./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/36-apron_21-traces-cluster-based_true.i --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 448d4d75 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/36-apron_21-traces-cluster-based_true.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cec155e54548239c459fec40910e358deb5fad2ceffa658bfdeefddd1bc9e166 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-448d4d7-m [2024-02-20 11:38:10,840 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-20 11:38:10,917 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-20 11:38:10,920 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-20 11:38:10,921 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-20 11:38:10,943 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-20 11:38:10,944 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-20 11:38:10,944 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-20 11:38:10,960 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-20 11:38:10,961 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-20 11:38:10,961 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-20 11:38:10,961 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-20 11:38:10,962 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-20 11:38:10,962 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-20 11:38:10,962 INFO L153 SettingsManager]: * Use SBE=true [2024-02-20 11:38:10,963 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-20 11:38:10,963 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-20 11:38:10,964 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-20 11:38:10,964 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-20 11:38:10,964 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-20 11:38:10,964 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-20 11:38:10,965 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-20 11:38:10,965 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-20 11:38:10,965 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-20 11:38:10,966 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-20 11:38:10,966 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-20 11:38:10,966 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-20 11:38:10,966 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-20 11:38:10,967 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-20 11:38:10,967 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-20 11:38:10,967 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-20 11:38:10,967 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-20 11:38:10,967 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:38:10,967 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-20 11:38:10,968 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-20 11:38:10,968 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-20 11:38:10,968 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-20 11:38:10,968 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-20 11:38:10,969 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-20 11:38:10,969 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-20 11:38:10,969 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-20 11:38:10,969 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-20 11:38:10,969 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-20 11:38:10,970 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cec155e54548239c459fec40910e358deb5fad2ceffa658bfdeefddd1bc9e166 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-20 11:38:11,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-20 11:38:11,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-20 11:38:11,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-20 11:38:11,231 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-20 11:38:11,232 INFO L274 PluginConnector]: CDTParser initialized [2024-02-20 11:38:11,233 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/36-apron_21-traces-cluster-based_true.i [2024-02-20 11:38:12,306 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-20 11:38:12,506 INFO L384 CDTParser]: Found 1 translation units. [2024-02-20 11:38:12,507 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/36-apron_21-traces-cluster-based_true.i [2024-02-20 11:38:12,517 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7226891dd/0a1c06187af24a2b8eaeed0a256467a3/FLAG3b43e8544 [2024-02-20 11:38:12,529 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7226891dd/0a1c06187af24a2b8eaeed0a256467a3 [2024-02-20 11:38:12,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-20 11:38:12,537 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-20 11:38:12,539 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-20 11:38:12,539 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-20 11:38:12,543 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-20 11:38:12,544 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:38:12" (1/1) ... [2024-02-20 11:38:12,544 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b9e4435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:12, skipping insertion in model container [2024-02-20 11:38:12,544 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:38:12" (1/1) ... [2024-02-20 11:38:12,605 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-20 11:38:12,861 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/36-apron_21-traces-cluster-based_true.i[1092,1105] [2024-02-20 11:38:13,038 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:38:13,056 INFO L202 MainTranslator]: Completed pre-run [2024-02-20 11:38:13,066 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/36-apron_21-traces-cluster-based_true.i[1092,1105] [2024-02-20 11:38:13,091 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:38:13,119 INFO L206 MainTranslator]: Completed translation [2024-02-20 11:38:13,119 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:13 WrapperNode [2024-02-20 11:38:13,119 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-20 11:38:13,120 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-20 11:38:13,120 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-20 11:38:13,120 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-20 11:38:13,125 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:13" (1/1) ... [2024-02-20 11:38:13,134 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:13" (1/1) ... [2024-02-20 11:38:13,153 INFO L138 Inliner]: procedures = 166, calls = 53, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 149 [2024-02-20 11:38:13,153 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-20 11:38:13,154 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-20 11:38:13,154 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-20 11:38:13,154 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-20 11:38:13,162 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:13" (1/1) ... [2024-02-20 11:38:13,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:13" (1/1) ... [2024-02-20 11:38:13,165 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:13" (1/1) ... [2024-02-20 11:38:13,175 INFO L175 MemorySlicer]: Split 15 memory accesses to 6 slices as follows [2, 1, 5, 5, 1, 1]. 33 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 0, 5, 5, 0, 0]. The 3 writes are split as follows [0, 1, 0, 0, 1, 1]. [2024-02-20 11:38:13,175 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:13" (1/1) ... [2024-02-20 11:38:13,175 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:13" (1/1) ... [2024-02-20 11:38:13,181 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:13" (1/1) ... [2024-02-20 11:38:13,183 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:13" (1/1) ... [2024-02-20 11:38:13,185 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:13" (1/1) ... [2024-02-20 11:38:13,186 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:13" (1/1) ... [2024-02-20 11:38:13,188 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-20 11:38:13,189 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-20 11:38:13,189 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-20 11:38:13,189 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-20 11:38:13,189 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:13" (1/1) ... [2024-02-20 11:38:13,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:38:13,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:38:13,215 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-20 11:38:13,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-20 11:38:13,277 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-02-20 11:38:13,277 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-02-20 11:38:13,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-20 11:38:13,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-20 11:38:13,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-20 11:38:13,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-20 11:38:13,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-20 11:38:13,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-02-20 11:38:13,278 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-20 11:38:13,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-20 11:38:13,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-20 11:38:13,278 INFO L130 BoogieDeclarations]: Found specification of procedure t3_fun [2024-02-20 11:38:13,279 INFO L138 BoogieDeclarations]: Found implementation of procedure t3_fun [2024-02-20 11:38:13,279 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-02-20 11:38:13,279 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-02-20 11:38:13,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-20 11:38:13,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-20 11:38:13,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-20 11:38:13,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-20 11:38:13,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-20 11:38:13,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-20 11:38:13,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-02-20 11:38:13,296 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-20 11:38:13,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-20 11:38:13,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-20 11:38:13,298 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-20 11:38:13,406 INFO L244 CfgBuilder]: Building ICFG [2024-02-20 11:38:13,408 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-20 11:38:13,668 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-20 11:38:13,669 INFO L293 CfgBuilder]: Performing block encoding [2024-02-20 11:38:13,851 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-20 11:38:13,851 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-02-20 11:38:13,852 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:38:13 BoogieIcfgContainer [2024-02-20 11:38:13,852 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-20 11:38:13,854 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-20 11:38:13,854 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-20 11:38:13,857 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-20 11:38:13,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 11:38:12" (1/3) ... [2024-02-20 11:38:13,857 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@532cb5b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:38:13, skipping insertion in model container [2024-02-20 11:38:13,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:13" (2/3) ... [2024-02-20 11:38:13,859 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@532cb5b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:38:13, skipping insertion in model container [2024-02-20 11:38:13,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:38:13" (3/3) ... [2024-02-20 11:38:13,860 INFO L112 eAbstractionObserver]: Analyzing ICFG 36-apron_21-traces-cluster-based_true.i [2024-02-20 11:38:13,877 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-20 11:38:13,877 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-02-20 11:38:13,877 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-20 11:38:13,933 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:38:13,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 68 transitions, 148 flow [2024-02-20 11:38:14,005 INFO L124 PetriNetUnfolderBase]: 5/65 cut-off events. [2024-02-20 11:38:14,005 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-20 11:38:14,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 65 events. 5/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 148 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2024-02-20 11:38:14,008 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 68 transitions, 148 flow [2024-02-20 11:38:14,011 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 65 transitions, 139 flow [2024-02-20 11:38:14,018 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:38:14,023 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5c0082e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:38:14,024 INFO L370 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-02-20 11:38:14,031 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:38:14,031 INFO L124 PetriNetUnfolderBase]: 1/32 cut-off events. [2024-02-20 11:38:14,032 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-20 11:38:14,032 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:14,033 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:14,033 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2024-02-20 11:38:14,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:14,037 INFO L85 PathProgramCache]: Analyzing trace with hash -636492636, now seen corresponding path program 1 times [2024-02-20 11:38:14,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:14,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929096430] [2024-02-20 11:38:14,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:14,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:38:14,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:14,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929096430] [2024-02-20 11:38:14,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929096430] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:38:14,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:38:14,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-20 11:38:14,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445151179] [2024-02-20 11:38:14,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:38:14,428 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 11:38:14,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:14,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 11:38:14,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-20 11:38:14,457 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 68 [2024-02-20 11:38:14,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 139 flow. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:14,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:14,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 68 [2024-02-20 11:38:14,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:18,006 INFO L124 PetriNetUnfolderBase]: 30713/46957 cut-off events. [2024-02-20 11:38:18,006 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-02-20 11:38:18,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90086 conditions, 46957 events. 30713/46957 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 1228. Compared 351432 event pairs, 7163 based on Foata normal form. 3860/49773 useless extension candidates. Maximal degree in co-relation 90075. Up to 11332 conditions per place. [2024-02-20 11:38:18,325 INFO L140 encePairwiseOnDemand]: 57/68 looper letters, 190 selfloop transitions, 11 changer transitions 0/220 dead transitions. [2024-02-20 11:38:18,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 220 transitions, 872 flow [2024-02-20 11:38:18,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-20 11:38:18,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-20 11:38:18,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 401 transitions. [2024-02-20 11:38:18,347 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7371323529411765 [2024-02-20 11:38:18,351 INFO L308 CegarLoopForPetriNet]: 70 programPoint places, 7 predicate places. [2024-02-20 11:38:18,351 INFO L507 AbstractCegarLoop]: Abstraction has has 77 places, 220 transitions, 872 flow [2024-02-20 11:38:18,352 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:18,352 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:18,352 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:18,353 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-20 11:38:18,353 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2024-02-20 11:38:18,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:18,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1140138873, now seen corresponding path program 1 times [2024-02-20 11:38:18,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:18,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707039644] [2024-02-20 11:38:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:18,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:18,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:38:18,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:18,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707039644] [2024-02-20 11:38:18,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707039644] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:38:18,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:38:18,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-20 11:38:18,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107091120] [2024-02-20 11:38:18,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:38:18,500 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 11:38:18,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:18,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 11:38:18,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-20 11:38:18,504 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 68 [2024-02-20 11:38:18,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 220 transitions, 872 flow. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:18,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:18,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 68 [2024-02-20 11:38:18,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:24,051 INFO L124 PetriNetUnfolderBase]: 56549/85084 cut-off events. [2024-02-20 11:38:24,052 INFO L125 PetriNetUnfolderBase]: For 18151/18655 co-relation queries the response was YES. [2024-02-20 11:38:24,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234975 conditions, 85084 events. 56549/85084 cut-off events. For 18151/18655 co-relation queries the response was YES. Maximal size of possible extension queue 2265. Compared 660883 event pairs, 6969 based on Foata normal form. 92/82906 useless extension candidates. Maximal degree in co-relation 234961. Up to 32633 conditions per place. [2024-02-20 11:38:24,578 INFO L140 encePairwiseOnDemand]: 57/68 looper letters, 607 selfloop transitions, 69 changer transitions 12/707 dead transitions. [2024-02-20 11:38:24,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 707 transitions, 4200 flow [2024-02-20 11:38:24,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-20 11:38:24,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-20 11:38:24,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 346 transitions. [2024-02-20 11:38:24,580 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6360294117647058 [2024-02-20 11:38:24,581 INFO L308 CegarLoopForPetriNet]: 70 programPoint places, 14 predicate places. [2024-02-20 11:38:24,581 INFO L507 AbstractCegarLoop]: Abstraction has has 84 places, 707 transitions, 4200 flow [2024-02-20 11:38:24,581 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:24,582 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:24,582 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:24,582 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-20 11:38:24,582 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2024-02-20 11:38:24,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:24,583 INFO L85 PathProgramCache]: Analyzing trace with hash -334648776, now seen corresponding path program 1 times [2024-02-20 11:38:24,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:24,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774984093] [2024-02-20 11:38:24,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:24,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:38:24,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:24,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774984093] [2024-02-20 11:38:24,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774984093] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:38:24,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:38:24,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-20 11:38:24,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071065283] [2024-02-20 11:38:24,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:38:24,732 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 11:38:24,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:24,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 11:38:24,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-20 11:38:24,736 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 68 [2024-02-20 11:38:24,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 707 transitions, 4200 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:24,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:24,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 68 [2024-02-20 11:38:24,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:35,687 INFO L124 PetriNetUnfolderBase]: 95821/145064 cut-off events. [2024-02-20 11:38:35,688 INFO L125 PetriNetUnfolderBase]: For 108503/109413 co-relation queries the response was YES. [2024-02-20 11:38:35,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510909 conditions, 145064 events. 95821/145064 cut-off events. For 108503/109413 co-relation queries the response was YES. Maximal size of possible extension queue 3937. Compared 1207804 event pairs, 14241 based on Foata normal form. 281/139782 useless extension candidates. Maximal degree in co-relation 510892. Up to 61652 conditions per place. [2024-02-20 11:38:36,671 INFO L140 encePairwiseOnDemand]: 61/68 looper letters, 1358 selfloop transitions, 96 changer transitions 317/1796 dead transitions. [2024-02-20 11:38:36,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 1796 transitions, 14268 flow [2024-02-20 11:38:36,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-20 11:38:36,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-20 11:38:36,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 363 transitions. [2024-02-20 11:38:36,673 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6672794117647058 [2024-02-20 11:38:36,674 INFO L308 CegarLoopForPetriNet]: 70 programPoint places, 21 predicate places. [2024-02-20 11:38:36,674 INFO L507 AbstractCegarLoop]: Abstraction has has 91 places, 1796 transitions, 14268 flow [2024-02-20 11:38:36,674 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:36,674 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:36,675 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:36,675 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-20 11:38:36,675 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2024-02-20 11:38:36,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:36,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1552708645, now seen corresponding path program 1 times [2024-02-20 11:38:36,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:36,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698313766] [2024-02-20 11:38:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:36,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:38:36,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:36,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698313766] [2024-02-20 11:38:36,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698313766] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:38:36,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:38:36,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 11:38:36,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196607993] [2024-02-20 11:38:36,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:38:36,724 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 11:38:36,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:36,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 11:38:36,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 11:38:36,725 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 68 [2024-02-20 11:38:36,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 1796 transitions, 14268 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:36,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:36,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 68 [2024-02-20 11:38:36,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:50,087 INFO L124 PetriNetUnfolderBase]: 82246/127300 cut-off events. [2024-02-20 11:38:50,087 INFO L125 PetriNetUnfolderBase]: For 199686/199884 co-relation queries the response was YES. [2024-02-20 11:38:50,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545583 conditions, 127300 events. 82246/127300 cut-off events. For 199686/199884 co-relation queries the response was YES. Maximal size of possible extension queue 4176. Compared 1090979 event pairs, 8496 based on Foata normal form. 4893/126248 useless extension candidates. Maximal degree in co-relation 545563. Up to 63148 conditions per place. [2024-02-20 11:38:50,976 INFO L140 encePairwiseOnDemand]: 55/68 looper letters, 1961 selfloop transitions, 518 changer transitions 603/3111 dead transitions. [2024-02-20 11:38:50,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 3111 transitions, 30988 flow [2024-02-20 11:38:50,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 11:38:50,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 11:38:50,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2024-02-20 11:38:50,978 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7352941176470589 [2024-02-20 11:38:50,978 INFO L308 CegarLoopForPetriNet]: 70 programPoint places, 23 predicate places. [2024-02-20 11:38:50,979 INFO L507 AbstractCegarLoop]: Abstraction has has 93 places, 3111 transitions, 30988 flow [2024-02-20 11:38:50,979 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:50,979 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:50,979 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:50,979 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-20 11:38:50,979 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2024-02-20 11:38:50,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:50,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1512821133, now seen corresponding path program 1 times [2024-02-20 11:38:50,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:50,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408011265] [2024-02-20 11:38:50,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:50,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:38:51,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:51,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408011265] [2024-02-20 11:38:51,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408011265] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:38:51,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:38:51,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-20 11:38:51,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652505741] [2024-02-20 11:38:51,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:38:51,080 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 11:38:51,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:51,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 11:38:51,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-02-20 11:38:51,081 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 68 [2024-02-20 11:38:51,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 3111 transitions, 30988 flow. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:51,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:51,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 68 [2024-02-20 11:38:51,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:39:02,456 INFO L124 PetriNetUnfolderBase]: 40268/63769 cut-off events. [2024-02-20 11:39:02,457 INFO L125 PetriNetUnfolderBase]: For 148789/148805 co-relation queries the response was YES. [2024-02-20 11:39:02,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324916 conditions, 63769 events. 40268/63769 cut-off events. For 148789/148805 co-relation queries the response was YES. Maximal size of possible extension queue 1884. Compared 511123 event pairs, 3952 based on Foata normal form. 2195/63633 useless extension candidates. Maximal degree in co-relation 324893. Up to 32220 conditions per place. [2024-02-20 11:39:02,860 INFO L140 encePairwiseOnDemand]: 61/68 looper letters, 2053 selfloop transitions, 229 changer transitions 719/3030 dead transitions. [2024-02-20 11:39:02,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 3030 transitions, 36216 flow [2024-02-20 11:39:02,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-20 11:39:02,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-20 11:39:02,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 160 transitions. [2024-02-20 11:39:02,862 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2024-02-20 11:39:02,862 INFO L308 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2024-02-20 11:39:02,862 INFO L507 AbstractCegarLoop]: Abstraction has has 96 places, 3030 transitions, 36216 flow [2024-02-20 11:39:02,863 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:39:02,863 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:39:02,863 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:39:02,863 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-20 11:39:02,863 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2024-02-20 11:39:02,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:39:02,864 INFO L85 PathProgramCache]: Analyzing trace with hash 763556258, now seen corresponding path program 1 times [2024-02-20 11:39:02,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:39:02,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372870236] [2024-02-20 11:39:02,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:39:02,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:39:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:39:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:39:02,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:39:02,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372870236] [2024-02-20 11:39:02,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372870236] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:39:02,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:39:02,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-20 11:39:02,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352336011] [2024-02-20 11:39:02,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:39:02,932 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-20 11:39:02,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:39:02,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-20 11:39:02,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-02-20 11:39:02,939 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 68 [2024-02-20 11:39:02,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 3030 transitions, 36216 flow. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:39:02,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:39:02,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 68 [2024-02-20 11:39:02,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand