./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 448d4d75 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.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 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-448d4d7-m [2024-02-20 12:53:55,456 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-20 12:53:55,592 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-20 12:53:55,613 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-20 12:53:55,614 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-20 12:53:55,655 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-20 12:53:55,656 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-20 12:53:55,656 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-20 12:53:55,657 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-20 12:53:55,660 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-20 12:53:55,661 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-20 12:53:55,661 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-20 12:53:55,662 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-20 12:53:55,663 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-20 12:53:55,663 INFO L153 SettingsManager]: * Use SBE=true [2024-02-20 12:53:55,664 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-20 12:53:55,664 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-20 12:53:55,664 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-20 12:53:55,665 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-20 12:53:55,665 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-20 12:53:55,665 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-20 12:53:55,665 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-20 12:53:55,666 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-20 12:53:55,666 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-20 12:53:55,666 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-20 12:53:55,667 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-20 12:53:55,667 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-20 12:53:55,667 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-20 12:53:55,668 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-20 12:53:55,668 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-20 12:53:55,669 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-20 12:53:55,669 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-20 12:53:55,669 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 12:53:55,669 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-20 12:53:55,670 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-20 12:53:55,670 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-20 12:53:55,670 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-20 12:53:55,670 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-20 12:53:55,671 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-20 12:53:55,671 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-20 12:53:55,671 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-20 12:53:55,671 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-20 12:53:55,672 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-20 12:53:55,672 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-20 12:53:56,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-20 12:53:56,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-20 12:53:56,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-20 12:53:56,148 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-20 12:53:56,149 INFO L274 PluginConnector]: CDTParser initialized [2024-02-20 12:53:56,150 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2024-02-20 12:53:57,888 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-20 12:53:58,391 INFO L384 CDTParser]: Found 1 translation units. [2024-02-20 12:53:58,394 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2024-02-20 12:53:58,423 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d866090d5/e03f6f60e34247aca0a973c1a74f65f9/FLAG5876ef49c [2024-02-20 12:53:58,448 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d866090d5/e03f6f60e34247aca0a973c1a74f65f9 [2024-02-20 12:53:58,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-20 12:53:58,454 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-20 12:53:58,472 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-20 12:53:58,472 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-20 12:53:58,477 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-20 12:53:58,477 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 12:53:58" (1/1) ... [2024-02-20 12:53:58,478 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ad6d13f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:53:58, skipping insertion in model container [2024-02-20 12:53:58,478 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 12:53:58" (1/1) ... [2024-02-20 12:53:58,572 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-20 12:53:59,140 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-deagle/circular_buffer_ok.i[30451,30464] [2024-02-20 12:53:59,148 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-deagle/circular_buffer_ok.i[30681,30694] [2024-02-20 12:53:59,159 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-deagle/circular_buffer_ok.i[30979,30992] [2024-02-20 12:53:59,176 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 12:53:59,208 INFO L202 MainTranslator]: Completed pre-run [2024-02-20 12:53:59,270 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-deagle/circular_buffer_ok.i[30451,30464] [2024-02-20 12:53:59,286 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-deagle/circular_buffer_ok.i[30681,30694] [2024-02-20 12:53:59,287 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-deagle/circular_buffer_ok.i[30979,30992] [2024-02-20 12:53:59,291 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 12:53:59,355 INFO L206 MainTranslator]: Completed translation [2024-02-20 12:53:59,356 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:53:59 WrapperNode [2024-02-20 12:53:59,356 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-20 12:53:59,357 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-20 12:53:59,357 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-20 12:53:59,357 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-20 12:53:59,363 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:53:59" (1/1) ... [2024-02-20 12:53:59,403 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:53:59" (1/1) ... [2024-02-20 12:53:59,440 INFO L138 Inliner]: procedures = 169, calls = 38, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 148 [2024-02-20 12:53:59,443 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-20 12:53:59,444 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-20 12:53:59,449 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-20 12:53:59,450 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-20 12:53:59,460 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:53:59" (1/1) ... [2024-02-20 12:53:59,470 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:53:59" (1/1) ... [2024-02-20 12:53:59,475 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:53:59" (1/1) ... [2024-02-20 12:53:59,513 INFO L175 MemorySlicer]: Split 18 memory accesses to 6 slices as follows [2, 1, 3, 8, 2, 2]. 44 percent of accesses are in the largest equivalence class. The 11 initializations are split as follows [2, 1, 0, 8, 0, 0]. The 4 writes are split as follows [0, 0, 2, 0, 1, 1]. [2024-02-20 12:53:59,527 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:53:59" (1/1) ... [2024-02-20 12:53:59,535 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:53:59" (1/1) ... [2024-02-20 12:53:59,543 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:53:59" (1/1) ... [2024-02-20 12:53:59,561 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:53:59" (1/1) ... [2024-02-20 12:53:59,585 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:53:59" (1/1) ... [2024-02-20 12:53:59,587 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:53:59" (1/1) ... [2024-02-20 12:53:59,599 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-20 12:53:59,608 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-20 12:53:59,609 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-20 12:53:59,609 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-20 12:53:59,610 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:53:59" (1/1) ... [2024-02-20 12:53:59,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 12:53:59,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:53:59,679 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-20 12:53:59,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-20 12:53:59,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-20 12:53:59,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-20 12:53:59,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-20 12:53:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-20 12:53:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-20 12:53:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-02-20 12:53:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-02-20 12:53:59,777 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-02-20 12:53:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-02-20 12:53:59,778 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-02-20 12:53:59,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-20 12:53:59,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-20 12:53:59,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-20 12:53:59,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-20 12:53:59,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-20 12:53:59,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-02-20 12:53:59,780 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-20 12:53:59,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-20 12:53:59,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-20 12:53:59,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-20 12:53:59,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-02-20 12:53:59,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-02-20 12:53:59,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-02-20 12:53:59,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-02-20 12:53:59,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-02-20 12:53:59,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2024-02-20 12:53:59,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-20 12:53:59,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-20 12:53:59,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-20 12:53:59,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-20 12:53:59,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-20 12:53:59,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-02-20 12:53:59,784 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-20 12:53:59,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-20 12:53:59,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-20 12:53:59,793 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-20 12:54:00,095 INFO L244 CfgBuilder]: Building ICFG [2024-02-20 12:54:00,097 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-20 12:54:00,460 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-20 12:54:00,461 INFO L293 CfgBuilder]: Performing block encoding [2024-02-20 12:54:00,661 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-20 12:54:00,662 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-20 12:54:00,662 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 12:54:00 BoogieIcfgContainer [2024-02-20 12:54:00,662 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-20 12:54:00,664 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-20 12:54:00,664 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-20 12:54:00,667 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-20 12:54:00,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 12:53:58" (1/3) ... [2024-02-20 12:54:00,668 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59df1c49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 12:54:00, skipping insertion in model container [2024-02-20 12:54:00,668 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 12:53:59" (2/3) ... [2024-02-20 12:54:00,670 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59df1c49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 12:54:00, skipping insertion in model container [2024-02-20 12:54:00,670 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 12:54:00" (3/3) ... [2024-02-20 12:54:00,671 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_ok.i [2024-02-20 12:54:00,715 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-20 12:54:00,716 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-02-20 12:54:00,716 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-20 12:54:00,761 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-20 12:54:00,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 47 transitions, 108 flow [2024-02-20 12:54:00,833 INFO L124 PetriNetUnfolderBase]: 8/45 cut-off events. [2024-02-20 12:54:00,833 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 12:54:00,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 45 events. 8/45 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 109 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2024-02-20 12:54:00,838 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 47 transitions, 108 flow [2024-02-20 12:54:00,841 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 43 transitions, 95 flow [2024-02-20 12:54:00,855 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 12:54:00,864 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@515cde14, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 12:54:00,865 INFO L370 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-02-20 12:54:00,879 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 12:54:00,879 INFO L124 PetriNetUnfolderBase]: 8/40 cut-off events. [2024-02-20 12:54:00,879 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-20 12:54:00,880 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:54:00,881 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:54:00,881 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-02-20 12:54:00,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:54:00,900 INFO L85 PathProgramCache]: Analyzing trace with hash -54902984, now seen corresponding path program 1 times [2024-02-20 12:54:00,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:54:00,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858971373] [2024-02-20 12:54:00,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:54:00,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:54:01,277 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-02-20 12:54:01,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029777905] [2024-02-20 12:54:01,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:54:01,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:54:01,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:54:01,320 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:54:01,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-20 12:54:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:54:01,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-20 12:54:01,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:54:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:54:01,703 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-20 12:54:01,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:54:01,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858971373] [2024-02-20 12:54:01,704 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-02-20 12:54:01,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029777905] [2024-02-20 12:54:01,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029777905] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:54:01,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:54:01,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 12:54:01,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538106250] [2024-02-20 12:54:01,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:54:01,716 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 12:54:01,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:54:01,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 12:54:01,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 12:54:01,758 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-20 12:54:01,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 43 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:54:01,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:54:01,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-20 12:54:01,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:54:02,093 INFO L124 PetriNetUnfolderBase]: 411/738 cut-off events. [2024-02-20 12:54:02,106 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-02-20 12:54:02,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1423 conditions, 738 events. 411/738 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3597 event pairs, 306 based on Foata normal form. 66/711 useless extension candidates. Maximal degree in co-relation 1326. Up to 648 conditions per place. [2024-02-20 12:54:02,114 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 27 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2024-02-20 12:54:02,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 141 flow [2024-02-20 12:54:02,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 12:54:02,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 12:54:02,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-02-20 12:54:02,138 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.49645390070921985 [2024-02-20 12:54:02,141 INFO L308 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-02-20 12:54:02,156 INFO L507 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 141 flow [2024-02-20 12:54:02,157 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:54:02,157 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:54:02,158 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:54:02,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-20 12:54:02,371 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-02-20 12:54:02,371 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-02-20 12:54:02,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:54:02,372 INFO L85 PathProgramCache]: Analyzing trace with hash -9242595, now seen corresponding path program 1 times [2024-02-20 12:54:02,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:54:02,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061067101] [2024-02-20 12:54:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:54:02,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:54:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:54:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:54:02,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:54:02,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061067101] [2024-02-20 12:54:02,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061067101] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:54:02,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:54:02,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-20 12:54:02,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765202617] [2024-02-20 12:54:02,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:54:02,959 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 12:54:02,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:54:02,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 12:54:02,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 12:54:02,963 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-02-20 12:54:02,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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) [2024-02-20 12:54:02,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:54:02,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-02-20 12:54:02,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:54:03,309 INFO L124 PetriNetUnfolderBase]: 651/1197 cut-off events. [2024-02-20 12:54:03,310 INFO L125 PetriNetUnfolderBase]: For 130/214 co-relation queries the response was YES. [2024-02-20 12:54:03,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3289 conditions, 1197 events. 651/1197 cut-off events. For 130/214 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5503 event pairs, 233 based on Foata normal form. 20/1104 useless extension candidates. Maximal degree in co-relation 3074. Up to 1013 conditions per place. [2024-02-20 12:54:03,339 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 43 selfloop transitions, 3 changer transitions 3/59 dead transitions. [2024-02-20 12:54:03,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 59 transitions, 329 flow [2024-02-20 12:54:03,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 12:54:03,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 12:54:03,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-02-20 12:54:03,342 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6524822695035462 [2024-02-20 12:54:03,343 INFO L308 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-02-20 12:54:03,343 INFO L507 AbstractCegarLoop]: Abstraction has has 44 places, 59 transitions, 329 flow [2024-02-20 12:54:03,343 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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) [2024-02-20 12:54:03,343 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:54:03,344 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:54:03,344 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-20 12:54:03,344 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-02-20 12:54:03,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:54:03,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1702023884, now seen corresponding path program 1 times [2024-02-20 12:54:03,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:54:03,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916768684] [2024-02-20 12:54:03,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:54:03,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:54:03,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:54:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:54:03,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:54:03,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916768684] [2024-02-20 12:54:03,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916768684] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:54:03,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:54:03,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-20 12:54:03,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971308263] [2024-02-20 12:54:03,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:54:03,614 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 12:54:03,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:54:03,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 12:54:03,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 12:54:03,619 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-20 12:54:03,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 59 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:54:03,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:54:03,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-20 12:54:03,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:54:03,900 INFO L124 PetriNetUnfolderBase]: 707/1327 cut-off events. [2024-02-20 12:54:03,912 INFO L125 PetriNetUnfolderBase]: For 333/441 co-relation queries the response was YES. [2024-02-20 12:54:03,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4732 conditions, 1327 events. 707/1327 cut-off events. For 333/441 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6362 event pairs, 153 based on Foata normal form. 0/1220 useless extension candidates. Maximal degree in co-relation 4386. Up to 1112 conditions per place. [2024-02-20 12:54:03,945 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 58 selfloop transitions, 2 changer transitions 5/75 dead transitions. [2024-02-20 12:54:03,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 75 transitions, 561 flow [2024-02-20 12:54:03,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 12:54:03,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 12:54:03,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-02-20 12:54:03,963 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-02-20 12:54:03,964 INFO L308 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-02-20 12:54:03,965 INFO L507 AbstractCegarLoop]: Abstraction has has 46 places, 75 transitions, 561 flow [2024-02-20 12:54:03,965 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:54:03,965 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:54:03,966 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:54:03,967 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-20 12:54:03,967 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-02-20 12:54:03,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:54:03,968 INFO L85 PathProgramCache]: Analyzing trace with hash 767173551, now seen corresponding path program 1 times [2024-02-20 12:54:03,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:54:03,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275164856] [2024-02-20 12:54:03,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:54:03,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:54:03,993 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-02-20 12:54:03,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297843468] [2024-02-20 12:54:03,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:54:03,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:54:03,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:54:04,009 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:54:04,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-20 12:54:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:54:04,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-20 12:54:04,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:54:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:54:04,235 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-20 12:54:04,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:54:04,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275164856] [2024-02-20 12:54:04,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-02-20 12:54:04,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297843468] [2024-02-20 12:54:04,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297843468] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:54:04,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:54:04,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-20 12:54:04,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882641365] [2024-02-20 12:54:04,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:54:04,237 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 12:54:04,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:54:04,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 12:54:04,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-20 12:54:04,248 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-20 12:54:04,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 75 transitions, 561 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:54:04,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:54:04,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-20 12:54:04,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:54:04,771 INFO L124 PetriNetUnfolderBase]: 922/1679 cut-off events. [2024-02-20 12:54:04,772 INFO L125 PetriNetUnfolderBase]: For 1100/1230 co-relation queries the response was YES. [2024-02-20 12:54:04,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7579 conditions, 1679 events. 922/1679 cut-off events. For 1100/1230 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 8312 event pairs, 84 based on Foata normal form. 0/1572 useless extension candidates. Maximal degree in co-relation 7155. Up to 1447 conditions per place. [2024-02-20 12:54:04,798 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 144 selfloop transitions, 12 changer transitions 5/170 dead transitions. [2024-02-20 12:54:04,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 170 transitions, 1667 flow [2024-02-20 12:54:04,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-20 12:54:04,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-20 12:54:04,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-02-20 12:54:04,803 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5709219858156028 [2024-02-20 12:54:04,805 INFO L308 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-02-20 12:54:04,805 INFO L507 AbstractCegarLoop]: Abstraction has has 51 places, 170 transitions, 1667 flow [2024-02-20 12:54:04,813 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:54:04,814 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:54:04,814 INFO L234 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] [2024-02-20 12:54:04,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-20 12:54:05,028 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-02-20 12:54:05,029 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-02-20 12:54:05,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:54:05,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1504246513, now seen corresponding path program 1 times [2024-02-20 12:54:05,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:54:05,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523381491] [2024-02-20 12:54:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:54:05,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:54:05,064 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-02-20 12:54:05,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562820328] [2024-02-20 12:54:05,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:54:05,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:54:05,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:54:05,067 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:54:05,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-20 12:54:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:54:05,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-20 12:54:05,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:54:05,318 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 11 treesize of output 7 [2024-02-20 12:54:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:54:05,344 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-20 12:54:05,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:54:05,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523381491] [2024-02-20 12:54:05,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-02-20 12:54:05,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562820328] [2024-02-20 12:54:05,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562820328] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:54:05,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:54:05,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 12:54:05,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195845020] [2024-02-20 12:54:05,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:54:05,346 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 12:54:05,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:54:05,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 12:54:05,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 12:54:05,347 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-02-20 12:54:05,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 170 transitions, 1667 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:54:05,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:54:05,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-02-20 12:54:05,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:54:05,617 INFO L124 PetriNetUnfolderBase]: 553/1136 cut-off events. [2024-02-20 12:54:05,617 INFO L125 PetriNetUnfolderBase]: For 1626/1634 co-relation queries the response was YES. [2024-02-20 12:54:05,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5864 conditions, 1136 events. 553/1136 cut-off events. For 1626/1634 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 5171 event pairs, 49 based on Foata normal form. 60/1153 useless extension candidates. Maximal degree in co-relation 5376. Up to 926 conditions per place. [2024-02-20 12:54:05,627 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 144 selfloop transitions, 17 changer transitions 11/182 dead transitions. [2024-02-20 12:54:05,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 182 transitions, 2149 flow [2024-02-20 12:54:05,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 12:54:05,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 12:54:05,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-02-20 12:54:05,641 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5886524822695035 [2024-02-20 12:54:05,642 INFO L308 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-02-20 12:54:05,642 INFO L507 AbstractCegarLoop]: Abstraction has has 53 places, 182 transitions, 2149 flow [2024-02-20 12:54:05,642 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:54:05,642 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:54:05,643 INFO L234 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] [2024-02-20 12:54:05,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-20 12:54:05,857 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:54:05,857 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-02-20 12:54:05,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:54:05,858 INFO L85 PathProgramCache]: Analyzing trace with hash -953734981, now seen corresponding path program 1 times [2024-02-20 12:54:05,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:54:05,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650270608] [2024-02-20 12:54:05,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:54:05,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:54:05,883 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-02-20 12:54:05,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030607112] [2024-02-20 12:54:05,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:54:05,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:54:05,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:54:05,897 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:54:05,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-20 12:54:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:54:06,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 12:54:06,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:54:06,244 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 7 treesize of output 6 [2024-02-20 12:54:06,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-02-20 12:54:06,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-02-20 12:54:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:54:06,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-20 12:54:06,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:54:06,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650270608] [2024-02-20 12:54:06,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-02-20 12:54:06,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030607112] [2024-02-20 12:54:06,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030607112] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:54:06,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:54:06,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-20 12:54:06,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968286961] [2024-02-20 12:54:06,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:54:06,691 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-20 12:54:06,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:54:06,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-20 12:54:06,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-02-20 12:54:06,719 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-20 12:54:06,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 182 transitions, 2149 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:54:06,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:54:06,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-20 12:54:06,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:54:07,694 INFO L124 PetriNetUnfolderBase]: 811/1658 cut-off events. [2024-02-20 12:54:07,695 INFO L125 PetriNetUnfolderBase]: For 3805/3885 co-relation queries the response was YES. [2024-02-20 12:54:07,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9939 conditions, 1658 events. 811/1658 cut-off events. For 3805/3885 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 8498 event pairs, 43 based on Foata normal form. 12/1624 useless extension candidates. Maximal degree in co-relation 9188. Up to 1356 conditions per place. [2024-02-20 12:54:07,710 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 249 selfloop transitions, 16 changer transitions 20/295 dead transitions. [2024-02-20 12:54:07,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 295 transitions, 4120 flow [2024-02-20 12:54:07,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-20 12:54:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-20 12:54:07,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-02-20 12:54:07,712 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5342789598108747 [2024-02-20 12:54:07,714 INFO L308 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-02-20 12:54:07,714 INFO L507 AbstractCegarLoop]: Abstraction has has 61 places, 295 transitions, 4120 flow [2024-02-20 12:54:07,715 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:54:07,715 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:54:07,715 INFO L234 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, 1, 1] [2024-02-20 12:54:07,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-20 12:54:07,932 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:54:07,932 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-02-20 12:54:07,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:54:07,933 INFO L85 PathProgramCache]: Analyzing trace with hash 650063765, now seen corresponding path program 1 times [2024-02-20 12:54:07,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:54:07,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363822305] [2024-02-20 12:54:07,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:54:07,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:54:07,967 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-02-20 12:54:07,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894374781] [2024-02-20 12:54:07,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:54:07,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:54:07,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:54:07,978 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:54:08,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-20 12:54:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:54:08,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 2 conjunts are in the unsatisfiable core [2024-02-20 12:54:08,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:54:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:54:08,207 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-20 12:54:08,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:54:08,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363822305] [2024-02-20 12:54:08,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-02-20 12:54:08,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894374781] [2024-02-20 12:54:08,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894374781] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:54:08,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:54:08,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 12:54:08,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285245139] [2024-02-20 12:54:08,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:54:08,209 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 12:54:08,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:54:08,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 12:54:08,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 12:54:08,211 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-02-20 12:54:08,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 295 transitions, 4120 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:54:08,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:54:08,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-02-20 12:54:08,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:54:08,664 INFO L124 PetriNetUnfolderBase]: 686/1416 cut-off events. [2024-02-20 12:54:08,677 INFO L125 PetriNetUnfolderBase]: For 5389/5449 co-relation queries the response was YES. [2024-02-20 12:54:08,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9438 conditions, 1416 events. 686/1416 cut-off events. For 5389/5449 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 6442 event pairs, 15 based on Foata normal form. 32/1423 useless extension candidates. Maximal degree in co-relation 8680. Up to 1125 conditions per place. [2024-02-20 12:54:08,689 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 161 selfloop transitions, 5 changer transitions 93/268 dead transitions. [2024-02-20 12:54:08,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 268 transitions, 4224 flow [2024-02-20 12:54:08,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 12:54:08,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 12:54:08,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-02-20 12:54:08,705 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5886524822695035 [2024-02-20 12:54:08,706 INFO L308 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-02-20 12:54:08,706 INFO L507 AbstractCegarLoop]: Abstraction has has 63 places, 268 transitions, 4224 flow [2024-02-20 12:54:08,706 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:54:08,706 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:54:08,707 INFO L234 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, 1, 1, 1, 1, 1] [2024-02-20 12:54:08,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-20 12:54:08,922 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:54:08,922 INFO L432 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-02-20 12:54:08,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:54:08,923 INFO L85 PathProgramCache]: Analyzing trace with hash 120280942, now seen corresponding path program 1 times [2024-02-20 12:54:08,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:54:08,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116685471] [2024-02-20 12:54:08,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:54:08,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:54:08,939 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-02-20 12:54:08,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971315516] [2024-02-20 12:54:08,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:54:08,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:54:08,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:54:08,958 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:54:08,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-20 12:54:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:54:09,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-20 12:54:09,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:54:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:54:09,242 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-20 12:54:09,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:54:09,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116685471] [2024-02-20 12:54:09,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-02-20 12:54:09,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971315516] [2024-02-20 12:54:09,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971315516] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 12:54:09,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 12:54:09,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-20 12:54:09,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557494597] [2024-02-20 12:54:09,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 12:54:09,244 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 12:54:09,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:54:09,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 12:54:09,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-20 12:54:09,249 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-02-20 12:54:09,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 268 transitions, 4224 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:54:09,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:54:09,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-02-20 12:54:09,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 12:54:09,432 INFO L124 PetriNetUnfolderBase]: 671/1368 cut-off events. [2024-02-20 12:54:09,432 INFO L125 PetriNetUnfolderBase]: For 7230/7302 co-relation queries the response was YES. [2024-02-20 12:54:09,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10222 conditions, 1368 events. 671/1368 cut-off events. For 7230/7302 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 5927 event pairs, 3 based on Foata normal form. 0/1358 useless extension candidates. Maximal degree in co-relation 9357. Up to 1102 conditions per place. [2024-02-20 12:54:09,451 INFO L140 encePairwiseOnDemand]: 45/47 looper letters, 156 selfloop transitions, 1 changer transitions 97/262 dead transitions. [2024-02-20 12:54:09,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 262 transitions, 4648 flow [2024-02-20 12:54:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 12:54:09,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 12:54:09,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-02-20 12:54:09,453 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.45390070921985815 [2024-02-20 12:54:09,455 INFO L308 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-02-20 12:54:09,455 INFO L507 AbstractCegarLoop]: Abstraction has has 63 places, 262 transitions, 4648 flow [2024-02-20 12:54:09,456 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:54:09,456 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 12:54:09,456 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 12:54:09,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-20 12:54:09,671 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:54:09,671 INFO L432 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-02-20 12:54:09,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 12:54:09,672 INFO L85 PathProgramCache]: Analyzing trace with hash -180786153, now seen corresponding path program 1 times [2024-02-20 12:54:09,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 12:54:09,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054699234] [2024-02-20 12:54:09,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:54:09,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 12:54:09,693 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-02-20 12:54:09,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495866472] [2024-02-20 12:54:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 12:54:09,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 12:54:09,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 12:54:09,710 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 12:54:09,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-20 12:54:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 12:54:10,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 56 conjunts are in the unsatisfiable core [2024-02-20 12:54:10,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 12:54:10,237 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 7 treesize of output 6 [2024-02-20 12:54:10,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-02-20 12:54:11,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2024-02-20 12:54:11,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-02-20 12:54:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:54:11,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 12:55:34,138 WARN L293 SmtUtils]: Spent 21.17s on a formula simplification that was a NOOP. DAG size: 260 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-20 12:56:43,984 WARN L293 SmtUtils]: Spent 47.85s on a formula simplification. DAG size of input: 232 DAG size of output: 232 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-20 12:58:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 12:58:00,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 12:58:00,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054699234] [2024-02-20 12:58:00,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-02-20 12:58:00,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495866472] [2024-02-20 12:58:00,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495866472] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 12:58:00,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-02-20 12:58:00,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2024-02-20 12:58:00,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568112235] [2024-02-20 12:58:00,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-02-20 12:58:00,586 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-02-20 12:58:00,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 12:58:00,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-02-20 12:58:00,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2024-02-20 12:58:03,540 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-02-20 12:58:03,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 262 transitions, 4648 flow. Second operand has 27 states, 27 states have (on average 12.518518518518519) internal successors, (338), 27 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 12:58:03,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 12:58:03,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-02-20 12:58:03,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 13:01:45,498 WARN L293 SmtUtils]: Spent 3.65m on a formula simplification. DAG size of input: 526 DAG size of output: 346 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-20 13:03:20,241 WARN L293 SmtUtils]: Spent 1.57m on a formula simplification. DAG size of input: 563 DAG size of output: 213 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-20 13:03:28,666 WARN L293 SmtUtils]: Spent 5.61s on a formula simplification that was a NOOP. DAG size: 170 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-20 13:06:17,186 WARN L293 SmtUtils]: Spent 2.74m on a formula simplification. DAG size of input: 524 DAG size of output: 344 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-20 13:08:03,941 WARN L293 SmtUtils]: Spent 1.69m on a formula simplification. DAG size of input: 363 DAG size of output: 307 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-20 13:08:22,484 WARN L293 SmtUtils]: Spent 9.87s on a formula simplification. DAG size of input: 177 DAG size of output: 171 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15