./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i -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 389f5b7d6579b5ac06564f3c82f3f69fea502868b761df6187d49f96e1a317cd --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:08:55,667 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:08:55,734 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:08:55,739 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:08:55,740 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:08:55,764 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:08:55,765 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:08:55,765 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:08:55,766 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:08:55,769 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:08:55,769 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:08:55,769 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:08:55,770 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:08:55,771 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:08:55,771 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:08:55,771 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:08:55,771 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:08:55,772 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:08:55,772 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:08:55,772 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:08:55,772 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:08:55,773 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:08:55,773 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:08:55,773 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:08:55,773 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:08:55,773 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:08:55,774 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:08:55,774 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:08:55,774 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:08:55,774 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:08:55,775 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:08:55,775 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:08:55,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:08:55,776 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:08:55,776 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:08:55,776 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:08:55,776 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:08:55,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:08:55,777 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:08:55,777 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:08:55,777 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:08:55,777 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:08:55,777 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:08:55,778 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 389f5b7d6579b5ac06564f3c82f3f69fea502868b761df6187d49f96e1a317cd [2024-01-27 15:08:56,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:08:56,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:08:56,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:08:56,058 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:08:56,058 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:08:56,060 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i [2024-01-27 15:08:57,130 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:08:57,284 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:08:57,285 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i [2024-01-27 15:08:57,295 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/777be4bd5/7b0a5a2d0e224014867e43c798639cfc/FLAG6898f0d66 [2024-01-27 15:08:57,305 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/777be4bd5/7b0a5a2d0e224014867e43c798639cfc [2024-01-27 15:08:57,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:08:57,308 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:08:57,308 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:08:57,308 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:08:57,315 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:08:57,315 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:08:57" (1/1) ... [2024-01-27 15:08:57,316 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13cb59bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:57, skipping insertion in model container [2024-01-27 15:08:57,316 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:08:57" (1/1) ... [2024-01-27 15:08:57,352 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:08:57,559 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i[30648,30661] [2024-01-27 15:08:57,566 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:08:57,580 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:08:57,632 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i[30648,30661] [2024-01-27 15:08:57,635 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:08:57,733 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:08:57,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:57 WrapperNode [2024-01-27 15:08:57,734 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:08:57,736 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:08:57,736 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:08:57,736 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:08:57,741 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:57" (1/1) ... [2024-01-27 15:08:57,767 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:57" (1/1) ... [2024-01-27 15:08:57,783 INFO L138 Inliner]: procedures = 163, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2024-01-27 15:08:57,787 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:08:57,788 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:08:57,788 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:08:57,788 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:08:57,795 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:57" (1/1) ... [2024-01-27 15:08:57,795 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:57" (1/1) ... [2024-01-27 15:08:57,798 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:57" (1/1) ... [2024-01-27 15:08:57,808 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 5, 2]. 56 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 2 writes are split as follows [0, 0, 2]. [2024-01-27 15:08:57,808 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:57" (1/1) ... [2024-01-27 15:08:57,808 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:57" (1/1) ... [2024-01-27 15:08:57,811 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:57" (1/1) ... [2024-01-27 15:08:57,820 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:57" (1/1) ... [2024-01-27 15:08:57,822 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:57" (1/1) ... [2024-01-27 15:08:57,829 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:57" (1/1) ... [2024-01-27 15:08:57,831 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:08:57,832 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:08:57,832 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:08:57,832 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:08:57,832 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:57" (1/1) ... [2024-01-27 15:08:57,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:08:57,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:08:57,881 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 15:08:57,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 15:08:57,921 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-01-27 15:08:57,921 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-01-27 15:08:57,921 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-01-27 15:08:57,921 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-01-27 15:08:57,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:08:57,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:08:57,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:08:57,923 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-27 15:08:57,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:08:57,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:08:57,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:08:57,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:08:57,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:08:57,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:08:57,924 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-27 15:08:57,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:08:57,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:08:57,925 