./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl --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 bb07434636f33664cc09ed992a41516efeea5f96121c916fb8904844e76d9fcd --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:17:02,416 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:17:02,500 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:17:02,505 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:17:02,506 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:17:02,555 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:17:02,555 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:17:02,556 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:17:02,557 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:17:02,557 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:17:02,558 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:17:02,558 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:17:02,559 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:17:02,560 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:17:02,563 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:17:02,564 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:17:02,566 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:17:02,569 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:17:02,570 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:17:02,570 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:17:02,572 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:17:02,572 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:17:02,573 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:17:02,573 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:17:02,574 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:17:02,574 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:17:02,575 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:17:02,575 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:17:02,576 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:17:02,576 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:17:02,577 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:17:02,577 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:17:02,578 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:17:02,578 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:17:02,578 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:17:02,578 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:17:02,578 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:17:02,579 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:17:02,579 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:17:02,579 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_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb07434636f33664cc09ed992a41516efeea5f96121c916fb8904844e76d9fcd [2023-11-12 02:17:02,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:17:02,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:17:02,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:17:02,945 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:17:02,945 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:17:02,946 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/unroll-4.wvr.c [2023-11-12 02:17:06,025 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:17:06,259 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:17:06,260 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/sv-benchmarks/c/weaver/unroll-4.wvr.c [2023-11-12 02:17:06,268 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/data/9be351f9d/c8dc18a6cb0b4016a78f4fac7d6fbeeb/FLAG41d93c588 [2023-11-12 02:17:06,283 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/data/9be351f9d/c8dc18a6cb0b4016a78f4fac7d6fbeeb [2023-11-12 02:17:06,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:17:06,288 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:17:06,289 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:17:06,290 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:17:06,295 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:17:06,296 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:17:06" (1/1) ... [2023-11-12 02:17:06,297 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46da11b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:06, skipping insertion in model container [2023-11-12 02:17:06,298 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:17:06" (1/1) ... [2023-11-12 02:17:06,323 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:17:06,578 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_2144fb9d-48e9-4e01-97ac-d83bed671539/sv-benchmarks/c/weaver/unroll-4.wvr.c[2598,2611] [2023-11-12 02:17:06,598 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:17:06,611 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:17:06,663 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_2144fb9d-48e9-4e01-97ac-d83bed671539/sv-benchmarks/c/weaver/unroll-4.wvr.c[2598,2611] [2023-11-12 02:17:06,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:17:06,689 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:17:06,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:06 WrapperNode [2023-11-12 02:17:06,689 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:17:06,691 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:17:06,691 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:17:06,691 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:17:06,699 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:06" (1/1) ... [2023-11-12 02:17:06,727 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:06" (1/1) ... [2023-11-12 02:17:06,780 INFO L138 Inliner]: procedures = 24, calls = 36, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 159 [2023-11-12 02:17:06,781 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:17:06,781 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:17:06,782 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:17:06,782 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:17:06,791 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:06" (1/1) ... [2023-11-12 02:17:06,792 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:06" (1/1) ... [2023-11-12 02:17:06,837 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:06" (1/1) ... [2023-11-12 02:17:06,837 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:06" (1/1) ... [2023-11-12 02:17:06,849 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:06" (1/1) ... [2023-11-12 02:17:06,855 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:06" (1/1) ... [2023-11-12 02:17:06,857 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:06" (1/1) ... [2023-11-12 02:17:06,859 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:06" (1/1) ... [2023-11-12 02:17:06,862 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:17:06,864 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:17:06,864 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:17:06,864 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:17:06,865 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:06" (1/1) ... [2023-11-12 02:17:06,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:17:06,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:06,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:17:06,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:17:06,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:17:06,939 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:17:06,939 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:17:06,939 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:17:06,940 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:17:06,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:17:06,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:17:06,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:17:06,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:17:06,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:17:06,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:17:06,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:17:06,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:17:06,943 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:17:07,057 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:17:07,059 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:17:07,427 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:17:07,438 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:17:07,438 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 02:17:07,441 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:17:07 BoogieIcfgContainer [2023-11-12 02:17:07,441 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:17:07,444 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:17:07,445 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:17:07,448 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:17:07,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:17:06" (1/3) ... [2023-11-12 02:17:07,449 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cfbd33b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:17:07, skipping insertion in model container [2023-11-12 02:17:07,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:06" (2/3) ... [2023-11-12 02:17:07,450 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cfbd33b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:17:07, skipping insertion in model container [2023-11-12 02:17:07,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:17:07" (3/3) ... [2023-11-12 02:17:07,451 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2023-11-12 02:17:07,461 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:17:07,472 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:17:07,473 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:17:07,473 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:17:07,578 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:17:07,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 201 transitions, 416 flow [2023-11-12 02:17:07,736 INFO L124 PetriNetUnfolderBase]: 16/199 cut-off events. [2023-11-12 02:17:07,736 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:17:07,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 199 events. 16/199 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 176 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2023-11-12 02:17:07,747 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 201 transitions, 416 flow [2023-11-12 02:17:07,764 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 190 transitions, 392 flow [2023-11-12 02:17:07,767 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:17:07,781 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 190 transitions, 392 flow [2023-11-12 02:17:07,784 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 190 transitions, 392 flow [2023-11-12 02:17:07,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 190 transitions, 392 flow [2023-11-12 02:17:07,852 INFO L124 PetriNetUnfolderBase]: 16/190 cut-off events. [2023-11-12 02:17:07,854 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:17:07,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 190 events. 16/190 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 156 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2023-11-12 02:17:07,860 INFO L119 LiptonReduction]: Number of co-enabled transitions 3780 [2023-11-12 02:17:14,647 INFO L134 LiptonReduction]: Checked pairs total: 3730 [2023-11-12 02:17:14,647 INFO L136 LiptonReduction]: Total number of compositions: 231 [2023-11-12 02:17:14,679 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:17:14,687 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;@6fc04b55, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:17:14,687 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 02:17:14,696 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:17:14,696 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-12 02:17:14,696 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:17:14,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:14,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:14,698 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:14,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:14,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1387528094, now seen corresponding path program 1 times [2023-11-12 02:17:14,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:14,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386822905] [2023-11-12 02:17:14,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:14,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:15,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:15,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386822905] [2023-11-12 02:17:15,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386822905] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:15,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:15,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:17:15,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334931764] [2023-11-12 02:17:15,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:15,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:17:15,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:15,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:17:15,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:17:15,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 432 [2023-11-12 02:17:15,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 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) [2023-11-12 02:17:15,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:15,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 432 [2023-11-12 02:17:15,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:15,444 INFO L124 PetriNetUnfolderBase]: 75/136 cut-off events. [2023-11-12 02:17:15,444 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-12 02:17:15,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 136 events. 75/136 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 356 event pairs, 24 based on Foata normal form. 1/104 useless extension candidates. Maximal degree in co-relation 220. Up to 79 conditions per place. [2023-11-12 02:17:15,453 INFO L140 encePairwiseOnDemand]: 428/432 looper letters, 25 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2023-11-12 02:17:15,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 29 transitions, 137 flow [2023-11-12 02:17:15,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:17:15,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:17:15,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 558 transitions. [2023-11-12 02:17:15,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2023-11-12 02:17:15,474 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 558 transitions. [2023-11-12 02:17:15,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 558 transitions. [2023-11-12 02:17:15,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:15,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 558 transitions. [2023-11-12 02:17:15,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 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) [2023-11-12 02:17:15,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 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) [2023-11-12 02:17:15,495 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 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) [2023-11-12 02:17:15,498 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 558 transitions. [2023-11-12 02:17:15,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 29 transitions, 137 flow [2023-11-12 02:17:15,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 29 transitions, 123 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:17:15,504 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2023-11-12 02:17:15,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-11-12 02:17:15,510 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-12 02:17:15,510 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2023-11-12 02:17:15,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 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) [2023-11-12 02:17:15,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:15,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:15,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:17:15,512 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:15,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:15,512 INFO L85 PathProgramCache]: Analyzing trace with hash 178995938, now seen corresponding path program 1 times [2023-11-12 02:17:15,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:15,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100463257] [2023-11-12 