./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe024_tso.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_236f0455-2768-43fb-85d5-e96abcdfaee1/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_236f0455-2768-43fb-85d5-e96abcdfaee1/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_236f0455-2768-43fb-85d5-e96abcdfaee1/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_236f0455-2768-43fb-85d5-e96abcdfaee1/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe024_tso.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_236f0455-2768-43fb-85d5-e96abcdfaee1/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_236f0455-2768-43fb-85d5-e96abcdfaee1/bin/uautomizer-verify-bycVGegfSx --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 f830c559346dfed293d38cb3f451f57bf45496349320c2696ae4150a4c0c44e9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 21:05:02,392 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 21:05:02,559 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_236f0455-2768-43fb-85d5-e96abcdfaee1/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 21:05:02,568 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 21:05:02,569 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 21:05:02,608 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 21:05:02,609 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 21:05:02,610 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 21:05:02,611 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 21:05:02,616 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 21:05:02,617 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 21:05:02,617 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 21:05:02,618 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 21:05:02,620 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 21:05:02,621 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 21:05:02,621 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 21:05:02,622 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 21:05:02,622 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 21:05:02,622 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 21:05:02,623 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 21:05:02,623 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 21:05:02,624 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 21:05:02,624 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 21:05:02,625 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 21:05:02,625 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 21:05:02,626 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 21:05:02,626 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 21:05:02,627 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 21:05:02,627 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 21:05:02,628 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 21:05:02,629 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 21:05:02,630 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:05:02,630 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 21:05:02,630 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 21:05:02,630 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 21:05:02,631 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 21:05:02,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 21:05:02,631 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 21:05:02,631 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 21:05:02,632 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 21:05:02,632 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 21:05:02,632 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 21:05:02,633 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_236f0455-2768-43fb-85d5-e96abcdfaee1/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_236f0455-2768-43fb-85d5-e96abcdfaee1/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f830c559346dfed293d38cb3f451f57bf45496349320c2696ae4150a4c0c44e9 [2023-11-21 21:05:02,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 21:05:02,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 21:05:03,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 21:05:03,003 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 21:05:03,003 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 21:05:03,005 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_236f0455-2768-43fb-85d5-e96abcdfaee1/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/pthread-wmm/safe024_tso.i [2023-11-21 21:05:06,063 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 21:05:06,394 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 21:05:06,409 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_236f0455-2768-43fb-85d5-e96abcdfaee1/sv-benchmarks/c/pthread-wmm/safe024_tso.i [2023-11-21 21:05:06,432 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_236f0455-2768-43fb-85d5-e96abcdfaee1/bin/uautomizer-verify-bycVGegfSx/data/5a631f1af/3011ad3d0a7c437797fc9c4f6f3d957f/FLAGc17750d63 [2023-11-21 21:05:06,448 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_236f0455-2768-43fb-85d5-e96abcdfaee1/bin/uautomizer-verify-bycVGegfSx/data/5a631f1af/3011ad3d0a7c437797fc9c4f6f3d957f [2023-11-21 21:05:06,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 21:05:06,458 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 21:05:06,461 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 21:05:06,461 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 21:05:06,467 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 21:05:06,468 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:05:06" (1/1) ... [2023-11-21 21:05:06,469 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30d713f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:06, skipping insertion in model container [2023-11-21 21:05:06,469 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:05:06" (1/1) ... [2023-11-21 21:05:06,525 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 21:05:06,695 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_236f0455-2768-43fb-85d5-e96abcdfaee1/sv-benchmarks/c/pthread-wmm/safe024_tso.i[945,958] [2023-11-21 21:05:06,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:05:06,988 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 21:05:06,999 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_236f0455-2768-43fb-85d5-e96abcdfaee1/sv-benchmarks/c/pthread-wmm/safe024_tso.i[945,958] [2023-11-21 21:05:07,032 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:05:07,065 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 21:05:07,065 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 21:05:07,074 INFO L206 MainTranslator]: Completed translation [2023-11-21 21:05:07,075 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:07 WrapperNode [2023-11-21 21:05:07,075 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 21:05:07,076 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 21:05:07,077 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 21:05:07,077 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 21:05:07,085 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:07" (1/1) ... [2023-11-21 21:05:07,100 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:07" (1/1) ... [2023-11-21 21:05:07,125 INFO L138 Inliner]: procedures = 176, calls = 55, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2023-11-21 21:05:07,125 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 21:05:07,126 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 21:05:07,126 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 21:05:07,127 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 21:05:07,138 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:07" (1/1) ... [2023-11-21 21:05:07,139 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:07" (1/1) ... [2023-11-21 21:05:07,142 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:07" (1/1) ... [2023-11-21 21:05:07,156 INFO L187 HeapSplitter]: Split 5 memory accesses to 4 slices as follows [2, 1, 1, 1] [2023-11-21 21:05:07,157 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:07" (1/1) ... [2023-11-21 21:05:07,157 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:07" (1/1) ... [2023-11-21 21:05:07,164 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:07" (1/1) ... [2023-11-21 21:05:07,182 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:07" (1/1) ... [2023-11-21 21:05:07,184 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:07" (1/1) ... [2023-11-21 21:05:07,185 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:07" (1/1) ... [2023-11-21 21:05:07,199 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 21:05:07,200 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 21:05:07,200 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 21:05:07,200 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 21:05:07,201 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:07" (1/1) ... [2023-11-21 21:05:07,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:05:07,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_236f0455-2768-43fb-85d5-e96abcdfaee1/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:05:07,244 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_236f0455-2768-43fb-85d5-e96abcdfaee1/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 21:05:07,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_236f0455-2768-43fb-85d5-e96abcdfaee1/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 21:05:07,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-21 21:05:07,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-21 21:05:07,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-21 21:05:07,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-21 21:05:07,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-21 21:05:07,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 21:05:07,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 21:05:07,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 21:05:07,291 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-21 21:05:07,291 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-21 21:05:07,291 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-21 21:05:07,291 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-21 21:05:07,291 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-21 21:05:07,292 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-21 21:05:07,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 21:05:07,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 21:05:07,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-21 21:05:07,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-21 21:05:07,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-21 21:05:07,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 21:05:07,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 21:05:07,295 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 21:05:07,509 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 21:05:07,512 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 21:05:07,688 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 21:05:07,788 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 21:05:07,788 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 21:05:07,790 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:05:07 BoogieIcfgContainer [2023-11-21 21:05:07,790 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 21:05:07,793 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 21:05:07,794 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 21:05:07,797 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 21:05:07,797 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:05:06" (1/3) ... [2023-11-21 21:05:07,798 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@498d9bba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:05:07, skipping insertion in model container [2023-11-21 21:05:07,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:07" (2/3) ... [2023-11-21 21:05:07,799 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@498d9bba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:05:07, skipping insertion in model container [2023-11-21 21:05:07,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:05:07" (3/3) ... [2023-11-21 21:05:07,800 INFO L112 eAbstractionObserver]: Analyzing ICFG safe024_tso.i [2023-11-21 21:05:07,810 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-21 21:05:07,822 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 21:05:07,822 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 21:05:07,822 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 21:05:07,869 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 21:05:07,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 39 transitions, 90 flow [2023-11-21 21:05:07,942 INFO L124 PetriNetUnfolderBase]: 1/36 cut-off events. [2023-11-21 21:05:07,943 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 21:05:07,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 36 events. 1/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2023-11-21 21:05:07,948 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 39 transitions, 90 flow [2023-11-21 21:05:07,952 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2023-11-21 21:05:07,963 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 21:05:07,970 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5f92c40f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 21:05:07,981 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-21 21:05:07,996 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 21:05:08,000 INFO L124 PetriNetUnfolderBase]: 0/32 cut-off events. [2023-11-21 21:05:08,000 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 21:05:08,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:05:08,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:05:08,002 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-21 21:05:08,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:08,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1256363128, now seen corresponding path program 1 times [2023-11-21 21:05:08,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:05:08,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692451134] [2023-11-21 21:05:08,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:08,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:05:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:05:08,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:05:08,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692451134] [2023-11-21 21:05:08,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692451134] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:05:08,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:05:08,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 21:05:08,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969106531] [2023-11-21 21:05:08,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:05:08,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 21:05:08,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:05:08,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 21:05:08,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 21:05:08,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 39 [2023-11-21 21:05:08,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 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) [2023-11-21 21:05:08,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:05:08,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 39 [2023-11-21 21:05:08,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:05:09,287 INFO L124 PetriNetUnfolderBase]: 326/635 cut-off events. [2023-11-21 21:05:09,287 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-21 21:05:09,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1191 conditions, 635 events. 326/635 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3788 event pairs, 166 based on Foata normal form. 24/642 useless extension candidates. Maximal degree in co-relation 1180. Up to 397 conditions per place. [2023-11-21 21:05:09,298 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 23 selfloop transitions, 3 changer transitions 21/63 dead transitions. [2023-11-21 21:05:09,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 63 transitions, 235 flow [2023-11-21 21:05:09,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 21:05:09,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 21:05:09,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2023-11-21 21:05:09,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-21 21:05:09,314 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 182 transitions. [2023-11-21 21:05:09,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 182 transitions. [2023-11-21 21:05:09,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:05:09,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 182 transitions. [2023-11-21 21:05:09,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 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) [2023-11-21 21:05:09,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 39.0) internal successors, (312), 8 states have internal predecessors, (312), 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) [2023-11-21 21:05:09,327 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 39.0) internal successors, (312), 8 states have internal predecessors, (312), 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) [2023-11-21 21:05:09,329 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 7 states and 182 transitions. [2023-11-21 21:05:09,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 63 transitions, 235 flow [2023-11-21 21:05:09,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 230 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-21 21:05:09,336 INFO L231 Difference]: Finished difference. Result has 51 places, 35 transitions, 107 flow [2023-11-21 21:05:09,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=107, PETRI_PLACES=51, PETRI_TRANSITIONS=35} [2023-11-21 21:05:09,342 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2023-11-21 21:05:09,342 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 35 transitions, 107 flow [2023-11-21 21:05:09,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 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) [2023-11-21 21:05:09,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:05:09,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:05:09,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 21:05:09,344 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-21 21:05:09,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:09,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1605472185, now seen corresponding path program 1 times [2023-11-21 21:05:09,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:05:09,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061516394] [2023-11-21 21:05:09,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:09,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:05:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:05:09,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:05:09,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061516394] [2023-11-21 21:05:09,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061516394] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:05:09,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:05:09,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 21:05:09,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047684051] [2023-11-21 21:05:09,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:05:09,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 21:05:09,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:05:09,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 21:05:09,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 21:05:09,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 39 [2023-11-21 21:05:09,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 35 transitions, 107 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:05:09,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:05:09,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 39 [2023-11-21 21:05:09,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:05:10,277 INFO L124 PetriNetUnfolderBase]: 599/1166 cut-off events. [2023-11-21 21:05:10,278 INFO L125 PetriNetUnfolderBase]: For 832/832 co-relation queries the response was YES. [2023-11-21 21:05:10,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2781 conditions, 1166 events. 599/1166 cut-off events. For 832/832 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7439 event pairs, 57 based on Foata normal form. 33/1177 useless extension candidates. Maximal degree in co-relation 2766. Up to 489 conditions per place. [2023-11-21 21:05:10,295 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 45 selfloop transitions, 11 changer transitions 42/113 dead transitions. [2023-11-21 21:05:10,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 113 transitions, 591 flow [2023-11-21 21:05:10,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 21:05:10,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-21 21:05:10,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 334 transitions. [2023-11-21 21:05:10,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6587771203155819 [2023-11-21 21:05:10,303 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 334 transitions. [2023-11-21 21:05:10,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 334 transitions. [2023-11-21 21:05:10,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:05:10,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 334 transitions. [2023-11-21 21:05:10,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 25.692307692307693) internal successors, (334), 13 states have internal predecessors, (334), 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) [2023-11-21 21:05:10,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 39.0) internal successors, (546), 14 states have internal predecessors, (546), 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) [2023-11-21 21:05:10,318 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 39.0) internal successors, (546), 14 states have internal predecessors, (546), 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) [2023-11-21 21:05:10,319 INFO L175 Difference]: Start difference. First operand has 51 places, 35 transitions, 107 flow. Second operand 13 states and 334 transitions. [2023-11-21 21:05:10,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 113 transitions, 591 flow [2023-11-21 21:05:10,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 113 transitions, 562 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-11-21 21:05:10,335 INFO L231 Difference]: Finished difference. Result has 67 places, 43 transitions, 224 flow [2023-11-21 21:05:10,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=224, PETRI_PLACES=67, PETRI_TRANSITIONS=43} [2023-11-21 21:05:10,342 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2023-11-21 21:05:10,342 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 43 transitions, 224 flow [2023-11-21 21:05:10,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:05:10,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:05:10,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:05:10,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 21:05:10,343 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-21 21:05:10,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:10,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1390274138, now seen corresponding path program 1 times [2023-11-21 21:05:10,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:05:10,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810252961] [2023-11-21 21:05:10,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:10,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:05:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:05:10,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:05:10,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810252961] [2023-11-21 21:05:10,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810252961] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:05:10,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:05:10,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 21:05:10,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270814419] [2023-11-21 21:05:10,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:05:10,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 21:05:10,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:05:10,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 21:05:10,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-21 21:05:10,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 39 [2023-11-21 21:05:10,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 43 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 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) [2023-11-21 21:05:10,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:05:10,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 39 [2023-11-21 21:05:10,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:05:11,071 INFO L124 PetriNetUnfolderBase]: 597/1176 cut-off events. [2023-11-21 21:05:11,071 INFO L125 PetriNetUnfolderBase]: For 4949/4952 co-relation queries the response was YES. [2023-11-21 21:05:11,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4247 conditions, 1176 events. 597/1176 cut-off events. For 4949/4952 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7681 event pairs, 103 based on Foata normal form. 48/1196 useless extension candidates. Maximal degree in co-relation 4222. Up to 307 conditions per place. [2023-11-21 21:05:11,085 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 26 selfloop transitions, 5 changer transitions 55/101 dead transitions. [2023-11-21 21:05:11,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 101 transitions, 824 flow [2023-11-21 21:05:11,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 21:05:11,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-21 21:05:11,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2023-11-21 21:05:11,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6512820512820513 [2023-11-21 21:05:11,088 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 254 transitions. [2023-11-21 21:05:11,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 254 transitions. [2023-11-21 21:05:11,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:05:11,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 254 transitions. [2023-11-21 21:05:11,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 25.4) internal successors, (254), 10 states have internal predecessors, (254), 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) [2023-11-21 21:05:11,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 39.0) internal successors, (429), 11 states have internal predecessors, (429), 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) [2023-11-21 21:05:11,094 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 39.0) internal successors, (429), 11 states have internal predecessors, (429), 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) [2023-11-21 21:05:11,094 INFO L175 Difference]: Start difference. First operand has 67 places, 43 transitions, 224 flow. Second operand 10 states and 254 transitions. [2023-11-21 21:05:11,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 101 transitions, 824 flow [2023-11-21 21:05:11,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 101 transitions, 704 flow, removed 55 selfloop flow, removed 7 redundant places. [2023-11-21 21:05:11,116 INFO L231 Difference]: Finished difference. Result has 69 places, 37 transitions, 179 flow [2023-11-21 21:05:11,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=179, PETRI_PLACES=69, PETRI_TRANSITIONS=37} [2023-11-21 21:05:11,118 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2023-11-21 21:05:11,118 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 37 transitions, 179 flow [2023-11-21 21:05:11,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 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) [2023-11-21 21:05:11,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:05:11,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:05:11,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 21:05:11,119 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-21 21:05:11,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:11,120 INFO L85 PathProgramCache]: Analyzing trace with hash -2111235377, now seen corresponding path program 1 times [2023-11-21 21:05:11,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:05:11,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592142281] [2023-11-21 21:05:11,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:11,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:05:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:05:11,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:05:11,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592142281] [2023-11-21 21:05:11,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592142281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:05:11,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:05:11,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 21:05:11,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55020200] [2023-11-21 21:05:11,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:05:11,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 21:05:11,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:05:11,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 21:05:11,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 21:05:11,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 39 [2023-11-21 21:05:11,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 37 transitions, 179 flow. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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) [2023-11-21 21:05:11,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:05:11,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 39 [2023-11-21 21:05:11,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:05:11,504 INFO L124 PetriNetUnfolderBase]: 438/859 cut-off events. [2023-11-21 21:05:11,504 INFO L125 PetriNetUnfolderBase]: For 1975/2017 co-relation queries the response was YES. [2023-11-21 21:05:11,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2465 conditions, 859 events. 438/859 cut-off events. For 1975/2017 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 4831 event pairs, 135 based on Foata normal form. 35/845 useless extension candidates. Maximal degree in co-relation 2437. Up to 349 conditions per place. [2023-11-21 21:05:11,520 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 26 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2023-11-21 21:05:11,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 52 transitions, 275 flow [2023-11-21 21:05:11,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 21:05:11,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 21:05:11,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2023-11-21 21:05:11,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2023-11-21 21:05:11,522 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 117 transitions. [2023-11-21 21:05:11,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 117 transitions. [2023-11-21 21:05:11,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:05:11,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 117 transitions. [2023-11-21 21:05:11,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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) [2023-11-21 21:05:11,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 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) [2023-11-21 21:05:11,524 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 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) [2023-11-21 21:05:11,525 INFO L175 Difference]: Start difference. First operand has 69 places, 37 transitions, 179 flow. Second operand 4 states and 117 transitions. [2023-11-21 21:05:11,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 52 transitions, 275 flow [2023-11-21 21:05:11,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 243 flow, removed 10 selfloop flow, removed 11 redundant places. [2023-11-21 21:05:11,537 INFO L231 Difference]: Finished difference. Result has 57 places, 41 transitions, 185 flow [2023-11-21 21:05:11,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=185, PETRI_PLACES=57, PETRI_TRANSITIONS=41} [2023-11-21 21:05:11,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2023-11-21 21:05:11,540 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 41 transitions, 185 flow [2023-11-21 21:05:11,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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) [2023-11-21 21:05:11,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:05:11,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:05:11,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 21:05:11,541 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-21 21:05:11,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:11,542 INFO L85 PathProgramCache]: Analyzing trace with hash -120377910, now seen corresponding path program 1 times [2023-11-21 21:05:11,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:05:11,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155628126] [2023-11-21 21:05:11,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:11,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:05:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:05:11,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:05:11,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155628126] [2023-11-21 21:05:11,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155628126] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:05:11,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:05:11,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 21:05:11,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40747980] [2023-11-21 21:05:11,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:05:11,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 21:05:11,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:05:11,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 21:05:11,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 21:05:11,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 39 [2023-11-21 21:05:11,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 41 transitions, 185 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 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) [2023-11-21 21:05:11,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:05:11,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 39 [2023-11-21 21:05:11,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:05:11,906 INFO L124 PetriNetUnfolderBase]: 354/728 cut-off events. [2023-11-21 21:05:11,906 INFO L125 PetriNetUnfolderBase]: For 874/1178 co-relation queries the response was YES. [2023-11-21 21:05:11,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2047 conditions, 728 events. 354/728 cut-off events. For 874/1178 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3843 event pairs, 33 based on Foata normal form. 41/727 useless extension candidates. Maximal degree in co-relation 2026. Up to 272 conditions per place. [2023-11-21 21:05:11,916 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 33 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2023-11-21 21:05:11,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 62 transitions, 330 flow [2023-11-21 21:05:11,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 21:05:11,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 21:05:11,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2023-11-21 21:05:11,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7589743589743589 [2023-11-21 21:05:11,918 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 148 transitions. [2023-11-21 21:05:11,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 148 transitions. [2023-11-21 21:05:11,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:05:11,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 148 transitions. [2023-11-21 21:05:11,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 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) [2023-11-21 21:05:11,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 39.0) internal successors, (234), 6 states have internal predecessors, (234), 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) [2023-11-21 21:05:11,920 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 39.0) internal successors, (234), 6 states have internal predecessors, (234), 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) [2023-11-21 21:05:11,920 INFO L175 Difference]: Start difference. First operand has 57 places, 41 transitions, 185 flow. Second operand 5 states and 148 transitions. [2023-11-21 21:05:11,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 62 transitions, 330 flow [2023-11-21 21:05:11,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 62 transitions, 318 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-21 21:05:11,926 INFO L231 Difference]: Finished difference. Result has 60 places, 45 transitions, 228 flow [2023-11-21 21:05:11,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=228, PETRI_PLACES=60, PETRI_TRANSITIONS=45} [2023-11-21 21:05:11,928 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2023-11-21 21:05:11,929 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 228 flow [2023-11-21 21:05:11,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 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) [2023-11-21 21:05:11,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:05:11,930 INFO L208 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] [2023-11-21 21:05:11,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 21:05:11,930 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-21 21:05:11,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:11,931 INFO L85 PathProgramCache]: Analyzing trace with hash -43154474, now seen corresponding path program 1 times [2023-11-21 21:05:11,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:05:11,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741230536] [2023-11-21 21:05:11,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:11,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:05:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:05:12,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:05:12,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741230536] [2023-11-21 21:05:12,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741230536] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:05:12,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:05:12,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 21:05:12,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346258635] [2023-11-21 21:05:12,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:05:12,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 21:05:12,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:05:12,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 21:05:12,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-21 21:05:12,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 39 [2023-11-21 21:05:12,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 45 transitions, 228 flow. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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) [2023-11-21 21:05:12,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:05:12,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 39 [2023-11-21 21:05:12,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:05:12,338 INFO L124 PetriNetUnfolderBase]: 270/536 cut-off events. [2023-11-21 21:05:12,338 INFO L125 PetriNetUnfolderBase]: For 921/1553 co-relation queries the response was YES. [2023-11-21 21:05:12,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1675 conditions, 536 events. 270/536 cut-off events. For 921/1553 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2402 event pairs, 13 based on Foata normal form. 38/536 useless extension candidates. Maximal degree in co-relation 1653. Up to 200 conditions per place. [2023-11-21 21:05:12,345 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 32 selfloop transitions, 11 changer transitions 0/64 dead transitions. [2023-11-21 21:05:12,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 64 transitions, 363 flow [2023-11-21 21:05:12,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 21:05:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 21:05:12,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2023-11-21 21:05:12,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7307692307692307 [2023-11-21 21:05:12,347 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 171 transitions. [2023-11-21 21:05:12,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 171 transitions. [2023-11-21 21:05:12,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:05:12,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 171 transitions. [2023-11-21 21:05:12,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 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) [2023-11-21 21:05:12,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 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) [2023-11-21 21:05:12,350 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 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) [2023-11-21 21:05:12,350 INFO L175 Difference]: Start difference. First operand has 60 places, 45 transitions, 228 flow. Second operand 6 states and 171 transitions. [2023-11-21 21:05:12,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 64 transitions, 363 flow [2023-11-21 21:05:12,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 64 transitions, 334 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-11-21 21:05:12,355 INFO L231 Difference]: Finished difference. Result has 64 places, 46 transitions, 244 flow [2023-11-21 21:05:12,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=244, PETRI_PLACES=64, PETRI_TRANSITIONS=46} [2023-11-21 21:05:12,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2023-11-21 21:05:12,359 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 46 transitions, 244 flow [2023-11-21 21:05:12,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 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) [2023-11-21 21:05:12,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:05:12,360 INFO L208 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] [2023-11-21 21:05:12,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 21:05:12,360 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-21 21:05:12,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:12,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1892640117, now seen corresponding path program 1 times [2023-11-21 21:05:12,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:05:12,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139356117] [2023-11-21 21:05:12,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:12,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:05:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:05:12,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:05:12,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139356117] [2023-11-21 21:05:12,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139356117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:05:12,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:05:12,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 21:05:12,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487181795] [2023-11-21 21:05:12,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:05:12,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 21:05:12,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:05:12,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 21:05:12,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 21:05:12,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 39 [2023-11-21 21:05:12,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 46 transitions, 244 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 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) [2023-11-21 21:05:12,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:05:12,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 39 [2023-11-21 21:05:12,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:05:12,926 INFO L124 PetriNetUnfolderBase]: 374/896 cut-off events. [2023-11-21 21:05:12,926 INFO L125 PetriNetUnfolderBase]: For 1680/1814 co-relation queries the response was YES. [2023-11-21 21:05:12,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2619 conditions, 896 events. 374/896 cut-off events. For 1680/1814 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5681 event pairs, 101 based on Foata normal form. 13/807 useless extension candidates. Maximal degree in co-relation 2596. Up to 281 conditions per place. [2023-11-21 21:05:12,934 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 18 selfloop transitions, 1 changer transitions 22/67 dead transitions. [2023-11-21 21:05:12,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 67 transitions, 384 flow [2023-11-21 21:05:12,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 21:05:12,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 21:05:12,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2023-11-21 21:05:12,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6752136752136753 [2023-11-21 21:05:12,936 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 158 transitions. [2023-11-21 21:05:12,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 158 transitions. [2023-11-21 21:05:12,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:05:12,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 158 transitions. [2023-11-21 21:05:12,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 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) [2023-11-21 21:05:12,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 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) [2023-11-21 21:05:12,938 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 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) [2023-11-21 21:05:12,938 INFO L175 Difference]: Start difference. First operand has 64 places, 46 transitions, 244 flow. Second operand 6 states and 158 transitions. [2023-11-21 21:05:12,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 67 transitions, 384 flow [2023-11-21 21:05:12,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 348 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-11-21 21:05:12,946 INFO L231 Difference]: Finished difference. Result has 68 places, 42 transitions, 203 flow [2023-11-21 21:05:12,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=203, PETRI_PLACES=68, PETRI_TRANSITIONS=42} [2023-11-21 21:05:12,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2023-11-21 21:05:12,947 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 42 transitions, 203 flow [2023-11-21 21:05:12,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 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) [2023-11-21 21:05:12,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:05:12,947 INFO L208 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] [2023-11-21 21:05:12,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 21:05:12,948 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-21 21:05:12,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:12,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1900178669, now seen corresponding path program 2 times [2023-11-21 21:05:12,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:05:12,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842541811] [2023-11-21 21:05:12,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:12,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:05:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:05:13,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:05:13,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842541811] [2023-11-21 21:05:13,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842541811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:05:13,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:05:13,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 21:05:13,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072745246] [2023-11-21 21:05:13,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:05:13,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 21:05:13,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:05:13,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 21:05:13,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 21:05:13,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 39 [2023-11-21 21:05:13,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 42 transitions, 203 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 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) [2023-11-21 21:05:13,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:05:13,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 39 [2023-11-21 21:05:13,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:05:13,277 INFO L124 PetriNetUnfolderBase]: 157/405 cut-off events. [2023-11-21 21:05:13,277 INFO L125 PetriNetUnfolderBase]: For 485/549 co-relation queries the response was YES. [2023-11-21 21:05:13,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1124 conditions, 405 events. 157/405 cut-off events. For 485/549 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2067 event pairs, 8 based on Foata normal form. 11/375 useless extension candidates. Maximal degree in co-relation 1108. Up to 163 conditions per place. [2023-11-21 21:05:13,280 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 0 selfloop transitions, 0 changer transitions 52/52 dead transitions. [2023-11-21 21:05:13,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 52 transitions, 277 flow [2023-11-21 21:05:13,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 21:05:13,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 21:05:13,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2023-11-21 21:05:13,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2023-11-21 21:05:13,282 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 148 transitions. [2023-11-21 21:05:13,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 148 transitions. [2023-11-21 21:05:13,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:05:13,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 148 transitions. [2023-11-21 21:05:13,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 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) [2023-11-21 21:05:13,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 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) [2023-11-21 21:05:13,284 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 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) [2023-11-21 21:05:13,284 INFO L175 Difference]: Start difference. First operand has 68 places, 42 transitions, 203 flow. Second operand 6 states and 148 transitions. [2023-11-21 21:05:13,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 52 transitions, 277 flow [2023-11-21 21:05:13,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 52 transitions, 268 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-21 21:05:13,288 INFO L231 Difference]: Finished difference. Result has 62 places, 0 transitions, 0 flow [2023-11-21 21:05:13,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=62, PETRI_TRANSITIONS=0} [2023-11-21 21:05:13,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2023-11-21 21:05:13,289 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 0 transitions, 0 flow [2023-11-21 21:05:13,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 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) [2023-11-21 21:05:13,291 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-11-21 21:05:13,292 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-11-21 21:05:13,292 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-11-21 21:05:13,292 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-11-21 21:05:13,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 21:05:13,293 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2023-11-21 21:05:13,296 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-21 21:05:13,296 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-21 21:05:13,302 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 09:05:13 BasicIcfg [2023-11-21 21:05:13,302 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-21 21:05:13,302 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-21 21:05:13,302 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-21 21:05:13,302 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-21 21:05:13,303 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:05:07" (3/4) ... [2023-11-21 21:05:13,305 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-21 21:05:13,308 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2023-11-21 21:05:13,308 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2023-11-21 21:05:13,308 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2023-11-21 21:05:13,312 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 36 nodes and edges [2023-11-21 21:05:13,313 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-11-21 21:05:13,313 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-21 21:05:13,313 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-21 21:05:13,391 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_236f0455-2768-43fb-85d5-e96abcdfaee1/bin/uautomizer-verify-bycVGegfSx/witness.graphml [2023-11-21 21:05:13,391 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_236f0455-2768-43fb-85d5-e96abcdfaee1/bin/uautomizer-verify-bycVGegfSx/witness.yml [2023-11-21 21:05:13,391 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-21 21:05:13,392 INFO L158 Benchmark]: Toolchain (without parser) took 6934.48ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 136.4MB in the beginning and 84.8MB in the end (delta: 51.6MB). Peak memory consumption was 85.8MB. Max. memory is 16.1GB. [2023-11-21 21:05:13,392 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 130.0MB. Free memory is still 89.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 21:05:13,393 INFO L158 Benchmark]: CACSL2BoogieTranslator took 614.53ms. Allocated memory is still 167.8MB. Free memory was 136.4MB in the beginning and 115.4MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-11-21 21:05:13,393 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.07ms. Allocated memory is still 167.8MB. Free memory was 115.4MB in the beginning and 113.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 21:05:13,393 INFO L158 Benchmark]: Boogie Preprocessor took 73.00ms. Allocated memory is still 167.8MB. Free memory was 113.4MB in the beginning and 111.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 21:05:13,394 INFO L158 Benchmark]: RCFGBuilder took 591.00ms. Allocated memory is still 167.8MB. Free memory was 111.3MB in the beginning and 89.3MB in the end (delta: 22.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-11-21 21:05:13,394 INFO L158 Benchmark]: TraceAbstraction took 5508.58ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 88.9MB in the beginning and 89.0MB in the end (delta: -154.5kB). Peak memory consumption was 35.5MB. Max. memory is 16.1GB. [2023-11-21 21:05:13,395 INFO L158 Benchmark]: Witness Printer took 89.24ms. Allocated memory is still 201.3MB. Free memory was 89.0MB in the beginning and 84.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-21 21:05:13,397 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 130.0MB. Free memory is still 89.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 614.53ms. Allocated memory is still 167.8MB. Free memory was 136.4MB in the beginning and 115.4MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.07ms. Allocated memory is still 167.8MB. Free memory was 115.4MB in the beginning and 113.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 73.00ms. Allocated memory is still 167.8MB. Free memory was 113.4MB in the beginning and 111.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 591.00ms. Allocated memory is still 167.8MB. Free memory was 111.3MB in the beginning and 89.3MB in the end (delta: 22.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 5508.58ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 88.9MB in the beginning and 89.0MB in the end (delta: -154.5kB). Peak memory consumption was 35.5MB. Max. memory is 16.1GB. * Witness Printer took 89.24ms. Allocated memory is still 201.3MB. Free memory was 89.0MB in the beginning and 84.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 64 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.4s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 368 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 339 mSDsluCounter, 169 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 125 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 694 IncrementalHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 44 mSDtfsCounter, 694 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 68 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=244occurred in iteration=6, InterpolantAutomatonStates: 57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 171 NumberOfCodeBlocks, 171 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 163 ConstructedInterpolants, 0 QuantifiedInterpolants, 637 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-21 21:05:13,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_236f0455-2768-43fb-85d5-e96abcdfaee1/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE