./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 9bd2c7ff 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_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/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_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu --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-9bd2c7f [2023-11-19 07:56:42,437 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:56:42,560 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:56:42,565 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:56:42,566 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:56:42,601 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:56:42,602 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:56:42,602 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:56:42,603 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:56:42,604 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:56:42,605 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:56:42,606 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:56:42,607 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:56:42,607 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:56:42,608 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:56:42,609 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:56:42,609 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:56:42,610 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:56:42,611 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:56:42,617 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:56:42,618 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:56:42,619 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:56:42,619 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:56:42,620 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:56:42,621 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:56:42,621 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:56:42,622 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:56:42,622 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:56:42,623 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:56:42,624 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:56:42,624 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:56:42,625 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:56:42,626 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:56:42,626 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:56:42,627 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:56:42,627 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:56:42,628 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:56:42,628 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:56:42,629 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:56:42,630 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_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a [2023-11-19 07:56:43,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:56:43,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:56:43,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:56:43,080 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:56:43,081 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:56:43,083 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2023-11-19 07:56:46,569 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:56:46,762 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:56:46,763 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2023-11-19 07:56:46,772 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/data/5b58ddbb1/0784b31597dd4449b105eda6cf7b8e97/FLAGe341cf3f2 [2023-11-19 07:56:46,788 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/data/5b58ddbb1/0784b31597dd4449b105eda6cf7b8e97 [2023-11-19 07:56:46,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:56:46,792 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:56:46,794 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:56:46,794 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:56:46,800 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:56:46,801 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:46" (1/1) ... [2023-11-19 07:56:46,802 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52cd9bbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:46, skipping insertion in model container [2023-11-19 07:56:46,802 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:46" (1/1) ... [2023-11-19 07:56:46,879 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:56:47,140 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_decf64ff-8041-46ac-8c88-44e577386d8e/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2625,2638] [2023-11-19 07:56:47,155 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:56:47,171 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:56:47,218 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_decf64ff-8041-46ac-8c88-44e577386d8e/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2625,2638] [2023-11-19 07:56:47,221 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:56:47,233 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:56:47,233 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:56:47,241 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:56:47,242 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:47 WrapperNode [2023-11-19 07:56:47,242 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:56:47,243 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:56:47,243 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:56:47,244 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:56:47,251 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:47" (1/1) ... [2023-11-19 07:56:47,271 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:47" (1/1) ... [2023-11-19 07:56:47,312 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2023-11-19 07:56:47,312 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:56:47,313 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:56:47,313 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:56:47,313 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:56:47,324 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:47" (1/1) ... [2023-11-19 07:56:47,325 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:47" (1/1) ... [2023-11-19 07:56:47,344 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:47" (1/1) ... [2023-11-19 07:56:47,344 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:47" (1/1) ... [2023-11-19 07:56:47,352 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:47" (1/1) ... [2023-11-19 07:56:47,356 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:47" (1/1) ... [2023-11-19 07:56:47,358 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:47" (1/1) ... [2023-11-19 07:56:47,360 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:47" (1/1) ... [2023-11-19 07:56:47,363 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:56:47,364 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:56:47,364 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:56:47,364 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:56:47,365 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:47" (1/1) ... [2023-11-19 07:56:47,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:56:47,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:47,407 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:47,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:56:47,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:56:47,454 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:56:47,454 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:56:47,454 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:56:47,455 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:56:47,455 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:56:47,455 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:56:47,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:56:47,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:56:47,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:56:47,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:56:47,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:56:47,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:56:47,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:56:47,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:56:47,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:56:47,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:56:47,459 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:56:47,573 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:56:47,579 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:56:47,907 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:56:48,013 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:56:48,014 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 07:56:48,018 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:48 BoogieIcfgContainer [2023-11-19 07:56:48,018 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:56:48,026 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:56:48,026 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:56:48,029 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:56:48,030 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:56:46" (1/3) ... [2023-11-19 07:56:48,030 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751e11c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:48, skipping insertion in model container [2023-11-19 07:56:48,031 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:47" (2/3) ... [2023-11-19 07:56:48,031 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751e11c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:48, skipping insertion in model container [2023-11-19 07:56:48,031 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:48" (3/3) ... [2023-11-19 07:56:48,032 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2023-11-19 07:56:48,046 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:56:48,057 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:56:48,057 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:56:48,057 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:56:48,157 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:56:48,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 160 transitions, 341 flow [2023-11-19 07:56:48,302 INFO L124 PetriNetUnfolderBase]: 12/157 cut-off events. [2023-11-19 07:56:48,302 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:56:48,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 157 events. 12/157 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 105 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 117. Up to 2 conditions per place. [2023-11-19 07:56:48,310 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 160 transitions, 341 flow [2023-11-19 07:56:48,317 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 146 transitions, 310 flow [2023-11-19 07:56:48,322 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:56:48,352 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 146 transitions, 310 flow [2023-11-19 07:56:48,356 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 146 transitions, 310 flow [2023-11-19 07:56:48,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 146 transitions, 310 flow [2023-11-19 07:56:48,397 INFO L124 PetriNetUnfolderBase]: 12/146 cut-off events. [2023-11-19 07:56:48,397 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:56:48,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 146 events. 12/146 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 104 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 117. Up to 2 conditions per place. [2023-11-19 07:56:48,401 INFO L119 LiptonReduction]: Number of co-enabled transitions 1728 [2023-11-19 07:56:55,451 INFO L134 LiptonReduction]: Checked pairs total: 1838 [2023-11-19 07:56:55,452 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-11-19 07:56:55,470 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:56:55,478 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;@d9243a9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:56:55,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:56:55,486 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:56:55,487 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-11-19 07:56:55,487 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:56:55,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:55,488 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] [2023-11-19 07:56:55,489 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)] === [2023-11-19 07:56:55,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:55,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1050706724, now seen corresponding path program 1 times [2023-11-19 07:56:55,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:55,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980269890] [2023-11-19 07:56:55,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:55,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:56,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:56,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980269890] [2023-11-19 07:56:56,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980269890] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:56,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:56,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:56:56,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827243763] [2023-11-19 07:56:56,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:56,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:56,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:56,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:56,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:56,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 306 [2023-11-19 07:56:56,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 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) [2023-11-19 07:56:56,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:56,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 306 [2023-11-19 07:56:56,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:56,576 INFO L124 PetriNetUnfolderBase]: 429/632 cut-off events. [2023-11-19 07:56:56,577 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-19 07:56:56,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1341 conditions, 632 events. 429/632 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1988 event pairs, 138 based on Foata normal form. 1/468 useless extension candidates. Maximal degree in co-relation 1030. Up to 389 conditions per place. [2023-11-19 07:56:56,587 INFO L140 encePairwiseOnDemand]: 301/306 looper letters, 38 selfloop transitions, 4 changer transitions 1/43 dead transitions. [2023-11-19 07:56:56,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 43 transitions, 205 flow [2023-11-19 07:56:56,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:56,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:56:56,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 470 transitions. [2023-11-19 07:56:56,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119825708061002 [2023-11-19 07:56:56,624 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 470 transitions. [2023-11-19 07:56:56,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 470 transitions. [2023-11-19 07:56:56,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:56,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 470 transitions. [2023-11-19 07:56:56,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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) [2023-11-19 07:56:56,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 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) [2023-11-19 07:56:56,654 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 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) [2023-11-19 07:56:56,656 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 470 transitions. [2023-11-19 07:56:56,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 43 transitions, 205 flow [2023-11-19 07:56:56,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 43 transitions, 183 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-19 07:56:56,668 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2023-11-19 07:56:56,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-11-19 07:56:56,675 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-19 07:56:56,676 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2023-11-19 07:56:56,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 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) [2023-11-19 07:56:56,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:56,677 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] [2023-11-19 07:56:56,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:56:56,679 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)] === [2023-11-19 07:56:56,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:56,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1544751533, now seen corresponding path program 1 times [2023-11-19 07:56:56,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:56,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958906762] [2023-11-19 07:56:56,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:56,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:56,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:56,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958906762] [2023-11-19 07:56:56,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958906762] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:56,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:56,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:56:56,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76859176] [2023-11-19 07:56:56,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:56,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:56,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:56,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:56,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:56,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 306 [2023-11-19 07:56:56,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 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) [2023-11-19 07:56:56,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:56,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 306 [2023-11-19 07:56:56,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:57,163 INFO L124 PetriNetUnfolderBase]: 429/633 cut-off events. [2023-11-19 07:56:57,163 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2023-11-19 07:56:57,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1541 conditions, 633 events. 429/633 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1876 event pairs, 276 based on Foata normal form. 0/632 useless extension candidates. Maximal degree in co-relation 544. Up to 633 conditions per place. [2023-11-19 07:56:57,172 INFO L140 encePairwiseOnDemand]: 303/306 looper letters, 26 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-11-19 07:56:57,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 138 flow [2023-11-19 07:56:57,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:57,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:56:57,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-11-19 07:56:57,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46949891067538124 [2023-11-19 07:56:57,176 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-11-19 07:56:57,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-11-19 07:56:57,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:57,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-11-19 07:56:57,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 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) [2023-11-19 07:56:57,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 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) [2023-11-19 07:56:57,189 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 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) [2023-11-19 07:56:57,190 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 3 states and 431 transitions. [2023-11-19 07:56:57,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 138 flow [2023-11-19 07:56:57,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 134 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:56:57,193 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 88 flow [2023-11-19 07:56:57,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-11-19 07:56:57,201 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2023-11-19 07:56:57,201 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 88 flow [2023-11-19 07:56:57,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 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) [2023-11-19 07:56:57,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:57,202 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] [2023-11-19 07:56:57,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:56:57,203 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)] === [2023-11-19 07:56:57,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:57,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1840561195, now seen corresponding path program 1 times [2023-11-19 07:56:57,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:57,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808566644] [2023-11-19 07:56:57,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:57,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:56:57,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:57,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808566644] [2023-11-19 07:56:57,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808566644] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:57,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:57,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:56:57,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867272736] [2023-11-19 07:56:57,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:57,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:56:57,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:57,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:56:57,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:56:57,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 306 [2023-11-19 07:56:57,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 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) [2023-11-19 07:56:57,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:57,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 306 [2023-11-19 07:56:57,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:57,662 INFO L124 PetriNetUnfolderBase]: 424/625 cut-off events. [2023-11-19 07:56:57,662 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2023-11-19 07:56:57,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 625 events. 424/625 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1869 event pairs, 186 based on Foata normal form. 50/674 useless extension candidates. Maximal degree in co-relation 1460. Up to 459 conditions per place. [2023-11-19 07:56:57,669 INFO L140 encePairwiseOnDemand]: 302/306 looper letters, 38 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2023-11-19 07:56:57,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 42 transitions, 212 flow [2023-11-19 07:56:57,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:56:57,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:56:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 569 transitions. [2023-11-19 07:56:57,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46486928104575165 [2023-11-19 07:56:57,673 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 569 transitions. [2023-11-19 07:56:57,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 569 transitions. [2023-11-19 07:56:57,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:57,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 569 transitions. [2023-11-19 07:56:57,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 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) [2023-11-19 07:56:57,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 306.0) internal successors, (1530), 5 states have internal predecessors, (1530), 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) [2023-11-19 07:56:57,682 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 306.0) internal successors, (1530), 5 states have internal predecessors, (1530), 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) [2023-11-19 07:56:57,683 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 88 flow. Second operand 4 states and 569 transitions. [2023-11-19 07:56:57,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 42 transitions, 212 flow [2023-11-19 07:56:57,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 42 transitions, 206 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-19 07:56:57,686 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 101 flow [2023-11-19 07:56:57,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-11-19 07:56:57,689 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-11-19 07:56:57,694 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 101 flow [2023-11-19 07:56:57,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 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) [2023-11-19 07:56:57,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:57,695 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] [2023-11-19 07:56:57,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:56:57,696 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)] === [2023-11-19 07:56:57,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:57,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1129902591, now seen corresponding path program 1 times [2023-11-19 07:56:57,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:57,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994065699] [2023-11-19 07:56:57,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:57,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:57,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:57,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994065699] [2023-11-19 07:56:57,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994065699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:57,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936959049] [2023-11-19 07:56:57,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:57,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:57,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:57,875 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:57,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:56:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:58,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:56:58,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:58,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:58,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:58,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936959049] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:58,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:56:58,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-19 07:56:58,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55567756] [2023-11-19 07:56:58,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:58,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:56:58,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:58,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:56:58,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:56:58,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 306 [2023-11-19 07:56:58,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 101 flow. Second operand has 5 states, 5 states have (on average 131.4) internal successors, (657), 5 states have internal predecessors, (657), 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) [2023-11-19 07:56:58,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:58,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 306 [2023-11-19 07:56:58,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:58,452 INFO L124 PetriNetUnfolderBase]: 410/599 cut-off events. [2023-11-19 07:56:58,452 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2023-11-19 07:56:58,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622 conditions, 599 events. 410/599 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1806 event pairs, 183 based on Foata normal form. 44/643 useless extension candidates. Maximal degree in co-relation 1603. Up to 452 conditions per place. [2023-11-19 07:56:58,458 INFO L140 encePairwiseOnDemand]: 301/306 looper letters, 39 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2023-11-19 07:56:58,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 44 transitions, 246 flow [2023-11-19 07:56:58,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:56:58,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:56:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 673 transitions. [2023-11-19 07:56:58,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4398692810457516 [2023-11-19 07:56:58,463 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 673 transitions. [2023-11-19 07:56:58,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 673 transitions. [2023-11-19 07:56:58,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:58,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 673 transitions. [2023-11-19 07:56:58,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 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) [2023-11-19 07:56:58,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 306.0) internal successors, (1836), 6 states have internal predecessors, (1836), 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) [2023-11-19 07:56:58,474 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 306.0) internal successors, (1836), 6 states have internal predecessors, (1836), 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) [2023-11-19 07:56:58,474 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 101 flow. Second operand 5 states and 673 transitions. [2023-11-19 07:56:58,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 44 transitions, 246 flow [2023-11-19 07:56:58,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 44 transitions, 230 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-19 07:56:58,480 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 113 flow [2023-11-19 07:56:58,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-11-19 07:56:58,486 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-11-19 07:56:58,487 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 113 flow [2023-11-19 07:56:58,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.4) internal successors, (657), 5 states have internal predecessors, (657), 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) [2023-11-19 07:56:58,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:58,488 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] [2023-11-19 07:56:58,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:58,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:58,708 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)] === [2023-11-19 07:56:58,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:58,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1940075138, now seen corresponding path program 1 times [2023-11-19 07:56:58,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:58,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887646659] [2023-11-19 07:56:58,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:58,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:00,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:00,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887646659] [2023-11-19 07:57:00,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887646659] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:00,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606597812] [2023-11-19 07:57:00,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:00,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:00,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:00,378 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:00,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:57:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:00,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-19 07:57:00,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:00,655 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 [2023-11-19 07:57:00,743 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 8 treesize of output 1 [2023-11-19 07:57:00,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:57:00,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2023-11-19 07:57:01,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:57:01,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2023-11-19 07:57:01,517 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 [2023-11-19 07:57:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:01,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:02,355 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (= c_~min2~0 c_~min1~0)) (.cse2 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (or .cse0 (forall ((v_ArrVal_113 (Array Int Int))) (let ((.cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse2))) (or (< c_~min3~0 (+ .cse1 1)) (= c_~min1~0 .cse1))))) (forall ((v_ArrVal_113 (Array Int Int))) (let ((.cse4 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse2))) (let ((.cse3 (+ .cse4 1))) (or (< c_~min3~0 .cse3) (= c_~min1~0 .cse4) (< c_~min2~0 .cse3))))) (or (and .cse0 (<= c_~min2~0 c_~min3~0)) (forall ((v_ArrVal_113 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse2) c_~min3~0)) (and (= c_~min1~0 c_~min3~0) (<= (+ c_~min3~0 1) c_~min2~0))) (or .cse0 (forall ((v_ArrVal_113 (Array Int Int))) (let ((.cse5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse2))) (or (< c_~min3~0 (+ .cse5 1)) (< .cse5 c_~min2~0))))))) is different from false [2023-11-19 07:57:02,974 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~A~0.offset (* 4 c_~M~0)))) (let ((.cse6 (forall ((v_ArrVal_113 (Array Int Int)) (v_ArrVal_112 (Array Int Int))) (let ((.cse14 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_112) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse3))) (or (< c_~min3~0 (+ .cse14 1)) (< .cse14 c_~min2~0))))) (.cse8 (forall ((v_ArrVal_113 (Array Int Int)) (v_ArrVal_112 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_112) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse3) c_~min3~0))) (.cse9 (<= c_~min2~0 c_~min3~0)) (.cse7 (<= (+ c_~min3~0 1) c_~min2~0)) (.cse2 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork2_~i~0 4))))) (and (or (let ((.cse0 (= c_~min2~0 .cse2))) (and (or .cse0 (forall ((v_ArrVal_113 (Array Int Int)) (v_ArrVal_112 (Array Int Int))) (let ((.cse1 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_112) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse3))) (or (< c_~min3~0 (+ .cse1 1)) (= .cse2 .cse1))))) (forall ((v_ArrVal_113 (Array Int Int)) (v_ArrVal_112 (Array Int Int))) (let ((.cse5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_112) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse3))) (let ((.cse4 (+ .cse5 1))) (or (< c_~min2~0 .cse4) (< c_~min3~0 .cse4) (= .cse2 .cse5))))) (or .cse0 .cse6) (or (and .cse7 (= .cse2 c_~min3~0)) .cse8 (and .cse0 .cse9)))) (< c_~min1~0 (+ .cse2 1))) (or (let ((.cse12 (= c_~min2~0 c_~min1~0))) (and (forall ((v_ArrVal_113 (Array Int Int)) (v_ArrVal_112 (Array Int Int))) (let ((.cse10 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_112) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse3))) (let ((.cse11 (+ .cse10 1))) (or (= c_~min1~0 .cse10) (< c_~min2~0 .cse11) (< c_~min3~0 .cse11))))) (or .cse12 .cse6) (or .cse8 (and .cse12 .cse9) (and (= c_~min1~0 c_~min3~0) .cse7)) (or .cse12 (forall ((v_ArrVal_113 (Array Int Int)) (v_ArrVal_112 (Array Int Int))) (let ((.cse13 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_112) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse3))) (or (= c_~min1~0 .cse13) (< c_~min3~0 (+ .cse13 1)))))))) (< .cse2 c_~min1~0))))) is different from false [2023-11-19 07:57:03,207 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~A~0.offset (* 4 c_~M~0)))) (let ((.cse7 (<= c_~min2~0 c_~min3~0)) (.cse6 (forall ((v_ArrVal_113 (Array Int Int)) (v_ArrVal_112 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_112) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse3) c_~min3~0))) (.cse8 (<= (+ c_~min3~0 1) c_~min2~0)) (.cse5 (forall ((v_ArrVal_113 (Array Int Int)) (v_ArrVal_112 (Array Int Int))) (let ((.cse14 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_112) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse3))) (or (< c_~min3~0 (+ .cse14 1)) (< .cse14 c_~min2~0))))) (.cse0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset))) (and (or (< .cse0 c_~min1~0) (let ((.cse4 (= c_~min2~0 c_~min1~0))) (and (forall ((v_ArrVal_113 (Array Int Int)) (v_ArrVal_112 (Array Int Int))) (let ((.cse1 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_112) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse3))) (let ((.cse2 (+ .cse1 1))) (or (= c_~min1~0 .cse1) (< c_~min2~0 .cse2) (< c_~min3~0 .cse2))))) (or .cse4 .cse5) (or .cse6 (and .cse4 .cse7) (and (= c_~min1~0 c_~min3~0) .cse8)) (or .cse4 (forall ((v_ArrVal_113 (Array Int Int)) (v_ArrVal_112 (Array Int Int))) (let ((.cse9 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_112) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse3))) (or (= c_~min1~0 .cse9) (< c_~min3~0 (+ .cse9 1))))))))) (or (let ((.cse11 (= c_~min2~0 .cse0))) (and (or (forall ((v_ArrVal_113 (Array Int Int)) (v_ArrVal_112 (Array Int Int))) (let ((.cse10 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_112) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse3))) (or (= .cse0 .cse10) (< c_~min3~0 (+ .cse10 1))))) .cse11) (forall ((v_ArrVal_113 (Array Int Int)) (v_ArrVal_112 (Array Int Int))) (let ((.cse12 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_112) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse3))) (let ((.cse13 (+ .cse12 1))) (or (= .cse0 .cse12) (< c_~min2~0 .cse13) (< c_~min3~0 .cse13))))) (or (and .cse7 .cse11) .cse6 (and .cse8 (= .cse0 c_~min3~0))) (or .cse5 .cse11))) (< c_~min1~0 (+ .cse0 1)))))) is different from false [2023-11-19 07:57:05,049 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:57:05,049 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 65 [2023-11-19 07:57:05,066 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:57:05,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 199 [2023-11-19 07:57:05,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 152 treesize of output 128 [2023-11-19 07:57:05,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 116 [2023-11-19 07:57:05,132 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:57:05,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 84 [2023-11-19 07:57:05,944 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:57:05,944 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 55 [2023-11-19 07:57:05,957 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:57:05,958 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:57:05,970 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:57:05,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 64 [2023-11-19 07:57:06,009 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:57:06,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 28 [2023-11-19 07:57:06,071 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:57:06,072 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 43 [2023-11-19 07:57:06,080 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:57:06,081 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:57:06,095 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:57:06,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2023-11-19 07:57:06,115 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:57:06,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2023-11-19 07:57:06,150 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-19 07:57:06,150 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 1 [2023-11-19 07:57:06,174 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-19 07:57:06,178 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 1 [2023-11-19 07:57:06,194 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-19 07:57:06,195 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 1 [2023-11-19 07:57:06,211 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-19 07:57:06,212 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 1 [2023-11-19 07:57:06,232 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-19 07:57:06,233 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 1 [2023-11-19 07:57:06,256 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-19 07:57:06,257 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 1 [2023-11-19 07:57:06,276 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-19 07:57:06,276 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 1 [2023-11-19 07:57:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-19 07:57:06,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606597812] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:06,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:06,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-11-19 07:57:06,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180385427] [2023-11-19 07:57:06,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:06,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-19 07:57:06,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:06,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-19 07:57:06,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=496, Unknown=9, NotChecked=144, Total=756 [2023-11-19 07:57:06,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 306 [2023-11-19 07:57:06,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 113 flow. Second operand has 28 states, 28 states have (on average 84.46428571428571) internal successors, (2365), 28 states have internal predecessors, (2365), 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) [2023-11-19 07:57:06,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:57:06,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 306 [2023-11-19 07:57:06,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:57:10,454 INFO L124 PetriNetUnfolderBase]: 747/1095 cut-off events. [2023-11-19 07:57:10,454 INFO L125 PetriNetUnfolderBase]: For 563/563 co-relation queries the response was YES. [2023-11-19 07:57:10,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3135 conditions, 1095 events. 747/1095 cut-off events. For 563/563 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3997 event pairs, 58 based on Foata normal form. 1/1094 useless extension candidates. Maximal degree in co-relation 2725. Up to 647 conditions per place. [2023-11-19 07:57:10,464 INFO L140 encePairwiseOnDemand]: 297/306 looper letters, 80 selfloop transitions, 23 changer transitions 1/104 dead transitions. [2023-11-19 07:57:10,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 104 transitions, 550 flow [2023-11-19 07:57:10,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:57:10,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:57:10,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 923 transitions. [2023-11-19 07:57:10,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30163398692810456 [2023-11-19 07:57:10,470 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 923 transitions. [2023-11-19 07:57:10,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 923 transitions. [2023-11-19 07:57:10,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:57:10,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 923 transitions. [2023-11-19 07:57:10,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 92.3) internal successors, (923), 10 states have internal predecessors, (923), 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) [2023-11-19 07:57:10,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 306.0) internal successors, (3366), 11 states have internal predecessors, (3366), 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) [2023-11-19 07:57:10,483 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 306.0) internal successors, (3366), 11 states have internal predecessors, (3366), 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) [2023-11-19 07:57:10,483 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 113 flow. Second operand 10 states and 923 transitions. [2023-11-19 07:57:10,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 104 transitions, 550 flow [2023-11-19 07:57:10,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 104 transitions, 534 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-19 07:57:10,488 INFO L231 Difference]: Finished difference. Result has 45 places, 48 transitions, 262 flow [2023-11-19 07:57:10,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=262, PETRI_PLACES=45, PETRI_TRANSITIONS=48} [2023-11-19 07:57:10,489 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2023-11-19 07:57:10,490 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 48 transitions, 262 flow [2023-11-19 07:57:10,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 84.46428571428571) internal successors, (2365), 28 states have internal predecessors, (2365), 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) [2023-11-19 07:57:10,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:57:10,492 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] [2023-11-19 07:57:10,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-19 07:57:10,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:10,713 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)] === [2023-11-19 07:57:10,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:10,713 INFO L85 PathProgramCache]: Analyzing trace with hash -793137588, now seen corresponding path program 2 times [2023-11-19 07:57:10,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:10,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222019126] [2023-11-19 07:57:10,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:10,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:57:11,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:11,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222019126] [2023-11-19 07:57:11,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222019126] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:11,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622512856] [2023-11-19 07:57:11,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:57:11,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:11,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:11,484 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:11,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:57:11,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:57:11,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:57:11,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 07:57:11,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:12,073 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 [2023-11-19 07:57:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:12,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:12,500 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:57:12,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 75 [2023-11-19 07:57:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:13,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622512856] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:13,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:13,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-11-19 07:57:13,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869459733] [2023-11-19 07:57:13,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:13,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:57:13,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:13,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:57:13,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:57:14,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 306 [2023-11-19 07:57:14,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 48 transitions, 262 flow. Second operand has 20 states, 20 states have (on average 111.0) internal successors, (2220), 20 states have internal predecessors, (2220), 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) [2023-11-19 07:57:14,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:57:14,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 306 [2023-11-19 07:57:14,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:57:15,237 INFO L124 PetriNetUnfolderBase]: 899/1328 cut-off events. [2023-11-19 07:57:15,237 INFO L125 PetriNetUnfolderBase]: For 1563/1563 co-relation queries the response was YES. [2023-11-19 07:57:15,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4434 conditions, 1328 events. 899/1328 cut-off events. For 1563/1563 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4918 event pairs, 130 based on Foata normal form. 15/1342 useless extension candidates. Maximal degree in co-relation 3626. Up to 980 conditions per place. [2023-11-19 07:57:15,253 INFO L140 encePairwiseOnDemand]: 295/306 looper letters, 84 selfloop transitions, 50 changer transitions 1/135 dead transitions. [2023-11-19 07:57:15,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 135 transitions, 884 flow [2023-11-19 07:57:15,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:57:15,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-19 07:57:15,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2067 transitions. [2023-11-19 07:57:15,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3752723311546841 [2023-11-19 07:57:15,266 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2067 transitions. [2023-11-19 07:57:15,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2067 transitions. [2023-11-19 07:57:15,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:57:15,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2067 transitions. [2023-11-19 07:57:15,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 114.83333333333333) internal successors, (2067), 18 states have internal predecessors, (2067), 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) [2023-11-19 07:57:15,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 306.0) internal successors, (5814), 19 states have internal predecessors, (5814), 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) [2023-11-19 07:57:15,293 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 306.0) internal successors, (5814), 19 states have internal predecessors, (5814), 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) [2023-11-19 07:57:15,293 INFO L175 Difference]: Start difference. First operand has 45 places, 48 transitions, 262 flow. Second operand 18 states and 2067 transitions. [2023-11-19 07:57:15,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 135 transitions, 884 flow [2023-11-19 07:57:15,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 135 transitions, 828 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-11-19 07:57:15,305 INFO L231 Difference]: Finished difference. Result has 68 places, 89 transitions, 606 flow [2023-11-19 07:57:15,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=606, PETRI_PLACES=68, PETRI_TRANSITIONS=89} [2023-11-19 07:57:15,309 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 38 predicate places. [2023-11-19 07:57:15,309 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 89 transitions, 606 flow [2023-11-19 07:57:15,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 111.0) internal successors, (2220), 20 states have internal predecessors, (2220), 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) [2023-11-19 07:57:15,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:57:15,311 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] [2023-11-19 07:57:15,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:15,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:57:15,537 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)] === [2023-11-19 07:57:15,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:15,538 INFO L85 PathProgramCache]: Analyzing trace with hash 847238290, now seen corresponding path program 3 times [2023-11-19 07:57:15,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:15,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340160484] [2023-11-19 07:57:15,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:15,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:57:16,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:16,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340160484] [2023-11-19 07:57:16,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340160484] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:16,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463101771] [2023-11-19 07:57:16,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:57:16,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:16,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:16,313 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:16,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:57:16,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:57:16,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:57:16,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 07:57:16,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:16,825 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 [2023-11-19 07:57:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:16,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:17,183 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:57:17,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 75 [2023-11-19 07:57:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:17,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463101771] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:17,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:17,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-11-19 07:57:17,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309501828] [2023-11-19 07:57:17,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:17,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:57:17,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:17,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:57:17,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:57:18,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 306 [2023-11-19 07:57:18,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 89 transitions, 606 flow. Second operand has 20 states, 20 states have (on average 110.8) internal successors, (2216), 20 states have internal predecessors, (2216), 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) [2023-11-19 07:57:18,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:57:18,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 306 [2023-11-19 07:57:18,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:57:19,696 INFO L124 PetriNetUnfolderBase]: 1171/1723 cut-off events. [2023-11-19 07:57:19,697 INFO L125 PetriNetUnfolderBase]: For 3811/3811 co-relation queries the response was YES. [2023-11-19 07:57:19,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6851 conditions, 1723 events. 1171/1723 cut-off events. For 3811/3811 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6806 event pairs, 179 based on Foata normal form. 1/1724 useless extension candidates. Maximal degree in co-relation 5845. Up to 1271 conditions per place. [2023-11-19 07:57:19,715 INFO L140 encePairwiseOnDemand]: 294/306 looper letters, 123 selfloop transitions, 75 changer transitions 1/199 dead transitions. [2023-11-19 07:57:19,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 199 transitions, 1563 flow [2023-11-19 07:57:19,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:57:19,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 07:57:19,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2197 transitions. [2023-11-19 07:57:19,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37788097695218437 [2023-11-19 07:57:19,725 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2197 transitions. [2023-11-19 07:57:19,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2197 transitions. [2023-11-19 07:57:19,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:57:19,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2197 transitions. [2023-11-19 07:57:19,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 115.63157894736842) internal successors, (2197), 19 states have internal predecessors, (2197), 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) [2023-11-19 07:57:19,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 306.0) internal successors, (6120), 20 states have internal predecessors, (6120), 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) [2023-11-19 07:57:19,747 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 306.0) internal successors, (6120), 20 states have internal predecessors, (6120), 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) [2023-11-19 07:57:19,747 INFO L175 Difference]: Start difference. First operand has 68 places, 89 transitions, 606 flow. Second operand 19 states and 2197 transitions. [2023-11-19 07:57:19,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 199 transitions, 1563 flow [2023-11-19 07:57:19,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 199 transitions, 1494 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-11-19 07:57:19,769 INFO L231 Difference]: Finished difference. Result has 93 places, 131 transitions, 1116 flow [2023-11-19 07:57:19,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1116, PETRI_PLACES=93, PETRI_TRANSITIONS=131} [2023-11-19 07:57:19,770 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 63 predicate places. [2023-11-19 07:57:19,770 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 131 transitions, 1116 flow [2023-11-19 07:57:19,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 110.8) internal successors, (2216), 20 states have internal predecessors, (2216), 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) [2023-11-19 07:57:19,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:57:19,772 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] [2023-11-19 07:57:19,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:19,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:57:19,978 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)] === [2023-11-19 07:57:19,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:19,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1100756512, now seen corresponding path program 4 times [2023-11-19 07:57:19,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:19,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237226725] [2023-11-19 07:57:19,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:19,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:20,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:20,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:20,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237226725] [2023-11-19 07:57:20,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237226725] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:20,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062555015] [2023-11-19 07:57:20,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:57:20,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:20,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:20,629 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:20,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:57:20,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:57:20,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:57:20,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 07:57:20,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:21,062 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 [2023-11-19 07:57:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:57:21,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:21,379 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:57:21,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 75 [2023-11-19 07:57:21,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:57:21,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062555015] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:21,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:21,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 21 [2023-11-19 07:57:21,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490456235] [2023-11-19 07:57:21,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:21,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 07:57:21,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:21,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 07:57:21,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:57:22,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 306 [2023-11-19 07:57:22,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 131 transitions, 1116 flow. Second operand has 23 states, 23 states have (on average 113.69565217391305) internal successors, (2615), 23 states have internal predecessors, (2615), 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) [2023-11-19 07:57:22,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:57:22,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 306 [2023-11-19 07:57:22,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:57:23,889 INFO L124 PetriNetUnfolderBase]: 1280/1889 cut-off events. [2023-11-19 07:57:23,889 INFO L125 PetriNetUnfolderBase]: For 5369/5369 co-relation queries the response was YES. [2023-11-19 07:57:23,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8322 conditions, 1889 events. 1280/1889 cut-off events. For 5369/5369 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7695 event pairs, 198 based on Foata normal form. 1/1878 useless extension candidates. Maximal degree in co-relation 7827. Up to 1498 conditions per place. [2023-11-19 07:57:23,912 INFO L140 encePairwiseOnDemand]: 295/306 looper letters, 123 selfloop transitions, 84 changer transitions 1/208 dead transitions. [2023-11-19 07:57:23,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 208 transitions, 1899 flow [2023-11-19 07:57:23,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:57:23,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 07:57:23,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2245 transitions. [2023-11-19 07:57:23,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38613691090471275 [2023-11-19 07:57:23,921 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2245 transitions. [2023-11-19 07:57:23,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2245 transitions. [2023-11-19 07:57:23,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:57:23,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2245 transitions. [2023-11-19 07:57:23,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 118.15789473684211) internal successors, (2245), 19 states have internal predecessors, (2245), 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) [2023-11-19 07:57:23,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 306.0) internal successors, (6120), 20 states have internal predecessors, (6120), 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) [2023-11-19 07:57:23,942 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 306.0) internal successors, (6120), 20 states have internal predecessors, (6120), 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) [2023-11-19 07:57:23,943 INFO L175 Difference]: Start difference. First operand has 93 places, 131 transitions, 1116 flow. Second operand 19 states and 2245 transitions. [2023-11-19 07:57:23,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 208 transitions, 1899 flow [2023-11-19 07:57:23,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 208 transitions, 1735 flow, removed 43 selfloop flow, removed 6 redundant places. [2023-11-19 07:57:23,970 INFO L231 Difference]: Finished difference. Result has 110 places, 147 transitions, 1339 flow [2023-11-19 07:57:23,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1339, PETRI_PLACES=110, PETRI_TRANSITIONS=147} [2023-11-19 07:57:23,971 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 80 predicate places. [2023-11-19 07:57:23,972 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 147 transitions, 1339 flow [2023-11-19 07:57:23,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 113.69565217391305) internal successors, (2615), 23 states have internal predecessors, (2615), 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) [2023-11-19 07:57:23,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:57:23,973 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] [2023-11-19 07:57:23,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:24,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:24,193 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:57:24,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:24,193 INFO L85 PathProgramCache]: Analyzing trace with hash 954444684, now seen corresponding path program 5 times [2023-11-19 07:57:24,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:24,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851634679] [2023-11-19 07:57:24,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:24,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:57:24,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:24,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851634679] [2023-11-19 07:57:24,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851634679] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:24,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354048107] [2023-11-19 07:57:24,826 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:57:24,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:24,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:24,830 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:24,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_decf64ff-8041-46ac-8c88-44e577386d8e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:57:24,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-19 07:57:24,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:57:24,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-19 07:57:24,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:25,020 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 [2023-11-19 07:57:25,092 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 8 treesize of output 1 [2023-11-19 07:57:25,163 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 8 treesize of output 1 [2023-11-19 07:57:25,266 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 8 treesize of output 1 [2023-11-19 07:57:25,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:57:25,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 75 [2023-11-19 07:57:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:25,952 INFO L327 TraceCheckSpWp]: Computing backward predicates...