./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ --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 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:39:23,354 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:39:23,424 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:39:23,430 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:39:23,431 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:39:23,467 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:39:23,468 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:39:23,468 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:39:23,469 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:39:23,470 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:39:23,471 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:39:23,471 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:39:23,472 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:39:23,473 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:39:23,474 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:39:23,474 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:39:23,475 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:39:23,476 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:39:23,476 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:39:23,477 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:39:23,477 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:39:23,478 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:39:23,479 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:39:23,479 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:39:23,480 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:39:23,481 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:39:23,481 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:39:23,482 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:39:23,482 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:39:23,483 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:39:23,483 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:39:23,484 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:39:23,485 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:39:23,485 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:39:23,486 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:39:23,486 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:39:23,487 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:39:23,487 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:39:23,488 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:39:23,488 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:39:23,489 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:39:23,493 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:39:23,493 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_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a [2023-11-23 22:39:23,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:39:23,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:39:23,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:39:23,885 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:39:23,886 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:39:23,887 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2023-11-23 22:39:26,999 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:39:27,211 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:39:27,212 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2023-11-23 22:39:27,221 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/data/f204eade0/7a0d8f8c601c4024a1d164a0902ea821/FLAG6a0eaae9a [2023-11-23 22:39:27,235 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/data/f204eade0/7a0d8f8c601c4024a1d164a0902ea821 [2023-11-23 22:39:27,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:39:27,242 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:39:27,246 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:39:27,246 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:39:27,251 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:39:27,252 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:39:27" (1/1) ... [2023-11-23 22:39:27,253 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@450ba237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:27, skipping insertion in model container [2023-11-23 22:39:27,254 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:39:27" (1/1) ... [2023-11-23 22:39:27,282 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:39:27,469 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_17c0cee1-7cf6-4228-b9b7-350faa581a87/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2625,2638] [2023-11-23 22:39:27,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:39:27,497 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:39:27,524 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_17c0cee1-7cf6-4228-b9b7-350faa581a87/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2625,2638] [2023-11-23 22:39:27,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:39:27,543 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:39:27,543 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:39:27,550 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:39:27,550 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:27 WrapperNode [2023-11-23 22:39:27,550 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:39:27,552 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:39:27,552 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:39:27,552 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:39:27,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:27" (1/1) ... [2023-11-23 22:39:27,567 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:27" (1/1) ... [2023-11-23 22:39:27,595 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2023-11-23 22:39:27,595 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:39:27,596 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:39:27,596 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:39:27,596 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:39:27,609 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:27" (1/1) ... [2023-11-23 22:39:27,621 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:27" (1/1) ... [2023-11-23 22:39:27,624 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:27" (1/1) ... [2023-11-23 22:39:27,641 INFO L189 HeapSplitter]: Split 15 memory accesses to 5 slices as follows [2, 2, 7, 2, 2] [2023-11-23 22:39:27,641 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:27" (1/1) ... [2023-11-23 22:39:27,641 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:27" (1/1) ... [2023-11-23 22:39:27,653 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:27" (1/1) ... [2023-11-23 22:39:27,657 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:27" (1/1) ... [2023-11-23 22:39:27,660 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:27" (1/1) ... [2023-11-23 22:39:27,662 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:27" (1/1) ... [2023-11-23 22:39:27,668 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:39:27,669 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:39:27,669 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:39:27,669 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:39:27,670 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:27" (1/1) ... [2023-11-23 22:39:27,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:39:27,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:39:27,710 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:39:27,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:39:27,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:39:27,741 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 22:39:27,741 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 22:39:27,741 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 22:39:27,742 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 22:39:27,742 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-23 22:39:27,742 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-23 22:39:27,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:39:27,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:39:27,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:39:27,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 22:39:27,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 22:39:27,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:39:27,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:39:27,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:39:27,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:39:27,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 22:39:27,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 22:39:27,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 22:39:27,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 22:39:27,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 22:39:27,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:39:27,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:39:27,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:39:27,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:39:27,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:39:27,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 22:39:27,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 22:39:27,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:39:27,747 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:39:27,870 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:39:27,872 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:39:28,173 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:39:28,540 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:39:28,541 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-23 22:39:28,541 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:39:28 BoogieIcfgContainer [2023-11-23 22:39:28,542 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:39:28,545 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:39:28,545 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:39:28,548 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:39:28,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:39:27" (1/3) ... [2023-11-23 22:39:28,549 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2910a0af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:39:28, skipping insertion in model container [2023-11-23 22:39:28,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:27" (2/3) ... [2023-11-23 22:39:28,551 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2910a0af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:39:28, skipping insertion in model container [2023-11-23 22:39:28,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:39:28" (3/3) ... [2023-11-23 22:39:28,553 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2023-11-23 22:39:28,561 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 22:39:28,572 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:39:28,572 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:39:28,573 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:39:28,646 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-23 22:39:28,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 35 transitions, 91 flow [2023-11-23 22:39:28,745 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2023-11-23 22:39:28,745 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 22:39:28,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 32 events. 4/32 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2023-11-23 22:39:28,750 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 35 transitions, 91 flow [2023-11-23 22:39:28,754 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 31 transitions, 80 flow [2023-11-23 22:39:28,765 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:39:28,772 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;@9b76f2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:39:28,773 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-23 22:39:28,787 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:39:28,787 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2023-11-23 22:39:28,787 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 22:39:28,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:28,788 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] [2023-11-23 22:39:28,789 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)] === [2023-11-23 22:39:28,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:28,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1064244367, now seen corresponding path program 1 times [2023-11-23 22:39:28,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:28,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731822153] [2023-11-23 22:39:28,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:28,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:29,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:29,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731822153] [2023-11-23 22:39:29,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731822153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:39:29,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:39:29,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:39:29,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829039540] [2023-11-23 22:39:29,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:39:29,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:39:29,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:29,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:39:29,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:39:29,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-23 22:39:29,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2023-11-23 22:39:29,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:29,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-23 22:39:29,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:29,822 INFO L124 PetriNetUnfolderBase]: 674/1036 cut-off events. [2023-11-23 22:39:29,823 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-23 22:39:29,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2120 conditions, 1036 events. 674/1036 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4101 event pairs, 140 based on Foata normal form. 1/1023 useless extension candidates. Maximal degree in co-relation 1708. Up to 740 conditions per place. [2023-11-23 22:39:29,838 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 41 selfloop transitions, 4 changer transitions 1/50 dead transitions. [2023-11-23 22:39:29,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 225 flow [2023-11-23 22:39:29,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:39:29,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:39:29,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-23 22:39:29,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2023-11-23 22:39:29,854 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-23 22:39:29,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-23 22:39:29,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:29,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-23 22:39:29,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2023-11-23 22:39:29,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:29,866 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:29,868 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 80 flow. Second operand 3 states and 68 transitions. [2023-11-23 22:39:29,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 225 flow [2023-11-23 22:39:29,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 50 transitions, 203 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-23 22:39:29,877 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 94 flow [2023-11-23 22:39:29,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2023-11-23 22:39:29,884 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2023-11-23 22:39:29,884 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 94 flow [2023-11-23 22:39:29,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2023-11-23 22:39:29,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:29,885 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] [2023-11-23 22:39:29,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:39:29,886 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)] === [2023-11-23 22:39:29,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:29,887 INFO L85 PathProgramCache]: Analyzing trace with hash 937462874, now seen corresponding path program 1 times [2023-11-23 22:39:29,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:29,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548819209] [2023-11-23 22:39:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:29,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:39:30,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:30,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548819209] [2023-11-23 22:39:30,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548819209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:39:30,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:39:30,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:39:30,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902890392] [2023-11-23 22:39:30,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:39:30,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:39:30,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:30,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:39:30,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:39:30,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-23 22:39:30,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2023-11-23 22:39:30,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:30,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-23 22:39:30,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:30,297 INFO L124 PetriNetUnfolderBase]: 674/1032 cut-off events. [2023-11-23 22:39:30,297 INFO L125 PetriNetUnfolderBase]: For 211/211 co-relation queries the response was YES. [2023-11-23 22:39:30,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2349 conditions, 1032 events. 674/1032 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4207 event pairs, 447 based on Foata normal form. 0/1002 useless extension candidates. Maximal degree in co-relation 875. Up to 984 conditions per place. [2023-11-23 22:39:30,311 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 29 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-11-23 22:39:30,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 158 flow [2023-11-23 22:39:30,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:39:30,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:39:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2023-11-23 22:39:30,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-23 22:39:30,320 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 50 transitions. [2023-11-23 22:39:30,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 50 transitions. [2023-11-23 22:39:30,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:30,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 50 transitions. [2023-11-23 22:39:30,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2023-11-23 22:39:30,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:30,332 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:30,332 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 94 flow. Second operand 3 states and 50 transitions. [2023-11-23 22:39:30,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 158 flow [2023-11-23 22:39:30,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 35 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:39:30,335 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 102 flow [2023-11-23 22:39:30,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2023-11-23 22:39:30,336 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2023-11-23 22:39:30,337 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 102 flow [2023-11-23 22:39:30,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2023-11-23 22:39:30,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:30,337 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] [2023-11-23 22:39:30,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:39:30,338 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)] === [2023-11-23 22:39:30,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:30,339 INFO L85 PathProgramCache]: Analyzing trace with hash 200410163, now seen corresponding path program 1 times [2023-11-23 22:39:30,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:30,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527797425] [2023-11-23 22:39:30,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:30,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:39:30,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:30,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527797425] [2023-11-23 22:39:30,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527797425] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:39:30,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:39:30,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:39:30,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701581709] [2023-11-23 22:39:30,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:39:30,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:39:30,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:30,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:39:30,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:39:30,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-23 22:39:30,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2023-11-23 22:39:30,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:30,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-23 22:39:30,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:30,714 INFO L124 PetriNetUnfolderBase]: 865/1276 cut-off events. [2023-11-23 22:39:30,714 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2023-11-23 22:39:30,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2825 conditions, 1276 events. 865/1276 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5130 event pairs, 265 based on Foata normal form. 0/1226 useless extension candidates. Maximal degree in co-relation 2812. Up to 649 conditions per place. [2023-11-23 22:39:30,726 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 44 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-11-23 22:39:30,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 51 transitions, 240 flow [2023-11-23 22:39:30,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:39:30,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:39:30,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2023-11-23 22:39:30,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2023-11-23 22:39:30,731 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 67 transitions. [2023-11-23 22:39:30,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 67 transitions. [2023-11-23 22:39:30,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:30,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 67 transitions. [2023-11-23 22:39:30,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2023-11-23 22:39:30,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 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) [2023-11-23 22:39:30,736 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 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) [2023-11-23 22:39:30,736 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 102 flow. Second operand 4 states and 67 transitions. [2023-11-23 22:39:30,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 51 transitions, 240 flow [2023-11-23 22:39:30,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 234 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-23 22:39:30,740 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 117 flow [2023-11-23 22:39:30,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-11-23 22:39:30,743 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-11-23 22:39:30,744 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 117 flow [2023-11-23 22:39:30,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2023-11-23 22:39:30,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:30,744 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] [2023-11-23 22:39:30,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:39:30,746 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)] === [2023-11-23 22:39:30,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:30,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1953148681, now seen corresponding path program 1 times [2023-11-23 22:39:30,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:30,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535258498] [2023-11-23 22:39:30,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:30,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:39:30,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:30,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535258498] [2023-11-23 22:39:30,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535258498] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:39:30,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180218043] [2023-11-23 22:39:30,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:30,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:30,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:39:30,948 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:39:30,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:39:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:31,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:39:31,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:39:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:39:31,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:39:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:39:31,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180218043] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:39:31,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:39:31,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-23 22:39:31,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547861881] [2023-11-23 22:39:31,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:39:31,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:39:31,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:31,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:39:31,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:39:31,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-23 22:39:31,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2023-11-23 22:39:31,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:31,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-23 22:39:31,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:31,453 INFO L124 PetriNetUnfolderBase]: 898/1343 cut-off events. [2023-11-23 22:39:31,454 INFO L125 PetriNetUnfolderBase]: For 585/585 co-relation queries the response was YES. [2023-11-23 22:39:31,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3365 conditions, 1343 events. 898/1343 cut-off events. For 585/585 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5622 event pairs, 253 based on Foata normal form. 0/1279 useless extension candidates. Maximal degree in co-relation 3345. Up to 668 conditions per place. [2023-11-23 22:39:31,468 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 43 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2023-11-23 22:39:31,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 52 transitions, 265 flow [2023-11-23 22:39:31,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:39:31,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:39:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2023-11-23 22:39:31,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228571428571429 [2023-11-23 22:39:31,470 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 74 transitions. [2023-11-23 22:39:31,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 74 transitions. [2023-11-23 22:39:31,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:31,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 74 transitions. [2023-11-23 22:39:31,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2023-11-23 22:39:31,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 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) [2023-11-23 22:39:31,473 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 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) [2023-11-23 22:39:31,474 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 117 flow. Second operand 5 states and 74 transitions. [2023-11-23 22:39:31,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 52 transitions, 265 flow [2023-11-23 22:39:31,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 259 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:39:31,478 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 136 flow [2023-11-23 22:39:31,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2023-11-23 22:39:31,480 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2023-11-23 22:39:31,480 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 136 flow [2023-11-23 22:39:31,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2023-11-23 22:39:31,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:31,481 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] [2023-11-23 22:39:31,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:39:31,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:31,703 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)] === [2023-11-23 22:39:31,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:31,704 INFO L85 PathProgramCache]: Analyzing trace with hash -239191844, now seen corresponding path program 1 times [2023-11-23 22:39:31,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:31,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083619598] [2023-11-23 22:39:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:31,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:32,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:32,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083619598] [2023-11-23 22:39:32,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083619598] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:39:32,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109439637] [2023-11-23 22:39:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:32,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:32,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:39:32,842 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:39:32,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:39:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:32,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-23 22:39:32,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:39:33,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 22:39:33,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2023-11-23 22:39:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:33,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:39:36,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 208 [2023-11-23 22:39:36,973 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:39:36,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 261 treesize of output 291 [2023-11-23 22:40:07,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 254 [2023-11-23 22:40:07,179 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2023-11-23 22:40:07,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 372 treesize of output 1 [2023-11-23 22:40:07,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:07,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109439637] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:40:07,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:40:07,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2023-11-23 22:40:07,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105997549] [2023-11-23 22:40:07,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:40:07,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-23 22:40:07,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:07,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 22:40:07,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2023-11-23 22:40:07,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-23 22:40:07,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 136 flow. Second operand has 24 states, 24 states have (on average 8.833333333333334) internal successors, (212), 24 states have internal predecessors, (212), 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) [2023-11-23 22:40:07,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:40:07,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-23 22:40:07,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:40:11,065 INFO L124 PetriNetUnfolderBase]: 1993/3005 cut-off events. [2023-11-23 22:40:11,065 INFO L125 PetriNetUnfolderBase]: For 1852/1852 co-relation queries the response was YES. [2023-11-23 22:40:11,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8274 conditions, 3005 events. 1993/3005 cut-off events. For 1852/1852 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13896 event pairs, 114 based on Foata normal form. 1/3005 useless extension candidates. Maximal degree in co-relation 6106. Up to 1481 conditions per place. [2023-11-23 22:40:11,101 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 151 selfloop transitions, 57 changer transitions 1/213 dead transitions. [2023-11-23 22:40:11,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 213 transitions, 1123 flow [2023-11-23 22:40:11,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-23 22:40:11,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-23 22:40:11,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 335 transitions. [2023-11-23 22:40:11,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2023-11-23 22:40:11,105 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 335 transitions. [2023-11-23 22:40:11,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 335 transitions. [2023-11-23 22:40:11,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:40:11,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 335 transitions. [2023-11-23 22:40:11,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 15.952380952380953) internal successors, (335), 21 states have internal predecessors, (335), 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) [2023-11-23 22:40:11,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 35.0) internal successors, (770), 22 states have internal predecessors, (770), 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) [2023-11-23 22:40:11,111 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 35.0) internal successors, (770), 22 states have internal predecessors, (770), 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) [2023-11-23 22:40:11,111 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 136 flow. Second operand 21 states and 335 transitions. [2023-11-23 22:40:11,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 213 transitions, 1123 flow [2023-11-23 22:40:11,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 213 transitions, 1106 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 22:40:11,120 INFO L231 Difference]: Finished difference. Result has 66 places, 93 transitions, 547 flow [2023-11-23 22:40:11,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=547, PETRI_PLACES=66, PETRI_TRANSITIONS=93} [2023-11-23 22:40:11,121 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 29 predicate places. [2023-11-23 22:40:11,121 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 93 transitions, 547 flow [2023-11-23 22:40:11,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.833333333333334) internal successors, (212), 24 states have internal predecessors, (212), 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) [2023-11-23 22:40:11,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:40:11,122 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] [2023-11-23 22:40:11,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:40:11,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:40:11,343 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)] === [2023-11-23 22:40:11,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:11,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1087062616, now seen corresponding path program 2 times [2023-11-23 22:40:11,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:11,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813994394] [2023-11-23 22:40:11,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:11,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:12,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:12,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813994394] [2023-11-23 22:40:12,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813994394] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:40:12,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246845788] [2023-11-23 22:40:12,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:40:12,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:40:12,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:40:12,194 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:40:12,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c0cee1-7cf6-4228-b9b7-350faa581a87/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:40:12,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:40:12,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:40:12,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-23 22:40:12,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:40:12,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 22:40:12,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 34 [2023-11-23 22:40:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:12,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:40:15,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 254 [2023-11-23 22:40:15,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:40:15,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 372 treesize of output 376