./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_safe-10.i --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 448d4d75 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread/fib_safe-10.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 4d0c5b9355e30d5caa4f24695b56ab4fa8d9d282078ca8b4e24a8f9b8920e450 --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 11:21:35,789 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-20 11:21:35,862 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-20 11:21:35,866 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-20 11:21:35,866 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-20 11:21:35,898 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-20 11:21:35,899 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-20 11:21:35,899 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-20 11:21:35,900 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-20 11:21:35,903 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-20 11:21:35,904 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-20 11:21:35,904 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-20 11:21:35,905 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-20 11:21:35,906 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-20 11:21:35,906 INFO L153 SettingsManager]: * Use SBE=true [2024-02-20 11:21:35,906 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-20 11:21:35,907 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-20 11:21:35,907 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-20 11:21:35,908 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-20 11:21:35,908 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-20 11:21:35,908 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-20 11:21:35,909 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-20 11:21:35,909 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-20 11:21:35,909 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-20 11:21:35,917 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-20 11:21:35,917 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-20 11:21:35,917 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-20 11:21:35,918 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-20 11:21:35,918 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-20 11:21:35,918 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-20 11:21:35,919 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-20 11:21:35,919 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-20 11:21:35,920 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:21:35,920 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-20 11:21:35,920 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-20 11:21:35,920 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-20 11:21:35,920 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-20 11:21:35,921 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-20 11:21:35,921 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-20 11:21:35,921 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-20 11:21:35,921 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-20 11:21:35,921 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-20 11:21:35,922 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-20 11:21:35,922 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d0c5b9355e30d5caa4f24695b56ab4fa8d9d282078ca8b4e24a8f9b8920e450 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-20 11:21:36,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-20 11:21:36,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-20 11:21:36,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-20 11:21:36,166 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-20 11:21:36,166 INFO L274 PluginConnector]: CDTParser initialized [2024-02-20 11:21:36,167 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-10.i [2024-02-20 11:21:37,325 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-20 11:21:37,536 INFO L384 CDTParser]: Found 1 translation units. [2024-02-20 11:21:37,537 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-10.i [2024-02-20 11:21:37,552 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b8124a32/f0629b22ce3342b68c47c75da27405e9/FLAGfcfb10ec5 [2024-02-20 11:21:37,562 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b8124a32/f0629b22ce3342b68c47c75da27405e9 [2024-02-20 11:21:37,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-20 11:21:37,565 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-20 11:21:37,566 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-20 11:21:37,568 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-20 11:21:37,571 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-20 11:21:37,572 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:21:37" (1/1) ... [2024-02-20 11:21:37,573 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@299ae7a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:37, skipping insertion in model container [2024-02-20 11:21:37,573 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:21:37" (1/1) ... [2024-02-20 11:21:37,607 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-20 11:21:37,867 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-10.i[30241,30254] [2024-02-20 11:21:37,892 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:21:37,901 INFO L202 MainTranslator]: Completed pre-run [2024-02-20 11:21:37,942 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-10.i[30241,30254] [2024-02-20 11:21:37,950 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:21:37,981 INFO L206 MainTranslator]: Completed translation [2024-02-20 11:21:37,981 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:37 WrapperNode [2024-02-20 11:21:37,981 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-20 11:21:37,983 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-20 11:21:37,983 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-20 11:21:37,983 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-20 11:21:37,988 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:37" (1/1) ... [2024-02-20 11:21:38,014 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:37" (1/1) ... [2024-02-20 11:21:38,036 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2024-02-20 11:21:38,037 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-20 11:21:38,037 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-20 11:21:38,037 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-20 11:21:38,038 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-20 11:21:38,046 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:37" (1/1) ... [2024-02-20 11:21:38,047 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:37" (1/1) ... [2024-02-20 11:21:38,051 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:37" (1/1) ... [2024-02-20 11:21:38,071 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-02-20 11:21:38,072 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:37" (1/1) ... [2024-02-20 11:21:38,072 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:37" (1/1) ... [2024-02-20 11:21:38,081 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:37" (1/1) ... [2024-02-20 11:21:38,084 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:37" (1/1) ... [2024-02-20 11:21:38,090 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:37" (1/1) ... [2024-02-20 11:21:38,092 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:37" (1/1) ... [2024-02-20 11:21:38,096 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-20 11:21:38,097 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-20 11:21:38,098 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-20 11:21:38,098 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-20 11:21:38,099 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:37" (1/1) ... [2024-02-20 11:21:38,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:21:38,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:21:38,130 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 11:21:38,151 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 11:21:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-02-20 11:21:38,180 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-02-20 11:21:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-02-20 11:21:38,180 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-02-20 11:21:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-20 11:21:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-20 11:21:38,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-20 11:21:38,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-20 11:21:38,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-20 11:21:38,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-20 11:21:38,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-20 11:21:38,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-20 11:21:38,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-20 11:21:38,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-20 11:21:38,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-20 11:21:38,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-20 11:21:38,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-20 11:21:38,185 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 11:21:38,305 INFO L244 CfgBuilder]: Building ICFG [2024-02-20 11:21:38,308 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-20 11:21:38,453 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-20 11:21:38,453 INFO L293 CfgBuilder]: Performing block encoding [2024-02-20 11:21:38,529 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-20 11:21:38,538 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-20 11:21:38,539 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:21:38 BoogieIcfgContainer [2024-02-20 11:21:38,540 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-20 11:21:38,542 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-20 11:21:38,543 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-20 11:21:38,547 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-20 11:21:38,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 11:21:37" (1/3) ... [2024-02-20 11:21:38,548 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6711eff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:21:38, skipping insertion in model container [2024-02-20 11:21:38,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:37" (2/3) ... [2024-02-20 11:21:38,549 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6711eff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:21:38, skipping insertion in model container [2024-02-20 11:21:38,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:21:38" (3/3) ... [2024-02-20 11:21:38,551 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-10.i [2024-02-20 11:21:38,569 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-20 11:21:38,569 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-20 11:21:38,569 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-20 11:21:38,608 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:21:38,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2024-02-20 11:21:38,672 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-02-20 11:21:38,673 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-20 11:21:38,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-02-20 11:21:38,678 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2024-02-20 11:21:38,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2024-02-20 11:21:38,688 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:21:38,693 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;@7efbc79, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:21:38,693 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-20 11:21:38,700 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:21:38,700 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2024-02-20 11:21:38,700 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-20 11:21:38,700 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:38,701 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:21:38,701 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:21:38,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:38,705 INFO L85 PathProgramCache]: Analyzing trace with hash -369539475, now seen corresponding path program 1 times [2024-02-20 11:21:38,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:38,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390930832] [2024-02-20 11:21:38,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:38,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:38,995 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 11:21:38,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:38,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390930832] [2024-02-20 11:21:38,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390930832] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:21:38,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:21:38,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 11:21:38,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402409196] [2024-02-20 11:21:38,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:21:39,005 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 11:21:39,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:21:39,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 11:21:39,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 11:21:39,031 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-02-20 11:21:39,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 11:21:39,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:21:39,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-02-20 11:21:39,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:21:39,105 INFO L124 PetriNetUnfolderBase]: 115/223 cut-off events. [2024-02-20 11:21:39,105 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-20 11:21:39,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 223 events. 115/223 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 689 event pairs, 20 based on Foata normal form. 9/209 useless extension candidates. Maximal degree in co-relation 398. Up to 118 conditions per place. [2024-02-20 11:21:39,108 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 20 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2024-02-20 11:21:39,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 118 flow [2024-02-20 11:21:39,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 11:21:39,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 11:21:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-02-20 11:21:39,119 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2024-02-20 11:21:39,123 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2024-02-20 11:21:39,123 INFO L507 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 118 flow [2024-02-20 11:21:39,123 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 11:21:39,123 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:39,124 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:21:39,124 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-20 11:21:39,124 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:21:39,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:39,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1403763973, now seen corresponding path program 1 times [2024-02-20 11:21:39,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:39,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486719711] [2024-02-20 11:21:39,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:39,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:39,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:39,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:39,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486719711] [2024-02-20 11:21:39,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486719711] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:21:39,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857181169] [2024-02-20 11:21:39,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:39,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:21:39,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:21:39,261 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:21:39,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-20 11:21:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:39,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-20 11:21:39,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:21:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:39,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:21:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:39,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857181169] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:21:39,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:21:39,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-02-20 11:21:39,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740424600] [2024-02-20 11:21:39,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:21:39,418 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-20 11:21:39,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:21:39,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-20 11:21:39,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-02-20 11:21:39,419 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-02-20 11:21:39,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 118 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 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 11:21:39,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:21:39,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-02-20 11:21:39,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:21:39,568 INFO L124 PetriNetUnfolderBase]: 169/306 cut-off events. [2024-02-20 11:21:39,571 INFO L125 PetriNetUnfolderBase]: For 35/65 co-relation queries the response was YES. [2024-02-20 11:21:39,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 835 conditions, 306 events. 169/306 cut-off events. For 35/65 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 909 event pairs, 20 based on Foata normal form. 6/288 useless extension candidates. Maximal degree in co-relation 817. Up to 199 conditions per place. [2024-02-20 11:21:39,578 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 38 selfloop transitions, 5 changer transitions 1/54 dead transitions. [2024-02-20 11:21:39,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 54 transitions, 290 flow [2024-02-20 11:21:39,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-20 11:21:39,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-20 11:21:39,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-02-20 11:21:39,583 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6839080459770115 [2024-02-20 11:21:39,584 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-02-20 11:21:39,584 INFO L507 AbstractCegarLoop]: Abstraction has has 37 places, 54 transitions, 290 flow [2024-02-20 11:21:39,585 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 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 11:21:39,585 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:39,586 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:21:39,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-20 11:21:39,800 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:21:39,801 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:21:39,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:39,801 INFO L85 PathProgramCache]: Analyzing trace with hash -30528403, now seen corresponding path program 2 times [2024-02-20 11:21:39,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:39,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045155238] [2024-02-20 11:21:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:39,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:39,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:39,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045155238] [2024-02-20 11:21:39,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045155238] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:21:39,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718417543] [2024-02-20 11:21:39,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:21:39,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:21:39,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:21:39,956 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:21:39,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-20 11:21:40,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:21:40,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:21:40,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 11:21:40,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:21:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:40,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:21:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:40,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718417543] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:21:40,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:21:40,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-20 11:21:40,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128720829] [2024-02-20 11:21:40,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:21:40,171 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-20 11:21:40,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:21:40,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-20 11:21:40,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-02-20 11:21:40,175 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-02-20 11:21:40,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 54 transitions, 290 flow. Second operand has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 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 11:21:40,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:21:40,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-02-20 11:21:40,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:21:40,332 INFO L124 PetriNetUnfolderBase]: 277/472 cut-off events. [2024-02-20 11:21:40,333 INFO L125 PetriNetUnfolderBase]: For 103/139 co-relation queries the response was YES. [2024-02-20 11:21:40,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1746 conditions, 472 events. 277/472 cut-off events. For 103/139 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1344 event pairs, 20 based on Foata normal form. 18/470 useless extension candidates. Maximal degree in co-relation 1724. Up to 361 conditions per place. [2024-02-20 11:21:40,338 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 74 selfloop transitions, 11 changer transitions 1/96 dead transitions. [2024-02-20 11:21:40,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 96 transitions, 714 flow [2024-02-20 11:21:40,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-20 11:21:40,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-20 11:21:40,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 236 transitions. [2024-02-20 11:21:40,344 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6781609195402298 [2024-02-20 11:21:40,345 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 18 predicate places. [2024-02-20 11:21:40,345 INFO L507 AbstractCegarLoop]: Abstraction has has 48 places, 96 transitions, 714 flow [2024-02-20 11:21:40,346 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 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 11:21:40,346 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:40,346 INFO L234 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:21:40,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-20 11:21:40,574 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-02-20 11:21:40,575 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:21:40,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:40,576 INFO L85 PathProgramCache]: Analyzing trace with hash -246684307, now seen corresponding path program 3 times [2024-02-20 11:21:40,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:40,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596248382] [2024-02-20 11:21:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:40,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:40,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:40,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596248382] [2024-02-20 11:21:40,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596248382] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:21:40,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746859394] [2024-02-20 11:21:40,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:21:40,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:21:40,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:21:40,793 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:21:40,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-20 11:21:40,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-02-20 11:21:40,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:21:40,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-20 11:21:40,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:21:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:40,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:21:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:41,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746859394] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:21:41,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:21:41,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-02-20 11:21:41,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289288601] [2024-02-20 11:21:41,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:21:41,122 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-20 11:21:41,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:21:41,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-20 11:21:41,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-02-20 11:21:41,125 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-02-20 11:21:41,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 96 transitions, 714 flow. Second operand has 25 states, 25 states have (on average 13.28) internal successors, (332), 25 states have internal predecessors, (332), 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 11:21:41,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:21:41,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-02-20 11:21:41,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:21:41,425 INFO L124 PetriNetUnfolderBase]: 493/798 cut-off events. [2024-02-20 11:21:41,426 INFO L125 PetriNetUnfolderBase]: For 218/278 co-relation queries the response was YES. [2024-02-20 11:21:41,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3789 conditions, 798 events. 493/798 cut-off events. For 218/278 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2160 event pairs, 20 based on Foata normal form. 18/795 useless extension candidates. Maximal degree in co-relation 3763. Up to 685 conditions per place. [2024-02-20 11:21:41,432 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 146 selfloop transitions, 23 changer transitions 1/180 dead transitions. [2024-02-20 11:21:41,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 180 transitions, 1726 flow [2024-02-20 11:21:41,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-20 11:21:41,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-20 11:21:41,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 470 transitions. [2024-02-20 11:21:41,434 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6752873563218391 [2024-02-20 11:21:41,436 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2024-02-20 11:21:41,436 INFO L507 AbstractCegarLoop]: Abstraction has has 71 places, 180 transitions, 1726 flow [2024-02-20 11:21:41,436 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 13.28) internal successors, (332), 25 states have internal predecessors, (332), 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 11:21:41,436 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:41,436 INFO L234 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:21:41,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-20 11:21:41,647 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:21:41,648 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:21:41,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:41,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1697966227, now seen corresponding path program 4 times [2024-02-20 11:21:41,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:41,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487752342] [2024-02-20 11:21:41,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:41,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:43,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:43,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487752342] [2024-02-20 11:21:43,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487752342] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:21:43,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338001083] [2024-02-20 11:21:43,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:21:43,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:21:43,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:21:43,064 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:21:43,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-20 11:21:43,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:21:43,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:21:43,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 77 conjunts are in the unsatisfiable core [2024-02-20 11:21:43,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:21:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 210 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:44,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:21:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:45,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338001083] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:21:45,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:21:45,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 84 [2024-02-20 11:21:45,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651569657] [2024-02-20 11:21:45,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:21:45,603 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-02-20 11:21:45,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:21:45,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-02-20 11:21:45,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1045, Invalid=6095, Unknown=0, NotChecked=0, Total=7140 [2024-02-20 11:21:45,818 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-20 11:21:45,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 180 transitions, 1726 flow. Second operand has 85 states, 85 states have (on average 6.2) internal successors, (527), 85 states have internal predecessors, (527), 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 11:21:45,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:21:45,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-20 11:21:45,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:22:23,346 INFO L124 PetriNetUnfolderBase]: 33259/53719 cut-off events. [2024-02-20 11:22:23,346 INFO L125 PetriNetUnfolderBase]: For 99261/99261 co-relation queries the response was YES. [2024-02-20 11:22:23,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253937 conditions, 53719 events. 33259/53719 cut-off events. For 99261/99261 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 362106 event pairs, 68 based on Foata normal form. 0/52704 useless extension candidates. Maximal degree in co-relation 253905. Up to 35848 conditions per place. [2024-02-20 11:22:23,924 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 5438 selfloop transitions, 1265 changer transitions 1148/7854 dead transitions. [2024-02-20 11:22:23,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 7854 transitions, 88529 flow [2024-02-20 11:22:23,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 265 states. [2024-02-20 11:22:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2024-02-20 11:22:23,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 3643 transitions. [2024-02-20 11:22:23,943 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.47404033832140535 [2024-02-20 11:22:23,945 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 305 predicate places. [2024-02-20 11:22:23,945 INFO L507 AbstractCegarLoop]: Abstraction has has 335 places, 7854 transitions, 88529 flow [2024-02-20 11:22:23,946 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 6.2) internal successors, (527), 85 states have internal predecessors, (527), 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 11:22:23,946 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:22:23,946 INFO L234 CegarLoopForPetriNet]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:22:23,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-20 11:22:24,158 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:22:24,158 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:22:24,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:22:24,159 INFO L85 PathProgramCache]: Analyzing trace with hash -2082053563, now seen corresponding path program 1 times [2024-02-20 11:22:24,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:22:24,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288445721] [2024-02-20 11:22:24,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:22:24,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:22:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:22:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:22:25,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:22:25,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288445721] [2024-02-20 11:22:25,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288445721] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:22:25,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990431125] [2024-02-20 11:22:25,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:22:25,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:22:25,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:22:25,368 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:22:25,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-20 11:22:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:22:25,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 79 conjunts are in the unsatisfiable core [2024-02-20 11:22:25,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:22:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 210 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:22:26,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:22:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:22:28,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990431125] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:22:28,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:22:28,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 91 [2024-02-20 11:22:28,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896502562] [2024-02-20 11:22:28,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:22:28,368 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-02-20 11:22:28,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:22:28,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-02-20 11:22:28,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1101, Invalid=7271, Unknown=0, NotChecked=0, Total=8372 [2024-02-20 11:22:28,496 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-20 11:22:28,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 7854 transitions, 88529 flow. Second operand has 92 states, 92 states have (on average 6.239130434782608) internal successors, (574), 92 states have internal predecessors, (574), 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 11:22:28,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:22:28,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-20 11:22:28,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand