-relation queries the response was YES. [2024-06-27 16:32:48,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54982 conditions, 8528 events. 4816/8528 cut-off events. For 129950/129950 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 61016 event pairs, 1399 based on Foata normal form. 3/8531 useless extension candidates. Maximal degree in co-relation 54827. Up to 6728 conditions per place. [2024-06-27 16:32:48,250 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 410 selfloop transitions, 130 changer transitions 12/553 dead transitions. [2024-06-27 16:32:48,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 553 transitions, 10018 flow [2024-06-27 16:32:48,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:32:48,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:32:48,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 208 transitions. [2024-06-27 16:32:48,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33766233766233766 [2024-06-27 16:32:48,251 INFO L175 Difference]: Start difference. First operand has 387 places, 448 transitions, 7785 flow. Second operand 22 states and 208 transitions. [2024-06-27 16:32:48,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 553 transitions, 10018 flow [2024-06-27 16:32:48,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 553 transitions, 9589 flow, removed 168 selfloop flow, removed 19 redundant places. [2024-06-27 16:32:48,855 INFO L231 Difference]: Finished difference. Result has 385 places, 463 transitions, 8088 flow [2024-06-27 16:32:48,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=7396, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8088, PETRI_PLACES=385, PETRI_TRANSITIONS=463} [2024-06-27 16:32:48,856 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 359 predicate places. [2024-06-27 16:32:48,856 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 463 transitions, 8088 flow [2024-06-27 16:32:48,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.37037037037037) internal successors, (145), 27 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:48,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:48,857 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:48,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-06-27 16:32:49,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:49,067 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:32:49,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:49,068 INFO L85 PathProgramCache]: Analyzing trace with hash 551919687, now seen corresponding path program 14 times [2024-06-27 16:32:49,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:49,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443708836] [2024-06-27 16:32:49,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:49,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:32:49,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:49,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443708836] [2024-06-27 16:32:49,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443708836] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:49,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312715169] [2024-06-27 16:32:49,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:32:49,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:49,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:49,371 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:32:49,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-06-27 16:32:49,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:32:49,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:49,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:32:49,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:49,618 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:32:49,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2024-06-27 16:32:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:32:49,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:49,763 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:32:49,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 74 [2024-06-27 16:32:49,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-06-27 16:32:49,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312715169] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:49,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:49,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 8] total 23 [2024-06-27 16:32:49,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618148240] [2024-06-27 16:32:49,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:49,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 16:32:49,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:49,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 16:32:49,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2024-06-27 16:32:49,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:32:49,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 463 transitions, 8088 flow. Second operand has 23 states, 23 states have (on average 5.608695652173913) internal successors, (129), 23 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:49,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:49,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:32:49,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:52,088 INFO L124 PetriNetUnfolderBase]: 4834/8559 cut-off events. [2024-06-27 16:32:52,089 INFO L125 PetriNetUnfolderBase]: For 125557/125557 co-relation queries the response was YES. [2024-06-27 16:32:52,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54500 conditions, 8559 events. 4834/8559 cut-off events. For 125557/125557 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 61193 event pairs, 1475 based on Foata normal form. 4/8563 useless extension candidates. Maximal degree in co-relation 54348. Up to 6808 conditions per place. [2024-06-27 16:32:52,185 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 425 selfloop transitions, 109 changer transitions 24/559 dead transitions. [2024-06-27 16:32:52,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 559 transitions, 9818 flow [2024-06-27 16:32:52,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:32:52,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:32:52,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 242 transitions. [2024-06-27 16:32:52,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3457142857142857 [2024-06-27 16:32:52,187 INFO L175 Difference]: Start difference. First operand has 385 places, 463 transitions, 8088 flow. Second operand 25 states and 242 transitions. [2024-06-27 16:32:52,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 559 transitions, 9818 flow [2024-06-27 16:32:52,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 559 transitions, 9580 flow, removed 54 selfloop flow, removed 14 redundant places. [2024-06-27 16:32:52,707 INFO L231 Difference]: Finished difference. Result has 400 places, 464 transitions, 8135 flow [2024-06-27 16:32:52,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=7870, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8135, PETRI_PLACES=400, PETRI_TRANSITIONS=464} [2024-06-27 16:32:52,708 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 374 predicate places. [2024-06-27 16:32:52,708 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 464 transitions, 8135 flow [2024-06-27 16:32:52,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.608695652173913) internal successors, (129), 23 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:52,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:52,708 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:52,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-06-27 16:32:52,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:52,919 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:32:52,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:52,919 INFO L85 PathProgramCache]: Analyzing trace with hash -659537611, now seen corresponding path program 15 times [2024-06-27 16:32:52,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:52,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740712366] [2024-06-27 16:32:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:52,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:32:53,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:53,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740712366] [2024-06-27 16:32:53,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740712366] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:53,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021434453] [2024-06-27 16:32:53,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:32:53,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:53,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:53,313 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:32:53,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-06-27 16:32:53,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:32:53,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:53,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 47 conjunts are in the unsatisfiable core [2024-06-27 16:32:53,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:53,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:32:53,608 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:32:53,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2024-06-27 16:32:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:32:53,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:32:53,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021434453] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:53,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:53,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 9] total 25 [2024-06-27 16:32:53,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082734538] [2024-06-27 16:32:53,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:53,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 16:32:53,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:53,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 16:32:53,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2024-06-27 16:32:53,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:32:53,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 464 transitions, 8135 flow. Second operand has 25 states, 25 states have (on average 5.32) internal successors, (133), 25 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) [2024-06-27 16:32:53,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:53,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:32:53,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:56,641 INFO L124 PetriNetUnfolderBase]: 4824/8537 cut-off events. [2024-06-27 16:32:56,641 INFO L125 PetriNetUnfolderBase]: For 123193/123193 co-relation queries the response was YES. [2024-06-27 16:32:56,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54626 conditions, 8537 events. 4824/8537 cut-off events. For 123193/123193 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 60823 event pairs, 2847 based on Foata normal form. 2/8539 useless extension candidates. Maximal degree in co-relation 54471. Up to 7420 conditions per place. [2024-06-27 16:32:56,739 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 429 selfloop transitions, 98 changer transitions 12/540 dead transitions. [2024-06-27 16:32:56,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 540 transitions, 9879 flow [2024-06-27 16:32:56,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 16:32:56,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 16:32:56,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 177 transitions. [2024-06-27 16:32:56,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33270676691729323 [2024-06-27 16:32:56,740 INFO L175 Difference]: Start difference. First operand has 400 places, 464 transitions, 8135 flow. Second operand 19 states and 177 transitions. [2024-06-27 16:32:56,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 540 transitions, 9879 flow [2024-06-27 16:32:57,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 540 transitions, 9664 flow, removed 22 selfloop flow, removed 21 redundant places. [2024-06-27 16:32:57,244 INFO L231 Difference]: Finished difference. Result has 396 places, 475 transitions, 8379 flow [2024-06-27 16:32:57,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=7957, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8379, PETRI_PLACES=396, PETRI_TRANSITIONS=475} [2024-06-27 16:32:57,245 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 370 predicate places. [2024-06-27 16:32:57,245 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 475 transitions, 8379 flow [2024-06-27 16:32:57,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.32) internal successors, (133), 25 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) [2024-06-27 16:32:57,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:57,245 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:57,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-06-27 16:32:57,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:57,456 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:32:57,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:57,456 INFO L85 PathProgramCache]: Analyzing trace with hash -564225657, now seen corresponding path program 16 times [2024-06-27 16:32:57,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:57,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347542504] [2024-06-27 16:32:57,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:57,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:32:57,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:57,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347542504] [2024-06-27 16:32:57,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347542504] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:57,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907377790] [2024-06-27 16:32:57,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:32:57,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:57,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:57,833 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:32:57,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-06-27 16:32:57,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:32:57,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:57,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 16:32:57,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:58,169 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-27 16:32:58,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 24 [2024-06-27 16:32:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:32:58,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:58,366 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:32:58,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 74 [2024-06-27 16:32:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:32:58,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907377790] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:58,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:58,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 29 [2024-06-27 16:32:58,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556657174] [2024-06-27 16:32:58,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:58,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:32:58,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:58,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:32:58,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:32:58,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:32:58,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 475 transitions, 8379 flow. Second operand has 29 states, 29 states have (on average 5.551724137931035) internal successors, (161), 29 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:58,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:58,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:32:58,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:00,904 INFO L124 PetriNetUnfolderBase]: 4900/8666 cut-off events. [2024-06-27 16:33:00,904 INFO L125 PetriNetUnfolderBase]: For 126831/126831 co-relation queries the response was YES. [2024-06-27 16:33:00,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55778 conditions, 8666 events. 4900/8666 cut-off events. For 126831/126831 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 61868 event pairs, 1159 based on Foata normal form. 4/8670 useless extension candidates. Maximal degree in co-relation 55622. Up to 4330 conditions per place. [2024-06-27 16:33:01,004 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 412 selfloop transitions, 197 changer transitions 24/634 dead transitions. [2024-06-27 16:33:01,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 634 transitions, 11264 flow [2024-06-27 16:33:01,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 16:33:01,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 16:33:01,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 265 transitions. [2024-06-27 16:33:01,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3505291005291005 [2024-06-27 16:33:01,005 INFO L175 Difference]: Start difference. First operand has 396 places, 475 transitions, 8379 flow. Second operand 27 states and 265 transitions. [2024-06-27 16:33:01,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 634 transitions, 11264 flow [2024-06-27 16:33:01,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 634 transitions, 11034 flow, removed 39 selfloop flow, removed 13 redundant places. [2024-06-27 16:33:01,955 INFO L231 Difference]: Finished difference. Result has 414 places, 496 transitions, 8994 flow [2024-06-27 16:33:01,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=8173, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8994, PETRI_PLACES=414, PETRI_TRANSITIONS=496} [2024-06-27 16:33:01,956 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 388 predicate places. [2024-06-27 16:33:01,956 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 496 transitions, 8994 flow [2024-06-27 16:33:01,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.551724137931035) internal successors, (161), 29 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:33:01,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:01,957 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:01,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-06-27 16:33:02,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2024-06-27 16:33:02,168 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:33:02,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:02,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1983318893, now seen corresponding path program 17 times [2024-06-27 16:33:02,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:02,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616482566] [2024-06-27 16:33:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:02,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:02,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:33:02,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:02,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616482566] [2024-06-27 16:33:02,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616482566] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:02,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157010058] [2024-06-27 16:33:02,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:33:02,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:02,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:02,478 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:33:02,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-06-27 16:33:02,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:33:02,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:02,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:33:02,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:02,790 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-27 16:33:02,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 24 [2024-06-27 16:33:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:33:02,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:02,971 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 16:33:02,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 78 [2024-06-27 16:33:03,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:33:03,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157010058] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:03,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:03,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 28 [2024-06-27 16:33:03,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327154558] [2024-06-27 16:33:03,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:03,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 16:33:03,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:03,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 16:33:03,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2024-06-27 16:33:03,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:33:03,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 496 transitions, 8994 flow. Second operand has 28 states, 28 states have (on average 5.607142857142857) internal successors, (157), 28 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:33:03,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:03,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:33:03,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:05,507 INFO L124 PetriNetUnfolderBase]: 4885/8634 cut-off events. [2024-06-27 16:33:05,507 INFO L125 PetriNetUnfolderBase]: For 136353/136353 co-relation queries the response was YES. [2024-06-27 16:33:05,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57123 conditions, 8634 events. 4885/8634 cut-off events. For 136353/136353 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 61628 event pairs, 1460 based on Foata normal form. 1/8635 useless extension candidates. Maximal degree in co-relation 56963. Up to 5765 conditions per place. [2024-06-27 16:33:05,597 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 441 selfloop transitions, 114 changer transitions 6/562 dead transitions. [2024-06-27 16:33:05,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 562 transitions, 10884 flow [2024-06-27 16:33:05,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 16:33:05,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 16:33:05,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 126 transitions. [2024-06-27 16:33:05,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3 [2024-06-27 16:33:05,599 INFO L175 Difference]: Start difference. First operand has 414 places, 496 transitions, 8994 flow. Second operand 15 states and 126 transitions. [2024-06-27 16:33:05,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 562 transitions, 10884 flow [2024-06-27 16:33:06,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 562 transitions, 10490 flow, removed 63 selfloop flow, removed 18 redundant places. [2024-06-27 16:33:06,258 INFO L231 Difference]: Finished difference. Result has 409 places, 500 transitions, 8965 flow [2024-06-27 16:33:06,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=8610, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8965, PETRI_PLACES=409, PETRI_TRANSITIONS=500} [2024-06-27 16:33:06,259 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 383 predicate places. [2024-06-27 16:33:06,259 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 500 transitions, 8965 flow [2024-06-27 16:33:06,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.607142857142857) internal successors, (157), 28 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:33:06,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:06,260 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:06,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2024-06-27 16:33:06,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2024-06-27 16:33:06,471 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:33:06,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:06,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1377674387, now seen corresponding path program 18 times [2024-06-27 16:33:06,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:06,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162328848] [2024-06-27 16:33:06,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:06,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:33:06,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:06,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162328848] [2024-06-27 16:33:06,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162328848] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:06,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195544848] [2024-06-27 16:33:06,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:33:06,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:06,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:06,770 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:33:06,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-06-27 16:33:06,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 16:33:06,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:06,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 42 conjunts are in the unsatisfiable core [2024-06-27 16:33:06,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:07,090 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:33:07,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2024-06-27 16:33:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:33:07,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:07,430 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-06-27 16:33:07,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 73 [2024-06-27 16:33:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:33:07,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195544848] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:07,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:07,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 27 [2024-06-27 16:33:07,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131860024] [2024-06-27 16:33:07,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:07,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 16:33:07,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:07,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 16:33:07,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2024-06-27 16:33:07,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:33:07,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 500 transitions, 8965 flow. Second operand has 27 states, 27 states have (on average 5.333333333333333) internal successors, (144), 27 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:33:07,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:07,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:33:07,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:11,341 INFO L124 PetriNetUnfolderBase]: 6095/10732 cut-off events. [2024-06-27 16:33:11,341 INFO L125 PetriNetUnfolderBase]: For 156950/156950 co-relation queries the response was YES. [2024-06-27 16:33:11,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68450 conditions, 10732 events. 6095/10732 cut-off events. For 156950/156950 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 78258 event pairs, 992 based on Foata normal form. 7/10739 useless extension candidates. Maximal degree in co-relation 68290. Up to 3483 conditions per place. [2024-06-27 16:33:11,446 INFO L140 encePairwiseOnDemand]: 14/28 looper letters, 538 selfloop transitions, 215 changer transitions 22/776 dead transitions. [2024-06-27 16:33:11,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 776 transitions, 14157 flow [2024-06-27 16:33:11,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 16:33:11,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 16:33:11,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 253 transitions. [2024-06-27 16:33:11,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33465608465608465 [2024-06-27 16:33:11,561 INFO L175 Difference]: Start difference. First operand has 409 places, 500 transitions, 8965 flow. Second operand 27 states and 253 transitions. [2024-06-27 16:33:11,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 776 transitions, 14157 flow [2024-06-27 16:33:12,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 776 transitions, 13929 flow, removed 29 selfloop flow, removed 11 redundant places. [2024-06-27 16:33:12,299 INFO L231 Difference]: Finished difference. Result has 436 places, 543 transitions, 10149 flow [2024-06-27 16:33:12,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=8744, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=10149, PETRI_PLACES=436, PETRI_TRANSITIONS=543} [2024-06-27 16:33:12,300 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 410 predicate places. [2024-06-27 16:33:12,300 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 543 transitions, 10149 flow [2024-06-27 16:33:12,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.333333333333333) internal successors, (144), 27 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:33:12,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:12,300 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:12,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2024-06-27 16:33:12,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:12,511 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:33:12,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:12,512 INFO L85 PathProgramCache]: Analyzing trace with hash 57732158, now seen corresponding path program 3 times [2024-06-27 16:33:12,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:12,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537106524] [2024-06-27 16:33:12,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:12,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:33:12,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:12,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537106524] [2024-06-27 16:33:12,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537106524] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:12,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836078942] [2024-06-27 16:33:12,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:33:12,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:12,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:12,881 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:33:12,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-06-27 16:33:13,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:33:13,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:13,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:33:13,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:13,134 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:33:13,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-06-27 16:33:13,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:33:13,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:13,232 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-06-27 16:33:13,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-06-27 16:33:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:33:13,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836078942] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:13,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:13,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 9] total 24 [2024-06-27 16:33:13,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237147835] [2024-06-27 16:33:13,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:13,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:33:13,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:13,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:33:13,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2024-06-27 16:33:13,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:33:13,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 543 transitions, 10149 flow. Second operand has 24 states, 24 states have (on average 5.333333333333333) internal successors, (128), 24 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:33:13,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:13,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:33:13,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:16,487 INFO L124 PetriNetUnfolderBase]: 6150/10816 cut-off events. [2024-06-27 16:33:16,488 INFO L125 PetriNetUnfolderBase]: For 183264/183264 co-relation queries the response was YES. [2024-06-27 16:33:16,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72344 conditions, 10816 events. 6150/10816 cut-off events. For 183264/183264 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 79714 event pairs, 1372 based on Foata normal form. 14/10830 useless extension candidates. Maximal degree in co-relation 72173. Up to 7558 conditions per place. [2024-06-27 16:33:16,722 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 468 selfloop transitions, 173 changer transitions 1/643 dead transitions. [2024-06-27 16:33:16,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 643 transitions, 12841 flow [2024-06-27 16:33:16,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 16:33:16,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 16:33:16,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 144 transitions. [2024-06-27 16:33:16,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34285714285714286 [2024-06-27 16:33:16,723 INFO L175 Difference]: Start difference. First operand has 436 places, 543 transitions, 10149 flow. Second operand 15 states and 144 transitions. [2024-06-27 16:33:16,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 643 transitions, 12841 flow [2024-06-27 16:33:17,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 643 transitions, 12261 flow, removed 177 selfloop flow, removed 14 redundant places. [2024-06-27 16:33:17,568 INFO L231 Difference]: Finished difference. Result has 435 places, 546 transitions, 10076 flow [2024-06-27 16:33:17,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=9640, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10076, PETRI_PLACES=435, PETRI_TRANSITIONS=546} [2024-06-27 16:33:17,569 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 409 predicate places. [2024-06-27 16:33:17,569 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 546 transitions, 10076 flow [2024-06-27 16:33:17,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.333333333333333) internal successors, (128), 24 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:33:17,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:17,570 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:17,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2024-06-27 16:33:17,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2024-06-27 16:33:17,781 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:33:17,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:17,781 INFO L85 PathProgramCache]: Analyzing trace with hash -527572516, now seen corresponding path program 4 times [2024-06-27 16:33:17,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:17,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810664284] [2024-06-27 16:33:17,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:17,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:33:18,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:18,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810664284] [2024-06-27 16:33:18,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810664284] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:18,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095302905] [2024-06-27 16:33:18,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:33:18,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:18,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:18,159 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:33:18,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-06-27 16:33:18,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:33:18,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:18,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 16:33:18,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:18,448 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:18,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2024-06-27 16:33:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:33:18,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:18,534 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:33:18,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 16:33:18,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:33:18,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095302905] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:18,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:18,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 30 [2024-06-27 16:33:18,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614276278] [2024-06-27 16:33:18,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:18,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:33:18,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:18,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:33:18,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:33:18,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:33:18,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 546 transitions, 10076 flow. Second operand has 30 states, 30 states have (on average 5.133333333333334) internal successors, (154), 30 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:33:18,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:18,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:33:18,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:26,590 INFO L124 PetriNetUnfolderBase]: 13841/24484 cut-off events. [2024-06-27 16:33:26,591 INFO L125 PetriNetUnfolderBase]: For 418967/418967 co-relation queries the response was YES. [2024-06-27 16:33:27,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160435 conditions, 24484 events. 13841/24484 cut-off events. For 418967/418967 co-relation queries the response was YES. Maximal size of possible extension queue 1141. Compared 205056 event pairs, 4988 based on Foata normal form. 92/24576 useless extension candidates. Maximal degree in co-relation 159968. Up to 6004 conditions per place. [2024-06-27 16:33:27,174 INFO L140 encePairwiseOnDemand]: 15/28 looper letters, 1032 selfloop transitions, 507 changer transitions 8/1548 dead transitions. [2024-06-27 16:33:27,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 1548 transitions, 29036 flow [2024-06-27 16:33:27,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-06-27 16:33:27,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2024-06-27 16:33:27,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 640 transitions. [2024-06-27 16:33:27,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686635944700461 [2024-06-27 16:33:27,190 INFO L175 Difference]: Start difference. First operand has 435 places, 546 transitions, 10076 flow. Second operand 62 states and 640 transitions. [2024-06-27 16:33:27,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 1548 transitions, 29036 flow [2024-06-27 16:33:29,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 1548 transitions, 28095 flow, removed 22 selfloop flow, removed 12 redundant places. [2024-06-27 16:33:29,678 INFO L231 Difference]: Finished difference. Result has 507 places, 884 transitions, 18283 flow [2024-06-27 16:33:29,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=9637, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=18283, PETRI_PLACES=507, PETRI_TRANSITIONS=884} [2024-06-27 16:33:29,679 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 481 predicate places. [2024-06-27 16:33:29,679 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 884 transitions, 18283 flow [2024-06-27 16:33:29,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.133333333333334) internal successors, (154), 30 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:33:29,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:29,679 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:29,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-06-27 16:33:29,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2024-06-27 16:33:29,891 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:33:29,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:29,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1171041426, now seen corresponding path program 5 times [2024-06-27 16:33:29,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:29,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922140978] [2024-06-27 16:33:29,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:29,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:33:30,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:30,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922140978] [2024-06-27 16:33:30,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922140978] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:30,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272032977] [2024-06-27 16:33:30,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:33:30,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:30,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:30,210 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:33:30,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-06-27 16:33:30,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 16:33:30,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:30,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:33:30,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:30,524 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-06-27 16:33:30,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2024-06-27 16:33:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:33:30,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:30,641 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-06-27 16:33:30,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-06-27 16:33:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:33:30,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272032977] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:30,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:30,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 29 [2024-06-27 16:33:30,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015544115] [2024-06-27 16:33:30,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:30,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:33:30,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:30,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:33:30,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:33:30,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:33:30,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 884 transitions, 18283 flow. Second operand has 29 states, 29 states have (on average 5.344827586206897) internal successors, (155), 29 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:33:30,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:30,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:33:30,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:41,378 INFO L124 PetriNetUnfolderBase]: 16670/29474 cut-off events. [2024-06-27 16:33:41,378 INFO L125 PetriNetUnfolderBase]: For 659810/659810 co-relation queries the response was YES. [2024-06-27 16:33:41,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205303 conditions, 29474 events. 16670/29474 cut-off events. For 659810/659810 co-relation queries the response was YES. Maximal size of possible extension queue 1288. Compared 254037 event pairs, 6957 based on Foata normal form. 56/29530 useless extension candidates. Maximal degree in co-relation 204823. Up to 8321 conditions per place. [2024-06-27 16:33:41,969 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 1247 selfloop transitions, 424 changer transitions 0/1672 dead transitions. [2024-06-27 16:33:41,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 1672 transitions, 34415 flow [2024-06-27 16:33:41,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 16:33:41,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 16:33:41,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 366 transitions. [2024-06-27 16:33:41,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4216589861751152 [2024-06-27 16:33:41,971 INFO L175 Difference]: Start difference. First operand has 507 places, 884 transitions, 18283 flow. Second operand 31 states and 366 transitions. [2024-06-27 16:33:41,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 1672 transitions, 34415 flow [2024-06-27 16:33:46,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 1672 transitions, 32940 flow, removed 714 selfloop flow, removed 7 redundant places. [2024-06-27 16:33:46,340 INFO L231 Difference]: Finished difference. Result has 544 places, 998 transitions, 20462 flow [2024-06-27 16:33:46,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=17096, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=884, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=20462, PETRI_PLACES=544, PETRI_TRANSITIONS=998} [2024-06-27 16:33:46,341 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 518 predicate places. [2024-06-27 16:33:46,341 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 998 transitions, 20462 flow [2024-06-27 16:33:46,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.344827586206897) internal successors, (155), 29 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:33:46,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:46,341 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:46,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2024-06-27 16:33:46,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:46,552 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:33:46,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:46,552 INFO L85 PathProgramCache]: Analyzing trace with hash -148792946, now seen corresponding path program 3 times [2024-06-27 16:33:46,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:46,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127654409] [2024-06-27 16:33:46,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:46,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:33:46,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:46,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127654409] [2024-06-27 16:33:46,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127654409] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:46,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677981286] [2024-06-27 16:33:46,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:33:46,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:46,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:46,988 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:33:46,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-06-27 16:33:47,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:33:47,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:47,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 66 conjunts are in the unsatisfiable core [2024-06-27 16:33:47,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:47,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 16:33:47,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:33:47,222 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:33:47,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 16:33:47,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 16:33:47,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:33:47,558 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:47,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 26 [2024-06-27 16:33:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:33:47,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:48,280 INFO L349 Elim1Store]: treesize reduction 37, result has 53.8 percent of original size [2024-06-27 16:33:48,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 123 treesize of output 122 [2024-06-27 16:33:48,327 INFO L349 Elim1Store]: treesize reduction 36, result has 53.8 percent of original size [2024-06-27 16:33:48,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 120 treesize of output 119 [2024-06-27 16:33:48,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:33:48,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677981286] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:48,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:48,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 12] total 39 [2024-06-27 16:33:48,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101537472] [2024-06-27 16:33:48,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:48,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-06-27 16:33:48,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:48,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-06-27 16:33:48,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2024-06-27 16:33:48,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-06-27 16:33:48,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 998 transitions, 20462 flow. Second operand has 39 states, 39 states have (on average 4.897435897435898) internal successors, (191), 39 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:33:48,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:48,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-06-27 16:33:48,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand