./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-prod-cons3.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_64912dff-b991-4455-8d44-d7c1119ea16d/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64912dff-b991-4455-8d44-d7c1119ea16d/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_64912dff-b991-4455-8d44-d7c1119ea16d/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64912dff-b991-4455-8d44-d7c1119ea16d/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64912dff-b991-4455-8d44-d7c1119ea16d/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_64912dff-b991-4455-8d44-d7c1119ea16d/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 41874b69ed787f1d4b0fd199a95bb437bfc8aab0f734c194621d2ef33cc65cc9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:15:30,017 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:15:30,135 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64912dff-b991-4455-8d44-d7c1119ea16d/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:15:30,145 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:15:30,146 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:15:30,186 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:15:30,187 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:15:30,188 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:15:30,189 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:15:30,194 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:15:30,196 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:15:30,197 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:15:30,197 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:15:30,199 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:15:30,200 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:15:30,201 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:15:30,201 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:15:30,202 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:15:30,202 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:15:30,203 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:15:30,203 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:15:30,204 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:15:30,204 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:15:30,205 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:15:30,205 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:15:30,206 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:15:30,207 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:15:30,208 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:15:30,208 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:15:30,209 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:15:30,210 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:15:30,211 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:15:30,211 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:15:30,211 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:15:30,212 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:15:30,212 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:15:30,213 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:15:30,213 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:15:30,213 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:15:30,214 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_64912dff-b991-4455-8d44-d7c1119ea16d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64912dff-b991-4455-8d44-d7c1119ea16d/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 41874b69ed787f1d4b0fd199a95bb437bfc8aab0f734c194621d2ef33cc65cc9 [2023-11-12 02:15:30,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:15:30,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:15:30,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:15:30,566 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:15:30,566 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:15:30,568 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64912dff-b991-4455-8d44-d7c1119ea16d/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c [2023-11-12 02:15:33,757 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:15:34,011 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:15:34,012 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64912dff-b991-4455-8d44-d7c1119ea16d/sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c [2023-11-12 02:15:34,024 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64912dff-b991-4455-8d44-d7c1119ea16d/bin/uautomizer-verify-uTZkv6EMXl/data/d26c9d0be/cd3d7e2b0baf4eee9ba41292a5ca201a/FLAG8cee4599e [2023-11-12 02:15:34,045 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64912dff-b991-4455-8d44-d7c1119ea16d/bin/uautomizer-verify-uTZkv6EMXl/data/d26c9d0be/cd3d7e2b0baf4eee9ba41292a5ca201a [2023-11-12 02:15:34,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:15:34,056 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:15:34,059 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:15:34,060 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:15:34,066 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:15:34,067 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:15:34" (1/1) ... [2023-11-12 02:15:34,068 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@645e203a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:34, skipping insertion in model container [2023-11-12 02:15:34,068 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:15:34" (1/1) ... [2023-11-12 02:15:34,113 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:15:34,352 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_64912dff-b991-4455-8d44-d7c1119ea16d/sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c[4059,4072] [2023-11-12 02:15:34,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:15:34,372 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:15:34,403 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_64912dff-b991-4455-8d44-d7c1119ea16d/sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c[4059,4072] [2023-11-12 02:15:34,418 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:15:34,426 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:15:34,427 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:15:34,446 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:15:34,447 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:34 WrapperNode [2023-11-12 02:15:34,447 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:15:34,453 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:15:34,454 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:15:34,454 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:15:34,461 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:34" (1/1) ... [2023-11-12 02:15:34,471 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:34" (1/1) ... [2023-11-12 02:15:34,505 INFO L138 Inliner]: procedures = 26, calls = 73, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 279 [2023-11-12 02:15:34,505 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:15:34,506 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:15:34,506 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:15:34,506 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:15:34,523 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:34" (1/1) ... [2023-11-12 02:15:34,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:34" (1/1) ... [2023-11-12 02:15:34,528 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:34" (1/1) ... [2023-11-12 02:15:34,529 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:34" (1/1) ... [2023-11-12 02:15:34,540 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:34" (1/1) ... [2023-11-12 02:15:34,545 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:34" (1/1) ... [2023-11-12 02:15:34,547 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:34" (1/1) ... [2023-11-12 02:15:34,549 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:34" (1/1) ... [2023-11-12 02:15:34,554 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:15:34,555 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:15:34,555 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:15:34,555 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:15:34,556 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:34" (1/1) ... [2023-11-12 02:15:34,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:15:34,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64912dff-b991-4455-8d44-d7c1119ea16d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:34,601 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64912dff-b991-4455-8d44-d7c1119ea16d/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:15:34,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64912dff-b991-4455-8d44-d7c1119ea16d/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:15:34,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:15:34,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:15:34,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:15:34,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:15:34,656 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:15:34,656 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:15:34,656 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:15:34,657 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:15:34,657 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-12 02:15:34,657 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-12 02:15:34,657 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-12 02:15:34,657 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-12 02:15:34,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:15:34,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:15:34,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:15:34,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:15:34,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:15:34,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:15:34,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:15:34,660 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 02:15:34,793 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:15:34,795 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:15:35,333 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:15:35,505 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:15:35,506 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-12 02:15:35,508 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:15:35 BoogieIcfgContainer [2023-11-12 02:15:35,508 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:15:35,511 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:15:35,511 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:15:35,514 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:15:35,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:15:34" (1/3) ... [2023-11-12 02:15:35,515 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a4aa463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:15:35, skipping insertion in model container [2023-11-12 02:15:35,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:34" (2/3) ... [2023-11-12 02:15:35,515 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a4aa463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:15:35, skipping insertion in model container [2023-11-12 02:15:35,516 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:15:35" (3/3) ... [2023-11-12 02:15:35,517 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons3.wvr.c [2023-11-12 02:15:35,526 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:15:35,536 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:15:35,536 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:15:35,536 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:15:35,634 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-12 02:15:35,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 249 transitions, 526 flow [2023-11-12 02:15:35,794 INFO L124 PetriNetUnfolderBase]: 18/245 cut-off events. [2023-11-12 02:15:35,794 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:15:35,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 245 events. 18/245 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 145 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 210. Up to 3 conditions per place. [2023-11-12 02:15:35,800 INFO L82 GeneralOperation]: Start removeDead. Operand has 244 places, 249 transitions, 526 flow [2023-11-12 02:15:35,808 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 227 places, 232 transitions, 488 flow [2023-11-12 02:15:35,811 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:15:35,829 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 227 places, 232 transitions, 488 flow [2023-11-12 02:15:35,834 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 227 places, 232 transitions, 488 flow [2023-11-12 02:15:35,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 232 transitions, 488 flow [2023-11-12 02:15:35,891 INFO L124 PetriNetUnfolderBase]: 18/232 cut-off events. [2023-11-12 02:15:35,892 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:15:35,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 232 events. 18/232 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 146 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 210. Up to 3 conditions per place. [2023-11-12 02:15:35,897 INFO L119 LiptonReduction]: Number of co-enabled transitions 2746 [2023-11-12 02:15:46,990 INFO L134 LiptonReduction]: Checked pairs total: 4566 [2023-11-12 02:15:46,991 INFO L136 LiptonReduction]: Total number of compositions: 239 [2023-11-12 02:15:47,007 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:15:47,014 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;@16a993eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:15:47,015 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-12 02:15:47,026 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:15:47,026 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2023-11-12 02:15:47,027 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:15:47,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:15:47,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:15:47,028 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:15:47,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:47,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1396490786, now seen corresponding path program 1 times [2023-11-12 02:15:47,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:47,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044893893] [2023-11-12 02:15:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:47,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:47,748 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 02:15:47,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:47,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044893893] [2023-11-12 02:15:47,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044893893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:47,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:47,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:15:47,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184897107] [2023-11-12 02:15:47,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:47,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:15:47,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:47,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:15:47,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:15:47,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 488 [2023-11-12 02:15:47,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 224.5) internal successors, (898), 4 states have internal predecessors, (898), 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 02:15:47,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:15:47,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 488 [2023-11-12 02:15:47,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:15:48,385 INFO L124 PetriNetUnfolderBase]: 1599/2386 cut-off events. [2023-11-12 02:15:48,385 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2023-11-12 02:15:48,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4844 conditions, 2386 events. 1599/2386 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10595 event pairs, 181 based on Foata normal form. 0/2078 useless extension candidates. Maximal degree in co-relation 4088. Up to 765 conditions per place. [2023-11-12 02:15:48,409 INFO L140 encePairwiseOnDemand]: 483/488 looper letters, 76 selfloop transitions, 5 changer transitions 0/83 dead transitions. [2023-11-12 02:15:48,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 83 transitions, 373 flow [2023-11-12 02:15:48,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:15:48,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:15:48,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1173 transitions. [2023-11-12 02:15:48,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807377049180328 [2023-11-12 02:15:48,432 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1173 transitions. [2023-11-12 02:15:48,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1173 transitions. [2023-11-12 02:15:48,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:15:48,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1173 transitions. [2023-11-12 02:15:48,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 234.6) internal successors, (1173), 5 states have internal predecessors, (1173), 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 02:15:48,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 488.0) internal successors, (2928), 6 states have internal predecessors, (2928), 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 02:15:48,459 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 488.0) internal successors, (2928), 6 states have internal predecessors, (2928), 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 02:15:48,461 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 96 flow. Second operand 5 states and 1173 transitions. [2023-11-12 02:15:48,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 83 transitions, 373 flow [2023-11-12 02:15:48,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 83 transitions, 340 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-11-12 02:15:48,471 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 108 flow [2023-11-12 02:15:48,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-11-12 02:15:48,476 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -2 predicate places. [2023-11-12 02:15:48,477 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 108 flow [2023-11-12 02:15:48,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.5) internal successors, (898), 4 states have internal predecessors, (898), 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 02:15:48,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:15:48,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:15:48,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:15:48,479 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:15:48,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:48,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1941538840, now seen corresponding path program 2 times [2023-11-12 02:15:48,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:48,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636357495] [2023-11-12 02:15:48,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:48,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:48,641 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 02:15:48,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:48,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636357495] [2023-11-12 02:15:48,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636357495] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:48,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:48,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:15:48,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492433107] [2023-11-12 02:15:48,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:48,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:15:48,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:48,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:15:48,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:15:48,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 488 [2023-11-12 02:15:48,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 224.5) internal successors, (898), 4 states have internal predecessors, (898), 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 02:15:48,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:15:48,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 488 [2023-11-12 02:15:48,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:15:49,138 INFO L124 PetriNetUnfolderBase]: 1801/2618 cut-off events. [2023-11-12 02:15:49,139 INFO L125 PetriNetUnfolderBase]: For 722/722 co-relation queries the response was YES. [2023-11-12 02:15:49,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5800 conditions, 2618 events. 1801/2618 cut-off events. For 722/722 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 11423 event pairs, 199 based on Foata normal form. 0/2402 useless extension candidates. Maximal degree in co-relation 3646. Up to 1035 conditions per place. [2023-11-12 02:15:49,164 INFO L140 encePairwiseOnDemand]: 483/488 looper letters, 69 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2023-11-12 02:15:49,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 79 transitions, 360 flow [2023-11-12 02:15:49,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:15:49,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:15:49,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1166 transitions. [2023-11-12 02:15:49,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4778688524590164 [2023-11-12 02:15:49,170 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1166 transitions. [2023-11-12 02:15:49,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1166 transitions. [2023-11-12 02:15:49,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:15:49,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1166 transitions. [2023-11-12 02:15:49,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 233.2) internal successors, (1166), 5 states have internal predecessors, (1166), 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 02:15:49,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 488.0) internal successors, (2928), 6 states have internal predecessors, (2928), 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 02:15:49,184 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 488.0) internal successors, (2928), 6 states have internal predecessors, (2928), 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 02:15:49,184 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 108 flow. Second operand 5 states and 1166 transitions. [2023-11-12 02:15:49,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 79 transitions, 360 flow [2023-11-12 02:15:49,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 79 transitions, 356 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:15:49,193 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 149 flow [2023-11-12 02:15:49,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-11-12 02:15:49,194 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2023-11-12 02:15:49,194 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 149 flow [2023-11-12 02:15:49,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.5) internal successors, (898), 4 states have internal predecessors, (898), 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 02:15:49,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:15:49,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:15:49,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:15:49,196 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:15:49,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:49,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1356592870, now seen corresponding path program 3 times [2023-11-12 02:15:49,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:49,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539260041] [2023-11-12 02:15:49,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:49,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:49,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:49,525 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 02:15:49,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:49,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539260041] [2023-11-12 02:15:49,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539260041] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:49,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:49,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:15:49,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734015034] [2023-11-12 02:15:49,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:49,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:15:49,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:49,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:15:49,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:15:49,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 488 [2023-11-12 02:15:49,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 149 flow. Second operand has 6 states, 6 states have (on average 218.33333333333334) internal successors, (1310), 6 states have internal predecessors, (1310), 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 02:15:49,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:15:49,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 488 [2023-11-12 02:15:49,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:15:50,616 INFO L124 PetriNetUnfolderBase]: 4151/5952 cut-off events. [2023-11-12 02:15:50,616 INFO L125 PetriNetUnfolderBase]: For 3464/3476 co-relation queries the response was YES. [2023-11-12 02:15:50,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14492 conditions, 5952 events. 