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:08:58,061 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:08:58,062 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:08:58,155 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:08:58,155 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:08:58,210 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:08:58,211 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:08:58,211 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:08:58 BoogieIcfgContainer [2024-01-27 15:08:58,211 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:08:58,212 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:08:58,213 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:08:58,215 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:08:58,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:08:57" (1/3) ... [2024-01-27 15:08:58,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@100d9b35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:08:58, skipping insertion in model container [2024-01-27 15:08:58,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:57" (2/3) ... [2024-01-27 15:08:58,216 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@100d9b35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:08:58, skipping insertion in model container [2024-01-27 15:08:58,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:08:58" (3/3) ... [2024-01-27 15:08:58,217 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs-pthread.i [2024-01-27 15:08:58,223 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:08:58,230 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:08:58,230 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:08:58,230 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:08:58,252 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:08:58,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 62 flow [2024-01-27 15:08:58,301 INFO L124 PetriNetUnfolderBase]: 3/28 cut-off events. [2024-01-27 15:08:58,301 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:08:58,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 28 events. 3/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 59 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2024-01-27 15:08:58,303 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 27 transitions, 62 flow [2024-01-27 15:08:58,305 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 26 transitions, 59 flow [2024-01-27 15:08:58,315 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:08:58,322 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;@458c14a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:08:58,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:08:58,331 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:08:58,331 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2024-01-27 15:08:58,332 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:08:58,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:08:58,332 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-01-27 15:08:58,333 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:08:58,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:08:58,337 INFO L85 PathProgramCache]: Analyzing trace with hash 696116038, now seen corresponding path program 1 times [2024-01-27 15:08:58,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:08:58,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125030180] [2024-01-27 15:08:58,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:08:58,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:08:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:08:58,447 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:08:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:08:58,502 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:08:58,504 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:08:58,505 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-01-27 15:08:58,506 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-01-27 15:08:58,507 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-01-27 15:08:58,507 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-01-27 15:08:58,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:08:58,508 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-27 15:08:58,515 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:08:58,516 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-27 15:08:58,544 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:08:58,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 47 transitions, 114 flow [2024-01-27 15:08:58,555 INFO L124 PetriNetUnfolderBase]: 4/39 cut-off events. [2024-01-27 15:08:58,555 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:08:58,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 39 events. 4/39 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 88 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 46. Up to 3 conditions per place. [2024-01-27 15:08:58,566 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 47 transitions, 114 flow [2024-01-27 15:08:58,567 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 34 transitions, 81 flow [2024-01-27 15:08:58,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:08:58,572 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;@458c14a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:08:58,572 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-27 15:08:58,578 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:08:58,579 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2024-01-27 15:08:58,579 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:08:58,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:08:58,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:08:58,579 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:08:58,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:08:58,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1929670610, now seen corresponding path program 1 times [2024-01-27 15:08:58,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:08:58,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525081035] [2024-01-27 15:08:58,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:08:58,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:08:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:08:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:08:58,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:08:58,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525081035] [2024-01-27 15:08:58,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525081035] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:08:58,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:08:58,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:08:58,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056886881] [2024-01-27 15:08:58,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:08:58,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:08:58,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:08:58,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:08:58,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:08:58,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-01-27 15:08:58,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:08:58,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:08:58,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-01-27 15:08:58,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:08:59,078 INFO L124 PetriNetUnfolderBase]: 1203/2092 cut-off events. [2024-01-27 15:08:59,079 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2024-01-27 15:08:59,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3877 conditions, 2092 events. 1203/2092 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12180 event pairs, 303 based on Foata normal form. 637/2623 useless extension candidates. Maximal degree in co-relation 3866. Up to 1003 conditions per place. [2024-01-27 15:08:59,097 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 25 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-01-27 15:08:59,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 41 transitions, 158 flow [2024-01-27 15:08:59,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:08:59,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:08:59,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-01-27 15:08:59,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2024-01-27 15:08:59,108 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 81 flow. Second operand 3 states and 93 transitions. [2024-01-27 15:08:59,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 41 transitions, 158 flow [2024-01-27 15:08:59,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:08:59,114 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 100 flow [2024-01-27 15:08:59,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-01-27 15:08:59,119 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2024-01-27 15:08:59,120 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 100 flow [2024-01-27 15:08:59,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:08:59,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:08:59,120 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-01-27 15:08:59,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:08:59,121 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:08:59,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:08:59,122 INFO L85 PathProgramCache]: Analyzing trace with hash -840457477, now seen corresponding path program 1 times [2024-01-27 15:08:59,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:08:59,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789557210] [2024-01-27 15:08:59,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:08:59,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:08:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:08:59,161 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:08:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:08:59,179 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:08:59,182 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:08:59,183 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-01-27 15:08:59,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-01-27 15:08:59,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2024-01-27 15:08:59,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-01-27 15:08:59,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-01-27 15:08:59,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:08:59,184 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-01-27 15:08:59,184 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:08:59,185 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-27 15:08:59,204 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:08:59,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 67 transitions, 170 flow [2024-01-27 15:08:59,230 INFO L124 PetriNetUnfolderBase]: 5/50 cut-off events. [2024-01-27 15:08:59,230 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-27 15:08:59,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 50 events. 5/50 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 117 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 61. Up to 4 conditions per place. [2024-01-27 15:08:59,231 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 67 transitions, 170 flow [2024-01-27 15:08:59,232 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 42 transitions, 105 flow [2024-01-27 15:08:59,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:08:59,234 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;@458c14a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:08:59,235 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-01-27 15:08:59,237 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:08:59,237 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2024-01-27 15:08:59,237 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:08:59,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:08:59,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:08:59,238 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-01-27 15:08:59,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:08:59,239 INFO L85 PathProgramCache]: Analyzing trace with hash -30622235, now seen corresponding path program 1 times [2024-01-27 15:08:59,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:08:59,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531403054] [2024-01-27 15:08:59,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:08:59,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:08:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:08:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:08:59,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:08:59,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531403054] [2024-01-27 15:08:59,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531403054] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:08:59,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:08:59,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:08:59,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885304460] [2024-01-27 15:08:59,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:08:59,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:08:59,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:08:59,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:08:59,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:08:59,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 67 [2024-01-27 15:08:59,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:08:59,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:08:59,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 67 [2024-01-27 15:08:59,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:09:00,096 INFO L124 PetriNetUnfolderBase]: 6995/10829 cut-off events. [2024-01-27 15:09:00,096 INFO L125 PetriNetUnfolderBase]: For 1042/1042 co-relation queries the response was YES. [2024-01-27 15:09:00,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20460 conditions, 10829 events. 6995/10829 cut-off events. For 1042/1042 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 71206 event pairs, 1712 based on Foata normal form. 3676/13964 useless extension candidates. Maximal degree in co-relation 20448. Up to 5767 conditions per place. [2024-01-27 15:09:00,158 INFO L140 encePairwiseOnDemand]: 55/67 looper letters, 32 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2024-01-27 15:09:00,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 52 transitions, 211 flow [2024-01-27 15:09:00,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:09:00,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:09:00,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2024-01-27 15:09:00,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6318407960199005 [2024-01-27 15:09:00,162 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 105 flow. Second operand 3 states and 127 transitions. [2024-01-27 15:09:00,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 52 transitions, 211 flow [2024-01-27 15:09:00,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 52 transitions, 206 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-01-27 15:09:00,167 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 128 flow [2024-01-27 15:09:00,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-01-27 15:09:00,169 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2024-01-27 15:09:00,169 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 128 flow [2024-01-27 15:09:00,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:00,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:00,170 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:00,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:09:00,170 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-01-27 15:09:00,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:00,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1206549461, now seen corresponding path program 1 times [2024-01-27 15:09:00,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:00,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764293155] [2024-01-27 15:09:00,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:00,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:09:00,242 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:09:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:09:00,265 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:09:00,266 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:09:00,266 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-01-27 15:09:00,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-01-27 15:09:00,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2024-01-27 15:09:00,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-01-27 15:09:00,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-01-27 15:09:00,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-01-27 15:09:00,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:09:00,267 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-01-27 15:09:00,268 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:09:00,268 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-01-27 15:09:00,297 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:09:00,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 87 transitions, 230 flow [2024-01-27 15:09:00,305 INFO L124 PetriNetUnfolderBase]: 6/61 cut-off events. [2024-01-27 15:09:00,305 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-01-27 15:09:00,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 61 events. 6/61 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 145 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 77. Up to 5 conditions per place. [2024-01-27 15:09:00,306 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 87 transitions, 230 flow [2024-01-27 15:09:00,307 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 50 transitions, 131 flow [2024-01-27 15:09:00,308 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:09:00,309 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;@458c14a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:09:00,309 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-01-27 15:09:00,311 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:09:00,311 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2024-01-27 15:09:00,311 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:09:00,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:00,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:00,312 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 15:09:00,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:00,312 INFO L85 PathProgramCache]: Analyzing trace with hash -7155176, now seen corresponding path program 1 times [2024-01-27 15:09:00,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:00,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505641189] [2024-01-27 15:09:00,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:00,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:09:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:09:00,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:09:00,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505641189] [2024-01-27 15:09:00,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505641189] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:09:00,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:09:00,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:09:00,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309836551] [2024-01-27 15:09:00,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:09:00,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:09:00,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:09:00,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:09:00,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:09:00,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 87 [2024-01-27 15:09:00,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:00,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:09:00,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 87 [2024-01-27 15:09:00,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:09:03,755 INFO L124 PetriNetUnfolderBase]: 36336/51943 cut-off events. [2024-01-27 15:09:03,755 INFO L125 PetriNetUnfolderBase]: For 7732/7732 co-relation queries the response was YES. [2024-01-27 15:09:03,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99668 conditions, 51943 events. 36336/51943 cut-off events. For 7732/7732 co-relation queries the response was YES. Maximal size of possible extension queue 2132. Compared 362411 event pairs, 9261 based on Foata normal form. 18923/68409 useless extension candidates. Maximal degree in co-relation 99655. Up to 29392 conditions per place. [2024-01-27 15:09:04,134 INFO L140 encePairwiseOnDemand]: 73/87 looper letters, 39 selfloop transitions, 6 changer transitions 0/63 dead transitions. [2024-01-27 15:09:04,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 63 transitions, 268 flow [2024-01-27 15:09:04,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:09:04,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:09:04,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2024-01-27 15:09:04,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168582375478927 [2024-01-27 15:09:04,136 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 131 flow. Second operand 3 states and 161 transitions. [2024-01-27 15:09:04,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 63 transitions, 268 flow [2024-01-27 15:09:04,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 63 transitions, 255 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-27 15:09:04,140 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 156 flow [2024-01-27 15:09:04,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-01-27 15:09:04,141 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -3 predicate places. [2024-01-27 15:09:04,141 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 156 flow [2024-01-27 15:09:04,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:04,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:04,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:04,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:09:04,142 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 15:09:04,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:04,142 INFO L85 PathProgramCache]: Analyzing trace with hash 559767437, now seen corresponding path program 1 times [2024-01-27 15:09:04,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:04,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023604164] [2024-01-27 15:09:04,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:04,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:09:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:09:04,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:09:04,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023604164] [2024-01-27 15:09:04,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023604164] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:09:04,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:09:04,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:09:04,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632692218] [2024-01-27 15:09:04,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:09:04,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:09:04,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:09:04,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:09:04,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:09:04,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 87 [2024-01-27 15:09:04,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 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) [2024-01-27 15:09:04,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:09:04,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 87 [2024-01-27 15:09:04,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:09:08,042 INFO L124 PetriNetUnfolderBase]: 43697/64263 cut-off events. [2024-01-27 15:09:08,042 INFO L125 PetriNetUnfolderBase]: For 19140/19140 co-relation queries the response was YES. [2024-01-27 15:09:08,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139006 conditions, 64263 events. 43697/64263 cut-off events. For 19140/19140 co-relation queries the response was YES. Maximal size of possible extension queue 2791. Compared 486953 event pairs, 5040 based on Foata normal form. 372/63195 useless extension candidates. Maximal degree in co-relation 138990. Up to 31321 conditions per place. [2024-01-27 15:09:08,490 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 52 selfloop transitions, 14 changer transitions 0/84 dead transitions. [2024-01-27 15:09:08,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 84 transitions, 420 flow [2024-01-27 15:09:08,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:09:08,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:09:08,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 198 transitions. [2024-01-27 15:09:08,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5689655172413793 [2024-01-27 15:09:08,494 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 156 flow. Second operand 4 states and 198 transitions. [2024-01-27 15:09:08,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 84 transitions, 420 flow [2024-01-27 15:09:08,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 84 transitions, 398 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:09:08,521 INFO L231 Difference]: Finished difference. Result has 56 places, 57 transitions, 243 flow [2024-01-27 15:09:08,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=243, PETRI_PLACES=56, PETRI_TRANSITIONS=57} [2024-01-27 15:09:08,522 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2024-01-27 15:09:08,523 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 57 transitions, 243 flow [2024-01-27 15:09:08,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 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) [2024-01-27 15:09:08,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:08,523 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:08,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:09:08,523 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 15:09:08,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:08,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1704109330, now seen corresponding path program 1 times [2024-01-27 15:09:08,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:08,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689590035] [2024-01-27 15:09:08,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:08,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:09:08,541 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 15:09:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 15:09:08,560 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 15:09:08,560 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 15:09:08,561 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-01-27 15:09:08,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2024-01-27 15:09:08,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2024-01-27 15:09:08,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-01-27 15:09:08,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-01-27 15:09:08,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-01-27 15:09:08,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-01-27 15:09:08,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-27 15:09:08,562 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-01-27 15:09:08,562 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 15:09:08,562 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-01-27 15:09:08,585 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:09:08,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 107 transitions, 294 flow [2024-01-27 15:09:08,593 INFO L124 PetriNetUnfolderBase]: 7/72 cut-off events. [2024-01-27 15:09:08,594 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-01-27 15:09:08,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 72 events. 7/72 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 172 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 94. Up to 6 conditions per place. [2024-01-27 15:09:08,594 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 107 transitions, 294 flow [2024-01-27 15:09:08,595 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 58 transitions, 159 flow [2024-01-27 15:09:08,595 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:09:08,596 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;@458c14a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:09:08,596 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-01-27 15:09:08,598 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:09:08,598 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2024-01-27 15:09:08,598 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:09:08,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:08,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:08,599 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-01-27 15:09:08,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:08,599 INFO L85 PathProgramCache]: Analyzing trace with hash 698399723, now seen corresponding path program 1 times [2024-01-27 15:09:08,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:08,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031999421] [2024-01-27 15:09:08,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:08,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:09:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:09:08,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:09:08,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031999421] [2024-01-27 15:09:08,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031999421] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:09:08,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:09:08,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:09:08,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399699186] [2024-01-27 15:09:08,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:09:08,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:09:08,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:09:08,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:09:08,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:09:08,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 107 [2024-01-27 15:09:08,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:08,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:09:08,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 107 [2024-01-27 15:09:08,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:09:23,970 INFO L124 PetriNetUnfolderBase]: 178118/240990 cut-off events. [2024-01-27 15:09:23,970 INFO L125 PetriNetUnfolderBase]: For 49465/49465 co-relation queries the response was YES. [2024-01-27 15:09:24,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467509 conditions, 240990 events. 178118/240990 cut-off events. For 49465/49465 co-relation queries the response was YES. Maximal size of possible extension queue 8148. Compared 1747533 event pairs, 48026 based on Foata normal form. 92130/322535 useless extension candidates. Maximal degree in co-relation 467495. Up to 141658 conditions per place. [2024-01-27 15:09:26,160 INFO L140 encePairwiseOnDemand]: 91/107 looper letters, 46 selfloop transitions, 7 changer transitions 0/74 dead transitions. [2024-01-27 15:09:26,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 74 transitions, 329 flow [2024-01-27 15:09:26,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:09:26,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:09:26,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 195 transitions. [2024-01-27 15:09:26,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6074766355140186 [2024-01-27 15:09:26,161 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 159 flow. Second operand 3 states and 195 transitions. [2024-01-27 15:09:26,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 74 transitions, 329 flow [2024-01-27 15:09:26,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 74 transitions, 304 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-01-27 15:09:26,179 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 184 flow [2024-01-27 15:09:26,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-01-27 15:09:26,180 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -4 predicate places. [2024-01-27 15:09:26,180 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 184 flow [2024-01-27 15:09:26,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:26,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:09:26,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:09:26,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-27 15:09:26,181 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-01-27 15:09:26,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:09:26,182 INFO L85 PathProgramCache]: Analyzing trace with hash -163880693, now seen corresponding path program 1 times [2024-01-27 15:09:26,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:09:26,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269479195] [2024-01-27 15:09:26,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:09:26,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:09:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:09:26,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:09:26,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:09:26,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269479195] [2024-01-27 15:09:26,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269479195] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:09:26,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:09:26,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:09:26,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967236451] [2024-01-27 15:09:26,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:09:26,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:09:26,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:09:26,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:09:26,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:09:26,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 107 [2024-01-27 15:09:26,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:09:26,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:09:26,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 107 [2024-01-27 15:09:26,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand