./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 052a68c73a5d1c6e7122fc0c660c02483f37277d0239d876d93b351fcdd64a16 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:58:41,014 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:58:41,108 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:58:41,115 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:58:41,116 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:58:41,149 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:58:41,150 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:58:41,150 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:58:41,151 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:58:41,156 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:58:41,156 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:58:41,156 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:58:41,158 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:58:41,160 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:58:41,160 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:58:41,160 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:58:41,161 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:58:41,161 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:58:41,161 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:58:41,162 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:58:41,162 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:58:41,162 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:58:41,163 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:58:41,163 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:58:41,163 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:58:41,164 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:58:41,164 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:58:41,164 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:58:41,165 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:58:41,165 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:58:41,167 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:58:41,167 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:58:41,167 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:58:41,167 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:58:41,168 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:58:41,168 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:58:41,168 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:58:41,168 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:58:41,168 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:58:41,169 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:58:41,169 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:58:41,169 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:58:41,169 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:58:41,170 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 052a68c73a5d1c6e7122fc0c660c02483f37277d0239d876d93b351fcdd64a16 [2024-01-27 15:58:41,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:58:41,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:58:41,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:58:41,476 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:58:41,477 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:58:41,478 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c [2024-01-27 15:58:42,692 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:58:42,852 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:58:42,853 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c [2024-01-27 15:58:42,859 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31d5e8ff1/c8d74c4feb9b4e95b44917f996487496/FLAG5d5fcb48c [2024-01-27 15:58:42,870 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31d5e8ff1/c8d74c4feb9b4e95b44917f996487496 [2024-01-27 15:58:42,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:58:42,873 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:58:42,874 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:58:42,874 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:58:42,878 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:58:42,878 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:58:42" (1/1) ... [2024-01-27 15:58:42,879 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58062104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:42, skipping insertion in model container [2024-01-27 15:58:42,879 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:58:42" (1/1) ... [2024-01-27 15:58:42,897 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:58:43,034 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c[3001,3014] [2024-01-27 15:58:43,041 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:58:43,048 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:58:43,087 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c[3001,3014] [2024-01-27 15:58:43,090 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:58:43,129 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:58:43,130 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:43 WrapperNode [2024-01-27 15:58:43,130 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:58:43,132 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:58:43,132 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:58:43,133 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:58:43,140 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:43" (1/1) ... [2024-01-27 15:58:43,171 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:43" (1/1) ... [2024-01-27 15:58:43,257 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 209 [2024-01-27 15:58:43,258 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:58:43,259 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:58:43,259 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:58:43,259 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:58:43,284 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:43" (1/1) ... [2024-01-27 15:58:43,301 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:43" (1/1) ... [2024-01-27 15:58:43,317 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:43" (1/1) ... [2024-01-27 15:58:43,345 INFO L175 MemorySlicer]: Split 17 memory accesses to 4 slices as follows [2, 2, 2, 11]. 65 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-01-27 15:58:43,345 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:43" (1/1) ... [2024-01-27 15:58:43,346 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:43" (1/1) ... [2024-01-27 15:58:43,351 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:43" (1/1) ... [2024-01-27 15:58:43,354 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:43" (1/1) ... [2024-01-27 15:58:43,355 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:43" (1/1) ... [2024-01-27 15:58:43,372 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:43" (1/1) ... [2024-01-27 15:58:43,375 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:58:43,376 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:58:43,379 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:58:43,379 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:58:43,380 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:43" (1/1) ... [2024-01-27 15:58:43,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:58:43,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:43,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 15:58:43,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 15:58:43,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:58:43,445 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:58:43,445 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:58:43,445 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:58:43,446 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:58:43,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:58:43,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:58:43,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:58:43,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:58:43,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:58:43,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:58:43,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:58:43,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:58:43,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:58:43,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:58:43,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:58:43,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:58:43,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:58:43,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:58:43,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:58:43,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:58:43,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:58:43,450 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:58:43,542 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:58:43,544 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:58:43,833 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:58:43,834 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:58:44,150 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:58:44,151 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:58:44,152 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:58:44 BoogieIcfgContainer [2024-01-27 15:58:44,152 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:58:44,153 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:58:44,153 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:58:44,155 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:58:44,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:58:42" (1/3) ... [2024-01-27 15:58:44,156 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@768d11b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:58:44, skipping insertion in model container [2024-01-27 15:58:44,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:58:43" (2/3) ... [2024-01-27 15:58:44,156 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@768d11b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:58:44, skipping insertion in model container [2024-01-27 15:58:44,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:58:44" (3/3) ... [2024-01-27 15:58:44,157 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-5.wvr.c [2024-01-27 15:58:44,163 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:58:44,170 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:58:44,170 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:58:44,170 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:58:44,210 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:58:44,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2024-01-27 15:58:44,270 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2024-01-27 15:58:44,270 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:58:44,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-01-27 15:58:44,272 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2024-01-27 15:58:44,274 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2024-01-27 15:58:44,286 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:58:44,292 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;@cf5958d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:58:44,293 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:58:44,302 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:58:44,302 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2024-01-27 15:58:44,302 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:58:44,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:44,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:44,303 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:44,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:44,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1718060389, now seen corresponding path program 1 times [2024-01-27 15:58:44,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:44,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999688102] [2024-01-27 15:58:44,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:44,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:44,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:44,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999688102] [2024-01-27 15:58:44,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999688102] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:58:44,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:58:44,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:58:44,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150682287] [2024-01-27 15:58:44,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:58:44,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:58:44,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:44,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:58:44,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:58:44,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:44,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:44,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:44,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:44,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:45,537 INFO L124 PetriNetUnfolderBase]: 41/77 cut-off events. [2024-01-27 15:58:45,538 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-01-27 15:58:45,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 77 events. 41/77 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 131 event pairs, 24 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2024-01-27 15:58:45,542 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 16 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2024-01-27 15:58:45,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 19 transitions, 86 flow [2024-01-27 15:58:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:58:45,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:58:45,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 28 transitions. [2024-01-27 15:58:45,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-01-27 15:58:45,552 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 3 states and 28 transitions. [2024-01-27 15:58:45,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 19 transitions, 86 flow [2024-01-27 15:58:45,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 19 transitions, 78 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:58:45,556 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 52 flow [2024-01-27 15:58:45,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2024-01-27 15:58:45,559 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2024-01-27 15:58:45,560 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 52 flow [2024-01-27 15:58:45,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:45,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:45,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:45,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:58:45,561 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:45,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:45,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1182799970, now seen corresponding path program 1 times [2024-01-27 15:58:45,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:45,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882608362] [2024-01-27 15:58:45,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:45,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:45,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:45,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:45,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:45,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882608362] [2024-01-27 15:58:45,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882608362] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:58:45,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:58:45,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:58:45,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143757992] [2024-01-27 15:58:45,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:58:45,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:58:45,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:45,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:58:45,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:58:45,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:45,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:45,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:45,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:45,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:46,694 INFO L124 PetriNetUnfolderBase]: 72/137 cut-off events. [2024-01-27 15:58:46,695 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:58:46,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 137 events. 72/137 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 369 event pairs, 24 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 276. Up to 77 conditions per place. [2024-01-27 15:58:46,697 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 35 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2024-01-27 15:58:46,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 41 transitions, 181 flow [2024-01-27 15:58:46,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:58:46,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:58:46,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2024-01-27 15:58:46,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-01-27 15:58:46,701 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 52 flow. Second operand 5 states and 55 transitions. [2024-01-27 15:58:46,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 41 transitions, 181 flow [2024-01-27 15:58:46,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 41 transitions, 177 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 15:58:46,705 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 84 flow [2024-01-27 15:58:46,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2024-01-27 15:58:46,707 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2024-01-27 15:58:46,707 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 84 flow [2024-01-27 15:58:46,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:46,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:46,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:46,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:58:46,710 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:46,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:46,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1484230580, now seen corresponding path program 2 times [2024-01-27 15:58:46,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:46,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502582117] [2024-01-27 15:58:46,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:46,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:46,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:46,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502582117] [2024-01-27 15:58:46,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502582117] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:58:46,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:58:46,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:58:46,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19119184] [2024-01-27 15:58:46,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:58:46,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:58:46,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:46,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:58:46,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:58:46,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:46,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:46,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:46,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:46,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:51,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:58:51,175 INFO L124 PetriNetUnfolderBase]: 111/212 cut-off events. [2024-01-27 15:58:51,176 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2024-01-27 15:58:51,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 212 events. 111/212 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 666 event pairs, 42 based on Foata normal form. 2/173 useless extension candidates. Maximal degree in co-relation 588. Up to 133 conditions per place. [2024-01-27 15:58:51,178 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 37 selfloop transitions, 7 changer transitions 0/45 dead transitions. [2024-01-27 15:58:51,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 45 transitions, 254 flow [2024-01-27 15:58:51,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:58:51,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:58:51,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2024-01-27 15:58:51,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-01-27 15:58:51,179 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 84 flow. Second operand 5 states and 51 transitions. [2024-01-27 15:58:51,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 45 transitions, 254 flow [2024-01-27 15:58:51,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 45 transitions, 237 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-01-27 15:58:51,182 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 126 flow [2024-01-27 15:58:51,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2024-01-27 15:58:51,183 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 11 predicate places. [2024-01-27 15:58:51,183 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 126 flow [2024-01-27 15:58:51,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:51,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:51,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:51,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:58:51,184 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:51,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:51,184 INFO L85 PathProgramCache]: Analyzing trace with hash 668377760, now seen corresponding path program 3 times [2024-01-27 15:58:51,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:51,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892422637] [2024-01-27 15:58:51,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:51,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:51,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:51,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892422637] [2024-01-27 15:58:51,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892422637] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:58:51,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:58:51,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:58:51,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942214536] [2024-01-27 15:58:51,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:58:51,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:58:51,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:51,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:58:51,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:58:51,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:51,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:51,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:51,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:51,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:53,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:58:54,505 INFO L124 PetriNetUnfolderBase]: 121/228 cut-off events. [2024-01-27 15:58:54,506 INFO L125 PetriNetUnfolderBase]: For 317/317 co-relation queries the response was YES. [2024-01-27 15:58:54,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789 conditions, 228 events. 121/228 cut-off events. For 317/317 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 739 event pairs, 44 based on Foata normal form. 4/205 useless extension candidates. Maximal degree in co-relation 768. Up to 121 conditions per place. [2024-01-27 15:58:54,509 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 37 selfloop transitions, 12 changer transitions 0/50 dead transitions. [2024-01-27 15:58:54,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 50 transitions, 323 flow [2024-01-27 15:58:54,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:58:54,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:58:54,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2024-01-27 15:58:54,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-01-27 15:58:54,511 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 126 flow. Second operand 5 states and 56 transitions. [2024-01-27 15:58:54,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 50 transitions, 323 flow [2024-01-27 15:58:54,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 299 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-01-27 15:58:54,515 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 205 flow [2024-01-27 15:58:54,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=205, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2024-01-27 15:58:54,517 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 17 predicate places. [2024-01-27 15:58:54,517 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 205 flow [2024-01-27 15:58:54,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:54,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:54,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:54,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:58:54,518 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:54,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:54,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1966728336, now seen corresponding path program 4 times [2024-01-27 15:58:54,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:54,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900301473] [2024-01-27 15:58:54,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:54,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:54,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:54,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900301473] [2024-01-27 15:58:54,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900301473] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:58:54,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:58:54,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:58:54,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462287633] [2024-01-27 15:58:54,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:58:54,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:58:54,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:54,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:58:54,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:58:54,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:54,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:54,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:54,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:54,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:54,877 INFO L124 PetriNetUnfolderBase]: 117/224 cut-off events. [2024-01-27 15:58:54,878 INFO L125 PetriNetUnfolderBase]: For 545/545 co-relation queries the response was YES. [2024-01-27 15:58:54,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 852 conditions, 224 events. 117/224 cut-off events. For 545/545 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 723 event pairs, 50 based on Foata normal form. 4/201 useless extension candidates. Maximal degree in co-relation 828. Up to 177 conditions per place. [2024-01-27 15:58:54,880 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 32 selfloop transitions, 15 changer transitions 0/48 dead transitions. [2024-01-27 15:58:54,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 48 transitions, 377 flow [2024-01-27 15:58:54,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:58:54,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:58:54,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 50 transitions. [2024-01-27 15:58:54,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-01-27 15:58:54,881 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 205 flow. Second operand 5 states and 50 transitions. [2024-01-27 15:58:54,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 48 transitions, 377 flow [2024-01-27 15:58:54,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 48 transitions, 364 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-01-27 15:58:54,885 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 298 flow [2024-01-27 15:58:54,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=298, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2024-01-27 15:58:54,887 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 22 predicate places. [2024-01-27 15:58:54,887 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 298 flow [2024-01-27 15:58:54,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:54,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:54,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:54,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:58:54,889 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:54,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:54,890 INFO L85 PathProgramCache]: Analyzing trace with hash -2066136956, now seen corresponding path program 5 times [2024-01-27 15:58:54,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:54,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644287742] [2024-01-27 15:58:54,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:54,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:55,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:55,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:55,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644287742] [2024-01-27 15:58:55,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644287742] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:58:55,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:58:55,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:58:55,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113828188] [2024-01-27 15:58:55,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:58:55,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:58:55,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:55,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:58:55,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:58:55,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:55,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 298 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:55,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:55,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:55,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:55,246 INFO L124 PetriNetUnfolderBase]: 118/227 cut-off events. [2024-01-27 15:58:55,247 INFO L125 PetriNetUnfolderBase]: For 638/638 co-relation queries the response was YES. [2024-01-27 15:58:55,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 964 conditions, 227 events. 118/227 cut-off events. For 638/638 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 749 event pairs, 38 based on Foata normal form. 2/202 useless extension candidates. Maximal degree in co-relation 938. Up to 123 conditions per place. [2024-01-27 15:58:55,248 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 38 selfloop transitions, 14 changer transitions 0/53 dead transitions. [2024-01-27 15:58:55,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 53 transitions, 444 flow [2024-01-27 15:58:55,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:58:55,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:58:55,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 54 transitions. [2024-01-27 15:58:55,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-01-27 15:58:55,250 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 298 flow. Second operand 5 states and 54 transitions. [2024-01-27 15:58:55,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 53 transitions, 444 flow [2024-01-27 15:58:55,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 390 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-01-27 15:58:55,252 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 284 flow [2024-01-27 15:58:55,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=284, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-01-27 15:58:55,253 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2024-01-27 15:58:55,253 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 284 flow [2024-01-27 15:58:55,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:55,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:55,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:55,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:58:55,254 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:55,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:55,254 INFO L85 PathProgramCache]: Analyzing trace with hash -610489900, now seen corresponding path program 6 times [2024-01-27 15:58:55,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:55,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200198773] [2024-01-27 15:58:55,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:55,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:55,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:55,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200198773] [2024-01-27 15:58:55,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200198773] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:58:55,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:58:55,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:58:55,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669585348] [2024-01-27 15:58:55,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:58:55,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:58:55,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:55,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:58:55,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:58:55,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:55,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:55,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:55,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:55,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:55,559 INFO L124 PetriNetUnfolderBase]: 117/219 cut-off events. [2024-01-27 15:58:55,559 INFO L125 PetriNetUnfolderBase]: For 647/647 co-relation queries the response was YES. [2024-01-27 15:58:55,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 219 events. 117/219 cut-off events. For 647/647 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 694 event pairs, 49 based on Foata normal form. 2/194 useless extension candidates. Maximal degree in co-relation 873. Up to 170 conditions per place. [2024-01-27 15:58:55,561 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 34 selfloop transitions, 15 changer transitions 0/50 dead transitions. [2024-01-27 15:58:55,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 50 transitions, 416 flow [2024-01-27 15:58:55,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:58:55,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:58:55,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 50 transitions. [2024-01-27 15:58:55,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-01-27 15:58:55,562 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 284 flow. Second operand 5 states and 50 transitions. [2024-01-27 15:58:55,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 50 transitions, 416 flow [2024-01-27 15:58:55,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 50 transitions, 382 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-01-27 15:58:55,565 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 296 flow [2024-01-27 15:58:55,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2024-01-27 15:58:55,566 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 27 predicate places. [2024-01-27 15:58:55,566 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 296 flow [2024-01-27 15:58:55,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:58:55,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:55,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:55,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:58:55,567 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:55,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:55,567 INFO L85 PathProgramCache]: Analyzing trace with hash -2006130827, now seen corresponding path program 1 times [2024-01-27 15:58:55,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:55,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279766443] [2024-01-27 15:58:55,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:55,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:58:55,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:55,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279766443] [2024-01-27 15:58:55,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279766443] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:55,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167170569] [2024-01-27 15:58:55,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:55,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:55,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:55,769 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:55,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:58:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:55,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:58:55,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:56,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:58:56,420 INFO L349 Elim1Store]: treesize reduction 39, result has 20.4 percent of original size [2024-01-27 15:58:56,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 241 treesize of output 224 [2024-01-27 15:59:26,025 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 15:59:38,037 WARN L293 SmtUtils]: Spent 12.01s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 15:59:46,098 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:00:10,274 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:00:18,282 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:00:26,289 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:00:54,612 WARN L293 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:01:06,660 WARN L293 SmtUtils]: Spent 12.05s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:01:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:01:42,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:02:37,094 WARN L293 SmtUtils]: Spent 32.23s on a formula simplification. DAG size of input: 123 DAG size of output: 123 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:02:39,087 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 87 treesize of output 77 [2024-01-27 16:02:39,143 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 16:02:39,144 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 188 [2024-01-27 16:02:39,956 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 170 treesize of output 150 [2024-01-27 16:02:39,968 INFO L349 Elim1Store]: treesize reduction 156, result has 0.6 percent of original size [2024-01-27 16:02:39,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 572 treesize of output 1 [2024-01-27 16:02:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:02:40,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167170569] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:02:40,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:02:40,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 20 [2024-01-27 16:02:40,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697962499] [2024-01-27 16:02:40,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:02:40,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 16:02:40,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:02:40,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 16:02:40,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2024-01-27 16:02:40,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:02:40,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 296 flow. Second operand has 20 states, 20 states have (on average 5.4) internal successors, (108), 20 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 16:02:40,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:02:40,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:02:40,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:03:02,641 WARN L293 SmtUtils]: Spent 17.49s on a formula simplification. DAG size of input: 127 DAG size of output: 60 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:03:12,472 WARN L293 SmtUtils]: Spent 9.26s on a formula simplification. DAG size of input: 129 DAG size of output: 62 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:03:13,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:03:15,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:03:16,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:03:24,864 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 47 DAG size of output: 44 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:03:33,100 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 33 DAG size of output: 32 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:03:47,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:03:53,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:03:57,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:04:01,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 16:04:02,062 INFO L124 PetriNetUnfolderBase]: 387/747 cut-off events. [2024-01-27 16:04:02,062 INFO L125 PetriNetUnfolderBase]: For 1864/1864 co-relation queries the response was YES. [2024-01-27 16:04:02,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2916 conditions, 747 events. 387/747 cut-off events. For 1864/1864 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3663 event pairs, 39 based on Foata normal form. 5/638 useless extension candidates. Maximal degree in co-relation 2433. Up to 225 conditions per place. [2024-01-27 16:04:02,065 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 97 selfloop transitions, 46 changer transitions 60/204 dead transitions. [2024-01-27 16:04:02,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 204 transitions, 1551 flow [2024-01-27 16:04:02,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 16:04:02,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 16:04:02,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 233 transitions. [2024-01-27 16:04:02,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043290043290043 [2024-01-27 16:04:02,068 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 296 flow. Second operand 22 states and 233 transitions. [2024-01-27 16:04:02,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 204 transitions, 1551 flow [2024-01-27 16:04:02,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 204 transitions, 1451 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-01-27 16:04:02,080 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 721 flow [2024-01-27 16:04:02,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=721, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2024-01-27 16:04:02,081 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 60 predicate places. [2024-01-27 16:04:02,081 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 721 flow [2024-01-27 16:04:02,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.4) internal successors, (108), 20 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 16:04:02,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:04:02,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:04:02,098 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 16:04:02,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:04:02,295 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:04:02,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:04:02,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1078147337, now seen corresponding path program 2 times [2024-01-27 16:04:02,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:04:02,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589972555] [2024-01-27 16:04:02,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:04:02,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:04:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:04:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 16:04:02,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:04:02,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589972555] [2024-01-27 16:04:02,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589972555] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:04:02,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785638246] [2024-01-27 16:04:02,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 16:04:02,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:04:02,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:04:02,507 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 16:04:02,512 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 16:04:02,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 16:04:02,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:04:02,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 16:04:02,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:04:02,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 16:04:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:04:03,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:04:39,962 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 87 treesize of output 77 [2024-01-27 16:04:39,999 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 16:04:40,000 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 188 [2024-01-27 16:04:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:04:40,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785638246] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:04:40,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:04:40,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 22 [2024-01-27 16:04:40,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731640138] [2024-01-27 16:04:40,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:04:40,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 16:04:40,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:04:40,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 16:04:40,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-01-27 16:04:40,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:04:40,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 721 flow. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 16:04:40,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:04:40,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:04:40,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:04:55,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:05:07,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:05:09,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:05:28,749 WARN L293 SmtUtils]: Spent 18.75s on a formula simplification. DAG size of input: 115 DAG size of output: 107 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:05:30,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:05:31,044 INFO L124 PetriNetUnfolderBase]: 304/690 cut-off events. [2024-01-27 16:05:31,045 INFO L125 PetriNetUnfolderBase]: For 3856/3856 co-relation queries the response was YES. [2024-01-27 16:05:31,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3309 conditions, 690 events. 304/690 cut-off events. For 3856/3856 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3841 event pairs, 21 based on Foata normal form. 11/666 useless extension candidates. Maximal degree in co-relation 3151. Up to 256 conditions per place. [2024-01-27 16:05:31,051 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 94 selfloop transitions, 68 changer transitions 29/192 dead transitions. [2024-01-27 16:05:31,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 192 transitions, 1812 flow [2024-01-27 16:05:31,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-27 16:05:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-27 16:05:31,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 242 transitions. [2024-01-27 16:05:31,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4432234432234432 [2024-01-27 16:05:31,072 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 721 flow. Second operand 26 states and 242 transitions. [2024-01-27 16:05:31,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 192 transitions, 1812 flow [2024-01-27 16:05:31,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 192 transitions, 1654 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-01-27 16:05:31,088 INFO L231 Difference]: Finished difference. Result has 106 places, 95 transitions, 1088 flow [2024-01-27 16:05:31,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1088, PETRI_PLACES=106, PETRI_TRANSITIONS=95} [2024-01-27 16:05:31,089 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 84 predicate places. [2024-01-27 16:05:31,090 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 95 transitions, 1088 flow [2024-01-27 16:05:31,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 16:05:31,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:05:31,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:05:31,110 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 16:05:31,302 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,SelfDestructingSolverStorable8 [2024-01-27 16:05:31,302 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:05:31,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:05:31,303 INFO L85 PathProgramCache]: Analyzing trace with hash 909552583, now seen corresponding path program 3 times [2024-01-27 16:05:31,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:05:31,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769237101] [2024-01-27 16:05:31,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:05:31,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:05:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:05:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 16:05:31,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:05:31,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769237101] [2024-01-27 16:05:31,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769237101] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:05:31,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603034953] [2024-01-27 16:05:31,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 16:05:31,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:05:31,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:05:31,490 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 16:05:31,491 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 16:05:31,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 16:05:31,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:05:31,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 16:05:31,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:05:31,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 16:05:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:05:31,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:05:47,926 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:06:04,548 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 283 treesize of output 249 [2024-01-27 16:06:04,908 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 16:06:04,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 28 case distinctions, treesize of input 2575 treesize of output 1885 [2024-01-27 16:07:27,877 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-01-27 16:07:31,001 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-01-27 16:07:47,302 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-01-27 16:08:07,559 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-01-27 16:08:13,824 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-01-27 16:08:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:08:52,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603034953] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:08:52,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:08:52,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2024-01-27 16:08:52,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548469264] [2024-01-27 16:08:52,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:08:52,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 16:08:52,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:08:52,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 16:08:52,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-01-27 16:08:52,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:08:52,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 95 transitions, 1088 flow. Second operand has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:08:52,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:08:52,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:08:52,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:08:57,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:08:58,764 INFO L124 PetriNetUnfolderBase]: 298/658 cut-off events. [2024-01-27 16:08:58,764 INFO L125 PetriNetUnfolderBase]: For 4111/4111 co-relation queries the response was YES. [2024-01-27 16:08:58,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3523 conditions, 658 events. 298/658 cut-off events. For 4111/4111 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3555 event pairs, 35 based on Foata normal form. 15/672 useless extension candidates. Maximal degree in co-relation 3431. Up to 278 conditions per place. [2024-01-27 16:08:58,770 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 84 selfloop transitions, 43 changer transitions 58/186 dead transitions. [2024-01-27 16:08:58,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 186 transitions, 1910 flow [2024-01-27 16:08:58,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 16:08:58,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 16:08:58,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 221 transitions. [2024-01-27 16:08:58,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3897707231040564 [2024-01-27 16:08:58,772 INFO L175 Difference]: Start difference. First operand has 106 places, 95 transitions, 1088 flow. Second operand 27 states and 221 transitions. [2024-01-27 16:08:58,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 186 transitions, 1910 flow [2024-01-27 16:08:58,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 186 transitions, 1741 flow, removed 56 selfloop flow, removed 11 redundant places. [2024-01-27 16:08:58,787 INFO L231 Difference]: Finished difference. Result has 124 places, 80 transitions, 863 flow [2024-01-27 16:08:58,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=863, PETRI_PLACES=124, PETRI_TRANSITIONS=80} [2024-01-27 16:08:58,788 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 102 predicate places. [2024-01-27 16:08:58,788 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 80 transitions, 863 flow [2024-01-27 16:08:58,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:08:58,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:08:58,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:08:58,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-01-27 16:08:59,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:08:59,001 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:08:59,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:08:59,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1616002915, now seen corresponding path program 4 times [2024-01-27 16:08:59,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:08:59,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572033912] [2024-01-27 16:08:59,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:08:59,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:08:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:08:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 16:08:59,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:08:59,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572033912] [2024-01-27 16:08:59,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572033912] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:08:59,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836315221] [2024-01-27 16:08:59,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 16:08:59,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:08:59,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:08:59,232 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 16:08:59,233 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 16:08:59,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 16:08:59,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:08:59,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-27 16:08:59,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:08:59,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 16:08:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:08:59,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:09:20,967 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:09:28,978 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:09:51,487 WARN L293 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 11 DAG size of output: 1 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:09:59,989 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:10:08,000 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:10:32,206 WARN L293 SmtUtils]: Spent 7.52s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:10:57,707 WARN L293 SmtUtils]: Spent 25.41s on a formula simplification that was a NOOP. DAG size: 140 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:11:07,298 WARN L293 SmtUtils]: Spent 5.87s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:11:51,099 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-01-27 16:12:11,455 WARN L293 SmtUtils]: Spent 13.24s on a formula simplification that was a NOOP. DAG size: 144 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 16:12:24,586 WARN L293 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15