./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-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 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 16:01:09,690 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 16:01:09,746 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 16:01:09,750 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 16:01:09,751 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 16:01:09,769 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 16:01:09,770 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 16:01:09,770 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 16:01:09,770 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 16:01:09,771 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 16:01:09,771 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 16:01:09,772 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 16:01:09,772 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 16:01:09,773 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 16:01:09,773 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 16:01:09,773 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 16:01:09,774 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 16:01:09,774 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 16:01:09,775 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 16:01:09,775 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 16:01:09,775 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 16:01:09,781 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 16:01:09,781 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 16:01:09,781 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 16:01:09,786 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 16:01:09,786 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 16:01:09,787 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 16:01:09,787 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 16:01:09,787 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 16:01:09,788 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 16:01:09,788 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 16:01:09,788 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 16:01:09,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 16:01:09,789 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 16:01:09,789 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 16:01:09,789 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 16:01:09,790 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 16:01:09,790 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 16:01:09,791 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 16:01:09,791 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 16:01:09,791 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 16:01:09,793 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 16:01:09,793 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 16:01:09,793 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 [2024-01-27 16:01:10,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 16:01:10,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 16:01:10,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 16:01:10,061 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 16:01:10,062 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 16:01:10,063 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2024-01-27 16:01:11,257 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 16:01:11,455 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 16:01:11,456 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2024-01-27 16:01:11,469 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ff26e70c/e463688e9ec84a78914b8c978e903a07/FLAG2c3e30677 [2024-01-27 16:01:11,481 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ff26e70c/e463688e9ec84a78914b8c978e903a07 [2024-01-27 16:01:11,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 16:01:11,484 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 16:01:11,485 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 16:01:11,486 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 16:01:11,491 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 16:01:11,492 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 04:01:11" (1/1) ... [2024-01-27 16:01:11,493 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c155d5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:01:11, skipping insertion in model container [2024-01-27 16:01:11,493 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 04:01:11" (1/1) ... [2024-01-27 16:01:11,551 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 16:01:11,960 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] [2024-01-27 16:01:11,970 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] [2024-01-27 16:01:11,976 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] [2024-01-27 16:01:11,986 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 16:01:11,999 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 16:01:12,039 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] [2024-01-27 16:01:12,043 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] [2024-01-27 16:01:12,050 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] [2024-01-27 16:01:12,058 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 16:01:12,097 INFO L206 MainTranslator]: Completed translation [2024-01-27 16:01:12,097 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:01:12 WrapperNode [2024-01-27 16:01:12,098 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 16:01:12,100 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 16:01:12,100 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 16:01:12,100 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 16:01:12,106 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:01:12" (1/1) ... [2024-01-27 16:01:12,119 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:01:12" (1/1) ... [2024-01-27 16:01:12,141 INFO L138 Inliner]: procedures = 169, calls = 38, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 148 [2024-01-27 16:01:12,141 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 16:01:12,142 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 16:01:12,142 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 16:01:12,142 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 16:01:12,152 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:01:12" (1/1) ... [2024-01-27 16:01:12,152 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:01:12" (1/1) ... [2024-01-27 16:01:12,162 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:01:12" (1/1) ... [2024-01-27 16:01:12,176 INFO L175 MemorySlicer]: Split 18 memory accesses to 6 slices as follows [2, 1, 2, 3, 8, 2]. 44 percent of accesses are in the largest equivalence class. The 11 initializations are split as follows [2, 1, 0, 0, 8, 0]. The 4 writes are split as follows [0, 0, 1, 2, 0, 1]. [2024-01-27 16:01:12,177 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:01:12" (1/1) ... [2024-01-27 16:01:12,177 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:01:12" (1/1) ... [2024-01-27 16:01:12,186 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:01:12" (1/1) ... [2024-01-27 16:01:12,189 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:01:12" (1/1) ... [2024-01-27 16:01:12,192 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:01:12" (1/1) ... [2024-01-27 16:01:12,193 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:01:12" (1/1) ... [2024-01-27 16:01:12,196 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 16:01:12,197 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 16:01:12,197 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 16:01:12,197 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 16:01:12,198 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:01:12" (1/1) ... [2024-01-27 16:01:12,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 16:01:12,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:01:12,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 16:01:12,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 16:01:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 16:01:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 16:01:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 16:01:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 16:01:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 16:01:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-01-27 16:01:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-27 16:01:12,276 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-27 16:01:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-27 16:01:12,276 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-27 16:01:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 16:01:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 16:01:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 16:01:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 16:01:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 16:01:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-01-27 16:01:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-27 16:01:12,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 16:01:12,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 16:01:12,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 16:01:12,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-01-27 16:01:12,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-01-27 16:01:12,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-01-27 16:01:12,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-01-27 16:01:12,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-01-27 16:01:12,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2024-01-27 16:01:12,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 16:01:12,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 16:01:12,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 16:01:12,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 16:01:12,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 16:01:12,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-01-27 16:01:12,282 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-27 16:01:12,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 16:01:12,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 16:01:12,283 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 16:01:12,418 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 16:01:12,420 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 16:01:12,635 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 16:01:12,635 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 16:01:12,837 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 16:01:12,837 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-27 16:01:12,837 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 04:01:12 BoogieIcfgContainer [2024-01-27 16:01:12,837 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 16:01:12,840 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 16:01:12,840 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 16:01:12,842 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 16:01:12,843 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 04:01:11" (1/3) ... [2024-01-27 16:01:12,843 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79feda89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 04:01:12, skipping insertion in model container [2024-01-27 16:01:12,843 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:01:12" (2/3) ... [2024-01-27 16:01:12,843 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79feda89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 04:01:12, skipping insertion in model container [2024-01-27 16:01:12,844 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 04:01:12" (3/3) ... [2024-01-27 16:01:12,844 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_ok.i [2024-01-27 16:01:12,852 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 16:01:12,861 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 16:01:12,861 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-01-27 16:01:12,862 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 16:01:12,922 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 16:01:12,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 47 transitions, 108 flow [2024-01-27 16:01:12,994 INFO L124 PetriNetUnfolderBase]: 8/45 cut-off events. [2024-01-27 16:01:12,994 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 16:01:12,997 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. [2024-01-27 16:01:12,998 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 47 transitions, 108 flow [2024-01-27 16:01:13,001 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 43 transitions, 95 flow [2024-01-27 16:01:13,024 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:01:13,032 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@786a850c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:01:13,032 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-01-27 16:01:13,049 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:01:13,049 INFO L124 PetriNetUnfolderBase]: 8/40 cut-off events. [2024-01-27 16:01:13,050 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 16:01:13,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:01:13,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:01:13,051 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-27 16:01:13,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:01:13,058 INFO L85 PathProgramCache]: Analyzing trace with hash -54902984, now seen corresponding path program 1 times [2024-01-27 16:01:13,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:01:13,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64388266] [2024-01-27 16:01:13,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:13,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:01:13,274 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-27 16:01:13,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187283444] [2024-01-27 16:01:13,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:13,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:13,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:01:13,284 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:01:13,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 16:01:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:01:13,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-27 16:01:13,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:01:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:01:13,594 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 16:01:13,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:01:13,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64388266] [2024-01-27 16:01:13,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-27 16:01:13,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187283444] [2024-01-27 16:01:13,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187283444] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:01:13,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:01:13,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 16:01:13,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103023150] [2024-01-27 16:01:13,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:01:13,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 16:01:13,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:01:13,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 16:01:13,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 16:01:13,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-01-27 16:01:13,649 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) [2024-01-27 16:01:13,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:01:13,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-01-27 16:01:13,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:01:13,877 INFO L124 PetriNetUnfolderBase]: 411/738 cut-off events. [2024-01-27 16:01:13,877 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-01-27 16:01:13,882 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 3594 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. [2024-01-27 16:01:13,888 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 27 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2024-01-27 16:01:13,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 141 flow [2024-01-27 16:01:13,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 16:01:13,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 16:01:13,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-01-27 16:01:13,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49645390070921985 [2024-01-27 16:01:13,902 INFO L175 Difference]: Start difference. First operand has 42 places, 43 transitions, 95 flow. Second operand 3 states and 70 transitions. [2024-01-27 16:01:13,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 141 flow [2024-01-27 16:01:13,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 136 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-27 16:01:13,908 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 82 flow [2024-01-27 16:01:13,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2024-01-27 16:01:13,912 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2024-01-27 16:01:13,913 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 82 flow [2024-01-27 16:01:13,913 INFO L496 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) [2024-01-27 16:01:13,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:01:13,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:01:13,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 16:01:14,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-01-27 16:01:14,129 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-27 16:01:14,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:01:14,129 INFO L85 PathProgramCache]: Analyzing trace with hash -9242595, now seen corresponding path program 1 times [2024-01-27 16:01:14,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:01:14,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240373287] [2024-01-27 16:01:14,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:14,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:01:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:01:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:01:14,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:01:14,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240373287] [2024-01-27 16:01:14,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240373287] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:01:14,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:01:14,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 16:01:14,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43169072] [2024-01-27 16:01:14,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:01:14,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 16:01:14,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:01:14,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 16:01:14,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 16:01:14,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-01-27 16:01:14,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 82 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) [2024-01-27 16:01:14,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:01:14,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-01-27 16:01:14,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:01:14,632 INFO L124 PetriNetUnfolderBase]: 651/1197 cut-off events. [2024-01-27 16:01:14,632 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 16:01:14,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2259 conditions, 1197 events. 651/1197 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5526 event pairs, 233 based on Foata normal form. 20/1104 useless extension candidates. Maximal degree in co-relation 2253. Up to 590 conditions per place. [2024-01-27 16:01:14,639 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 43 selfloop transitions, 3 changer transitions 3/59 dead transitions. [2024-01-27 16:01:14,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 59 transitions, 225 flow [2024-01-27 16:01:14,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 16:01:14,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 16:01:14,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-01-27 16:01:14,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6524822695035462 [2024-01-27 16:01:14,643 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 82 flow. Second operand 3 states and 92 transitions. [2024-01-27 16:01:14,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 59 transitions, 225 flow [2024-01-27 16:01:14,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 59 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 16:01:14,646 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 96 flow [2024-01-27 16:01:14,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2024-01-27 16:01:14,647 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2024-01-27 16:01:14,648 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 96 flow [2024-01-27 16:01:14,648 INFO L496 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) [2024-01-27 16:01:14,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:01:14,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:01:14,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 16:01:14,649 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-27 16:01:14,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:01:14,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1702023884, now seen corresponding path program 1 times [2024-01-27 16:01:14,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:01:14,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831845376] [2024-01-27 16:01:14,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:14,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:01:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:01:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:01:14,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:01:14,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831845376] [2024-01-27 16:01:14,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831845376] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:01:14,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:01:14,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 16:01:14,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247306100] [2024-01-27 16:01:14,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:01:14,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 16:01:14,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:01:14,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 16:01:14,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 16:01:14,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-01-27 16:01:14,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 96 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) [2024-01-27 16:01:14,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:01:14,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-01-27 16:01:14,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:01:15,011 INFO L124 PetriNetUnfolderBase]: 707/1327 cut-off events. [2024-01-27 16:01:15,011 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-01-27 16:01:15,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2584 conditions, 1327 events. 707/1327 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6434 event pairs, 223 based on Foata normal form. 0/1220 useless extension candidates. Maximal degree in co-relation 2576. Up to 917 conditions per place. [2024-01-27 16:01:15,019 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 40 selfloop transitions, 2 changer transitions 3/55 dead transitions. [2024-01-27 16:01:15,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 55 transitions, 221 flow [2024-01-27 16:01:15,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 16:01:15,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 16:01:15,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-01-27 16:01:15,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-01-27 16:01:15,022 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 96 flow. Second operand 3 states and 84 transitions. [2024-01-27 16:01:15,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 55 transitions, 221 flow [2024-01-27 16:01:15,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 16:01:15,028 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 105 flow [2024-01-27 16:01:15,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2024-01-27 16:01:15,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2024-01-27 16:01:15,030 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 105 flow [2024-01-27 16:01:15,030 INFO L496 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) [2024-01-27 16:01:15,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:01:15,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:01:15,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 16:01:15,032 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-27 16:01:15,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:01:15,033 INFO L85 PathProgramCache]: Analyzing trace with hash 767173551, now seen corresponding path program 1 times [2024-01-27 16:01:15,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:01:15,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045940919] [2024-01-27 16:01:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:15,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:01:15,050 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-27 16:01:15,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580827597] [2024-01-27 16:01:15,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:15,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:15,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:01:15,052 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:01:15,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 16:01:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:01:15,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 16:01:15,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:01:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:01:15,209 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 16:01:15,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:01:15,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045940919] [2024-01-27 16:01:15,210 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-27 16:01:15,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580827597] [2024-01-27 16:01:15,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580827597] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:01:15,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:01:15,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 16:01:15,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106902351] [2024-01-27 16:01:15,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:01:15,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 16:01:15,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:01:15,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 16:01:15,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 16:01:15,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-01-27 16:01:15,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 105 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) [2024-01-27 16:01:15,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:01:15,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-01-27 16:01:15,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:01:15,500 INFO L124 PetriNetUnfolderBase]: 909/1653 cut-off events. [2024-01-27 16:01:15,500 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2024-01-27 16:01:15,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3390 conditions, 1653 events. 909/1653 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 8395 event pairs, 335 based on Foata normal form. 0/1520 useless extension candidates. Maximal degree in co-relation 3380. Up to 811 conditions per place. [2024-01-27 16:01:15,510 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 79 selfloop transitions, 6 changer transitions 0/94 dead transitions. [2024-01-27 16:01:15,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 94 transitions, 411 flow [2024-01-27 16:01:15,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 16:01:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 16:01:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-01-27 16:01:15,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5709219858156028 [2024-01-27 16:01:15,515 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 105 flow. Second operand 6 states and 161 transitions. [2024-01-27 16:01:15,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 94 transitions, 411 flow [2024-01-27 16:01:15,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 94 transitions, 409 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 16:01:15,520 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 131 flow [2024-01-27 16:01:15,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=131, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2024-01-27 16:01:15,524 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2024-01-27 16:01:15,525 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 131 flow [2024-01-27 16:01:15,525 INFO L496 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) [2024-01-27 16:01:15,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:01:15,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:01:15,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 16:01:15,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-01-27 16:01:15,742 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-27 16:01:15,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:01:15,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1325957365, now seen corresponding path program 1 times [2024-01-27 16:01:15,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:01:15,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117655192] [2024-01-27 16:01:15,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:15,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:01:15,762 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-27 16:01:15,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715899222] [2024-01-27 16:01:15,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:15,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:15,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:01:15,764 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:01:15,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 16:01:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:01:15,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-27 16:01:15,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:01:15,911 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 [2024-01-27 16:01:15,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:01:15,927 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 16:01:15,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:01:15,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117655192] [2024-01-27 16:01:15,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-27 16:01:15,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715899222] [2024-01-27 16:01:15,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715899222] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:01:15,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:01:15,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 16:01:15,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004831888] [2024-01-27 16:01:15,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:01:15,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 16:01:15,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:01:15,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 16:01:15,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 16:01:15,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-01-27 16:01:15,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 131 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) [2024-01-27 16:01:15,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:01:15,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-01-27 16:01:15,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:01:16,087 INFO L124 PetriNetUnfolderBase]: 529/1105 cut-off events. [2024-01-27 16:01:16,088 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2024-01-27 16:01:16,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2412 conditions, 1105 events. 529/1105 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 5201 event pairs, 135 based on Foata normal form. 56/1113 useless extension candidates. Maximal degree in co-relation 2400. Up to 594 conditions per place. [2024-01-27 16:01:16,094 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 41 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2024-01-27 16:01:16,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 253 flow [2024-01-27 16:01:16,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 16:01:16,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 16:01:16,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-01-27 16:01:16,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5886524822695035 [2024-01-27 16:01:16,096 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 131 flow. Second operand 3 states and 83 transitions. [2024-01-27 16:01:16,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 253 flow [2024-01-27 16:01:16,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 249 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 16:01:16,100 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 136 flow [2024-01-27 16:01:16,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-01-27 16:01:16,102 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-01-27 16:01:16,102 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 136 flow [2024-01-27 16:01:16,103 INFO L496 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) [2024-01-27 16:01:16,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:01:16,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:01:16,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 16:01:16,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:16,317 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-27 16:01:16,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:01:16,317 INFO L85 PathProgramCache]: Analyzing trace with hash 929424637, now seen corresponding path program 1 times [2024-01-27 16:01:16,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:01:16,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842504585] [2024-01-27 16:01:16,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:16,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:01:16,334 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-27 16:01:16,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268487817] [2024-01-27 16:01:16,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:16,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:16,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:01:16,336 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:01:16,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 16:01:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:01:16,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 16:01:16,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:01:16,622 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 [2024-01-27 16:01:16,772 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 [2024-01-27 16:01:16,933 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 [2024-01-27 16:01:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:01:16,944 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 16:01:16,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:01:16,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842504585] [2024-01-27 16:01:16,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-27 16:01:16,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268487817] [2024-01-27 16:01:16,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268487817] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:01:16,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:01:16,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 16:01:16,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424944347] [2024-01-27 16:01:16,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:01:16,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 16:01:16,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:01:16,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 16:01:16,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-01-27 16:01:16,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-01-27 16:01:16,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 136 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) [2024-01-27 16:01:16,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:01:16,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-01-27 16:01:16,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:01:17,357 INFO L124 PetriNetUnfolderBase]: 775/1591 cut-off events. [2024-01-27 16:01:17,358 INFO L125 PetriNetUnfolderBase]: For 279/279 co-relation queries the response was YES. [2024-01-27 16:01:17,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3640 conditions, 1591 events. 775/1591 cut-off events. For 279/279 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 8280 event pairs, 115 based on Foata normal form. 12/1546 useless extension candidates. Maximal degree in co-relation 3628. Up to 743 conditions per place. [2024-01-27 16:01:17,365 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 90 selfloop transitions, 12 changer transitions 9/121 dead transitions. [2024-01-27 16:01:17,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 121 transitions, 591 flow [2024-01-27 16:01:17,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 16:01:17,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 16:01:17,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-01-27 16:01:17,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5342789598108747 [2024-01-27 16:01:17,367 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 136 flow. Second operand 9 states and 226 transitions. [2024-01-27 16:01:17,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 121 transitions, 591 flow [2024-01-27 16:01:17,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 121 transitions, 572 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 16:01:17,372 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 223 flow [2024-01-27 16:01:17,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=223, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2024-01-27 16:01:17,374 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-01-27 16:01:17,374 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 223 flow [2024-01-27 16:01:17,374 INFO L496 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) [2024-01-27 16:01:17,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:01:17,374 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:01:17,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 16:01:17,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:17,590 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-27 16:01:17,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:01:17,591 INFO L85 PathProgramCache]: Analyzing trace with hash -284553893, now seen corresponding path program 1 times [2024-01-27 16:01:17,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:01:17,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060219170] [2024-01-27 16:01:17,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:17,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:01:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:01:17,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:01:17,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060219170] [2024-01-27 16:01:17,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2024-01-27 16:01:17,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911041432] [2024-01-27 16:01:17,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:17,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:17,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:01:17,629 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:01:17,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 16:01:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:01:17,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 2 conjunts are in the unsatisfiable core [2024-01-27 16:01:17,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:01:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:01:17,779 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 16:01:17,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911041432] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:01:17,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:01:17,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 16:01:17,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530177020] [2024-01-27 16:01:17,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:01:17,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 16:01:17,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:01:17,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 16:01:17,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 16:01:17,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-01-27 16:01:17,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 223 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) [2024-01-27 16:01:17,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:01:17,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-01-27 16:01:17,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:01:17,950 INFO L124 PetriNetUnfolderBase]: 667/1360 cut-off events. [2024-01-27 16:01:17,950 INFO L125 PetriNetUnfolderBase]: For 624/624 co-relation queries the response was YES. [2024-01-27 16:01:17,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3310 conditions, 1360 events. 667/1360 cut-off events. For 624/624 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 6297 event pairs, 196 based on Foata normal form. 32/1356 useless extension candidates. Maximal degree in co-relation 3291. Up to 769 conditions per place. [2024-01-27 16:01:17,956 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 47 selfloop transitions, 3 changer transitions 5/64 dead transitions. [2024-01-27 16:01:17,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 64 transitions, 362 flow [2024-01-27 16:01:17,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 16:01:17,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 16:01:17,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-01-27 16:01:17,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5886524822695035 [2024-01-27 16:01:17,957 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 223 flow. Second operand 3 states and 83 transitions. [2024-01-27 16:01:17,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 64 transitions, 362 flow [2024-01-27 16:01:17,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 341 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-01-27 16:01:17,963 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 197 flow [2024-01-27 16:01:17,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2024-01-27 16:01:17,964 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-01-27 16:01:17,964 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 197 flow [2024-01-27 16:01:17,964 INFO L496 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) [2024-01-27 16:01:17,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:01:17,964 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:01:17,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 16:01:18,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:18,180 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-27 16:01:18,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:01:18,181 INFO L85 PathProgramCache]: Analyzing trace with hash 300691042, now seen corresponding path program 1 times [2024-01-27 16:01:18,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:01:18,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127700364] [2024-01-27 16:01:18,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:18,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:01:18,215 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-27 16:01:18,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710265525] [2024-01-27 16:01:18,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:18,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:18,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:01:18,216 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:01:18,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 16:01:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:01:18,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-27 16:01:18,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:01:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:01:18,458 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 16:01:18,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:01:18,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127700364] [2024-01-27 16:01:18,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-27 16:01:18,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710265525] [2024-01-27 16:01:18,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710265525] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:01:18,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:01:18,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 16:01:18,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870329996] [2024-01-27 16:01:18,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:01:18,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 16:01:18,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:01:18,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 16:01:18,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 16:01:18,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-01-27 16:01:18,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 197 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) [2024-01-27 16:01:18,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:01:18,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-01-27 16:01:18,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:01:18,590 INFO L124 PetriNetUnfolderBase]: 449/926 cut-off events. [2024-01-27 16:01:18,591 INFO L125 PetriNetUnfolderBase]: For 491/491 co-relation queries the response was YES. [2024-01-27 16:01:18,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2350 conditions, 926 events. 449/926 cut-off events. For 491/491 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3679 event pairs, 337 based on Foata normal form. 0/906 useless extension candidates. Maximal degree in co-relation 2333. Up to 780 conditions per place. [2024-01-27 16:01:18,596 INFO L140 encePairwiseOnDemand]: 45/47 looper letters, 33 selfloop transitions, 1 changer transitions 1/43 dead transitions. [2024-01-27 16:01:18,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 43 transitions, 250 flow [2024-01-27 16:01:18,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 16:01:18,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 16:01:18,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-01-27 16:01:18,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45390070921985815 [2024-01-27 16:01:18,597 INFO L175 Difference]: Start difference. First operand has 62 places, 48 transitions, 197 flow. Second operand 3 states and 64 transitions. [2024-01-27 16:01:18,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 43 transitions, 250 flow [2024-01-27 16:01:18,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 43 transitions, 233 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-01-27 16:01:18,601 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 163 flow [2024-01-27 16:01:18,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=56, PETRI_TRANSITIONS=42} [2024-01-27 16:01:18,601 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-01-27 16:01:18,601 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 163 flow [2024-01-27 16:01:18,602 INFO L496 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) [2024-01-27 16:01:18,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:01:18,602 INFO L208 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] [2024-01-27 16:01:18,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 16:01:18,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:18,812 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-27 16:01:18,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:01:18,813 INFO L85 PathProgramCache]: Analyzing trace with hash 768569235, now seen corresponding path program 1 times [2024-01-27 16:01:18,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:01:18,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948644998] [2024-01-27 16:01:18,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:18,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:01:18,831 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-27 16:01:18,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772262690] [2024-01-27 16:01:18,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:18,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:18,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:01:18,833 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:01:18,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 16:01:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:01:19,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 44 conjunts are in the unsatisfiable core [2024-01-27 16:01:19,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:01:19,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-01-27 16:01:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:01:19,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:01:29,111 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 478 treesize of output 458 [2024-01-27 16:01:29,217 INFO L349 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2024-01-27 16:01:29,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 508 treesize of output 439 [2024-01-27 16:01:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:01:47,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:01:47,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948644998] [2024-01-27 16:01:47,913 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-27 16:01:47,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772262690] [2024-01-27 16:01:47,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772262690] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:01:47,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-01-27 16:01:47,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2024-01-27 16:01:47,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328254274] [2024-01-27 16:01:47,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-01-27 16:01:47,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 16:01:47,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:01:47,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 16:01:47,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2024-01-27 16:01:48,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-01-27 16:01:48,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 42 transitions, 163 flow. Second operand has 27 states, 27 states have (on average 13.37037037037037) internal successors, (361), 27 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:01:48,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:01:48,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-01-27 16:01:48,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:02:34,702 WARN L293 SmtUtils]: Spent 44.94s on a formula simplification. DAG size of input: 133 DAG size of output: 131 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:03:11,577 WARN L293 SmtUtils]: Spent 32.15s on a formula simplification. DAG size of input: 130 DAG size of output: 127 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:03:13,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-01-27 16:03:39,449 WARN L293 SmtUtils]: Spent 20.53s on a formula simplification. DAG size of input: 125 DAG size of output: 123 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:03:52,978 WARN L293 SmtUtils]: Spent 11.46s on a formula simplification. DAG size of input: 133 DAG size of output: 115 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:04:15,092 WARN L293 SmtUtils]: Spent 18.15s on a formula simplification. DAG size of input: 130 DAG size of output: 112 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:04:27,805 WARN L293 SmtUtils]: Spent 6.13s on a formula simplification that was a NOOP. DAG size: 103 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:04:44,441 WARN L293 SmtUtils]: Spent 15.04s on a formula simplification. DAG size of input: 130 DAG size of output: 129 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:05:16,223 WARN L293 SmtUtils]: Spent 31.40s on a formula simplification. DAG size of input: 135 DAG size of output: 133 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:06:11,888 WARN L293 SmtUtils]: Spent 34.42s on a formula simplification. DAG size of input: 134 DAG size of output: 131 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:06:40,562 WARN L293 SmtUtils]: Spent 20.67s on a formula simplification. DAG size of input: 134 DAG size of output: 116 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:06:43,026 INFO L124 PetriNetUnfolderBase]: 1208/2516 cut-off events. [2024-01-27 16:06:43,026 INFO L125 PetriNetUnfolderBase]: For 1026/1026 co-relation queries the response was YES. [2024-01-27 16:06:43,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5973 conditions, 2516 events. 1208/2516 cut-off events. For 1026/1026 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 13564 event pairs, 29 based on Foata normal form. 22/2524 useless extension candidates. Maximal degree in co-relation 5956. Up to 379 conditions per place. [2024-01-27 16:06:43,040 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 219 selfloop transitions, 89 changer transitions 58/373 dead transitions. [2024-01-27 16:06:43,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 373 transitions, 1960 flow [2024-01-27 16:06:43,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-01-27 16:06:43,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-01-27 16:06:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 870 transitions. [2024-01-27 16:06:43,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024051803885291 [2024-01-27 16:06:43,044 INFO L175 Difference]: Start difference. First operand has 56 places, 42 transitions, 163 flow. Second operand 46 states and 870 transitions. [2024-01-27 16:06:43,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 373 transitions, 1960 flow [2024-01-27 16:06:43,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 373 transitions, 1959 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 16:06:43,053 INFO L231 Difference]: Finished difference. Result has 114 places, 123 transitions, 865 flow [2024-01-27 16:06:43,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=865, PETRI_PLACES=114, PETRI_TRANSITIONS=123} [2024-01-27 16:06:43,055 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-01-27 16:06:43,055 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 123 transitions, 865 flow [2024-01-27 16:06:43,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 13.37037037037037) internal successors, (361), 27 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:06:43,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:06:43,055 INFO L208 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] [2024-01-27 16:06:43,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-01-27 16:06:43,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:06:43,256 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-27 16:06:43,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:06:43,256 INFO L85 PathProgramCache]: Analyzing trace with hash 815849695, now seen corresponding path program 2 times [2024-01-27 16:06:43,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:06:43,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052630877] [2024-01-27 16:06:43,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:06:43,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:06:43,278 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-27 16:06:43,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587449017] [2024-01-27 16:06:43,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 16:06:43,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:06:43,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:06:43,282 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:06:43,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 16:06:43,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 16:06:43,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:06:43,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 46 conjunts are in the unsatisfiable core [2024-01-27 16:06:43,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:06:44,257 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 55 treesize of output 41 [2024-01-27 16:06:44,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 61 [2024-01-27 16:06:44,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 18 [2024-01-27 16:06:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:06:44,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:06:56,263 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 510 treesize of output 490 [2024-01-27 16:06:56,291 INFO L349 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2024-01-27 16:06:56,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 544 treesize of output 475 [2024-01-27 16:07:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:07:13,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:07:13,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052630877] [2024-01-27 16:07:13,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-27 16:07:13,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587449017] [2024-01-27 16:07:13,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587449017] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:07:13,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-01-27 16:07:13,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2024-01-27 16:07:13,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441471577] [2024-01-27 16:07:13,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-01-27 16:07:13,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 16:07:13,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:07:13,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 16:07:13,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2024-01-27 16:07:14,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-01-27 16:07:14,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 123 transitions, 865 flow. Second operand has 29 states, 29 states have (on average 12.344827586206897) internal successors, (358), 29 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:07:14,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:07:14,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-01-27 16:07:14,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:07:39,858 WARN L293 SmtUtils]: Spent 21.01s on a formula simplification. DAG size of input: 180 DAG size of output: 59 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:07:54,496 WARN L293 SmtUtils]: Spent 13.77s on a formula simplification. DAG size of input: 197 DAG size of output: 92 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:08:03,791 WARN L293 SmtUtils]: Spent 8.34s on a formula simplification. DAG size of input: 102 DAG size of output: 54 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:08:40,289 WARN L293 SmtUtils]: Spent 33.94s on a formula simplification. DAG size of input: 119 DAG size of output: 84 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:08:59,760 WARN L293 SmtUtils]: Spent 7.16s on a formula simplification. DAG size of input: 182 DAG size of output: 53 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:09:29,364 WARN L293 SmtUtils]: Spent 24.40s on a formula simplification. DAG size of input: 103 DAG size of output: 55 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:09:37,475 WARN L293 SmtUtils]: Spent 6.57s on a formula simplification. DAG size of input: 136 DAG size of output: 69 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:09:48,970 WARN L293 SmtUtils]: Spent 9.80s on a formula simplification. DAG size of input: 99 DAG size of output: 51 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:10:01,153 WARN L293 SmtUtils]: Spent 11.38s on a formula simplification. DAG size of input: 180 DAG size of output: 76 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:10:15,129 WARN L293 SmtUtils]: Spent 8.66s on a formula simplification. DAG size of input: 117 DAG size of output: 82 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:10:26,521 WARN L293 SmtUtils]: Spent 10.45s on a formula simplification. DAG size of input: 197 DAG size of output: 106 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:10:33,840 INFO L124 PetriNetUnfolderBase]: 2436/5119 cut-off events. [2024-01-27 16:10:33,840 INFO L125 PetriNetUnfolderBase]: For 11209/11209 co-relation queries the response was YES. [2024-01-27 16:10:33,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15037 conditions, 5119 events. 2436/5119 cut-off events. For 11209/11209 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 32637 event pairs, 302 based on Foata normal form. 76/5187 useless extension candidates. Maximal degree in co-relation 15004. Up to 1384 conditions per place. [2024-01-27 16:10:33,867 INFO L140 encePairwiseOnDemand]: 32/47 looper letters, 298 selfloop transitions, 131 changer transitions 77/515 dead transitions. [2024-01-27 16:10:33,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 515 transitions, 3687 flow [2024-01-27 16:10:33,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-01-27 16:10:33,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2024-01-27 16:10:33,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 934 transitions. [2024-01-27 16:10:33,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3613152804642166 [2024-01-27 16:10:33,872 INFO L175 Difference]: Start difference. First operand has 114 places, 123 transitions, 865 flow. Second operand 55 states and 934 transitions. [2024-01-27 16:10:33,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 515 transitions, 3687 flow [2024-01-27 16:10:33,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 515 transitions, 3312 flow, removed 162 selfloop flow, removed 10 redundant places. [2024-01-27 16:10:33,921 INFO L231 Difference]: Finished difference. Result has 175 places, 225 transitions, 1783 flow [2024-01-27 16:10:33,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=1783, PETRI_PLACES=175, PETRI_TRANSITIONS=225} [2024-01-27 16:10:33,921 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-01-27 16:10:33,922 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 225 transitions, 1783 flow [2024-01-27 16:10:33,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 12.344827586206897) internal successors, (358), 29 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:10:33,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:10:33,922 INFO L208 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] [2024-01-27 16:10:33,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-27 16:10:34,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-01-27 16:10:34,125 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-27 16:10:34,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:10:34,126 INFO L85 PathProgramCache]: Analyzing trace with hash -2040143523, now seen corresponding path program 3 times [2024-01-27 16:10:34,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:10:34,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883255253] [2024-01-27 16:10:34,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:10:34,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:10:34,143 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-27 16:10:34,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588752361] [2024-01-27 16:10:34,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 16:10:34,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:10:34,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:10:34,145 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:10:34,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 16:10:34,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 16:10:34,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:10:34,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 56 conjunts are in the unsatisfiable core [2024-01-27 16:10:34,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:10:34,740 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 [2024-01-27 16:10:34,899 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 54 treesize of output 40 [2024-01-27 16:10:35,538 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 57 treesize of output 43 [2024-01-27 16:10:35,886 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 [2024-01-27 16:10:35,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:10:35,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:11:48,771 WARN L293 SmtUtils]: Spent 26.28s on a formula simplification. DAG size of input: 711 DAG size of output: 694 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:12:39,185 WARN L293 SmtUtils]: Spent 30.91s on a formula simplification. DAG size of input: 564 DAG size of output: 558 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:13:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:13:47,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:13:47,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883255253] [2024-01-27 16:13:47,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-27 16:13:47,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588752361] [2024-01-27 16:13:47,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588752361] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:13:47,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-01-27 16:13:47,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2024-01-27 16:13:47,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70177081] [2024-01-27 16:13:47,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-01-27 16:13:47,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 16:13:47,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:13:47,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 16:13:47,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=734, Unknown=1, NotChecked=0, Total=870 [2024-01-27 16:13:53,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-01-27 16:13:56,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-01-27 16:13:56,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 225 transitions, 1783 flow. Second operand has 30 states, 30 states have (on average 11.4) internal successors, (342), 30 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:13:56,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:13:56,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-01-27 16:13:56,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15