./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:09:41,765 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:09:41,851 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:09:41,859 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:09:41,859 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:09:41,888 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:09:41,889 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:09:41,889 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:09:41,889 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:09:41,890 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:09:41,890 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:09:41,890 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:09:41,891 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:09:41,891 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:09:41,891 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:09:41,894 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:09:41,896 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:09:41,898 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:09:41,899 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:09:41,899 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:09:41,900 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:09:41,900 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:09:41,900 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:09:41,901 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:09:41,901 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:09:41,901 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:09:41,901 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:09:41,902 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:09:41,902 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:09:41,902 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:09:41,903 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:09:41,903 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:09:41,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:09:41,904 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:09:41,904 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:09:41,904 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:09:41,904 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:09:41,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:09:41,905 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:09:41,905 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:09:41,905 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:09:41,905 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:09:41,905 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:09:41,905 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 [2024-06-27 17:09:42,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:09:42,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:09:42,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:09:42,240 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:09:42,240 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:09:42,241 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c [2024-06-27 17:09:43,413 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:09:43,599 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:09:43,600 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c [2024-06-27 17:09:43,609 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd657a83a/93c822562e27410e8c46f1f0f52dd4f9/FLAGb9446191d [2024-06-27 17:09:43,624 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd657a83a/93c822562e27410e8c46f1f0f52dd4f9 [2024-06-27 17:09:43,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:09:43,627 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 17:09:43,630 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:09:43,630 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:09:43,635 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:09:43,636 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:09:43" (1/1) ... [2024-06-27 17:09:43,636 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7528271c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:09:43, skipping insertion in model container [2024-06-27 17:09:43,637 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:09:43" (1/1) ... [2024-06-27 17:09:43,655 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:09:43,806 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c[2454,2467] [2024-06-27 17:09:43,823 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:09:43,830 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 17:09:43,859 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c[2454,2467] [2024-06-27 17:09:43,863 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:09:43,883 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:09:43,884 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:09:43 WrapperNode [2024-06-27 17:09:43,884 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:09:43,885 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:09:43,885 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:09:43,885 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:09:43,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:09:43" (1/1) ... [2024-06-27 17:09:43,908 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:09:43" (1/1) ... [2024-06-27 17:09:43,927 INFO L138 Inliner]: procedures = 23, calls = 22, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 127 [2024-06-27 17:09:43,928 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:09:43,928 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:09:43,928 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:09:43,929 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:09:43,939 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:09:43" (1/1) ... [2024-06-27 17:09:43,939 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:09:43" (1/1) ... [2024-06-27 17:09:43,941 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:09:43" (1/1) ... [2024-06-27 17:09:43,953 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-06-27 17:09:43,953 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:09:43" (1/1) ... [2024-06-27 17:09:43,953 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:09:43" (1/1) ... [2024-06-27 17:09:43,958 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:09:43" (1/1) ... [2024-06-27 17:09:43,963 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:09:43" (1/1) ... [2024-06-27 17:09:43,964 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:09:43" (1/1) ... [2024-06-27 17:09:43,966 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:09:43" (1/1) ... [2024-06-27 17:09:43,968 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:09:43,972 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:09:43,972 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:09:43,972 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:09:43,973 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:09:43" (1/1) ... [2024-06-27 17:09:43,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:09:43,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:09:43,997 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) [2024-06-27 17:09:43,999 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 [2024-06-27 17:09:44,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:09:44,050 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 17:09:44,050 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 17:09:44,050 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 17:09:44,051 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 17:09:44,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:09:44,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 17:09:44,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 17:09:44,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 17:09:44,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 17:09:44,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:09:44,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:09:44,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 17:09:44,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 17:09:44,054 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:09:44,145 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:09:44,147 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:09:44,411 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:09:44,411 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:09:44,608 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:09:44,609 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 17:09:44,609 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:09:44 BoogieIcfgContainer [2024-06-27 17:09:44,609 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:09:44,612 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:09:44,612 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:09:44,615 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:09:44,615 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:09:43" (1/3) ... [2024-06-27 17:09:44,615 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d88acc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:09:44, skipping insertion in model container [2024-06-27 17:09:44,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:09:43" (2/3) ... [2024-06-27 17:09:44,616 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d88acc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:09:44, skipping insertion in model container [2024-06-27 17:09:44,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:09:44" (3/3) ... [2024-06-27 17:09:44,617 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2024-06-27 17:09:44,624 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 17:09:44,633 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:09:44,633 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 17:09:44,633 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:09:44,687 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 17:09:44,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-06-27 17:09:44,747 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-06-27 17:09:44,749 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:09:44,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-06-27 17:09:44,753 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-06-27 17:09:44,756 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-06-27 17:09:44,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:09:44,768 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@47dd8824, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:09:44,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 17:09:44,776 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:09:44,776 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-06-27 17:09:44,776 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:09:44,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:09:44,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:09:44,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:09:44,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:09:44,782 INFO L85 PathProgramCache]: Analyzing trace with hash 31457249, now seen corresponding path program 1 times [2024-06-27 17:09:44,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:09:44,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094166141] [2024-06-27 17:09:44,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:09:44,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:09:44,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:09:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:09:45,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:09:45,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094166141] [2024-06-27 17:09:45,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094166141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:09:45,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:09:45,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:09:45,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393216262] [2024-06-27 17:09:45,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:09:45,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:09:45,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:09:45,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:09:45,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:09:45,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:09:45,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2024-06-27 17:09:45,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:09:45,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:09:45,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:09:45,355 INFO L124 PetriNetUnfolderBase]: 69/125 cut-off events. [2024-06-27 17:09:45,355 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-06-27 17:09:45,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 125 events. 69/125 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 326 event pairs, 22 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 220. Up to 72 conditions per place. [2024-06-27 17:09:45,359 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 23 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2024-06-27 17:09:45,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 131 flow [2024-06-27 17:09:45,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:09:45,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:09:45,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2024-06-27 17:09:45,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-27 17:09:45,378 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 37 transitions. [2024-06-27 17:09:45,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 131 flow [2024-06-27 17:09:45,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 28 transitions, 117 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:09:45,384 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2024-06-27 17:09:45,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2024-06-27 17:09:45,390 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-06-27 17:09:45,391 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2024-06-27 17:09:45,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2024-06-27 17:09:45,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:09:45,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:09:45,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:09:45,392 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:09:45,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:09:45,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1501747382, now seen corresponding path program 1 times [2024-06-27 17:09:45,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:09:45,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660871240] [2024-06-27 17:09:45,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:09:45,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:09:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:09:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:09:45,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:09:45,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660871240] [2024-06-27 17:09:45,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660871240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:09:45,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:09:45,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:09:45,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622964480] [2024-06-27 17:09:45,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:09:45,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:09:45,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:09:45,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:09:45,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:09:45,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:09:45,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:09:45,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:09:45,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:09:45,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:09:45,631 INFO L124 PetriNetUnfolderBase]: 69/126 cut-off events. [2024-06-27 17:09:45,632 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-27 17:09:45,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 126 events. 69/126 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 299 event pairs, 44 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 110. Up to 125 conditions per place. [2024-06-27 17:09:45,637 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 17 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2024-06-27 17:09:45,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 97 flow [2024-06-27 17:09:45,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:09:45,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:09:45,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2024-06-27 17:09:45,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 17:09:45,641 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 3 states and 27 transitions. [2024-06-27 17:09:45,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 97 flow [2024-06-27 17:09:45,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 20 transitions, 94 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:09:45,643 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 66 flow [2024-06-27 17:09:45,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2024-06-27 17:09:45,645 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2024-06-27 17:09:45,645 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 66 flow [2024-06-27 17:09:45,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:09:45,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:09:45,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:09:45,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:09:45,647 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:09:45,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:09:45,650 INFO L85 PathProgramCache]: Analyzing trace with hash -378629088, now seen corresponding path program 1 times [2024-06-27 17:09:45,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:09:45,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746555804] [2024-06-27 17:09:45,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:09:45,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:09:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:09:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:09:45,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:09:45,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746555804] [2024-06-27 17:09:45,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746555804] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:09:45,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448164307] [2024-06-27 17:09:45,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:09:45,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:09:45,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:09:45,904 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) [2024-06-27 17:09:45,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 17:09:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:09:46,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 17:09:46,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:09:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:09:46,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:09:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:09:46,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448164307] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 17:09:46,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 17:09:46,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2024-06-27 17:09:46,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373566290] [2024-06-27 17:09:46,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:09:46,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:09:46,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:09:46,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:09:46,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:09:46,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:09:46,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2024-06-27 17:09:46,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:09:46,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:09:46,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:09:46,281 INFO L124 PetriNetUnfolderBase]: 76/138 cut-off events. [2024-06-27 17:09:46,282 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-06-27 17:09:46,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 138 events. 76/138 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 364 event pairs, 22 based on Foata normal form. 5/142 useless extension candidates. Maximal degree in co-relation 317. Up to 71 conditions per place. [2024-06-27 17:09:46,283 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 28 selfloop transitions, 4 changer transitions 1/34 dead transitions. [2024-06-27 17:09:46,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 34 transitions, 168 flow [2024-06-27 17:09:46,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:09:46,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:09:46,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2024-06-27 17:09:46,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-27 17:09:46,285 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 66 flow. Second operand 4 states and 45 transitions. [2024-06-27 17:09:46,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 34 transitions, 168 flow [2024-06-27 17:09:46,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 34 transitions, 164 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 17:09:46,286 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 88 flow [2024-06-27 17:09:46,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2024-06-27 17:09:46,287 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2024-06-27 17:09:46,287 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 88 flow [2024-06-27 17:09:46,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2024-06-27 17:09:46,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:09:46,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:09:46,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 17:09:46,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:09:46,511 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:09:46,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:09:46,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1991583757, now seen corresponding path program 1 times [2024-06-27 17:09:46,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:09:46,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918366551] [2024-06-27 17:09:46,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:09:46,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:09:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:09:46,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:09:46,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:09:46,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918366551] [2024-06-27 17:09:46,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918366551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:09:46,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:09:46,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:09:46,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657738607] [2024-06-27 17:09:46,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:09:46,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:09:46,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:09:46,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:09:46,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:09:46,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:09:46,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:09:46,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:09:46,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:09:46,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:09:46,800 INFO L124 PetriNetUnfolderBase]: 85/167 cut-off events. [2024-06-27 17:09:46,801 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2024-06-27 17:09:46,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 167 events. 85/167 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 560 event pairs, 24 based on Foata normal form. 9/175 useless extension candidates. Maximal degree in co-relation 442. Up to 93 conditions per place. [2024-06-27 17:09:46,807 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 31 selfloop transitions, 4 changer transitions 7/43 dead transitions. [2024-06-27 17:09:46,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 43 transitions, 243 flow [2024-06-27 17:09:46,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:09:46,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:09:46,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2024-06-27 17:09:46,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-06-27 17:09:46,812 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 88 flow. Second operand 5 states and 53 transitions. [2024-06-27 17:09:46,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 43 transitions, 243 flow [2024-06-27 17:09:46,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 43 transitions, 238 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 17:09:46,817 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 115 flow [2024-06-27 17:09:46,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2024-06-27 17:09:46,819 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2024-06-27 17:09:46,819 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 115 flow [2024-06-27 17:09:46,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:09:46,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:09:46,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:09:46,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:09:46,821 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:09:46,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:09:46,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1404008911, now seen corresponding path program 2 times [2024-06-27 17:09:46,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:09:46,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837319745] [2024-06-27 17:09:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:09:46,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:09:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:09:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:09:46,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:09:46,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837319745] [2024-06-27 17:09:46,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837319745] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:09:46,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383100] [2024-06-27 17:09:46,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:09:46,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:09:46,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:09:46,948 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) [2024-06-27 17:09:46,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 17:09:47,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:09:47,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:09:47,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 17:09:47,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:09:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:09:47,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:09:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:09:47,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383100] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 17:09:47,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 17:09:47,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2024-06-27 17:09:47,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169246453] [2024-06-27 17:09:47,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:09:47,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:09:47,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:09:47,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:09:47,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:09:47,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:09:47,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2024-06-27 17:09:47,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:09:47,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:09:47,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:09:47,196 INFO L124 PetriNetUnfolderBase]: 87/166 cut-off events. [2024-06-27 17:09:47,196 INFO L125 PetriNetUnfolderBase]: For 189/189 co-relation queries the response was YES. [2024-06-27 17:09:47,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 166 events. 87/166 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 498 event pairs, 25 based on Foata normal form. 4/169 useless extension candidates. Maximal degree in co-relation 550. Up to 103 conditions per place. [2024-06-27 17:09:47,198 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 28 selfloop transitions, 4 changer transitions 3/36 dead transitions. [2024-06-27 17:09:47,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 36 transitions, 234 flow [2024-06-27 17:09:47,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:09:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:09:47,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-06-27 17:09:47,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 17:09:47,199 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 115 flow. Second operand 4 states and 44 transitions. [2024-06-27 17:09:47,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 36 transitions, 234 flow [2024-06-27 17:09:47,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 221 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 17:09:47,202 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 134 flow [2024-06-27 17:09:47,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2024-06-27 17:09:47,204 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2024-06-27 17:09:47,204 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 134 flow [2024-06-27 17:09:47,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2024-06-27 17:09:47,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:09:47,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:09:47,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 17:09:47,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:09:47,420 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:09:47,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:09:47,421 INFO L85 PathProgramCache]: Analyzing trace with hash 974715616, now seen corresponding path program 2 times [2024-06-27 17:09:47,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:09:47,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770696681] [2024-06-27 17:09:47,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:09:47,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:09:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:09:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:09:47,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:09:47,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770696681] [2024-06-27 17:09:47,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770696681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:09:47,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:09:47,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:09:47,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096774941] [2024-06-27 17:09:47,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:09:47,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:09:47,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:09:47,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:09:47,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:09:47,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:09:47,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:09:47,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:09:47,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:09:47,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:09:47,635 INFO L124 PetriNetUnfolderBase]: 96/186 cut-off events. [2024-06-27 17:09:47,635 INFO L125 PetriNetUnfolderBase]: For 290/290 co-relation queries the response was YES. [2024-06-27 17:09:47,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 186 events. 96/186 cut-off events. For 290/290 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 613 event pairs, 24 based on Foata normal form. 2/187 useless extension candidates. Maximal degree in co-relation 637. Up to 99 conditions per place. [2024-06-27 17:09:47,637 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 31 selfloop transitions, 9 changer transitions 9/50 dead transitions. [2024-06-27 17:09:47,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 343 flow [2024-06-27 17:09:47,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:09:47,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:09:47,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2024-06-27 17:09:47,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 17:09:47,640 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 134 flow. Second operand 6 states and 60 transitions. [2024-06-27 17:09:47,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 343 flow [2024-06-27 17:09:47,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 50 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:09:47,645 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 191 flow [2024-06-27 17:09:47,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=191, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2024-06-27 17:09:47,648 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2024-06-27 17:09:47,648 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 191 flow [2024-06-27 17:09:47,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:09:47,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:09:47,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:09:47,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:09:47,649 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:09:47,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:09:47,649 INFO L85 PathProgramCache]: Analyzing trace with hash -467283696, now seen corresponding path program 3 times [2024-06-27 17:09:47,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:09:47,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951205674] [2024-06-27 17:09:47,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:09:47,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:09:47,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:09:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:09:47,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:09:47,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951205674] [2024-06-27 17:09:47,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951205674] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:09:47,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733532605] [2024-06-27 17:09:47,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:09:47,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:09:47,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:09:47,749 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) [2024-06-27 17:09:47,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 17:09:47,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:09:47,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:09:47,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 17:09:47,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:09:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:09:47,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:09:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:09:47,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733532605] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:09:47,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:09:47,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-06-27 17:09:47,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204284505] [2024-06-27 17:09:47,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:09:47,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:09:47,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:09:47,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:09:47,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:09:47,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:09:47,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 191 flow. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 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) [2024-06-27 17:09:47,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:09:47,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:09:47,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:09:48,000 INFO L124 PetriNetUnfolderBase]: 106/205 cut-off events. [2024-06-27 17:09:48,000 INFO L125 PetriNetUnfolderBase]: For 453/453 co-relation queries the response was YES. [2024-06-27 17:09:48,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 205 events. 106/205 cut-off events. For 453/453 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 650 event pairs, 35 based on Foata normal form. 5/209 useless extension candidates. Maximal degree in co-relation 808. Up to 133 conditions per place. [2024-06-27 17:09:48,002 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 33 selfloop transitions, 13 changer transitions 3/50 dead transitions. [2024-06-27 17:09:48,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 403 flow [2024-06-27 17:09:48,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:09:48,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:09:48,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2024-06-27 17:09:48,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-06-27 17:09:48,005 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 191 flow. Second operand 5 states and 53 transitions. [2024-06-27 17:09:48,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 403 flow [2024-06-27 17:09:48,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 381 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 17:09:48,009 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 275 flow [2024-06-27 17:09:48,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=275, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2024-06-27 17:09:48,009 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2024-06-27 17:09:48,010 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 275 flow [2024-06-27 17:09:48,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 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) [2024-06-27 17:09:48,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:09:48,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:09:48,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 17:09:48,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:09:48,225 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:09:48,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:09:48,225 INFO L85 PathProgramCache]: Analyzing trace with hash 118611649, now seen corresponding path program 3 times [2024-06-27 17:09:48,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:09:48,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405652818] [2024-06-27 17:09:48,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:09:48,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:09:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:09:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:09:48,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:09:48,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405652818] [2024-06-27 17:09:48,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405652818] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:09:48,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305882005] [2024-06-27 17:09:48,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:09:48,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:09:48,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:09:48,392 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) [2024-06-27 17:09:48,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 17:09:48,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:09:48,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:09:48,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 17:09:48,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:09:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:09:48,488 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 17:09:48,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305882005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:09:48,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 17:09:48,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-06-27 17:09:48,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527854722] [2024-06-27 17:09:48,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:09:48,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:09:48,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:09:48,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:09:48,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:09:48,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:09:48,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 275 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:09:48,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:09:48,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:09:48,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:09:48,577 INFO L124 PetriNetUnfolderBase]: 107/201 cut-off events. [2024-06-27 17:09:48,577 INFO L125 PetriNetUnfolderBase]: For 568/568 co-relation queries the response was YES. [2024-06-27 17:09:48,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 924 conditions, 201 events. 107/201 cut-off events. For 568/568 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 627 event pairs, 31 based on Foata normal form. 4/204 useless extension candidates. Maximal degree in co-relation 896. Up to 136 conditions per place. [2024-06-27 17:09:48,580 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 30 selfloop transitions, 13 changer transitions 3/47 dead transitions. [2024-06-27 17:09:48,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 429 flow [2024-06-27 17:09:48,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:09:48,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:09:48,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 49 transitions. [2024-06-27 17:09:48,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-06-27 17:09:48,581 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 275 flow. Second operand 5 states and 49 transitions. [2024-06-27 17:09:48,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 429 flow [2024-06-27 17:09:48,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 410 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-27 17:09:48,585 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 304 flow [2024-06-27 17:09:48,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2024-06-27 17:09:48,587 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2024-06-27 17:09:48,587 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 304 flow [2024-06-27 17:09:48,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:09:48,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:09:48,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:09:48,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 17:09:48,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:09:48,801 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:09:48,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:09:48,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1262070008, now seen corresponding path program 4 times [2024-06-27 17:09:48,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:09:48,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751284150] [2024-06-27 17:09:48,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:09:48,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:09:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:09:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:09:48,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:09:48,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751284150] [2024-06-27 17:09:48,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751284150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:09:48,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:09:48,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:09:48,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177080926] [2024-06-27 17:09:48,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:09:48,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:09:48,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:09:48,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:09:48,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:09:48,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:09:48,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 36 transitions, 304 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:09:48,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:09:48,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:09:48,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:09:48,969 INFO L124 PetriNetUnfolderBase]: 94/170 cut-off events. [2024-06-27 17:09:48,969 INFO L125 PetriNetUnfolderBase]: For 694/694 co-relation queries the response was YES. [2024-06-27 17:09:48,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 819 conditions, 170 events. 94/170 cut-off events. For 694/694 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 475 event pairs, 29 based on Foata normal form. 4/173 useless extension candidates. Maximal degree in co-relation 790. Up to 122 conditions per place. [2024-06-27 17:09:48,971 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 30 selfloop transitions, 9 changer transitions 4/44 dead transitions. [2024-06-27 17:09:48,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 433 flow [2024-06-27 17:09:48,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:09:48,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:09:48,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 43 transitions. [2024-06-27 17:09:48,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-27 17:09:48,972 INFO L175 Difference]: Start difference. First operand has 48 places, 36 transitions, 304 flow. Second operand 5 states and 43 transitions. [2024-06-27 17:09:48,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 433 flow [2024-06-27 17:09:48,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 44 transitions, 399 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 17:09:48,976 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 307 flow [2024-06-27 17:09:48,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2024-06-27 17:09:48,977 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2024-06-27 17:09:48,977 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 307 flow [2024-06-27 17:09:48,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:09:48,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:09:48,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:09:48,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:09:48,978 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:09:48,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:09:48,979 INFO L85 PathProgramCache]: Analyzing trace with hash -494164500, now seen corresponding path program 1 times [2024-06-27 17:09:48,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:09:48,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392923383] [2024-06-27 17:09:48,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:09:48,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:09:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:09:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:09:49,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:09:49,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392923383] [2024-06-27 17:09:49,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392923383] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:09:49,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075231758] [2024-06-27 17:09:49,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:09:49,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:09:49,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:09:49,058 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) [2024-06-27 17:09:49,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 17:09:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:09:49,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-27 17:09:49,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:09:49,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 17:09:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:09:49,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:09:49,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-06-27 17:09:49,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:09:49,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 188 [2024-06-27 17:09:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:09:51,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075231758] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:09:51,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:09:51,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2024-06-27 17:09:51,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132149770] [2024-06-27 17:09:51,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:09:51,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 17:09:51,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:09:51,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 17:09:51,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-06-27 17:09:51,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:09:51,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 307 flow. Second operand has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 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) [2024-06-27 17:09:51,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:09:51,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:09:51,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:09:52,116 INFO L124 PetriNetUnfolderBase]: 289/511 cut-off events. [2024-06-27 17:09:52,116 INFO L125 PetriNetUnfolderBase]: For 1631/1631 co-relation queries the response was YES. [2024-06-27 17:09:52,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2430 conditions, 511 events. 289/511 cut-off events. For 1631/1631 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1943 event pairs, 20 based on Foata normal form. 26/535 useless extension candidates. Maximal degree in co-relation 2367. Up to 225 conditions per place. [2024-06-27 17:09:52,122 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 57 selfloop transitions, 31 changer transitions 55/144 dead transitions. [2024-06-27 17:09:52,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 144 transitions, 1337 flow [2024-06-27 17:09:52,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 17:09:52,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 17:09:52,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 183 transitions. [2024-06-27 17:09:52,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575 [2024-06-27 17:09:52,124 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 307 flow. Second operand 20 states and 183 transitions. [2024-06-27 17:09:52,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 144 transitions, 1337 flow [2024-06-27 17:09:52,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 144 transitions, 1235 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 17:09:52,134 INFO L231 Difference]: Finished difference. Result has 71 places, 52 transitions, 537 flow [2024-06-27 17:09:52,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=537, PETRI_PLACES=71, PETRI_TRANSITIONS=52} [2024-06-27 17:09:52,135 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 50 predicate places. [2024-06-27 17:09:52,135 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 52 transitions, 537 flow [2024-06-27 17:09:52,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 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) [2024-06-27 17:09:52,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:09:52,136 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:09:52,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-06-27 17:09:52,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-06-27 17:09:52,352 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:09:52,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:09:52,353 INFO L85 PathProgramCache]: Analyzing trace with hash 554196629, now seen corresponding path program 2 times [2024-06-27 17:09:52,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:09:52,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736192367] [2024-06-27 17:09:52,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:09:52,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:09:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:09:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:09:53,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:09:53,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736192367] [2024-06-27 17:09:53,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736192367] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:09:53,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017536180] [2024-06-27 17:09:53,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:09:53,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:09:53,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:09:53,314 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:09:53,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 17:09:53,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:09:53,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:09:53,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 17:09:53,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:09:53,516 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:09:53,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2024-06-27 17:09:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:09:53,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:09:53,617 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-06-27 17:09:53,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-06-27 17:09:53,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 17:09:53,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017536180] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:09:53,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:09:53,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 14 [2024-06-27 17:09:53,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061858880] [2024-06-27 17:09:53,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:09:53,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 17:09:53,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:09:53,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 17:09:53,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-06-27 17:09:53,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:09:53,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 52 transitions, 537 flow. Second operand has 15 states, 15 states have (on average 5.8) internal successors, (87), 15 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) [2024-06-27 17:09:53,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:09:53,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:09:53,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:09:53,997 INFO L124 PetriNetUnfolderBase]: 250/451 cut-off events. [2024-06-27 17:09:53,997 INFO L125 PetriNetUnfolderBase]: For 2431/2431 co-relation queries the response was YES. [2024-06-27 17:09:54,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2521 conditions, 451 events. 250/451 cut-off events. For 2431/2431 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1635 event pairs, 43 based on Foata normal form. 1/450 useless extension candidates. Maximal degree in co-relation 2470. Up to 302 conditions per place. [2024-06-27 17:09:54,003 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 70 selfloop transitions, 30 changer transitions 1/102 dead transitions. [2024-06-27 17:09:54,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 102 transitions, 1132 flow [2024-06-27 17:09:54,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 17:09:54,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 17:09:54,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 108 transitions. [2024-06-27 17:09:54,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153846153846154 [2024-06-27 17:09:54,004 INFO L175 Difference]: Start difference. First operand has 71 places, 52 transitions, 537 flow. Second operand 13 states and 108 transitions. [2024-06-27 17:09:54,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 102 transitions, 1132 flow [2024-06-27 17:09:54,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 102 transitions, 989 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-27 17:09:54,016 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 703 flow [2024-06-27 17:09:54,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=703, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2024-06-27 17:09:54,017 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 50 predicate places. [2024-06-27 17:09:54,017 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 703 flow [2024-06-27 17:09:54,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.8) internal successors, (87), 15 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) [2024-06-27 17:09:54,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:09:54,017 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:09:54,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 17:09:54,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:09:54,231 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:09:54,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:09:54,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1090886373, now seen corresponding path program 3 times [2024-06-27 17:09:54,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:09:54,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938463792] [2024-06-27 17:09:54,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:09:54,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:09:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:09:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:09:54,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:09:54,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938463792] [2024-06-27 17:09:54,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938463792] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:09:54,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583378088] [2024-06-27 17:09:54,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:09:54,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:09:54,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:09:54,964 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:09:54,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 17:09:55,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:09:55,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:09:55,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-27 17:09:55,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:09:55,205 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:09:55,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2024-06-27 17:09:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:09:55,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:09:55,297 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-06-27 17:09:55,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-06-27 17:09:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:09:55,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583378088] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:09:55,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:09:55,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 4] total 15 [2024-06-27 17:09:55,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119396355] [2024-06-27 17:09:55,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:09:55,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 17:09:55,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:09:55,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 17:09:55,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-06-27 17:09:55,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:09:55,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 703 flow. Second operand has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 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) [2024-06-27 17:09:55,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:09:55,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:09:55,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:09:55,724 INFO L124 PetriNetUnfolderBase]: 334/600 cut-off events. [2024-06-27 17:09:55,724 INFO L125 PetriNetUnfolderBase]: For 2773/2773 co-relation queries the response was YES. [2024-06-27 17:09:55,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3182 conditions, 600 events. 334/600 cut-off events. For 2773/2773 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2382 event pairs, 62 based on Foata normal form. 1/600 useless extension candidates. Maximal degree in co-relation 2748. Up to 416 conditions per place. [2024-06-27 17:09:55,730 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 84 selfloop transitions, 34 changer transitions 1/120 dead transitions. [2024-06-27 17:09:55,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 120 transitions, 1345 flow [2024-06-27 17:09:55,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 17:09:55,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 17:09:55,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 115 transitions. [2024-06-27 17:09:55,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 17:09:55,732 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 703 flow. Second operand 14 states and 115 transitions. [2024-06-27 17:09:55,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 120 transitions, 1345 flow [2024-06-27 17:09:55,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 120 transitions, 1265 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-27 17:09:55,743 INFO L231 Difference]: Finished difference. Result has 83 places, 84 transitions, 924 flow [2024-06-27 17:09:55,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=924, PETRI_PLACES=83, PETRI_TRANSITIONS=84} [2024-06-27 17:09:55,744 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 62 predicate places. [2024-06-27 17:09:55,744 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 84 transitions, 924 flow [2024-06-27 17:09:55,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 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) [2024-06-27 17:09:55,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:09:55,745 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:09:55,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-06-27 17:09:55,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:09:55,960 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:09:55,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:09:55,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1057878200, now seen corresponding path program 4 times [2024-06-27 17:09:55,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:09:55,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82204025] [2024-06-27 17:09:55,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:09:55,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:09:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:09:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:09:56,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:09:56,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82204025] [2024-06-27 17:09:56,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82204025] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:09:56,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076293827] [2024-06-27 17:09:56,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:09:56,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:09:56,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:09:56,104 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:09:56,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 17:09:56,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:09:56,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:09:56,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:09:56,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:09:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:09:56,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:09:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:09:56,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076293827] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:09:56,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:09:56,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-06-27 17:09:56,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148756592] [2024-06-27 17:09:56,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:09:56,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 17:09:56,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:09:56,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 17:09:56,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-06-27 17:09:56,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:09:56,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 84 transitions, 924 flow. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 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) [2024-06-27 17:09:56,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:09:56,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:09:56,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:09:57,790 INFO L124 PetriNetUnfolderBase]: 527/956 cut-off events. [2024-06-27 17:09:57,790 INFO L125 PetriNetUnfolderBase]: For 4412/4412 co-relation queries the response was YES. [2024-06-27 17:09:57,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5049 conditions, 956 events. 527/956 cut-off events. For 4412/4412 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4393 event pairs, 69 based on Foata normal form. 10/966 useless extension candidates. Maximal degree in co-relation 4607. Up to 329 conditions per place. [2024-06-27 17:09:57,799 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 120 selfloop transitions, 42 changer transitions 0/163 dead transitions. [2024-06-27 17:09:57,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 163 transitions, 1947 flow [2024-06-27 17:09:57,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:09:57,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:09:57,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-27 17:09:57,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136363636363637 [2024-06-27 17:09:57,801 INFO L175 Difference]: Start difference. First operand has 83 places, 84 transitions, 924 flow. Second operand 11 states and 113 transitions. [2024-06-27 17:09:57,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 163 transitions, 1947 flow [2024-06-27 17:09:57,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 163 transitions, 1752 flow, removed 86 selfloop flow, removed 6 redundant places. [2024-06-27 17:09:57,816 INFO L231 Difference]: Finished difference. Result has 94 places, 103 transitions, 1175 flow [2024-06-27 17:09:57,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1175, PETRI_PLACES=94, PETRI_TRANSITIONS=103} [2024-06-27 17:09:57,817 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 73 predicate places. [2024-06-27 17:09:57,817 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 103 transitions, 1175 flow [2024-06-27 17:09:57,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 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) [2024-06-27 17:09:57,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:09:57,817 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:09:57,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 17:09:58,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-06-27 17:09:58,033 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:09:58,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:09:58,033 INFO L85 PathProgramCache]: Analyzing trace with hash 816308643, now seen corresponding path program 5 times [2024-06-27 17:09:58,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:09:58,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997634211] [2024-06-27 17:09:58,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:09:58,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:09:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:09:58,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:09:58,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:09:58,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997634211] [2024-06-27 17:09:58,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997634211] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:09:58,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217403544] [2024-06-27 17:09:58,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:09:58,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:09:58,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:09:58,234 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:09:58,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 17:09:58,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:09:58,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:09:58,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 17:09:58,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:09:58,623 INFO L349 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2024-06-27 17:09:58,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 117 treesize of output 67 [2024-06-27 17:09:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:09:58,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:09:59,170 INFO L349 Elim1Store]: treesize reduction 10, result has 93.5 percent of original size [2024-06-27 17:09:59,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 196 treesize of output 210 [2024-06-27 17:10:00,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:10:00,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217403544] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:00,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:00,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2024-06-27 17:10:00,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786545070] [2024-06-27 17:10:00,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:00,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 17:10:00,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:00,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 17:10:00,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2024-06-27 17:10:00,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:00,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 103 transitions, 1175 flow. Second operand has 24 states, 24 states have (on average 5.333333333333333) internal successors, (128), 24 states have internal predecessors, (128), 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) [2024-06-27 17:10:00,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:00,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:00,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:03,043 INFO L124 PetriNetUnfolderBase]: 956/1742 cut-off events. [2024-06-27 17:10:03,044 INFO L125 PetriNetUnfolderBase]: For 13024/13024 co-relation queries the response was YES. [2024-06-27 17:10:03,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10252 conditions, 1742 events. 956/1742 cut-off events. For 13024/13024 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9650 event pairs, 35 based on Foata normal form. 26/1768 useless extension candidates. Maximal degree in co-relation 9127. Up to 602 conditions per place. [2024-06-27 17:10:03,067 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 198 selfloop transitions, 164 changer transitions 68/431 dead transitions. [2024-06-27 17:10:03,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 431 transitions, 5034 flow [2024-06-27 17:10:03,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-06-27 17:10:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2024-06-27 17:10:03,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 471 transitions. [2024-06-27 17:10:03,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39915254237288134 [2024-06-27 17:10:03,072 INFO L175 Difference]: Start difference. First operand has 94 places, 103 transitions, 1175 flow. Second operand 59 states and 471 transitions. [2024-06-27 17:10:03,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 431 transitions, 5034 flow [2024-06-27 17:10:03,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 431 transitions, 4822 flow, removed 74 selfloop flow, removed 3 redundant places. [2024-06-27 17:10:03,117 INFO L231 Difference]: Finished difference. Result has 181 places, 238 transitions, 3585 flow [2024-06-27 17:10:03,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=3585, PETRI_PLACES=181, PETRI_TRANSITIONS=238} [2024-06-27 17:10:03,118 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 160 predicate places. [2024-06-27 17:10:03,118 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 238 transitions, 3585 flow [2024-06-27 17:10:03,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.333333333333333) internal successors, (128), 24 states have internal predecessors, (128), 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) [2024-06-27 17:10:03,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:03,119 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:03,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-27 17:10:03,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-06-27 17:10:03,332 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:03,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:03,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1956806556, now seen corresponding path program 6 times [2024-06-27 17:10:03,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:03,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146275157] [2024-06-27 17:10:03,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:03,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:03,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:03,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146275157] [2024-06-27 17:10:03,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146275157] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:03,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832796457] [2024-06-27 17:10:03,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:10:03,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:03,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:03,494 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:10:03,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 17:10:03,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 17:10:03,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:03,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:10:03,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:03,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:03,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:03,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832796457] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:03,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:03,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-06-27 17:10:03,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726276182] [2024-06-27 17:10:03,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:03,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 17:10:03,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:03,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 17:10:03,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-06-27 17:10:03,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:03,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 238 transitions, 3585 flow. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 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) [2024-06-27 17:10:03,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:03,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:03,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:15,652 INFO L124 PetriNetUnfolderBase]: 1076/2065 cut-off events. [2024-06-27 17:10:15,652 INFO L125 PetriNetUnfolderBase]: For 44016/44016 co-relation queries the response was YES. [2024-06-27 17:10:15,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16267 conditions, 2065 events. 1076/2065 cut-off events. For 44016/44016 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 12721 event pairs, 17 based on Foata normal form. 45/2110 useless extension candidates. Maximal degree in co-relation 15837. Up to 663 conditions per place. [2024-06-27 17:10:15,674 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 219 selfloop transitions, 178 changer transitions 14/412 dead transitions. [2024-06-27 17:10:15,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 412 transitions, 6703 flow [2024-06-27 17:10:15,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 17:10:15,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 17:10:15,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 186 transitions. [2024-06-27 17:10:15,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48947368421052634 [2024-06-27 17:10:15,676 INFO L175 Difference]: Start difference. First operand has 181 places, 238 transitions, 3585 flow. Second operand 19 states and 186 transitions. [2024-06-27 17:10:15,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 412 transitions, 6703 flow [2024-06-27 17:10:15,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 412 transitions, 4937 flow, removed 841 selfloop flow, removed 13 redundant places. [2024-06-27 17:10:15,858 INFO L231 Difference]: Finished difference. Result has 188 places, 316 transitions, 4214 flow [2024-06-27 17:10:15,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2487, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4214, PETRI_PLACES=188, PETRI_TRANSITIONS=316} [2024-06-27 17:10:15,859 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 167 predicate places. [2024-06-27 17:10:15,859 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 316 transitions, 4214 flow [2024-06-27 17:10:15,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 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) [2024-06-27 17:10:15,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:15,860 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:15,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 17:10:16,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-06-27 17:10:16,076 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:16,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:16,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1379807750, now seen corresponding path program 7 times [2024-06-27 17:10:16,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:16,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896468717] [2024-06-27 17:10:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:16,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:16,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:16,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896468717] [2024-06-27 17:10:16,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896468717] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:16,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852094218] [2024-06-27 17:10:16,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:10:16,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:16,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:16,227 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:10:16,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 17:10:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:16,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:10:16,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:16,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:16,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852094218] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:16,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:16,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-06-27 17:10:16,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006592266] [2024-06-27 17:10:16,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:16,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 17:10:16,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:16,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 17:10:16,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-06-27 17:10:16,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:16,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 316 transitions, 4214 flow. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 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) [2024-06-27 17:10:16,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:16,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:16,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:11:09,315 INFO L124 PetriNetUnfolderBase]: 1305/2549 cut-off events. [2024-06-27 17:11:09,315 INFO L125 PetriNetUnfolderBase]: For 62690/62690 co-relation queries the response was YES. [2024-06-27 17:11:09,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19566 conditions, 2549 events. 1305/2549 cut-off events. For 62690/62690 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 16865 event pairs, 35 based on Foata normal form. 41/2590 useless extension candidates. Maximal degree in co-relation 18972. Up to 559 conditions per place. [2024-06-27 17:11:09,351 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 282 selfloop transitions, 267 changer transitions 30/580 dead transitions. [2024-06-27 17:11:09,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 580 transitions, 8698 flow [2024-06-27 17:11:09,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-06-27 17:11:09,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-06-27 17:11:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 305 transitions. [2024-06-27 17:11:09,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236111111111111 [2024-06-27 17:11:09,356 INFO L175 Difference]: Start difference. First operand has 188 places, 316 transitions, 4214 flow. Second operand 36 states and 305 transitions. [2024-06-27 17:11:09,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 580 transitions, 8698 flow [2024-06-27 17:11:09,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 580 transitions, 7855 flow, removed 373 selfloop flow, removed 5 redundant places. [2024-06-27 17:11:09,606 INFO L231 Difference]: Finished difference. Result has 234 places, 425 transitions, 6288 flow [2024-06-27 17:11:09,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3791, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=6288, PETRI_PLACES=234, PETRI_TRANSITIONS=425} [2024-06-27 17:11:09,607 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 213 predicate places. [2024-06-27 17:11:09,607 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 425 transitions, 6288 flow [2024-06-27 17:11:09,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 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) [2024-06-27 17:11:09,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:11:09,607 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:11:09,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-06-27 17:11:09,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-06-27 17:11:09,808 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:11:09,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:11:09,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2138807260, now seen corresponding path program 8 times [2024-06-27 17:11:09,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:11:09,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44085278] [2024-06-27 17:11:09,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:11:09,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:11:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:11:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:10,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:11:10,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44085278] [2024-06-27 17:11:10,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44085278] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:11:10,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534648717] [2024-06-27 17:11:10,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:11:10,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:11:10,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:11:10,045 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:11:10,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-27 17:11:10,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:11:10,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:11:10,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:11:10,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:11:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:10,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:11:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:10,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534648717] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:11:10,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:11:10,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-06-27 17:11:10,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655148050] [2024-06-27 17:11:10,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:11:10,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 17:11:10,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:11:10,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 17:11:10,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-06-27 17:11:10,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:11:10,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 425 transitions, 6288 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 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) [2024-06-27 17:11:10,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:11:10,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:11:10,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:11:40,378 INFO L124 PetriNetUnfolderBase]: 1318/2526 cut-off events. [2024-06-27 17:11:40,379 INFO L125 PetriNetUnfolderBase]: For 38668/38668 co-relation queries the response was YES. [2024-06-27 17:11:40,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17609 conditions, 2526 events. 1318/2526 cut-off events. For 38668/38668 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 16335 event pairs, 24 based on Foata normal form. 60/2586 useless extension candidates. Maximal degree in co-relation 17483. Up to 541 conditions per place. [2024-06-27 17:11:40,403 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 243 selfloop transitions, 349 changer transitions 8/601 dead transitions. [2024-06-27 17:11:40,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 601 transitions, 9284 flow [2024-06-27 17:11:40,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-06-27 17:11:40,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-06-27 17:11:40,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 341 transitions. [2024-06-27 17:11:40,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41585365853658535 [2024-06-27 17:11:40,409 INFO L175 Difference]: Start difference. First operand has 234 places, 425 transitions, 6288 flow. Second operand 41 states and 341 transitions. [2024-06-27 17:11:40,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 601 transitions, 9284 flow [2024-06-27 17:11:40,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 601 transitions, 8212 flow, removed 282 selfloop flow, removed 28 redundant places. [2024-06-27 17:11:40,599 INFO L231 Difference]: Finished difference. Result has 251 places, 468 transitions, 6854 flow [2024-06-27 17:11:40,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5166, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=6854, PETRI_PLACES=251, PETRI_TRANSITIONS=468} [2024-06-27 17:11:40,600 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 230 predicate places. [2024-06-27 17:11:40,600 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 468 transitions, 6854 flow [2024-06-27 17:11:40,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 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) [2024-06-27 17:11:40,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:11:40,601 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:11:40,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-06-27 17:11:40,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-06-27 17:11:40,815 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:11:40,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:11:40,815 INFO L85 PathProgramCache]: Analyzing trace with hash -39852787, now seen corresponding path program 9 times [2024-06-27 17:11:40,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:11:40,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496537714] [2024-06-27 17:11:40,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:11:40,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:11:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:11:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:40,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:11:40,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496537714] [2024-06-27 17:11:40,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496537714] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:11:40,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816230506] [2024-06-27 17:11:40,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:11:40,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:11:40,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:11:40,973 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:11:40,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-06-27 17:11:41,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 17:11:41,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:11:41,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:11:41,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:11:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:41,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:11:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:41,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816230506] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:11:41,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:11:41,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-06-27 17:11:41,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122713839] [2024-06-27 17:11:41,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:11:41,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 17:11:41,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:11:41,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 17:11:41,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-06-27 17:11:41,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:11:41,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 468 transitions, 6854 flow. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 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) [2024-06-27 17:11:41,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:11:41,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:11:41,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:11:42,616 INFO L124 PetriNetUnfolderBase]: 1460/2796 cut-off events. [2024-06-27 17:11:42,616 INFO L125 PetriNetUnfolderBase]: For 48586/48586 co-relation queries the response was YES. [2024-06-27 17:11:42,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20114 conditions, 2796 events. 1460/2796 cut-off events. For 48586/48586 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 18444 event pairs, 468 based on Foata normal form. 38/2834 useless extension candidates. Maximal degree in co-relation 19652. Up to 2028 conditions per place. [2024-06-27 17:11:42,641 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 427 selfloop transitions, 182 changer transitions 3/613 dead transitions. [2024-06-27 17:11:42,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 613 transitions, 9821 flow [2024-06-27 17:11:42,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 17:11:42,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 17:11:42,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 213 transitions. [2024-06-27 17:11:42,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426 [2024-06-27 17:11:42,643 INFO L175 Difference]: Start difference. First operand has 251 places, 468 transitions, 6854 flow. Second operand 25 states and 213 transitions. [2024-06-27 17:11:42,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 613 transitions, 9821 flow [2024-06-27 17:11:42,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 613 transitions, 8935 flow, removed 198 selfloop flow, removed 25 redundant places. [2024-06-27 17:11:42,909 INFO L231 Difference]: Finished difference. Result has 261 places, 537 transitions, 7740 flow [2024-06-27 17:11:42,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6065, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=7740, PETRI_PLACES=261, PETRI_TRANSITIONS=537} [2024-06-27 17:11:42,909 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 240 predicate places. [2024-06-27 17:11:42,910 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 537 transitions, 7740 flow [2024-06-27 17:11:42,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 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) [2024-06-27 17:11:42,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:11:42,910 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:11:42,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-06-27 17:11:43,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-06-27 17:11:43,112 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:11:43,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:11:43,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1912011868, now seen corresponding path program 10 times [2024-06-27 17:11:43,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:11:43,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427818446] [2024-06-27 17:11:43,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:11:43,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:11:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:11:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:43,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:11:43,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427818446] [2024-06-27 17:11:43,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427818446] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:11:43,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215023263] [2024-06-27 17:11:43,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:11:43,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:11:43,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:11:43,268 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:11:43,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-06-27 17:11:43,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:11:43,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:11:43,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:11:43,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:11:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:43,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:11:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:43,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215023263] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:11:43,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:11:43,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-06-27 17:11:43,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144856979] [2024-06-27 17:11:43,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:11:43,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 17:11:43,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:11:43,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 17:11:43,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-06-27 17:11:43,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:11:43,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 537 transitions, 7740 flow. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 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) [2024-06-27 17:11:43,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:11:43,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:11:43,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:11:54,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:11:58,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:12:02,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:12:07,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:12:11,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:12:15,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:12:17,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:12:21,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:12:25,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:12:26,964 INFO L124 PetriNetUnfolderBase]: 1719/3373 cut-off events. [2024-06-27 17:12:26,964 INFO L125 PetriNetUnfolderBase]: For 68269/68269 co-relation queries the response was YES. [2024-06-27 17:12:26,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24503 conditions, 3373 events. 1719/3373 cut-off events. For 68269/68269 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 23809 event pairs, 38 based on Foata normal form. 25/3398 useless extension candidates. Maximal degree in co-relation 24016. Up to 1083 conditions per place. [2024-06-27 17:12:26,998 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 323 selfloop transitions, 439 changer transitions 13/776 dead transitions. [2024-06-27 17:12:26,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 776 transitions, 12392 flow [2024-06-27 17:12:26,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-06-27 17:12:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-06-27 17:12:27,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 306 transitions. [2024-06-27 17:12:27,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43714285714285717 [2024-06-27 17:12:27,001 INFO L175 Difference]: Start difference. First operand has 261 places, 537 transitions, 7740 flow. Second operand 35 states and 306 transitions. [2024-06-27 17:12:27,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 776 transitions, 12392 flow [2024-06-27 17:12:27,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 776 transitions, 11993 flow, removed 177 selfloop flow, removed 3 redundant places. [2024-06-27 17:12:27,436 INFO L231 Difference]: Finished difference. Result has 304 places, 635 transitions, 10353 flow [2024-06-27 17:12:27,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7365, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=10353, PETRI_PLACES=304, PETRI_TRANSITIONS=635} [2024-06-27 17:12:27,437 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 283 predicate places. [2024-06-27 17:12:27,437 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 635 transitions, 10353 flow [2024-06-27 17:12:27,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 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) [2024-06-27 17:12:27,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:12:27,437 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:12:27,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-06-27 17:12:27,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:12:27,638 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:12:27,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:12:27,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1754137432, now seen corresponding path program 11 times [2024-06-27 17:12:27,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:12:27,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996857767] [2024-06-27 17:12:27,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:12:27,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:12:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:12:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:12:27,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:12:27,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996857767] [2024-06-27 17:12:27,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996857767] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:12:27,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129931615] [2024-06-27 17:12:27,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:12:27,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:12:27,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:12:27,760 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:12:27,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-06-27 17:12:27,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:12:27,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:12:27,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:12:27,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:12:27,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:12:27,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:12:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:12:28,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129931615] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:12:28,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:12:28,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2024-06-27 17:12:28,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035336785] [2024-06-27 17:12:28,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:12:28,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 17:12:28,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:12:28,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 17:12:28,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-06-27 17:12:28,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:12:28,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 635 transitions, 10353 flow. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 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) [2024-06-27 17:12:28,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:12:28,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:12:28,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:12:32,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:12:36,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:12:40,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:12:44,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:13:04,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:13:08,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:13:12,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:13:16,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:13:44,830 WARN L293 SmtUtils]: Spent 20.11s on a formula simplification. DAG size of input: 32 DAG size of output: 31 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 17:13:48,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:13:52,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:13:55,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:13:59,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:14:02,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:14:10,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:14:14,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.97s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:14:16,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:14:20,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:14:32,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:14:37,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:14:41,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:14:53,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:14:57,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:16:13,268 WARN L293 SmtUtils]: Spent 58.73s on a formula simplification. DAG size of input: 41 DAG size of output: 38 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 17:16:25,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:16:30,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:16:34,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:17:15,539 WARN L293 SmtUtils]: Spent 20.12s on a formula simplification. DAG size of input: 36 DAG size of output: 33 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 17:17:19,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:17:23,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:17:27,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:17:37,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:18:01,134 WARN L293 SmtUtils]: Spent 12.03s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 17:18:05,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:18:07,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:18:11,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:18:15,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:18:19,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:18:37,169 WARN L293 SmtUtils]: Spent 12.53s on a formula simplification. DAG size of input: 39 DAG size of output: 37 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 17:18:41,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:18:45,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:18:49,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:18:53,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:18:57,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:18:59,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:19:03,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:19:07,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:19:11,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:19:15,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:19:20,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:19:24,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:19:24,445 INFO L124 PetriNetUnfolderBase]: 1993/4175 cut-off events. [2024-06-27 17:19:24,445 INFO L125 PetriNetUnfolderBase]: For 97540/97540 co-relation queries the response was YES. [2024-06-27 17:19:24,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32693 conditions, 4175 events. 1993/4175 cut-off events. For 97540/97540 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 32727 event pairs, 21 based on Foata normal form. 30/4205 useless extension candidates. Maximal degree in co-relation 31791. Up to 966 conditions per place. [2024-06-27 17:19:24,482 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 265 selfloop transitions, 617 changer transitions 13/896 dead transitions. [2024-06-27 17:19:24,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 896 transitions, 15892 flow [2024-06-27 17:19:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-06-27 17:19:24,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-06-27 17:19:24,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 273 transitions. [2024-06-27 17:19:24,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3689189189189189 [2024-06-27 17:19:24,489 INFO L175 Difference]: Start difference. First operand has 304 places, 635 transitions, 10353 flow. Second operand 37 states and 273 transitions. [2024-06-27 17:19:24,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 896 transitions, 15892 flow [2024-06-27 17:19:25,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 896 transitions, 14881 flow, removed 267 selfloop flow, removed 14 redundant places. [2024-06-27 17:19:25,068 INFO L231 Difference]: Finished difference. Result has 334 places, 788 transitions, 14152 flow [2024-06-27 17:19:25,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=9358, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=463, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=14152, PETRI_PLACES=334, PETRI_TRANSITIONS=788} [2024-06-27 17:19:25,069 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 313 predicate places. [2024-06-27 17:19:25,069 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 788 transitions, 14152 flow [2024-06-27 17:19:25,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 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) [2024-06-27 17:19:25,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:19:25,072 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:19:25,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-06-27 17:19:25,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:19:25,288 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:19:25,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:19:25,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1689194547, now seen corresponding path program 12 times [2024-06-27 17:19:25,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:19:25,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974067358] [2024-06-27 17:19:25,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:19:25,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:19:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:19:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:25,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:19:25,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974067358] [2024-06-27 17:19:25,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974067358] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:19:25,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862584083] [2024-06-27 17:19:25,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:19:25,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:19:25,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:19:25,488 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:19:25,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-06-27 17:19:25,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 17:19:25,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:19:25,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:19:25,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:19:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:25,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:19:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:25,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862584083] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:19:25,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:19:25,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-06-27 17:19:25,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049426673] [2024-06-27 17:19:25,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:19:25,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 17:19:25,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:19:25,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 17:19:25,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-06-27 17:19:25,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:19:25,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 788 transitions, 14152 flow. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 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) [2024-06-27 17:19:25,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:19:25,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:19:25,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:19:28,216 INFO L124 PetriNetUnfolderBase]: 2082/4367 cut-off events. [2024-06-27 17:19:28,216 INFO L125 PetriNetUnfolderBase]: For 114495/114495 co-relation queries the response was YES. [2024-06-27 17:19:28,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38430 conditions, 4367 events. 2082/4367 cut-off events. For 114495/114495 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 34611 event pairs, 488 based on Foata normal form. 52/4419 useless extension candidates. Maximal degree in co-relation 38002. Up to 2738 conditions per place. [2024-06-27 17:19:28,266 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 671 selfloop transitions, 279 changer transitions 6/957 dead transitions. [2024-06-27 17:19:28,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 957 transitions, 18914 flow [2024-06-27 17:19:28,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 17:19:28,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 17:19:28,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 226 transitions. [2024-06-27 17:19:28,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346153846153846 [2024-06-27 17:19:28,269 INFO L175 Difference]: Start difference. First operand has 334 places, 788 transitions, 14152 flow. Second operand 26 states and 226 transitions. [2024-06-27 17:19:28,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 957 transitions, 18914 flow [2024-06-27 17:19:29,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 957 transitions, 16709 flow, removed 993 selfloop flow, removed 16 redundant places. [2024-06-27 17:19:29,504 INFO L231 Difference]: Finished difference. Result has 349 places, 832 transitions, 14241 flow [2024-06-27 17:19:29,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=12142, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=14241, PETRI_PLACES=349, PETRI_TRANSITIONS=832} [2024-06-27 17:19:29,505 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 328 predicate places. [2024-06-27 17:19:29,505 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 832 transitions, 14241 flow [2024-06-27 17:19:29,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 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) [2024-06-27 17:19:29,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:19:29,505 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:19:29,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-06-27 17:19:29,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:19:29,706 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:19:29,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:19:29,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1779940722, now seen corresponding path program 13 times [2024-06-27 17:19:29,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:19:29,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471241446] [2024-06-27 17:19:29,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:19:29,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:19:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:19:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:29,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:19:29,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471241446] [2024-06-27 17:19:29,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471241446] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:19:29,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503624671] [2024-06-27 17:19:29,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:19:29,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:19:29,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:19:29,895 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:19:29,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-06-27 17:19:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:19:29,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:19:29,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:19:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:30,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:19:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:30,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503624671] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:19:30,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:19:30,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-06-27 17:19:30,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829110643] [2024-06-27 17:19:30,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:19:30,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 17:19:30,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:19:30,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 17:19:30,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-06-27 17:19:30,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:19:30,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 832 transitions, 14241 flow. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 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) [2024-06-27 17:19:30,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:19:30,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:19:30,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:19:35,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:19:42,116 INFO L124 PetriNetUnfolderBase]: 2310/4841 cut-off events. [2024-06-27 17:19:42,117 INFO L125 PetriNetUnfolderBase]: For 63039/63039 co-relation queries the response was YES. [2024-06-27 17:19:42,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37938 conditions, 4841 events. 2310/4841 cut-off events. For 63039/63039 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 39170 event pairs, 47 based on Foata normal form. 36/4877 useless extension candidates. Maximal degree in co-relation 37603. Up to 2259 conditions per place. [2024-06-27 17:19:42,166 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 571 selfloop transitions, 456 changer transitions 2/1030 dead transitions. [2024-06-27 17:19:42,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 1030 transitions, 18943 flow [2024-06-27 17:19:42,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 17:19:42,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 17:19:42,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 207 transitions. [2024-06-27 17:19:42,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.414 [2024-06-27 17:19:42,169 INFO L175 Difference]: Start difference. First operand has 349 places, 832 transitions, 14241 flow. Second operand 25 states and 207 transitions. [2024-06-27 17:19:42,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 1030 transitions, 18943 flow [2024-06-27 17:19:42,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1030 transitions, 18575 flow, removed 101 selfloop flow, removed 14 redundant places. [2024-06-27 17:19:42,832 INFO L231 Difference]: Finished difference. Result has 370 places, 920 transitions, 17203 flow [2024-06-27 17:19:42,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=13877, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=17203, PETRI_PLACES=370, PETRI_TRANSITIONS=920} [2024-06-27 17:19:42,833 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 349 predicate places. [2024-06-27 17:19:42,833 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 920 transitions, 17203 flow [2024-06-27 17:19:42,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 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) [2024-06-27 17:19:42,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:19:42,833 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:19:42,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-06-27 17:19:43,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:19:43,049 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:19:43,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:19:43,049 INFO L85 PathProgramCache]: Analyzing trace with hash 137679267, now seen corresponding path program 14 times [2024-06-27 17:19:43,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:19:43,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940910976] [2024-06-27 17:19:43,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:19:43,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:19:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:19:43,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:43,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:19:43,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940910976] [2024-06-27 17:19:43,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940910976] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:19:43,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320852088] [2024-06-27 17:19:43,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:19:43,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:19:43,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:19:43,233 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:19:43,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-06-27 17:19:43,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:19:43,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:19:43,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:19:43,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:19:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:43,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:19:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:43,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320852088] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:19:43,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:19:43,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-06-27 17:19:43,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962834213] [2024-06-27 17:19:43,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:19:43,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 17:19:43,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:19:43,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 17:19:43,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2024-06-27 17:19:43,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:19:43,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 920 transitions, 17203 flow. Second operand has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 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) [2024-06-27 17:19:43,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:19:43,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:19:43,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:19:46,858 INFO L124 PetriNetUnfolderBase]: 2205/4692 cut-off events. [2024-06-27 17:19:46,858 INFO L125 PetriNetUnfolderBase]: For 76947/76947 co-relation queries the response was YES. [2024-06-27 17:19:46,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39022 conditions, 4692 events. 2205/4692 cut-off events. For 76947/76947 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 38246 event pairs, 359 based on Foata normal form. 64/4756 useless extension candidates. Maximal degree in co-relation 38712. Up to 2189 conditions per place. [2024-06-27 17:19:46,899 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 677 selfloop transitions, 334 changer transitions 21/1033 dead transitions. [2024-06-27 17:19:46,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 1033 transitions, 20355 flow [2024-06-27 17:19:46,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-06-27 17:19:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-06-27 17:19:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 314 transitions. [2024-06-27 17:19:46,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36511627906976746 [2024-06-27 17:19:46,901 INFO L175 Difference]: Start difference. First operand has 370 places, 920 transitions, 17203 flow. Second operand 43 states and 314 transitions. [2024-06-27 17:19:46,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 1033 transitions, 20355 flow [2024-06-27 17:19:47,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 1033 transitions, 19950 flow, removed 80 selfloop flow, removed 11 redundant places. [2024-06-27 17:19:47,708 INFO L231 Difference]: Finished difference. Result has 404 places, 911 transitions, 17409 flow [2024-06-27 17:19:47,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=16093, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=889, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=17409, PETRI_PLACES=404, PETRI_TRANSITIONS=911} [2024-06-27 17:19:47,709 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 383 predicate places. [2024-06-27 17:19:47,710 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 911 transitions, 17409 flow [2024-06-27 17:19:47,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 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) [2024-06-27 17:19:47,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:19:47,710 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:19:47,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-06-27 17:19:47,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:19:47,911 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:19:47,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:19:47,911 INFO L85 PathProgramCache]: Analyzing trace with hash -468765423, now seen corresponding path program 15 times [2024-06-27 17:19:47,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:19:47,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898581632] [2024-06-27 17:19:47,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:19:47,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:19:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:19:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:48,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:19:48,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898581632] [2024-06-27 17:19:48,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898581632] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:19:48,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188170769] [2024-06-27 17:19:48,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:19:48,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:19:48,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:19:48,117 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:19:48,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-06-27 17:19:48,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 17:19:48,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:19:48,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:19:48,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:19:48,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:48,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:19:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:48,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188170769] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:19:48,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:19:48,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-06-27 17:19:48,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500263649] [2024-06-27 17:19:48,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:19:48,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 17:19:48,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:19:48,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 17:19:48,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-06-27 17:19:48,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:19:48,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 911 transitions, 17409 flow. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 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) [2024-06-27 17:19:48,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:19:48,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:19:48,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:19:52,461 INFO L124 PetriNetUnfolderBase]: 2544/5317 cut-off events. [2024-06-27 17:19:52,462 INFO L125 PetriNetUnfolderBase]: For 95728/95728 co-relation queries the response was YES. [2024-06-27 17:19:52,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47298 conditions, 5317 events. 2544/5317 cut-off events. For 95728/95728 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 43690 event pairs, 784 based on Foata normal form. 112/5429 useless extension candidates. Maximal degree in co-relation 47108. Up to 4277 conditions per place. [2024-06-27 17:19:52,532 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 927 selfloop transitions, 273 changer transitions 2/1203 dead transitions. [2024-06-27 17:19:52,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 1203 transitions, 25762 flow [2024-06-27 17:19:52,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-06-27 17:19:52,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-06-27 17:19:52,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 295 transitions. [2024-06-27 17:19:52,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3881578947368421 [2024-06-27 17:19:52,544 INFO L175 Difference]: Start difference. First operand has 404 places, 911 transitions, 17409 flow. Second operand 38 states and 295 transitions. [2024-06-27 17:19:52,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 1203 transitions, 25762 flow [2024-06-27 17:19:53,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 1203 transitions, 24677 flow, removed 398 selfloop flow, removed 18 redundant places. [2024-06-27 17:19:53,579 INFO L231 Difference]: Finished difference. Result has 441 places, 1091 transitions, 22103 flow [2024-06-27 17:19:53,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=16846, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=911, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=22103, PETRI_PLACES=441, PETRI_TRANSITIONS=1091} [2024-06-27 17:19:53,579 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 420 predicate places. [2024-06-27 17:19:53,579 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 1091 transitions, 22103 flow [2024-06-27 17:19:53,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 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) [2024-06-27 17:19:53,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:19:53,580 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:19:53,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-06-27 17:19:53,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:19:53,780 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:19:53,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:19:53,781 INFO L85 PathProgramCache]: Analyzing trace with hash -78863170, now seen corresponding path program 16 times [2024-06-27 17:19:53,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:19:53,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254365694] [2024-06-27 17:19:53,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:19:53,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:19:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:19:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:53,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:19:53,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254365694] [2024-06-27 17:19:53,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254365694] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:19:53,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100133852] [2024-06-27 17:19:53,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:19:53,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:19:53,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:19:53,951 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:19:53,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-06-27 17:19:54,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:19:54,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:19:54,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:19:54,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:19:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:54,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:19:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:54,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100133852] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:19:54,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:19:54,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-06-27 17:19:54,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455628358] [2024-06-27 17:19:54,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:19:54,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 17:19:54,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:19:54,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 17:19:54,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-06-27 17:19:54,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:19:54,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 1091 transitions, 22103 flow. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 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) [2024-06-27 17:19:54,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:19:54,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:19:54,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:20:00,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:20:29,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:20:33,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:20:39,761 INFO L124 PetriNetUnfolderBase]: 2701/5597 cut-off events. [2024-06-27 17:20:39,761 INFO L125 PetriNetUnfolderBase]: For 106867/106867 co-relation queries the response was YES. [2024-06-27 17:20:39,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50996 conditions, 5597 events. 2701/5597 cut-off events. For 106867/106867 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 46099 event pairs, 580 based on Foata normal form. 60/5657 useless extension candidates. Maximal degree in co-relation 50786. Up to 3264 conditions per place. [2024-06-27 17:20:39,906 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 847 selfloop transitions, 426 changer transitions 1/1275 dead transitions. [2024-06-27 17:20:39,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 1275 transitions, 27368 flow [2024-06-27 17:20:39,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-06-27 17:20:39,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-06-27 17:20:39,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 252 transitions. [2024-06-27 17:20:39,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-27 17:20:39,909 INFO L175 Difference]: Start difference. First operand has 441 places, 1091 transitions, 22103 flow. Second operand 32 states and 252 transitions. [2024-06-27 17:20:39,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 1275 transitions, 27368 flow [2024-06-27 17:20:41,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 1275 transitions, 26214 flow, removed 451 selfloop flow, removed 13 redundant places. [2024-06-27 17:20:41,239 INFO L231 Difference]: Finished difference. Result has 469 places, 1152 transitions, 23722 flow [2024-06-27 17:20:41,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=20705, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1077, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=355, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=696, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=23722, PETRI_PLACES=469, PETRI_TRANSITIONS=1152} [2024-06-27 17:20:41,240 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 448 predicate places. [2024-06-27 17:20:41,241 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 1152 transitions, 23722 flow [2024-06-27 17:20:41,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 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) [2024-06-27 17:20:41,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:20:41,241 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:20:41,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-06-27 17:20:41,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-06-27 17:20:41,457 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:20:41,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:20:41,457 INFO L85 PathProgramCache]: Analyzing trace with hash 980709303, now seen corresponding path program 17 times [2024-06-27 17:20:41,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:20:41,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991566150] [2024-06-27 17:20:41,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:20:41,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:20:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:20:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:20:41,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:20:41,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991566150] [2024-06-27 17:20:41,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991566150] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:20:41,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074395959] [2024-06-27 17:20:41,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:20:41,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:20:41,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:20:41,708 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:20:41,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-06-27 17:20:41,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 17:20:41,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:20:41,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:20:41,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:20:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:20:41,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:20:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:20:42,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074395959] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:20:42,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:20:42,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-06-27 17:20:42,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470733163] [2024-06-27 17:20:42,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:20:42,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 17:20:42,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:20:42,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 17:20:42,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-06-27 17:20:42,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:20:42,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 1152 transitions, 23722 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 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) [2024-06-27 17:20:42,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:20:42,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:20:42,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:20:46,723 INFO L124 PetriNetUnfolderBase]: 3240/6813 cut-off events. [2024-06-27 17:20:46,724 INFO L125 PetriNetUnfolderBase]: For 156207/156207 co-relation queries the response was YES. [2024-06-27 17:20:46,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64515 conditions, 6813 events. 