02:17:15,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:15,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:15,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:15,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:15,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:15,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100463257] [2023-11-12 02:17:15,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100463257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:15,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:15,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:17:15,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7503283] [2023-11-12 02:17:15,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:15,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:17:15,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:15,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:17:15,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:17:15,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 432 [2023-11-12 02:17:15,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 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) [2023-11-12 02:17:15,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:15,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 432 [2023-11-12 02:17:15,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:15,879 INFO L124 PetriNetUnfolderBase]: 75/137 cut-off events. [2023-11-12 02:17:15,879 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-12 02:17:15,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 137 events. 75/137 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 334 event pairs, 48 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 120. Up to 137 conditions per place. [2023-11-12 02:17:15,881 INFO L140 encePairwiseOnDemand]: 429/432 looper letters, 18 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-11-12 02:17:15,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 99 flow [2023-11-12 02:17:15,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:17:15,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:17:15,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 544 transitions. [2023-11-12 02:17:15,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2023-11-12 02:17:15,885 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 544 transitions. [2023-11-12 02:17:15,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 544 transitions. [2023-11-12 02:17:15,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:15,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 544 transitions. [2023-11-12 02:17:15,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 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) [2023-11-12 02:17:15,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 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) [2023-11-12 02:17:15,895 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 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) [2023-11-12 02:17:15,895 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 3 states and 544 transitions. [2023-11-12 02:17:15,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 99 flow [2023-11-12 02:17:15,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 20 transitions, 96 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:17:15,897 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 66 flow [2023-11-12 02:17:15,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2023-11-12 02:17:15,898 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-11-12 02:17:15,899 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 66 flow [2023-11-12 02:17:15,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 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) [2023-11-12 02:17:15,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:15,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:15,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:17:15,901 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:15,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:15,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2125792267, now seen corresponding path program 1 times [2023-11-12 02:17:15,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:15,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107531617] [2023-11-12 02:17:15,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:15,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:16,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:16,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107531617] [2023-11-12 02:17:16,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107531617] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:16,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338902272] [2023-11-12 02:17:16,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:16,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:16,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:16,128 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:16,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:17:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:16,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:17:16,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:16,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:16,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338902272] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:16,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:17:16,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-11-12 02:17:16,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229415382] [2023-11-12 02:17:16,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:16,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:17:16,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:16,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:17:16,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:17:16,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 432 [2023-11-12 02:17:16,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 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) [2023-11-12 02:17:16,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:16,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 432 [2023-11-12 02:17:16,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:16,630 INFO L124 PetriNetUnfolderBase]: 83/151 cut-off events. [2023-11-12 02:17:16,631 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-12 02:17:16,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 151 events. 83/151 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 407 event pairs, 24 based on Foata normal form. 6/156 useless extension candidates. Maximal degree in co-relation 347. Up to 78 conditions per place. [2023-11-12 02:17:16,632 INFO L140 encePairwiseOnDemand]: 428/432 looper letters, 31 selfloop transitions, 4 changer transitions 1/36 dead transitions. [2023-11-12 02:17:16,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 36 transitions, 178 flow [2023-11-12 02:17:16,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:17:16,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:17:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 728 transitions. [2023-11-12 02:17:16,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212962962962963 [2023-11-12 02:17:16,637 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 728 transitions. [2023-11-12 02:17:16,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 728 transitions. [2023-11-12 02:17:16,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:16,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 728 transitions. [2023-11-12 02:17:16,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 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) [2023-11-12 02:17:16,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 432.0) internal successors, (2160), 5 states have internal predecessors, (2160), 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) [2023-11-12 02:17:16,647 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 432.0) internal successors, (2160), 5 states have internal predecessors, (2160), 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) [2023-11-12 02:17:16,647 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 66 flow. Second operand 4 states and 728 transitions. [2023-11-12 02:17:16,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 36 transitions, 178 flow [2023-11-12 02:17:16,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 36 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:17:16,651 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 88 flow [2023-11-12 02:17:16,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-11-12 02:17:16,652 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-12 02:17:16,652 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 88 flow [2023-11-12 02:17:16,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 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) [2023-11-12 02:17:16,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:16,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:16,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:16,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:16,859 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:16,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:16,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1585114726, now seen corresponding path program 1 times [2023-11-12 02:17:16,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:16,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929566007] [2023-11-12 02:17:16,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:16,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:17,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:17,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929566007] [2023-11-12 02:17:17,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929566007] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:17,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:17,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:17:17,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076420447] [2023-11-12 02:17:17,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:17,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:17:17,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:17,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:17:17,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:17:17,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 432 [2023-11-12 02:17:17,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 174.2) internal successors, (871), 5 states have internal predecessors, (871), 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) [2023-11-12 02:17:17,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:17,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 432 [2023-11-12 02:17:17,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:17,340 INFO L124 PetriNetUnfolderBase]: 93/184 cut-off events. [2023-11-12 02:17:17,340 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2023-11-12 02:17:17,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 184 events. 93/184 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 626 event pairs, 26 based on Foata normal form. 12/195 useless extension candidates. Maximal degree in co-relation 490. Up to 101 conditions per place. [2023-11-12 02:17:17,342 INFO L140 encePairwiseOnDemand]: 427/432 looper letters, 33 selfloop transitions, 4 changer transitions 8/45 dead transitions. [2023-11-12 02:17:17,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 45 transitions, 253 flow [2023-11-12 02:17:17,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:17:17,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:17:17,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 896 transitions. [2023-11-12 02:17:17,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2023-11-12 02:17:17,347 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 896 transitions. [2023-11-12 02:17:17,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 896 transitions. [2023-11-12 02:17:17,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:17,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 896 transitions. [2023-11-12 02:17:17,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 179.2) internal successors, (896), 5 states have internal predecessors, (896), 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) [2023-11-12 02:17:17,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 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) [2023-11-12 02:17:17,359 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 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) [2023-11-12 02:17:17,359 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 88 flow. Second operand 5 states and 896 transitions. [2023-11-12 02:17:17,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 45 transitions, 253 flow [2023-11-12 02:17:17,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 45 transitions, 248 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:17:17,364 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 115 flow [2023-11-12 02:17:17,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-11-12 02:17:17,367 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2023-11-12 02:17:17,367 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 115 flow [2023-11-12 02:17:17,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 174.2) internal successors, (871), 5 states have internal predecessors, (871), 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) [2023-11-12 02:17:17,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:17,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:17,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:17:17,373 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:17,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:17,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1552427397, now seen corresponding path program 2 times [2023-11-12 02:17:17,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:17,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193665881] [2023-11-12 02:17:17,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:17,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:17,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:17,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193665881] [2023-11-12 02:17:17,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193665881] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:17,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523228168] [2023-11-12 02:17:17,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:17:17,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:17,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:17,605 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:17,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:17:17,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:17:17,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:17:17,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:17:17,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:17,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:17,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523228168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:17:17,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:17:17,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-12 02:17:17,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400720356] [2023-11-12 02:17:17,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:17:17,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:17:17,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:17,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:17:17,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:17:18,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 432 [2023-11-12 02:17:18,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 115 flow. Second operand has 8 states, 8 states have (on average 172.75) internal successors, (1382), 8 states have internal predecessors, (1382), 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) [2023-11-12 02:17:18,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:18,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 432 [2023-11-12 02:17:18,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:18,237 INFO L124 PetriNetUnfolderBase]: 117/232 cut-off events. [2023-11-12 02:17:18,237 INFO L125 PetriNetUnfolderBase]: For 288/288 co-relation queries the response was YES. [2023-11-12 02:17:18,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 232 events. 117/232 cut-off events. For 288/288 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 803 event pairs, 42 based on Foata normal form. 6/237 useless extension candidates. Maximal degree in co-relation 761. Up to 135 conditions per place. [2023-11-12 02:17:18,240 INFO L140 encePairwiseOnDemand]: 427/432 looper letters, 34 selfloop transitions, 11 changer transitions 6/51 dead transitions. [2023-11-12 02:17:18,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 51 transitions, 338 flow [2023-11-12 02:17:18,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:17:18,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:17:18,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 893 transitions. [2023-11-12 02:17:18,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134259259259259 [2023-11-12 02:17:18,246 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 893 transitions. [2023-11-12 02:17:18,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 893 transitions. [2023-11-12 02:17:18,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:18,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 893 transitions. [2023-11-12 02:17:18,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 178.6) internal successors, (893), 5 states have internal predecessors, (893), 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) [2023-11-12 02:17:18,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 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) [2023-11-12 02:17:18,259 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 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) [2023-11-12 02:17:18,259 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 115 flow. Second operand 5 states and 893 transitions. [2023-11-12 02:17:18,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 51 transitions, 338 flow [2023-11-12 02:17:18,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 51 transitions, 320 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-12 02:17:18,267 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 194 flow [2023-11-12 02:17:18,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-11-12 02:17:18,270 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-11-12 02:17:18,272 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 194 flow [2023-11-12 02:17:18,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 172.75) internal successors, (1382), 8 states have internal predecessors, (1382), 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) [2023-11-12 02:17:18,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:18,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:18,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:18,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:18,482 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:18,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:18,482 INFO L85 PathProgramCache]: Analyzing trace with hash 2082801284, now seen corresponding path program 2 times [2023-11-12 02:17:18,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:18,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739737643] [2023-11-12 02:17:18,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:18,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:18,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:18,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739737643] [2023-11-12 02:17:18,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739737643] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:18,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745881406] [2023-11-12 02:17:18,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:17:18,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:18,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:18,795 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:18,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:17:18,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:17:18,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:17:18,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:17:18,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:18,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:18,954 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:17:18,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745881406] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:18,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:17:18,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2023-11-12 02:17:18,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32113285] [2023-11-12 02:17:18,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:18,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:17:18,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:18,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:17:18,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:17:19,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 432 [2023-11-12 02:17:19,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 194 flow. Second operand has 5 states, 5 states have (on average 174.2) internal successors, (871), 5 states have internal predecessors, (871), 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) [2023-11-12 02:17:19,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:19,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 432 [2023-11-12 02:17:19,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:19,143 INFO L124 PetriNetUnfolderBase]: 123/242 cut-off events. [2023-11-12 02:17:19,143 INFO L125 PetriNetUnfolderBase]: For 480/480 co-relation queries the response was YES. [2023-11-12 02:17:19,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 242 events. 123/242 cut-off events. For 480/480 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 901 event pairs, 38 based on Foata normal form. 4/245 useless extension candidates. Maximal degree in co-relation 903. Up to 147 conditions per place. [2023-11-12 02:17:19,146 INFO L140 encePairwiseOnDemand]: 427/432 looper letters, 37 selfloop transitions, 11 changer transitions 4/52 dead transitions. [2023-11-12 02:17:19,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 52 transitions, 397 flow [2023-11-12 02:17:19,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:17:19,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:17:19,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 897 transitions. [2023-11-12 02:17:19,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152777777777778 [2023-11-12 02:17:19,151 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 897 transitions. [2023-11-12 02:17:19,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 897 transitions. [2023-11-12 02:17:19,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:19,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 897 transitions. [2023-11-12 02:17:19,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 179.4) internal successors, (897), 5 states have internal predecessors, (897), 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) [2023-11-12 02:17:19,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 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) [2023-11-12 02:17:19,160 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 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) [2023-11-12 02:17:19,161 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 194 flow. Second operand 5 states and 897 transitions. [2023-11-12 02:17:19,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 52 transitions, 397 flow [2023-11-12 02:17:19,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 52 transitions, 395 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-12 02:17:19,165 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 271 flow [2023-11-12 02:17:19,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-11-12 02:17:19,166 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2023-11-12 02:17:19,166 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 271 flow [2023-11-12 02:17:19,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 174.2) internal successors, (871), 5 states have internal predecessors, (871), 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) [2023-11-12 02:17:19,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:19,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:19,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:19,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:19,374 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:19,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:19,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1313229734, now seen corresponding path program 3 times [2023-11-12 02:17:19,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:19,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367823909] [2023-11-12 02:17:19,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:19,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:19,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:19,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367823909] [2023-11-12 02:17:19,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367823909] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:19,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663168233] [2023-11-12 02:17:19,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:17:19,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:19,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:19,617 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:19,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:17:19,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:17:19,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:17:19,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:17:19,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:19,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:19,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663168233] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:19,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:17:19,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2023-11-12 02:17:19,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949551159] [2023-11-12 02:17:19,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:19,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:17:19,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:19,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:17:19,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:17:19,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 432 [2023-11-12 02:17:19,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 271 flow. Second operand has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 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) [2023-11-12 02:17:19,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:19,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 432 [2023-11-12 02:17:19,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:20,001 INFO L124 PetriNetUnfolderBase]: 123/236 cut-off events. [2023-11-12 02:17:20,001 INFO L125 PetriNetUnfolderBase]: For 607/607 co-relation queries the response was YES. [2023-11-12 02:17:20,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1015 conditions, 236 events. 123/236 cut-off events. For 607/607 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 822 event pairs, 38 based on Foata normal form. 4/239 useless extension candidates. Maximal degree in co-relation 988. Up to 146 conditions per place. [2023-11-12 02:17:20,004 INFO L140 encePairwiseOnDemand]: 428/432 looper letters, 34 selfloop transitions, 9 changer transitions 4/47 dead transitions. [2023-11-12 02:17:20,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 47 transitions, 422 flow [2023-11-12 02:17:20,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:17:20,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:17:20,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 738 transitions. [2023-11-12 02:17:20,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2023-11-12 02:17:20,008 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 738 transitions. [2023-11-12 02:17:20,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 738 transitions. [2023-11-12 02:17:20,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:20,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 738 transitions. [2023-11-12 02:17:20,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.5) internal successors, (738), 4 states have internal predecessors, (738), 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) [2023-11-12 02:17:20,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 432.0) internal successors, (2160), 5 states have internal predecessors, (2160), 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) [2023-11-12 02:17:20,016 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 432.0) internal successors, (2160), 5 states have internal predecessors, (2160), 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) [2023-11-12 02:17:20,016 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 271 flow. Second operand 4 states and 738 transitions. [2023-11-12 02:17:20,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 47 transitions, 422 flow [2023-11-12 02:17:20,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 47 transitions, 407 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-12 02:17:20,021 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 300 flow [2023-11-12 02:17:20,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=300, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2023-11-12 02:17:20,022 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-11-12 02:17:20,023 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 300 flow [2023-11-12 02:17:20,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 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) [2023-11-12 02:17:20,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:20,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:20,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:20,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:20,236 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:20,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:20,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1788464051, now seen corresponding path program 3 times [2023-11-12 02:17:20,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:20,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981339541] [2023-11-12 02:17:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:20,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:20,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:20,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981339541] [2023-11-12 02:17:20,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981339541] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:20,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:20,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:17:20,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375487279] [2023-11-12 02:17:20,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:20,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:17:20,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:20,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:17:20,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:17:20,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 432 [2023-11-12 02:17:20,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 300 flow. Second operand has 5 states, 5 states have (on average 173.2) internal successors, (866), 5 states have internal predecessors, (866), 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) [2023-11-12 02:17:20,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:20,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 432 [2023-11-12 02:17:20,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:20,560 INFO L124 PetriNetUnfolderBase]: 106/195 cut-off events. [2023-11-12 02:17:20,560 INFO L125 PetriNetUnfolderBase]: For 654/654 co-relation queries the response was YES. [2023-11-12 02:17:20,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 195 events. 106/195 cut-off events. For 654/654 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 572 event pairs, 34 based on Foata normal form. 2/196 useless extension candidates. Maximal degree in co-relation 853. Up to 149 conditions per place. [2023-11-12 02:17:20,563 INFO L140 encePairwiseOnDemand]: 427/432 looper letters, 31 selfloop transitions, 11 changer transitions 2/44 dead transitions. [2023-11-12 02:17:20,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 421 flow [2023-11-12 02:17:20,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:17:20,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:17:20,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 880 transitions. [2023-11-12 02:17:20,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2023-11-12 02:17:20,568 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 880 transitions. [2023-11-12 02:17:20,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 880 transitions. [2023-11-12 02:17:20,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:20,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 880 transitions. [2023-11-12 02:17:20,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 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) [2023-11-12 02:17:20,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 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) [2023-11-12 02:17:20,577 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 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) [2023-11-12 02:17:20,577 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 300 flow. Second operand 5 states and 880 transitions. [2023-11-12 02:17:20,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 421 flow [2023-11-12 02:17:20,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 389 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-12 02:17:20,582 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 295 flow [2023-11-12 02:17:20,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=295, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2023-11-12 02:17:20,585 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-11-12 02:17:20,585 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 295 flow [2023-11-12 02:17:20,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 173.2) internal successors, (866), 5 states have internal predecessors, (866), 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) [2023-11-12 02:17:20,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:20,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:20,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:17:20,586 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:20,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:20,587 INFO L85 PathProgramCache]: Analyzing trace with hash -2120693905, now seen corresponding path program 4 times [2023-11-12 02:17:20,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:20,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189457689] [2023-11-12 02:17:20,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:20,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:20,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:20,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189457689] [2023-11-12 02:17:20,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189457689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:20,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:20,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:17:20,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917757241] [2023-11-12 02:17:20,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:20,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:17:20,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:20,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:17:20,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:17:20,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 432 [2023-11-12 02:17:20,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 295 flow. Second operand has 5 states, 5 states have (on average 174.2) internal successors, (871), 5 states have internal predecessors, (871), 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) [2023-11-12 02:17:20,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:20,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 432 [2023-11-12 02:17:20,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:20,897 INFO L124 PetriNetUnfolderBase]: 100/181 cut-off events. [2023-11-12 02:17:20,897 INFO L125 PetriNetUnfolderBase]: For 692/692 co-relation queries the response was YES. [2023-11-12 02:17:20,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 181 events. 100/181 cut-off events. For 692/692 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 512 event pairs, 31 based on Foata normal form. 4/184 useless extension candidates. Maximal degree in co-relation 829. Up to 130 conditions per place. [2023-11-12 02:17:20,899 INFO L140 encePairwiseOnDemand]: 427/432 looper letters, 32 selfloop transitions, 9 changer transitions 4/45 dead transitions. [2023-11-12 02:17:20,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 45 transitions, 426 flow [2023-11-12 02:17:20,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:17:20,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:17:20,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 885 transitions. [2023-11-12 02:17:20,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097222222222222 [2023-11-12 02:17:20,905 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 885 transitions. [2023-11-12 02:17:20,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 885 transitions. [2023-11-12 02:17:20,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:20,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 885 transitions. [2023-11-12 02:17:20,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 177.0) internal successors, (885), 5 states have internal predecessors, (885), 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) [2023-11-12 02:17:20,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 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) [2023-11-12 02:17:20,914 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 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) [2023-11-12 02:17:20,914 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 295 flow. Second operand 5 states and 885 transitions. [2023-11-12 02:17:20,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 45 transitions, 426 flow [2023-11-12 02:17:20,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 398 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-12 02:17:20,920 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 304 flow [2023-11-12 02:17:20,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2023-11-12 02:17:20,921 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2023-11-12 02:17:20,922 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 304 flow [2023-11-12 02:17:20,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 174.2) internal successors, (871), 5 states have internal predecessors, (871), 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) [2023-11-12 02:17:20,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:20,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:20,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:17:20,923 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:20,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:20,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1711639307, now seen corresponding path program 1 times [2023-11-12 02:17:20,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:20,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060666695] [2023-11-12 02:17:20,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:20,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:17:21,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:21,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060666695] [2023-11-12 02:17:21,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060666695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:21,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897104852] [2023-11-12 02:17:21,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:21,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:21,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:21,102 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:21,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:17:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:21,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 02:17:21,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:21,419 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:21,420 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 72 [2023-11-12 02:17:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:21,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:21,810 INFO L322 Elim1Store]: treesize reduction 5, result has 95.2 percent of original size [2023-11-12 02:17:21,811 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 100 treesize of output 135 [2023-11-12 02:17:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:22,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897104852] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:17:22,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:17:22,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2023-11-12 02:17:22,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517987503] [2023-11-12 02:17:22,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:17:22,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:17:22,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:22,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:17:22,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:17:23,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 432 [2023-11-12 02:17:23,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 304 flow. Second operand has 13 states, 13 states have (on average 156.53846153846155) internal successors, (2035), 13 states have internal predecessors, (2035), 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) [2023-11-12 02:17:23,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:23,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 432 [2023-11-12 02:17:23,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:23,997 INFO L124 PetriNetUnfolderBase]: 271/477 cut-off events. [2023-11-12 02:17:23,998 INFO L125 PetriNetUnfolderBase]: For 1883/1883 co-relation queries the response was YES. [2023-11-12 02:17:24,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2343 conditions, 477 events. 271/477 cut-off events. For 1883/1883 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1867 event pairs, 25 based on Foata normal form. 25/500 useless extension candidates. Maximal degree in co-relation 2288. Up to 211 conditions per place. [2023-11-12 02:17:24,003 INFO L140 encePairwiseOnDemand]: 423/432 looper letters, 41 selfloop transitions, 22 changer transitions 74/137 dead transitions. [2023-11-12 02:17:24,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 137 transitions, 1279 flow [2023-11-12 02:17:24,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 02:17:24,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-12 02:17:24,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3023 transitions. [2023-11-12 02:17:24,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36829922027290446 [2023-11-12 02:17:24,016 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3023 transitions. [2023-11-12 02:17:24,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3023 transitions. [2023-11-12 02:17:24,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:24,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3023 transitions. [2023-11-12 02:17:24,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 159.10526315789474) internal successors, (3023), 19 states have internal predecessors, (3023), 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) [2023-11-12 02:17:24,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 432.0) internal successors, (8640), 20 states have internal predecessors, (8640), 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) [2023-11-12 02:17:24,047 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 432.0) internal successors, (8640), 20 states have internal predecessors, (8640), 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) [2023-11-12 02:17:24,048 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 304 flow. Second operand 19 states and 3023 transitions. [2023-11-12 02:17:24,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 137 transitions, 1279 flow [2023-11-12 02:17:24,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 137 transitions, 1179 flow, removed 18 selfloop flow, removed 5 redundant places. [2023-11-12 02:17:24,060 INFO L231 Difference]: Finished difference. Result has 68 places, 43 transitions, 427 flow [2023-11-12 02:17:24,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=427, PETRI_PLACES=68, PETRI_TRANSITIONS=43} [2023-11-12 02:17:24,061 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2023-11-12 02:17:24,062 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 43 transitions, 427 flow [2023-11-12 02:17:24,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 156.53846153846155) internal successors, (2035), 13 states have internal predecessors, (2035), 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) [2023-11-12 02:17:24,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:24,063 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:24,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:24,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:24,270 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:17:24,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:24,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1153911654, now seen corresponding path program 2 times [2023-11-12 02:17:24,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:24,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327934263] [2023-11-12 02:17:24,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:24,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:24,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:24,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327934263] [2023-11-12 02:17:24,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327934263] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:24,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669255174] [2023-11-12 02:17:24,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:17:24,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:24,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:24,513 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:24,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2144fb9d-48e9-4e01-97ac-d83bed671539/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:17:24,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:17:24,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:17:24,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-12 02:17:24,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:24,679 INFO L351 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 23 treesize of output 1 [2023-11-12 02:17:24,713 INFO L351 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 [2023-11-12 02:17:24,741 INFO L351 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 [2023-11-12 02:17:24,839 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:24,840 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 80 [2023-11-12 02:17:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:24,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:26,399 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:26,400 INFO L351 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 298 treesize of output 178 [2023-11-12 02:17:26,494 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:26,495 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 868 treesize of output 820 [2023-11-12 02:17:26,655 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:26,656 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 167 treesize of output 232 [2023-11-12 02:17:26,838 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:26,838 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 263 treesize of output 229 [2023-11-12 02:17:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:32,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669255174] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:17:32,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:17:32,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2023-11-12 02:17:32,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679565875] [2023-11-12 02:17:32,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:17:32,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 02:17:32,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:32,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 02:17:32,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=185, Unknown=4, NotChecked=0, Total=240 [2023-11-12 02:17:35,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:17:37,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-12 02:17:39,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-12 02:17:41,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-12 02:17:43,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-12 02:17:45,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:17:47,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-12 02:17:49,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:17:51,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-12 02:17:53,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-12 02:17:55,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-12 02:17:57,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-12 02:18:00,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]