./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:32:53,722 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:32:53,797 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:32:53,803 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:32:53,805 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:32:53,834 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:32:53,835 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:32:53,835 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:32:53,836 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:32:53,837 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:32:53,837 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:32:53,838 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:32:53,838 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:32:53,840 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:32:53,840 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:32:53,841 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:32:53,841 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:32:53,841 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:32:53,841 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:32:53,842 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:32:53,842 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:32:53,846 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:32:53,846 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:32:53,846 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:32:53,847 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:32:53,847 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:32:53,847 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:32:53,848 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:32:53,848 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:32:53,848 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:32:53,848 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:32:53,848 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:32:53,849 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:32:53,849 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:32:53,849 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:32:53,849 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:32:53,850 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:32:53,850 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:32:53,850 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:32:53,850 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:32:53,850 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:32:53,851 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:32:53,852 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 [2024-10-11 14:32:54,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:32:54,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:32:54,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:32:54,136 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:32:54,136 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:32:54,137 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2024-10-11 14:32:55,548 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:32:55,732 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:32:55,733 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2024-10-11 14:32:55,746 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/a5ef2fc1c/a64b7254142b400b9ae2ec93d79d119f/FLAG1370f2822 [2024-10-11 14:32:56,112 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/a5ef2fc1c/a64b7254142b400b9ae2ec93d79d119f [2024-10-11 14:32:56,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:32:56,130 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:32:56,131 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:32:56,132 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:32:56,141 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:32:56,142 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:56" (1/1) ... [2024-10-11 14:32:56,143 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c459a4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:56, skipping insertion in model container [2024-10-11 14:32:56,143 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:56" (1/1) ... [2024-10-11 14:32:56,167 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:32:56,388 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4284,4297] [2024-10-11 14:32:56,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:32:56,419 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:32:56,453 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4284,4297] [2024-10-11 14:32:56,458 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:32:56,480 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:32:56,481 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:56 WrapperNode [2024-10-11 14:32:56,481 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:32:56,482 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:32:56,483 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:32:56,483 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:32:56,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:56" (1/1) ... [2024-10-11 14:32:56,504 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:56" (1/1) ... [2024-10-11 14:32:56,535 INFO L138 Inliner]: procedures = 26, calls = 63, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 336 [2024-10-11 14:32:56,536 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:32:56,537 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:32:56,537 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:32:56,537 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:32:56,550 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:56" (1/1) ... [2024-10-11 14:32:56,551 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:56" (1/1) ... [2024-10-11 14:32:56,555 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:56" (1/1) ... [2024-10-11 14:32:56,573 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-10-11 14:32:56,574 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:56" (1/1) ... [2024-10-11 14:32:56,574 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:56" (1/1) ... [2024-10-11 14:32:56,583 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:56" (1/1) ... [2024-10-11 14:32:56,588 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:56" (1/1) ... [2024-10-11 14:32:56,589 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:56" (1/1) ... [2024-10-11 14:32:56,591 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:56" (1/1) ... [2024-10-11 14:32:56,594 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:32:56,596 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:32:56,596 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:32:56,596 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:32:56,597 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:56" (1/1) ... [2024-10-11 14:32:56,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:32:56,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:56,639 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:32:56,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:32:56,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:32:56,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:32:56,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:32:56,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:32:56,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:32:56,689 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:32:56,689 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:32:56,689 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:32:56,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:32:56,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-11 14:32:56,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-11 14:32:56,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-10-11 14:32:56,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-10-11 14:32:56,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:32:56,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:32:56,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 14:32:56,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 14:32:56,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 14:32:56,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:32:56,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:32:56,694 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:32:56,835 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:32:56,837 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:32:57,331 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:32:57,333 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:32:57,705 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:32:57,705 INFO L314 CfgBuilder]: Removed 7 assume(true) statements. [2024-10-11 14:32:57,706 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:57 BoogieIcfgContainer [2024-10-11 14:32:57,706 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:32:57,708 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:32:57,708 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:32:57,712 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:32:57,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:32:56" (1/3) ... [2024-10-11 14:32:57,713 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df0092a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:57, skipping insertion in model container [2024-10-11 14:32:57,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:56" (2/3) ... [2024-10-11 14:32:57,713 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df0092a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:57, skipping insertion in model container [2024-10-11 14:32:57,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:57" (3/3) ... [2024-10-11 14:32:57,714 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2024-10-11 14:32:57,730 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:32:57,731 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:32:57,731 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:32:57,796 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-11 14:32:57,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 50 transitions, 128 flow [2024-10-11 14:32:57,865 INFO L124 PetriNetUnfolderBase]: 7/46 cut-off events. [2024-10-11 14:32:57,866 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 14:32:57,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 46 events. 7/46 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 69 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2024-10-11 14:32:57,872 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 50 transitions, 128 flow [2024-10-11 14:32:57,877 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 45 transitions, 114 flow [2024-10-11 14:32:57,889 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:32:57,897 INFO L333 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, 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;@421d52b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:32:57,898 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-11 14:32:57,914 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:32:57,914 INFO L124 PetriNetUnfolderBase]: 7/44 cut-off events. [2024-10-11 14:32:57,914 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 14:32:57,915 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:57,915 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:57,916 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:32:57,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:57,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2021043820, now seen corresponding path program 1 times [2024-10-11 14:32:57,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:57,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241275709] [2024-10-11 14:32:57,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:57,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:58,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:58,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241275709] [2024-10-11 14:32:58,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241275709] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:32:58,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:32:58,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:32:58,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846455329] [2024-10-11 14:32:58,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:32:58,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:32:58,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:58,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:32:58,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:32:58,463 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-10-11 14:32:58,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2024-10-11 14:32:58,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:58,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-10-11 14:32:58,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:58,862 INFO L124 PetriNetUnfolderBase]: 1030/1754 cut-off events. [2024-10-11 14:32:58,863 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2024-10-11 14:32:58,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3311 conditions, 1754 events. 1030/1754 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 10488 event pairs, 252 based on Foata normal form. 1/1665 useless extension candidates. Maximal degree in co-relation 2793. Up to 989 conditions per place. [2024-10-11 14:32:58,888 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 39 selfloop transitions, 3 changer transitions 1/60 dead transitions. [2024-10-11 14:32:58,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 60 transitions, 245 flow [2024-10-11 14:32:58,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:32:58,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:32:58,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-10-11 14:32:58,901 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7133333333333334 [2024-10-11 14:32:58,903 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 114 flow. Second operand 3 states and 107 transitions. [2024-10-11 14:32:58,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 60 transitions, 245 flow [2024-10-11 14:32:58,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 219 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-11 14:32:58,914 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 117 flow [2024-10-11 14:32:58,916 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2024-10-11 14:32:58,920 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2024-10-11 14:32:58,920 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 117 flow [2024-10-11 14:32:58,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2024-10-11 14:32:58,921 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:58,921 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:58,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:32:58,922 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:32:58,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:58,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1903436439, now seen corresponding path program 1 times [2024-10-11 14:32:58,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:58,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16606774] [2024-10-11 14:32:58,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:58,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:59,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:59,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16606774] [2024-10-11 14:32:59,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16606774] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:32:59,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:32:59,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:32:59,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063643299] [2024-10-11 14:32:59,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:32:59,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:32:59,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:59,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:32:59,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:32:59,148 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-10-11 14:32:59,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2024-10-11 14:32:59,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:59,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-10-11 14:32:59,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:59,439 INFO L124 PetriNetUnfolderBase]: 1204/1956 cut-off events. [2024-10-11 14:32:59,439 INFO L125 PetriNetUnfolderBase]: For 376/376 co-relation queries the response was YES. [2024-10-11 14:32:59,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4088 conditions, 1956 events. 1204/1956 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 11296 event pairs, 362 based on Foata normal form. 64/1928 useless extension candidates. Maximal degree in co-relation 1456. Up to 1131 conditions per place. [2024-10-11 14:32:59,456 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 48 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2024-10-11 14:32:59,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 271 flow [2024-10-11 14:32:59,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:32:59,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:32:59,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2024-10-11 14:32:59,459 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.74 [2024-10-11 14:32:59,459 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 117 flow. Second operand 3 states and 111 transitions. [2024-10-11 14:32:59,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 271 flow [2024-10-11 14:32:59,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 267 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:32:59,464 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 128 flow [2024-10-11 14:32:59,465 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2024-10-11 14:32:59,465 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2024-10-11 14:32:59,465 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 128 flow [2024-10-11 14:32:59,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2024-10-11 14:32:59,466 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:59,466 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:59,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:32:59,466 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:32:59,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:59,467 INFO L85 PathProgramCache]: Analyzing trace with hash 764626461, now seen corresponding path program 1 times [2024-10-11 14:32:59,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:59,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414958854] [2024-10-11 14:32:59,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:59,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:59,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:59,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414958854] [2024-10-11 14:32:59,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414958854] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:32:59,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:32:59,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:32:59,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226959514] [2024-10-11 14:32:59,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:32:59,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:32:59,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:59,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:32:59,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:32:59,594 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-10-11 14:32:59,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2024-10-11 14:32:59,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:59,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-10-11 14:32:59,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:59,919 INFO L124 PetriNetUnfolderBase]: 1425/2334 cut-off events. [2024-10-11 14:32:59,919 INFO L125 PetriNetUnfolderBase]: For 866/866 co-relation queries the response was YES. [2024-10-11 14:32:59,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5057 conditions, 2334 events. 1425/2334 cut-off events. For 866/866 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13350 event pairs, 399 based on Foata normal form. 33/2273 useless extension candidates. Maximal degree in co-relation 3352. Up to 1290 conditions per place. [2024-10-11 14:32:59,934 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 48 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2024-10-11 14:32:59,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 67 transitions, 287 flow [2024-10-11 14:32:59,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:32:59,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:32:59,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2024-10-11 14:32:59,938 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7266666666666667 [2024-10-11 14:32:59,938 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 128 flow. Second operand 3 states and 109 transitions. [2024-10-11 14:32:59,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 67 transitions, 287 flow [2024-10-11 14:32:59,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 67 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:32:59,942 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 140 flow [2024-10-11 14:32:59,942 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-10-11 14:32:59,943 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2024-10-11 14:32:59,944 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 140 flow [2024-10-11 14:32:59,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2024-10-11 14:32:59,944 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:59,944 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:59,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:32:59,945 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:32:59,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:59,945 INFO L85 PathProgramCache]: Analyzing trace with hash -673420964, now seen corresponding path program 1 times [2024-10-11 14:32:59,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:59,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847471617] [2024-10-11 14:32:59,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:59,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:33:00,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:33:00,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847471617] [2024-10-11 14:33:00,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847471617] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:33:00,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:33:00,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:33:00,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190294851] [2024-10-11 14:33:00,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:33:00,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:33:00,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:33:00,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:33:00,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:33:00,143 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-10-11 14:33:00,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2024-10-11 14:33:00,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:33:00,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-10-11 14:33:00,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:33:00,535 INFO L124 PetriNetUnfolderBase]: 1783/2862 cut-off events. [2024-10-11 14:33:00,535 INFO L125 PetriNetUnfolderBase]: For 1450/1450 co-relation queries the response was YES. [2024-10-11 14:33:00,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6695 conditions, 2862 events. 1783/2862 cut-off events. For 1450/1450 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17778 event pairs, 1276 based on Foata normal form. 72/2653 useless extension candidates. Maximal degree in co-relation 3442. Up to 1897 conditions per place. [2024-10-11 14:33:00,554 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 56 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2024-10-11 14:33:00,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 351 flow [2024-10-11 14:33:00,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:33:00,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:33:00,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-10-11 14:33:00,587 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.652 [2024-10-11 14:33:00,588 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 140 flow. Second operand 5 states and 163 transitions. [2024-10-11 14:33:00,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 351 flow [2024-10-11 14:33:00,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:33:00,592 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 190 flow [2024-10-11 14:33:00,592 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2024-10-11 14:33:00,593 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2024-10-11 14:33:00,593 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 190 flow [2024-10-11 14:33:00,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2024-10-11 14:33:00,595 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:33:00,595 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:33:00,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:33:00,596 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:33:00,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:33:00,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1409691762, now seen corresponding path program 1 times [2024-10-11 14:33:00,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:33:00,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178936656] [2024-10-11 14:33:00,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:00,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:33:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:33:00,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:33:00,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178936656] [2024-10-11 14:33:00,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178936656] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:33:00,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:33:00,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 14:33:00,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552633808] [2024-10-11 14:33:00,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:33:00,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:33:00,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:33:00,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:33:00,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:33:00,813 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-10-11 14:33:00,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2024-10-11 14:33:00,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:33:00,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-10-11 14:33:00,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:33:01,274 INFO L124 PetriNetUnfolderBase]: 2317/3858 cut-off events. [2024-10-11 14:33:01,274 INFO L125 PetriNetUnfolderBase]: For 1970/1970 co-relation queries the response was YES. [2024-10-11 14:33:01,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8793 conditions, 3858 events. 2317/3858 cut-off events. For 1970/1970 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 26147 event pairs, 1724 based on Foata normal form. 106/3605 useless extension candidates. Maximal degree in co-relation 6840. Up to 2491 conditions per place. [2024-10-11 14:33:01,299 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 58 selfloop transitions, 5 changer transitions 2/82 dead transitions. [2024-10-11 14:33:01,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 82 transitions, 414 flow [2024-10-11 14:33:01,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:33:01,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:33:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-10-11 14:33:01,301 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-10-11 14:33:01,301 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 190 flow. Second operand 4 states and 136 transitions. [2024-10-11 14:33:01,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 82 transitions, 414 flow [2024-10-11 14:33:01,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 82 transitions, 410 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:33:01,304 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 216 flow [2024-10-11 14:33:01,305 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-10-11 14:33:01,306 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2024-10-11 14:33:01,307 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 216 flow [2024-10-11 14:33:01,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2024-10-11 14:33:01,308 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:33:01,310 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:33:01,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 14:33:01,310 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:33:01,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:33:01,311 INFO L85 PathProgramCache]: Analyzing trace with hash 354292929, now seen corresponding path program 1 times [2024-10-11 14:33:01,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:33:01,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994440174] [2024-10-11 14:33:01,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:01,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:33:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:33:01,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:33:01,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994440174] [2024-10-11 14:33:01,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994440174] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:33:01,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:33:01,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:33:01,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418850059] [2024-10-11 14:33:01,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:33:01,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:33:01,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:33:01,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:33:01,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:33:01,669 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-10-11 14:33:01,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 216 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 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) [2024-10-11 14:33:01,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:33:01,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-10-11 14:33:01,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:33:02,823 INFO L124 PetriNetUnfolderBase]: 6369/9864 cut-off events. [2024-10-11 14:33:02,824 INFO L125 PetriNetUnfolderBase]: For 4584/4712 co-relation queries the response was YES. [2024-10-11 14:33:02,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22780 conditions, 9864 events. 6369/9864 cut-off events. For 4584/4712 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 69801 event pairs, 2485 based on Foata normal form. 16/8921 useless extension candidates. Maximal degree in co-relation 18038. Up to 3399 conditions per place. [2024-10-11 14:33:02,874 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 89 selfloop transitions, 9 changer transitions 1/113 dead transitions. [2024-10-11 14:33:02,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 113 transitions, 593 flow [2024-10-11 14:33:02,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:33:02,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:33:02,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-10-11 14:33:02,876 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6366666666666667 [2024-10-11 14:33:02,877 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 216 flow. Second operand 6 states and 191 transitions. [2024-10-11 14:33:02,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 113 transitions, 593 flow [2024-10-11 14:33:02,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 113 transitions, 583 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-10-11 14:33:02,881 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 245 flow [2024-10-11 14:33:02,881 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=245, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2024-10-11 14:33:02,882 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2024-10-11 14:33:02,882 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 245 flow [2024-10-11 14:33:02,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 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) [2024-10-11 14:33:02,882 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:33:02,883 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:33:02,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 14:33:02,883 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:33:02,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:33:02,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1470062564, now seen corresponding path program 1 times [2024-10-11 14:33:02,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:33:02,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624228483] [2024-10-11 14:33:02,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:02,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:33:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:33:03,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:33:03,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624228483] [2024-10-11 14:33:03,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624228483] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:33:03,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:33:03,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:33:03,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160785513] [2024-10-11 14:33:03,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:33:03,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:33:03,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:33:03,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:33:03,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:33:03,245 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-10-11 14:33:03,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 245 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 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) [2024-10-11 14:33:03,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:33:03,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-10-11 14:33:03,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:33:04,203 INFO L124 PetriNetUnfolderBase]: 4709/7536 cut-off events. [2024-10-11 14:33:04,203 INFO L125 PetriNetUnfolderBase]: For 3991/4129 co-relation queries the response was YES. [2024-10-11 14:33:04,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17450 conditions, 7536 events. 4709/7536 cut-off events. For 3991/4129 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 52438 event pairs, 2035 based on Foata normal form. 6/6666 useless extension candidates. Maximal degree in co-relation 13639. Up to 3217 conditions per place. [2024-10-11 14:33:04,239 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 57 selfloop transitions, 7 changer transitions 29/107 dead transitions. [2024-10-11 14:33:04,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 107 transitions, 561 flow [2024-10-11 14:33:04,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:33:04,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:33:04,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-10-11 14:33:04,241 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-10-11 14:33:04,241 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 245 flow. Second operand 6 states and 189 transitions. [2024-10-11 14:33:04,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 107 transitions, 561 flow [2024-10-11 14:33:04,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 107 transitions, 551 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-10-11 14:33:04,247 INFO L231 Difference]: Finished difference. Result has 72 places, 57 transitions, 241 flow [2024-10-11 14:33:04,247 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2024-10-11 14:33:04,248 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 21 predicate places. [2024-10-11 14:33:04,248 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 241 flow [2024-10-11 14:33:04,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 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) [2024-10-11 14:33:04,249 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:33:04,249 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:33:04,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-11 14:33:04,249 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:33:04,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:33:04,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1298718439, now seen corresponding path program 1 times [2024-10-11 14:33:04,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:33:04,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733774677] [2024-10-11 14:33:04,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:04,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:33:04,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:33:04,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:33:04,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733774677] [2024-10-11 14:33:04,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733774677] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:33:04,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:33:04,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:33:04,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209002390] [2024-10-11 14:33:04,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:33:04,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:33:04,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:33:04,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:33:04,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:33:04,561 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-10-11 14:33:04,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 57 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 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) [2024-10-11 14:33:04,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:33:04,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-10-11 14:33:04,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:33:05,146 INFO L124 PetriNetUnfolderBase]: 2851/4744 cut-off events. [2024-10-11 14:33:05,146 INFO L125 PetriNetUnfolderBase]: For 3236/3236 co-relation queries the response was YES. [2024-10-11 14:33:05,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11628 conditions, 4744 events. 2851/4744 cut-off events. For 3236/3236 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 31184 event pairs, 449 based on Foata normal form. 248/4887 useless extension candidates. Maximal degree in co-relation 9057. Up to 2431 conditions per place. [2024-10-11 14:33:05,170 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 60 selfloop transitions, 7 changer transitions 1/83 dead transitions. [2024-10-11 14:33:05,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 83 transitions, 467 flow [2024-10-11 14:33:05,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:33:05,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:33:05,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-10-11 14:33:05,172 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5633333333333334 [2024-10-11 14:33:05,172 INFO L175 Difference]: Start difference. First operand has 72 places, 57 transitions, 241 flow. Second operand 6 states and 169 transitions. [2024-10-11 14:33:05,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 83 transitions, 467 flow [2024-10-11 14:33:05,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 446 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-10-11 14:33:05,191 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 232 flow [2024-10-11 14:33:05,191 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2024-10-11 14:33:05,192 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2024-10-11 14:33:05,192 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 232 flow [2024-10-11 14:33:05,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 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) [2024-10-11 14:33:05,192 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:33:05,192 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:33:05,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 14:33:05,193 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:33:05,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:33:05,193 INFO L85 PathProgramCache]: Analyzing trace with hash -2091064566, now seen corresponding path program 1 times [2024-10-11 14:33:05,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:33:05,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558237810] [2024-10-11 14:33:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:05,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:33:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:33:05,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:33:05,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558237810] [2024-10-11 14:33:05,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558237810] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:33:05,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:33:05,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:33:05,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089627951] [2024-10-11 14:33:05,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:33:05,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:33:05,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:33:05,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:33:05,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:33:05,510 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-10-11 14:33:05,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 232 flow. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 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) [2024-10-11 14:33:05,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:33:05,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-10-11 14:33:05,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:33:05,904 INFO L124 PetriNetUnfolderBase]: 1675/2662 cut-off events. [2024-10-11 14:33:05,905 INFO L125 PetriNetUnfolderBase]: For 2466/2600 co-relation queries the response was YES. [2024-10-11 14:33:05,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6948 conditions, 2662 events. 1675/2662 cut-off events. For 2466/2600 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15036 event pairs, 241 based on Foata normal form. 254/2843 useless extension candidates. Maximal degree in co-relation 5736. Up to 1489 conditions per place. [2024-10-11 14:33:05,922 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 60 selfloop transitions, 5 changer transitions 4/84 dead transitions. [2024-10-11 14:33:05,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 84 transitions, 470 flow [2024-10-11 14:33:05,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:33:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:33:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-10-11 14:33:05,924 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-10-11 14:33:05,924 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 232 flow. Second operand 6 states and 171 transitions. [2024-10-11 14:33:05,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 84 transitions, 470 flow [2024-10-11 14:33:05,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 84 transitions, 442 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-10-11 14:33:05,927 INFO L231 Difference]: Finished difference. Result has 66 places, 52 transitions, 196 flow [2024-10-11 14:33:05,928 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=66, PETRI_TRANSITIONS=52} [2024-10-11 14:33:05,929 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2024-10-11 14:33:05,929 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 52 transitions, 196 flow [2024-10-11 14:33:05,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 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) [2024-10-11 14:33:05,930 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:33:05,930 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:33:05,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 14:33:05,930 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:33:05,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:33:05,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1454480985, now seen corresponding path program 1 times [2024-10-11 14:33:05,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:33:05,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833975590] [2024-10-11 14:33:05,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:05,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:33:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 14:33:06,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:33:06,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833975590] [2024-10-11 14:33:06,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833975590] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:33:06,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247424328] [2024-10-11 14:33:06,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:06,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:33:06,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:33:06,195 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:33:06,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:33:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:06,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 14:33:06,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:33:06,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 14:33:06,440 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:33:06,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247424328] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:33:06,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 14:33:06,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-10-11 14:33:06,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123795602] [2024-10-11 14:33:06,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:33:06,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:33:06,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:33:06,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:33:06,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:33:06,454 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-10-11 14:33:06,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 52 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 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) [2024-10-11 14:33:06,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:33:06,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-10-11 14:33:06,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:33:07,027 INFO L124 PetriNetUnfolderBase]: 2193/3358 cut-off events. [2024-10-11 14:33:07,028 INFO L125 PetriNetUnfolderBase]: For 3279/3502 co-relation queries the response was YES. [2024-10-11 14:33:07,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8991 conditions, 3358 events. 2193/3358 cut-off events. For 3279/3502 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 18601 event pairs, 311 based on Foata normal form. 296/3626 useless extension candidates. Maximal degree in co-relation 8963. Up to 1219 conditions per place. [2024-10-11 14:33:07,054 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 75 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2024-10-11 14:33:07,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 101 transitions, 557 flow [2024-10-11 14:33:07,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:33:07,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:33:07,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-10-11 14:33:07,056 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-10-11 14:33:07,056 INFO L175 Difference]: Start difference. First operand has 66 places, 52 transitions, 196 flow. Second operand 6 states and 188 transitions. [2024-10-11 14:33:07,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 101 transitions, 557 flow [2024-10-11 14:33:07,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 101 transitions, 525 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-10-11 14:33:07,062 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 265 flow [2024-10-11 14:33:07,062 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2024-10-11 14:33:07,063 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2024-10-11 14:33:07,063 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 265 flow [2024-10-11 14:33:07,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 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) [2024-10-11 14:33:07,063 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:33:07,064 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:33:07,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 14:33:07,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 14:33:07,265 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:33:07,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:33:07,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1440231369, now seen corresponding path program 2 times [2024-10-11 14:33:07,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:33:07,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391510530] [2024-10-11 14:33:07,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:07,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:33:07,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 14:33:07,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:33:07,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391510530] [2024-10-11 14:33:07,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391510530] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:33:07,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88913591] [2024-10-11 14:33:07,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:33:07,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:33:07,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:33:07,604 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:33:07,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:33:07,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:33:07,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:33:07,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 14:33:07,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:33:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:33:07,976 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:33:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:33:08,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88913591] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:33:08,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:33:08,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 6] total 15 [2024-10-11 14:33:08,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479512218] [2024-10-11 14:33:08,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:33:08,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:33:08,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:33:08,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:33:08,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2024-10-11 14:33:08,228 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-10-11 14:33:08,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 265 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-10-11 14:33:08,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:33:08,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-10-11 14:33:08,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:33:09,087 INFO L124 PetriNetUnfolderBase]: 5613/8122 cut-off events. [2024-10-11 14:33:09,088 INFO L125 PetriNetUnfolderBase]: For 11868/12654 co-relation queries the response was YES. [2024-10-11 14:33:09,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24724 conditions, 8122 events. 5613/8122 cut-off events. For 11868/12654 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 45829 event pairs, 359 based on Foata normal form. 768/8493 useless extension candidates. Maximal degree in co-relation 24694. Up to 3182 conditions per place. [2024-10-11 14:33:09,150 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 106 selfloop transitions, 25 changer transitions 0/142 dead transitions. [2024-10-11 14:33:09,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 142 transitions, 878 flow [2024-10-11 14:33:09,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:33:09,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:33:09,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 239 transitions. [2024-10-11 14:33:09,152 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5311111111111111 [2024-10-11 14:33:09,152 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 265 flow. Second operand 9 states and 239 transitions. [2024-10-11 14:33:09,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 142 transitions, 878 flow [2024-10-11 14:33:09,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 142 transitions, 863 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-10-11 14:33:09,163 INFO L231 Difference]: Finished difference. Result has 78 places, 77 transitions, 470 flow [2024-10-11 14:33:09,164 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=470, PETRI_PLACES=78, PETRI_TRANSITIONS=77} [2024-10-11 14:33:09,165 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 27 predicate places. [2024-10-11 14:33:09,165 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 470 flow [2024-10-11 14:33:09,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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) [2024-10-11 14:33:09,166 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:33:09,166 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:33:09,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 14:33:09,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:33:09,370 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:33:09,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:33:09,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1658893055, now seen corresponding path program 1 times [2024-10-11 14:33:09,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:33:09,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260428233] [2024-10-11 14:33:09,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:09,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:33:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:33:09,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:33:09,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260428233] [2024-10-11 14:33:09,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260428233] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:33:09,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:33:09,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 14:33:09,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35429438] [2024-10-11 14:33:09,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:33:09,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:33:09,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:33:09,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:33:09,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:33:09,589 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-10-11 14:33:09,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 470 flow. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 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) [2024-10-11 14:33:09,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:33:09,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-10-11 14:33:09,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:33:10,766 INFO L124 PetriNetUnfolderBase]: 6848/10499 cut-off events. [2024-10-11 14:33:10,766 INFO L125 PetriNetUnfolderBase]: For 42472/44225 co-relation queries the response was YES. [2024-10-11 14:33:10,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40619 conditions, 10499 events. 6848/10499 cut-off events. For 42472/44225 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 67518 event pairs, 1038 based on Foata normal form. 1360/11459 useless extension candidates. Maximal degree in co-relation 40584. Up to 3697 conditions per place. [2024-10-11 14:33:10,851 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 118 selfloop transitions, 15 changer transitions 0/156 dead transitions. [2024-10-11 14:33:10,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 156 transitions, 1284 flow [2024-10-11 14:33:10,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:33:10,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:33:10,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-10-11 14:33:10,853 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-10-11 14:33:10,853 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 470 flow. Second operand 6 states and 192 transitions. [2024-10-11 14:33:10,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 156 transitions, 1284 flow [2024-10-11 14:33:10,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 156 transitions, 1266 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-10-11 14:33:10,895 INFO L231 Difference]: Finished difference. Result has 85 places, 87 transitions, 595 flow [2024-10-11 14:33:10,897 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=595, PETRI_PLACES=85, PETRI_TRANSITIONS=87} [2024-10-11 14:33:10,897 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 34 predicate places. [2024-10-11 14:33:10,898 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 87 transitions, 595 flow [2024-10-11 14:33:10,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 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) [2024-10-11 14:33:10,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:33:10,898 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:33:10,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-11 14:33:10,900 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:33:10,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:33:10,900 INFO L85 PathProgramCache]: Analyzing trace with hash -769526555, now seen corresponding path program 2 times [2024-10-11 14:33:10,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:33:10,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358141720] [2024-10-11 14:33:10,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:10,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:33:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 14:33:11,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:33:11,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358141720] [2024-10-11 14:33:11,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358141720] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:33:11,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:33:11,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:33:11,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891834506] [2024-10-11 14:33:11,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:33:11,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:33:11,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:33:11,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:33:11,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:33:11,218 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-10-11 14:33:11,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 595 flow. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 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) [2024-10-11 14:33:11,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:33:11,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-10-11 14:33:11,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:33:12,465 INFO L124 PetriNetUnfolderBase]: 7222/11158 cut-off events. [2024-10-11 14:33:12,465 INFO L125 PetriNetUnfolderBase]: For 56720/58227 co-relation queries the response was YES. [2024-10-11 14:33:12,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47595 conditions, 11158 events. 7222/11158 cut-off events. For 56720/58227 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 72018 event pairs, 1480 based on Foata normal form. 1243/12063 useless extension candidates. Maximal degree in co-relation 47555. Up to 7424 conditions per place. [2024-10-11 14:33:12,583 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 112 selfloop transitions, 8 changer transitions 0/143 dead transitions. [2024-10-11 14:33:12,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 143 transitions, 1266 flow [2024-10-11 14:33:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:33:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:33:12,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-10-11 14:33:12,585 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-10-11 14:33:12,586 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 595 flow. Second operand 7 states and 200 transitions. [2024-10-11 14:33:12,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 143 transitions, 1266 flow [2024-10-11 14:33:12,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 143 transitions, 1255 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-10-11 14:33:12,637 INFO L231 Difference]: Finished difference. Result has 92 places, 88 transitions, 620 flow [2024-10-11 14:33:12,638 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=620, PETRI_PLACES=92, PETRI_TRANSITIONS=88} [2024-10-11 14:33:12,638 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 41 predicate places. [2024-10-11 14:33:12,639 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 88 transitions, 620 flow [2024-10-11 14:33:12,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 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) [2024-10-11 14:33:12,639 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:33:12,639 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:33:12,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-11 14:33:12,640 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:33:12,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:33:12,640 INFO L85 PathProgramCache]: Analyzing trace with hash 356044648, now seen corresponding path program 1 times [2024-10-11 14:33:12,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:33:12,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089144276] [2024-10-11 14:33:12,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:12,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:33:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:33:15,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:33:15,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089144276] [2024-10-11 14:33:15,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089144276] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:33:15,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826738845] [2024-10-11 14:33:15,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:15,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:33:15,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:33:15,169 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:33:15,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:33:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:15,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-11 14:33:15,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:33:15,886 INFO L349 Elim1Store]: treesize reduction 16, result has 69.8 percent of original size [2024-10-11 14:33:15,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 50 [2024-10-11 14:33:15,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:33:15,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:16,808 INFO L349 Elim1Store]: treesize reduction 19, result has 92.5 percent of original size [2024-10-11 14:34:16,809 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 250 [2024-10-11 14:34:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:34:22,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826738845] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:34:22,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:34:22,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 20 [2024-10-11 14:34:22,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829756619] [2024-10-11 14:34:22,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:34:22,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 14:34:22,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:22,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 14:34:22,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=356, Unknown=15, NotChecked=0, Total=420