3240/6813 cut-off events. For 156207/156207 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 58640 event pairs, 724 based on Foata normal form. 72/6885 useless extension candidates. Maximal degree in co-relation 64210. Up to 4024 conditions per place. [2024-06-27 17:20:46,804 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1021 selfloop transitions, 497 changer transitions 7/1526 dead transitions. [2024-06-27 17:20:46,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1526 transitions, 34407 flow [2024-06-27 17:20:46,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 17:20:46,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 17:20:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 245 transitions. [2024-06-27 17:20:46,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 17:20:46,806 INFO L175 Difference]: Start difference. First operand has 469 places, 1152 transitions, 23722 flow. Second operand 28 states and 245 transitions. [2024-06-27 17:20:46,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1526 transitions, 34407 flow [2024-06-27 17:20:49,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 1526 transitions, 33986 flow, removed 170 selfloop flow, removed 7 redundant places. [2024-06-27 17:20:49,204 INFO L231 Difference]: Finished difference. Result has 497 places, 1327 transitions, 29177 flow [2024-06-27 17:20:49,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=23148, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=747, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=29177, PETRI_PLACES=497, PETRI_TRANSITIONS=1327} [2024-06-27 17:20:49,205 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 476 predicate places. [2024-06-27 17:20:49,205 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 1327 transitions, 29177 flow [2024-06-27 17:20:49,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 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) [2024-06-27 17:20:49,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:20:49,206 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:20:49,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-06-27 17:20:49,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-06-27 17:20:49,406 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:20:49,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:20:49,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1769626433, now seen corresponding path program 18 times [2024-06-27 17:20:49,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:20:49,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555444855] [2024-06-27 17:20:49,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:20:49,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:20:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:20:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:20:49,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:20:49,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555444855] [2024-06-27 17:20:49,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555444855] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:20:49,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009815420] [2024-06-27 17:20:49,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:20:49,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:20:49,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:20:49,596 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:20:49,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-06-27 17:20:49,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 17:20:49,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:20:49,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:20:49,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:20:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:20:49,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:20:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:20:49,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009815420] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:20:49,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:20:49,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-06-27 17:20:49,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881801622] [2024-06-27 17:20:49,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:20:49,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 17:20:49,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:20:49,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 17:20:49,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-06-27 17:20:49,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:20:49,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 1327 transitions, 29177 flow. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 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) [2024-06-27 17:20:49,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:20:49,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:20:49,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:20:56,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:20:58,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:21:02,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:21:05,900 INFO L124 PetriNetUnfolderBase]: 3475/7264 cut-off events. [2024-06-27 17:21:05,901 INFO L125 PetriNetUnfolderBase]: For 193028/193028 co-relation queries the response was YES. [2024-06-27 17:21:05,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73007 conditions, 7264 events. 3475/7264 cut-off events. For 193028/193028 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 62465 event pairs, 497 based on Foata normal form. 51/7315 useless extension candidates. Maximal degree in co-relation 72678. Up to 2898 conditions per place. [2024-06-27 17:21:05,988 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 959 selfloop transitions, 626 changer transitions 20/1606 dead transitions. [2024-06-27 17:21:05,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 1606 transitions, 38044 flow [2024-06-27 17:21:05,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-06-27 17:21:05,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-06-27 17:21:05,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 361 transitions. [2024-06-27 17:21:05,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.353921568627451 [2024-06-27 17:21:05,990 INFO L175 Difference]: Start difference. First operand has 497 places, 1327 transitions, 29177 flow. Second operand 51 states and 361 transitions. [2024-06-27 17:21:05,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 1606 transitions, 38044 flow [2024-06-27 17:21:08,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 1606 transitions, 37026 flow, removed 432 selfloop flow, removed 14 redundant places. [2024-06-27 17:21:08,974 INFO L231 Difference]: Finished difference. Result has 545 places, 1465 transitions, 33840 flow [2024-06-27 17:21:08,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=28023, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=791, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=33840, PETRI_PLACES=545, PETRI_TRANSITIONS=1465} [2024-06-27 17:21:08,976 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 524 predicate places. [2024-06-27 17:21:08,976 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 1465 transitions, 33840 flow [2024-06-27 17:21:08,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 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) [2024-06-27 17:21:08,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:21:08,976 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:21:08,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-06-27 17:21:09,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-06-27 17:21:09,177 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:21:09,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:21:09,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1533786524, now seen corresponding path program 19 times [2024-06-27 17:21:09,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:21:09,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538253888] [2024-06-27 17:21:09,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:21:09,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:21:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:21:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:21:09,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:21:09,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538253888] [2024-06-27 17:21:09,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538253888] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:21:09,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668295955] [2024-06-27 17:21:09,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:21:09,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:21:09,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:21:09,305 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:21:09,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-06-27 17:21:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:21:09,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:21:09,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:21:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:21:09,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:21:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:21:09,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668295955] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:21:09,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:21:09,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-06-27 17:21:09,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079911452] [2024-06-27 17:21:09,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:21:09,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 17:21:09,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:21:09,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 17:21:09,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-06-27 17:21:09,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:21:09,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 1465 transitions, 33840 flow. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 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) [2024-06-27 17:21:09,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:21:09,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:21:09,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:21:12,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:21:18,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:21:25,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:21:30,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:21:34,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:21:38,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:21:42,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:21:46,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:21:51,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:21:55,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:22:01,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:22:09,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:22:18,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:22:30,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:22:30,922 INFO L124 PetriNetUnfolderBase]: 3512/7363 cut-off events. [2024-06-27 17:22:30,923 INFO L125 PetriNetUnfolderBase]: For 216104/216104 co-relation queries the response was YES. [2024-06-27 17:22:30,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76825 conditions, 7363 events. 3512/7363 cut-off events. For 216104/216104 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 63799 event pairs, 711 based on Foata normal form. 8/7371 useless extension candidates. Maximal degree in co-relation 76241. Up to 3056 conditions per place. [2024-06-27 17:22:31,011 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1168 selfloop transitions, 384 changer transitions 8/1561 dead transitions. [2024-06-27 17:22:31,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 1561 transitions, 38298 flow [2024-06-27 17:22:31,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 17:22:31,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 17:22:31,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 169 transitions. [2024-06-27 17:22:31,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3840909090909091 [2024-06-27 17:22:31,013 INFO L175 Difference]: Start difference. First operand has 545 places, 1465 transitions, 33840 flow. Second operand 22 states and 169 transitions. [2024-06-27 17:22:31,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 1561 transitions, 38298 flow [2024-06-27 17:22:34,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 1561 transitions, 37066 flow, removed 539 selfloop flow, removed 18 redundant places. [2024-06-27 17:22:34,322 INFO L231 Difference]: Finished difference. Result has 551 places, 1478 transitions, 34318 flow [2024-06-27 17:22:34,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=32520, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1082, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=34318, PETRI_PLACES=551, PETRI_TRANSITIONS=1478} [2024-06-27 17:22:34,323 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 530 predicate places. [2024-06-27 17:22:34,324 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 1478 transitions, 34318 flow [2024-06-27 17:22:34,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 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) [2024-06-27 17:22:34,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:22:34,324 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:22:34,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-06-27 17:22:34,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:22:34,539 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:22:34,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:22:34,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1424968588, now seen corresponding path program 20 times [2024-06-27 17:22:34,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:22:34,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683875531] [2024-06-27 17:22:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:22:34,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:22:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:22:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:22:34,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:22:34,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683875531] [2024-06-27 17:22:34,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683875531] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:22:34,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373698190] [2024-06-27 17:22:34,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:22:34,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:22:34,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:22:34,705 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:22:34,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-06-27 17:22:34,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:22:34,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:22:34,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:22:34,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:22:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:22:34,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:22:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:22:35,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373698190] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:22:35,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:22:35,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-06-27 17:22:35,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947844741] [2024-06-27 17:22:35,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:22:35,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 17:22:35,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:22:35,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 17:22:35,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-06-27 17:22:35,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:22:35,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 1478 transitions, 34318 flow. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 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) [2024-06-27 17:22:35,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:22:35,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:22:35,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:22:41,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:22:45,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:23:15,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:23:24,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:23:37,786 INFO L124 PetriNetUnfolderBase]: 3777/7905 cut-off events. [2024-06-27 17:23:37,786 INFO L125 PetriNetUnfolderBase]: For 247577/247577 co-relation queries the response was YES. [2024-06-27 17:23:37,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83447 conditions, 7905 events. 3777/7905 cut-off events. For 247577/247577 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 69268 event pairs, 890 based on Foata normal form. 78/7983 useless extension candidates. Maximal degree in co-relation 82893. Up to 4741 conditions per place. [2024-06-27 17:23:37,880 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 1177 selfloop transitions, 546 changer transitions 5/1729 dead transitions. [2024-06-27 17:23:37,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 1729 transitions, 42877 flow [2024-06-27 17:23:37,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-06-27 17:23:37,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-06-27 17:23:37,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 313 transitions. [2024-06-27 17:23:37,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39125 [2024-06-27 17:23:37,881 INFO L175 Difference]: Start difference. First operand has 551 places, 1478 transitions, 34318 flow. Second operand 40 states and 313 transitions. [2024-06-27 17:23:37,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 1729 transitions, 42877 flow [2024-06-27 17:23:41,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 1729 transitions, 42674 flow, removed 47 selfloop flow, removed 10 redundant places. [2024-06-27 17:23:41,689 INFO L231 Difference]: Finished difference. Result has 599 places, 1603 transitions, 39513 flow [2024-06-27 17:23:41,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=33993, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1001, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=39513, PETRI_PLACES=599, PETRI_TRANSITIONS=1603} [2024-06-27 17:23:41,691 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 578 predicate places. [2024-06-27 17:23:41,691 INFO L495 AbstractCegarLoop]: Abstraction has has 599 places, 1603 transitions, 39513 flow [2024-06-27 17:23:41,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 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) [2024-06-27 17:23:41,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:23:41,691 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:23:41,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-06-27 17:23:41,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-06-27 17:23:41,893 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:23:41,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:23:41,894 INFO L85 PathProgramCache]: Analyzing trace with hash 2087891666, now seen corresponding path program 21 times [2024-06-27 17:23:41,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:23:41,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11934915] [2024-06-27 17:23:41,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:23:41,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:23:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:23:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:23:42,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:23:42,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11934915] [2024-06-27 17:23:42,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11934915] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:23:42,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646639378] [2024-06-27 17:23:42,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:23:42,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:23:42,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:23:42,034 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:23:42,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-06-27 17:23:42,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 17:23:42,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:23:42,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:23:42,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:23:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:23:42,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:23:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:23:42,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646639378] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:23:42,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:23:42,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-06-27 17:23:42,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608584921] [2024-06-27 17:23:42,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:23:42,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 17:23:42,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:23:42,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 17:23:42,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-06-27 17:23:42,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:23:42,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 1603 transitions, 39513 flow. Second operand has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 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) [2024-06-27 17:23:42,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:23:42,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:23:42,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15