4151/5952 cut-off events. For 3464/3476 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 29222 event pairs, 401 based on Foata normal form. 100/5724 useless extension candidates. Maximal degree in co-relation 8249. Up to 1928 conditions per place. [2023-11-12 02:15:50,661 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 93 selfloop transitions, 9 changer transitions 14/118 dead transitions. [2023-11-12 02:15:50,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 118 transitions, 597 flow [2023-11-12 02:15:50,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:15:50,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-12 02:15:50,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1822 transitions. [2023-11-12 02:15:50,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4667008196721312 [2023-11-12 02:15:50,670 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1822 transitions. [2023-11-12 02:15:50,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1822 transitions. [2023-11-12 02:15:50,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:15:50,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1822 transitions. [2023-11-12 02:15:50,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 227.75) internal successors, (1822), 8 states have internal predecessors, (1822), 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 02:15:50,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 488.0) internal successors, (4392), 9 states have internal predecessors, (4392), 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 02:15:50,691 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 488.0) internal successors, (4392), 9 states have internal predecessors, (4392), 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 02:15:50,691 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 149 flow. Second operand 8 states and 1822 transitions. [2023-11-12 02:15:50,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 118 transitions, 597 flow [2023-11-12 02:15:50,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 118 transitions, 590 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:15:50,709 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 180 flow [2023-11-12 02:15:50,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=180, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2023-11-12 02:15:50,710 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2023-11-12 02:15:50,714 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 180 flow [2023-11-12 02:15:50,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 218.33333333333334) internal successors, (1310), 6 states have internal predecessors, (1310), 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 02:15:50,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:15:50,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:15:50,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:15:50,717 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:15:50,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:50,717 INFO L85 PathProgramCache]: Analyzing trace with hash 964951458, now seen corresponding path program 1 times [2023-11-12 02:15:50,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:50,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181731207] [2023-11-12 02:15:50,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:50,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:15:50,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:50,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181731207] [2023-11-12 02:15:50,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181731207] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:50,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:50,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:15:50,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039280325] [2023-11-12 02:15:50,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:50,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:15:50,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:50,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:15:50,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:15:50,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 488 [2023-11-12 02:15:50,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 43 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 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 02:15:50,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:15:50,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 488 [2023-11-12 02:15:50,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:15:51,272 INFO L124 PetriNetUnfolderBase]: 1489/2364 cut-off events. [2023-11-12 02:15:51,272 INFO L125 PetriNetUnfolderBase]: For 2664/2664 co-relation queries the response was YES. [2023-11-12 02:15:51,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6208 conditions, 2364 events. 1489/2364 cut-off events. For 2664/2664 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10970 event pairs, 437 based on Foata normal form. 54/2257 useless extension candidates. Maximal degree in co-relation 6195. Up to 1611 conditions per place. [2023-11-12 02:15:51,299 INFO L140 encePairwiseOnDemand]: 485/488 looper letters, 45 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-11-12 02:15:51,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 53 transitions, 275 flow [2023-11-12 02:15:51,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:15:51,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:15:51,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 708 transitions. [2023-11-12 02:15:51,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48360655737704916 [2023-11-12 02:15:51,303 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 708 transitions. [2023-11-12 02:15:51,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 708 transitions. [2023-11-12 02:15:51,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:15:51,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 708 transitions. [2023-11-12 02:15:51,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.0) internal successors, (708), 3 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 02:15:51,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:15:51,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:15:51,313 INFO L175 Difference]: Start difference. First operand has 58 places, 43 transitions, 180 flow. Second operand 3 states and 708 transitions. [2023-11-12 02:15:51,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 53 transitions, 275 flow [2023-11-12 02:15:51,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 53 transitions, 244 flow, removed 2 selfloop flow, removed 12 redundant places. [2023-11-12 02:15:51,324 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 130 flow [2023-11-12 02:15:51,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2023-11-12 02:15:51,326 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2023-11-12 02:15:51,326 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 130 flow [2023-11-12 02:15:51,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 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 02:15:51,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:15:51,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:15:51,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:15:51,328 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:15:51,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:51,329 INFO L85 PathProgramCache]: Analyzing trace with hash -2064022664, now seen corresponding path program 1 times [2023-11-12 02:15:51,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:51,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677252915] [2023-11-12 02:15:51,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:51,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:51,448 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 02:15:51,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:51,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677252915] [2023-11-12 02:15:51,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677252915] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:51,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:51,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:15:51,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912026658] [2023-11-12 02:15:51,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:51,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:15:51,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:51,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:15:51,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:15:51,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 488 [2023-11-12 02:15:51,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 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 02:15:51,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:15:51,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 488 [2023-11-12 02:15:51,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:15:51,790 INFO L124 PetriNetUnfolderBase]: 1309/2062 cut-off events. [2023-11-12 02:15:51,790 INFO L125 PetriNetUnfolderBase]: For 1293/1294 co-relation queries the response was YES. [2023-11-12 02:15:51,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5212 conditions, 2062 events. 1309/2062 cut-off events. For 1293/1294 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9129 event pairs, 606 based on Foata normal form. 44/1896 useless extension candidates. Maximal degree in co-relation 5202. Up to 1593 conditions per place. [2023-11-12 02:15:51,810 INFO L140 encePairwiseOnDemand]: 485/488 looper letters, 43 selfloop transitions, 2 changer transitions 3/54 dead transitions. [2023-11-12 02:15:51,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 54 transitions, 262 flow [2023-11-12 02:15:51,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:15:51,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:15:51,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 708 transitions. [2023-11-12 02:15:51,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48360655737704916 [2023-11-12 02:15:51,814 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 708 transitions. [2023-11-12 02:15:51,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 708 transitions. [2023-11-12 02:15:51,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:15:51,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 708 transitions. [2023-11-12 02:15:51,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.0) internal successors, (708), 3 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 02:15:51,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:15:51,821 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:15:51,821 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 130 flow. Second operand 3 states and 708 transitions. [2023-11-12 02:15:51,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 54 transitions, 262 flow [2023-11-12 02:15:51,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 54 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:15:51,826 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 140 flow [2023-11-12 02:15:51,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2023-11-12 02:15:51,829 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2023-11-12 02:15:51,829 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 140 flow [2023-11-12 02:15:51,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 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 02:15:51,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:15:51,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:15:51,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:15:51,830 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:15:51,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:51,831 INFO L85 PathProgramCache]: Analyzing trace with hash -2102531579, now seen corresponding path program 1 times [2023-11-12 02:15:51,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:51,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800313057] [2023-11-12 02:15:51,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:51,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:15:52,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:52,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800313057] [2023-11-12 02:15:52,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800313057] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:52,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:52,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:15:52,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649469163] [2023-11-12 02:15:52,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:52,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:15:52,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:52,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:15:52,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:15:52,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 488 [2023-11-12 02:15:52,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 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 02:15:52,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:15:52,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 488 [2023-11-12 02:15:52,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:15:52,528 INFO L124 PetriNetUnfolderBase]: 1448/2332 cut-off events. [2023-11-12 02:15:52,529 INFO L125 PetriNetUnfolderBase]: For 1721/1721 co-relation queries the response was YES. [2023-11-12 02:15:52,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6135 conditions, 2332 events. 1448/2332 cut-off events. For 1721/1721 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10333 event pairs, 1097 based on Foata normal form. 22/2152 useless extension candidates. Maximal degree in co-relation 6124. Up to 1820 conditions per place. [2023-11-12 02:15:52,558 INFO L140 encePairwiseOnDemand]: 484/488 looper letters, 34 selfloop transitions, 2 changer transitions 18/60 dead transitions. [2023-11-12 02:15:52,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 60 transitions, 295 flow [2023-11-12 02:15:52,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:15:52,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:15:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 893 transitions. [2023-11-12 02:15:52,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574795081967213 [2023-11-12 02:15:52,563 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 893 transitions. [2023-11-12 02:15:52,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 893 transitions. [2023-11-12 02:15:52,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:15:52,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 893 transitions. [2023-11-12 02:15:52,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 223.25) internal successors, (893), 4 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 02:15:52,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 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 02:15:52,615 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 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 02:15:52,615 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 140 flow. Second operand 4 states and 893 transitions. [2023-11-12 02:15:52,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 60 transitions, 295 flow [2023-11-12 02:15:52,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 60 transitions, 293 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:15:52,621 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 152 flow [2023-11-12 02:15:52,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2023-11-12 02:15:52,622 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2023-11-12 02:15:52,622 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 152 flow [2023-11-12 02:15:52,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 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 02:15:52,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:15:52,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:15:52,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:15:52,624 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:15:52,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:52,624 INFO L85 PathProgramCache]: Analyzing trace with hash 45503135, now seen corresponding path program 1 times [2023-11-12 02:15:52,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:52,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161652105] [2023-11-12 02:15:52,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:52,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:15:52,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:52,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161652105] [2023-11-12 02:15:52,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161652105] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:52,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:52,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:15:52,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500755906] [2023-11-12 02:15:52,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:52,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:15:52,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:52,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:15:52,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:15:52,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 488 [2023-11-12 02:15:52,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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 02:15:52,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:15:52,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 488 [2023-11-12 02:15:52,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:15:53,337 INFO L124 PetriNetUnfolderBase]: 1657/2649 cut-off events. [2023-11-12 02:15:53,337 INFO L125 PetriNetUnfolderBase]: For 2001/2001 co-relation queries the response was YES. [2023-11-12 02:15:53,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6950 conditions, 2649 events. 1657/2649 cut-off events. For 2001/2001 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11958 event pairs, 1275 based on Foata normal form. 34/2450 useless extension candidates. Maximal degree in co-relation 6937. Up to 1821 conditions per place. [2023-11-12 02:15:53,356 INFO L140 encePairwiseOnDemand]: 484/488 looper letters, 35 selfloop transitions, 2 changer transitions 19/62 dead transitions. [2023-11-12 02:15:53,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 62 transitions, 321 flow [2023-11-12 02:15:53,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:15:53,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:15:53,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 893 transitions. [2023-11-12 02:15:53,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574795081967213 [2023-11-12 02:15:53,361 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 893 transitions. [2023-11-12 02:15:53,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 893 transitions. [2023-11-12 02:15:53,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:15:53,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 893 transitions. [2023-11-12 02:15:53,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 223.25) internal successors, (893), 4 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 02:15:53,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 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 02:15:53,370 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 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 02:15:53,370 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 152 flow. Second operand 4 states and 893 transitions. [2023-11-12 02:15:53,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 62 transitions, 321 flow [2023-11-12 02:15:53,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 62 transitions, 313 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-12 02:15:53,377 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 160 flow [2023-11-12 02:15:53,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2023-11-12 02:15:53,378 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2023-11-12 02:15:53,379 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 160 flow [2023-11-12 02:15:53,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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 02:15:53,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:15:53,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:15:53,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:15:53,380 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:15:53,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:53,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1500842071, now seen corresponding path program 1 times [2023-11-12 02:15:53,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:53,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631055457] [2023-11-12 02:15:53,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:53,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:15:56,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:56,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631055457] [2023-11-12 02:15:56,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631055457] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:15:56,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653305871] [2023-11-12 02:15:56,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:56,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:56,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64912dff-b991-4455-8d44-d7c1119ea16d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:56,787 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64912dff-b991-4455-8d44-d7c1119ea16d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:56,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64912dff-b991-4455-8d44-d7c1119ea16d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:15:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:57,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-12 02:15:57,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:15:57,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:15:57,672 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-12 02:15:58,003 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:15:58,003 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2023-11-12 02:15:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:15:58,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:02,747 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_191 (Array Int Int)) (~queue2~0.base Int) (~queue2~0.offset Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_191))) (let ((.cse0 (select .cse1 ~queue2~0.base))) (or (< (+ (select .cse0 (+ ~queue2~0.offset (* c_~front2~0 4))) c_~d2~0) (+ (* c_~W~0 2) 1)) (< (+ (select (select .cse1 c_~queue1~0.base) (+ c_~queue1~0.offset (* c_~front1~0 4))) 1) (select .cse0 (+ ~queue2~0.offset (* c_~back2~0 4)))))))) is different from false [2023-11-12 02:16:02,853 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:16:02,854 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 159 treesize of output 203 [2023-11-12 02:16:02,911 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:16:02,912 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 101 [2023-11-12 02:16:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 1 not checked. [2023-11-12 02:16:05,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653305871] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:05,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:05,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 39 [2023-11-12 02:16:05,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455378850] [2023-11-12 02:16:05,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:05,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-12 02:16:05,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:05,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-12 02:16:05,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1360, Unknown=3, NotChecked=74, Total=1560 [2023-11-12 02:16:05,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 488 [2023-11-12 02:16:05,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 160 flow. Second operand has 40 states, 40 states have (on average 133.4) internal successors, (5336), 40 states have internal predecessors, (5336), 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 02:16:05,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:05,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 488 [2023-11-12 02:16:05,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand