./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS --witnessprinter.witness.filename witness.graphml --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 e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 02:24:01,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:24:01,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:24:01,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:24:01,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:24:01,269 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:24:01,270 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:24:01,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:24:01,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:24:01,277 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:24:01,278 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:24:01,280 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:24:01,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:24:01,282 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:24:01,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:24:01,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:24:01,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:24:01,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:24:01,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:24:01,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:24:01,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:24:01,297 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:24:01,298 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:24:01,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:24:01,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:24:01,304 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:24:01,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:24:01,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:24:01,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:24:01,308 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:24:01,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:24:01,310 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:24:01,311 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:24:01,312 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:24:01,314 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:24:01,314 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:24:01,315 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:24:01,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:24:01,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:24:01,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:24:01,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:24:01,320 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 02:24:01,350 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:24:01,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:24:01,351 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:24:01,352 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:24:01,353 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:24:01,353 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:24:01,354 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:24:01,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:24:01,355 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:24:01,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:24:01,356 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:24:01,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:24:01,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:24:01,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:24:01,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 02:24:01,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:24:01,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 02:24:01,358 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:24:01,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 02:24:01,359 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:24:01,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 02:24:01,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:24:01,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:24:01,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:24:01,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:24:01,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:24:01,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:24:01,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 02:24:01,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 02:24:01,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 02:24:01,363 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:24:01,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 02:24:01,364 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:24:01,364 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:24:01,364 INFO L138 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_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 [2022-11-23 02:24:01,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:24:01,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:24:01,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:24:01,756 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:24:01,756 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:24:01,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2022-11-23 02:24:05,468 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:24:05,769 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:24:05,770 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2022-11-23 02:24:05,787 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/data/2bd248da6/cfe0853b977947409272c5e35e10cbfd/FLAG06f89109e [2022-11-23 02:24:05,805 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/data/2bd248da6/cfe0853b977947409272c5e35e10cbfd [2022-11-23 02:24:05,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:24:05,811 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:24:05,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:24:05,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:24:05,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:24:05,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:24:05" (1/1) ... [2022-11-23 02:24:05,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5db3d5a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:05, skipping insertion in model container [2022-11-23 02:24:05,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:24:05" (1/1) ... [2022-11-23 02:24:05,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:24:05,859 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:24:06,084 WARN L237 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_479ffeb4-3adf-4893-a8da-1041c03f8cbd/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2022-11-23 02:24:06,096 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:24:06,109 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 02:24:06,148 WARN L237 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_479ffeb4-3adf-4893-a8da-1041c03f8cbd/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2022-11-23 02:24:06,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:24:06,171 INFO L208 MainTranslator]: Completed translation [2022-11-23 02:24:06,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:06 WrapperNode [2022-11-23 02:24:06,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:24:06,173 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 02:24:06,173 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 02:24:06,173 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 02:24:06,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:06" (1/1) ... [2022-11-23 02:24:06,207 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:06" (1/1) ... [2022-11-23 02:24:06,247 INFO L138 Inliner]: procedures = 25, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 315 [2022-11-23 02:24:06,248 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 02:24:06,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 02:24:06,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 02:24:06,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 02:24:06,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:06" (1/1) ... [2022-11-23 02:24:06,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:06" (1/1) ... [2022-11-23 02:24:06,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:06" (1/1) ... [2022-11-23 02:24:06,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:06" (1/1) ... [2022-11-23 02:24:06,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:06" (1/1) ... [2022-11-23 02:24:06,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:06" (1/1) ... [2022-11-23 02:24:06,306 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:06" (1/1) ... [2022-11-23 02:24:06,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:06" (1/1) ... [2022-11-23 02:24:06,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 02:24:06,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 02:24:06,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 02:24:06,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 02:24:06,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:06" (1/1) ... [2022-11-23 02:24:06,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:24:06,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:24:06,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 02:24:06,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 02:24:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 02:24:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 02:24:06,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 02:24:06,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 02:24:06,429 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 02:24:06,429 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 02:24:06,429 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 02:24:06,430 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 02:24:06,430 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-23 02:24:06,430 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-23 02:24:06,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 02:24:06,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 02:24:06,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 02:24:06,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 02:24:06,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 02:24:06,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 02:24:06,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 02:24:06,433 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 02:24:06,588 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 02:24:06,591 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 02:24:07,260 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 02:24:07,553 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 02:24:07,553 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-23 02:24:07,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:24:07 BoogieIcfgContainer [2022-11-23 02:24:07,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 02:24:07,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 02:24:07,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 02:24:07,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 02:24:07,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:24:05" (1/3) ... [2022-11-23 02:24:07,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3e02bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:24:07, skipping insertion in model container [2022-11-23 02:24:07,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:06" (2/3) ... [2022-11-23 02:24:07,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3e02bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:24:07, skipping insertion in model container [2022-11-23 02:24:07,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:24:07" (3/3) ... [2022-11-23 02:24:07,568 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2022-11-23 02:24:07,580 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 02:24:07,594 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 02:24:07,594 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 02:24:07,595 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 02:24:07,718 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-23 02:24:07,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 267 transitions, 558 flow [2022-11-23 02:24:08,015 INFO L130 PetriNetUnfolder]: 22/264 cut-off events. [2022-11-23 02:24:08,015 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-23 02:24:08,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 264 events. 22/264 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 155 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 224. Up to 3 conditions per place. [2022-11-23 02:24:08,024 INFO L82 GeneralOperation]: Start removeDead. Operand has 255 places, 267 transitions, 558 flow [2022-11-23 02:24:08,033 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 253 transitions, 524 flow [2022-11-23 02:24:08,038 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 02:24:08,057 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 241 places, 253 transitions, 524 flow [2022-11-23 02:24:08,061 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 241 places, 253 transitions, 524 flow [2022-11-23 02:24:08,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 253 transitions, 524 flow [2022-11-23 02:24:08,140 INFO L130 PetriNetUnfolder]: 22/253 cut-off events. [2022-11-23 02:24:08,141 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-23 02:24:08,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 253 events. 22/253 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 154 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 224. Up to 3 conditions per place. [2022-11-23 02:24:08,145 INFO L119 LiptonReduction]: Number of co-enabled transitions 1962 [2022-11-23 02:24:23,059 INFO L134 LiptonReduction]: Checked pairs total: 2901 [2022-11-23 02:24:23,060 INFO L136 LiptonReduction]: Total number of compositions: 270 [2022-11-23 02:24:23,085 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:24:23,093 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=LoopsAndPotentialCycles, 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;@2e4c857c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:24:23,094 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-23 02:24:23,110 INFO L130 PetriNetUnfolder]: 7/30 cut-off events. [2022-11-23 02:24:23,113 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-23 02:24:23,113 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:24:23,114 INFO L209 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] [2022-11-23 02:24:23,115 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:24:23,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:24:23,120 INFO L85 PathProgramCache]: Analyzing trace with hash -146960310, now seen corresponding path program 1 times [2022-11-23 02:24:23,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:24:23,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559586765] [2022-11-23 02:24:23,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:24:23,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:24:23,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:24:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:24:23,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:24:23,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559586765] [2022-11-23 02:24:23,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559586765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:24:23,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:24:23,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:24:23,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918415239] [2022-11-23 02:24:23,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:24:23,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:24:23,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:24:23,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:24:23,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:24:23,826 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 537 [2022-11-23 02:24:23,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 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) [2022-11-23 02:24:23,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:24:23,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 537 [2022-11-23 02:24:23,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:24:24,081 INFO L130 PetriNetUnfolder]: 472/690 cut-off events. [2022-11-23 02:24:24,081 INFO L131 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2022-11-23 02:24:24,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1462 conditions, 690 events. 472/690 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2143 event pairs, 135 based on Foata normal form. 30/575 useless extension candidates. Maximal degree in co-relation 1216. Up to 449 conditions per place. [2022-11-23 02:24:24,088 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 40 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2022-11-23 02:24:24,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 43 transitions, 196 flow [2022-11-23 02:24:24,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:24:24,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:24:24,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 746 transitions. [2022-11-23 02:24:24,107 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46306641837368095 [2022-11-23 02:24:24,108 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 746 transitions. [2022-11-23 02:24:24,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 746 transitions. [2022-11-23 02:24:24,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:24:24,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 746 transitions. [2022-11-23 02:24:24,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 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) [2022-11-23 02:24:24,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 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) [2022-11-23 02:24:24,130 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 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) [2022-11-23 02:24:24,132 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 80 flow. Second operand 3 states and 746 transitions. [2022-11-23 02:24:24,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 43 transitions, 196 flow [2022-11-23 02:24:24,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 180 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-23 02:24:24,139 INFO L231 Difference]: Finished difference. Result has 31 places, 32 transitions, 87 flow [2022-11-23 02:24:24,141 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=31, PETRI_TRANSITIONS=32} [2022-11-23 02:24:24,145 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2022-11-23 02:24:24,145 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 32 transitions, 87 flow [2022-11-23 02:24:24,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 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) [2022-11-23 02:24:24,146 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:24:24,146 INFO L209 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] [2022-11-23 02:24:24,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 02:24:24,147 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:24:24,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:24:24,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1350852902, now seen corresponding path program 1 times [2022-11-23 02:24:24,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:24:24,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716765776] [2022-11-23 02:24:24,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:24:24,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:24:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:24:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:24:24,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:24:24,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716765776] [2022-11-23 02:24:24,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716765776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:24:24,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:24:24,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:24:24,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464246630] [2022-11-23 02:24:24,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:24:24,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:24:24,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:24:24,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:24:24,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:24:24,627 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 537 [2022-11-23 02:24:24,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 32 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 228.75) internal successors, (915), 4 states have internal predecessors, (915), 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) [2022-11-23 02:24:24,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:24:24,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 537 [2022-11-23 02:24:24,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:24:24,926 INFO L130 PetriNetUnfolder]: 529/810 cut-off events. [2022-11-23 02:24:24,927 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-11-23 02:24:24,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1920 conditions, 810 events. 529/810 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2643 event pairs, 371 based on Foata normal form. 52/712 useless extension candidates. Maximal degree in co-relation 753. Up to 691 conditions per place. [2022-11-23 02:24:24,933 INFO L137 encePairwiseOnDemand]: 528/537 looper letters, 31 selfloop transitions, 2 changer transitions 27/60 dead transitions. [2022-11-23 02:24:24,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 60 transitions, 269 flow [2022-11-23 02:24:24,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:24:24,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 02:24:24,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1179 transitions. [2022-11-23 02:24:24,943 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43910614525139663 [2022-11-23 02:24:24,943 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1179 transitions. [2022-11-23 02:24:24,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1179 transitions. [2022-11-23 02:24:24,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:24:24,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1179 transitions. [2022-11-23 02:24:24,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 235.8) internal successors, (1179), 5 states have internal predecessors, (1179), 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) [2022-11-23 02:24:24,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 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) [2022-11-23 02:24:24,960 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 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) [2022-11-23 02:24:24,961 INFO L175 Difference]: Start difference. First operand has 31 places, 32 transitions, 87 flow. Second operand 5 states and 1179 transitions. [2022-11-23 02:24:24,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 60 transitions, 269 flow [2022-11-23 02:24:24,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 60 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:24:24,965 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 114 flow [2022-11-23 02:24:24,965 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2022-11-23 02:24:24,966 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2022-11-23 02:24:24,966 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 114 flow [2022-11-23 02:24:24,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.75) internal successors, (915), 4 states have internal predecessors, (915), 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) [2022-11-23 02:24:24,968 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:24:24,968 INFO L209 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] [2022-11-23 02:24:24,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 02:24:24,969 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:24:24,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:24:24,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1093530481, now seen corresponding path program 1 times [2022-11-23 02:24:24,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:24:24,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037559600] [2022-11-23 02:24:24,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:24:24,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:24:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:24:25,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:24:25,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:24:25,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037559600] [2022-11-23 02:24:25,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037559600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:24:25,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:24:25,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 02:24:25,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510816127] [2022-11-23 02:24:25,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:24:25,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:24:25,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:24:25,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:24:25,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:24:25,324 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 537 [2022-11-23 02:24:25,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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) [2022-11-23 02:24:25,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:24:25,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 537 [2022-11-23 02:24:25,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:24:25,718 INFO L130 PetriNetUnfolder]: 759/1167 cut-off events. [2022-11-23 02:24:25,718 INFO L131 PetriNetUnfolder]: For 631/631 co-relation queries the response was YES. [2022-11-23 02:24:25,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3193 conditions, 1167 events. 759/1167 cut-off events. For 631/631 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4412 event pairs, 563 based on Foata normal form. 56/1040 useless extension candidates. Maximal degree in co-relation 3178. Up to 692 conditions per place. [2022-11-23 02:24:25,727 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 32 selfloop transitions, 2 changer transitions 35/69 dead transitions. [2022-11-23 02:24:25,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 69 transitions, 364 flow [2022-11-23 02:24:25,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:24:25,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 02:24:25,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1185 transitions. [2022-11-23 02:24:25,732 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.441340782122905 [2022-11-23 02:24:25,733 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1185 transitions. [2022-11-23 02:24:25,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1185 transitions. [2022-11-23 02:24:25,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:24:25,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1185 transitions. [2022-11-23 02:24:25,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 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) [2022-11-23 02:24:25,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 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) [2022-11-23 02:24:25,746 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 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) [2022-11-23 02:24:25,746 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 114 flow. Second operand 5 states and 1185 transitions. [2022-11-23 02:24:25,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 69 transitions, 364 flow [2022-11-23 02:24:25,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 69 transitions, 346 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-11-23 02:24:25,751 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 126 flow [2022-11-23 02:24:25,751 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2022-11-23 02:24:25,752 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2022-11-23 02:24:25,752 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 126 flow [2022-11-23 02:24:25,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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) [2022-11-23 02:24:25,754 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:24:25,754 INFO L209 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] [2022-11-23 02:24:25,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 02:24:25,755 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:24:25,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:24:25,755 INFO L85 PathProgramCache]: Analyzing trace with hash 145140520, now seen corresponding path program 1 times [2022-11-23 02:24:25,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:24:25,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850501670] [2022-11-23 02:24:25,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:24:25,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:24:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:24:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:24:25,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:24:25,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850501670] [2022-11-23 02:24:25,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850501670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:24:25,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:24:25,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 02:24:25,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413872982] [2022-11-23 02:24:25,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:24:25,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:24:25,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:24:25,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:24:25,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:24:26,092 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 537 [2022-11-23 02:24:26,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 229.25) internal successors, (917), 4 states have internal predecessors, (917), 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) [2022-11-23 02:24:26,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:24:26,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 537 [2022-11-23 02:24:26,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:24:26,432 INFO L130 PetriNetUnfolder]: 797/1199 cut-off events. [2022-11-23 02:24:26,432 INFO L131 PetriNetUnfolder]: For 865/865 co-relation queries the response was YES. [2022-11-23 02:24:26,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3581 conditions, 1199 events. 797/1199 cut-off events. For 865/865 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4417 event pairs, 586 based on Foata normal form. 70/1032 useless extension candidates. Maximal degree in co-relation 3558. Up to 693 conditions per place. [2022-11-23 02:24:26,441 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 33 selfloop transitions, 2 changer transitions 21/56 dead transitions. [2022-11-23 02:24:26,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 56 transitions, 317 flow [2022-11-23 02:24:26,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:24:26,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 02:24:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 945 transitions. [2022-11-23 02:24:26,446 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4399441340782123 [2022-11-23 02:24:26,446 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 945 transitions. [2022-11-23 02:24:26,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 945 transitions. [2022-11-23 02:24:26,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:24:26,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 945 transitions. [2022-11-23 02:24:26,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 236.25) internal successors, (945), 4 states have internal predecessors, (945), 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) [2022-11-23 02:24:26,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 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) [2022-11-23 02:24:26,458 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 537.0) internal successors, (2685), 5 states have internal predecessors, (2685), 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) [2022-11-23 02:24:26,459 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 126 flow. Second operand 4 states and 945 transitions. [2022-11-23 02:24:26,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 56 transitions, 317 flow [2022-11-23 02:24:26,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 281 flow, removed 17 selfloop flow, removed 4 redundant places. [2022-11-23 02:24:26,464 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 124 flow [2022-11-23 02:24:26,465 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2022-11-23 02:24:26,466 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 6 predicate places. [2022-11-23 02:24:26,466 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 124 flow [2022-11-23 02:24:26,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 229.25) internal successors, (917), 4 states have internal predecessors, (917), 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) [2022-11-23 02:24:26,467 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:24:26,468 INFO L209 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] [2022-11-23 02:24:26,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 02:24:26,468 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:24:26,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:24:26,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1772240567, now seen corresponding path program 1 times [2022-11-23 02:24:26,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:24:26,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673500097] [2022-11-23 02:24:26,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:24:26,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:24:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:24:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:24:26,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:24:26,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673500097] [2022-11-23 02:24:26,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673500097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:24:26,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:24:26,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:24:26,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792140776] [2022-11-23 02:24:26,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:24:26,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:24:26,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:24:26,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:24:26,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:24:26,812 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 537 [2022-11-23 02:24:26,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:24:26,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:24:26,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 537 [2022-11-23 02:24:26,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:24:27,166 INFO L130 PetriNetUnfolder]: 839/1229 cut-off events. [2022-11-23 02:24:27,166 INFO L131 PetriNetUnfolder]: For 362/362 co-relation queries the response was YES. [2022-11-23 02:24:27,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3379 conditions, 1229 events. 839/1229 cut-off events. For 362/362 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4474 event pairs, 317 based on Foata normal form. 1/965 useless extension candidates. Maximal degree in co-relation 3357. Up to 648 conditions per place. [2022-11-23 02:24:27,177 INFO L137 encePairwiseOnDemand]: 534/537 looper letters, 49 selfloop transitions, 2 changer transitions 6/57 dead transitions. [2022-11-23 02:24:27,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 311 flow [2022-11-23 02:24:27,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:24:27,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:24:27,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 753 transitions. [2022-11-23 02:24:27,181 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46741154562383613 [2022-11-23 02:24:27,182 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 753 transitions. [2022-11-23 02:24:27,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 753 transitions. [2022-11-23 02:24:27,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:24:27,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 753 transitions. [2022-11-23 02:24:27,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 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) [2022-11-23 02:24:27,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 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) [2022-11-23 02:24:27,193 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 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) [2022-11-23 02:24:27,193 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 124 flow. Second operand 3 states and 753 transitions. [2022-11-23 02:24:27,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 311 flow [2022-11-23 02:24:27,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 57 transitions, 307 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-23 02:24:27,197 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 134 flow [2022-11-23 02:24:27,197 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2022-11-23 02:24:27,198 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2022-11-23 02:24:27,199 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 134 flow [2022-11-23 02:24:27,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:24:27,200 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:24:27,200 INFO L209 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] [2022-11-23 02:24:27,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 02:24:27,201 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:24:27,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:24:27,201 INFO L85 PathProgramCache]: Analyzing trace with hash -893584695, now seen corresponding path program 1 times [2022-11-23 02:24:27,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:24:27,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457697549] [2022-11-23 02:24:27,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:24:27,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:24:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:24:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:24:27,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:24:27,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457697549] [2022-11-23 02:24:27,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457697549] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:24:27,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713904284] [2022-11-23 02:24:27,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:24:27,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:24:27,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:24:27,507 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:24:27,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 02:24:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:24:27,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 02:24:27,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:24:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:24:27,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:24:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:24:28,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713904284] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:24:28,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:24:28,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-23 02:24:28,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014825167] [2022-11-23 02:24:28,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:24:28,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 02:24:28,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:24:28,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 02:24:28,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-23 02:24:28,431 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 537 [2022-11-23 02:24:28,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 134 flow. Second operand has 11 states, 11 states have (on average 219.0909090909091) internal successors, (2410), 11 states have internal predecessors, (2410), 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) [2022-11-23 02:24:28,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:24:28,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 537 [2022-11-23 02:24:28,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:24:29,087 INFO L130 PetriNetUnfolder]: 1307/1960 cut-off events. [2022-11-23 02:24:29,088 INFO L131 PetriNetUnfolder]: For 829/829 co-relation queries the response was YES. [2022-11-23 02:24:29,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5570 conditions, 1960 events. 1307/1960 cut-off events. For 829/829 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7996 event pairs, 691 based on Foata normal form. 74/1636 useless extension candidates. Maximal degree in co-relation 3488. Up to 1229 conditions per place. [2022-11-23 02:24:29,099 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 34 selfloop transitions, 3 changer transitions 40/77 dead transitions. [2022-11-23 02:24:29,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 77 transitions, 423 flow [2022-11-23 02:24:29,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 02:24:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 02:24:29,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1360 transitions. [2022-11-23 02:24:29,105 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42209807572936064 [2022-11-23 02:24:29,105 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1360 transitions. [2022-11-23 02:24:29,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1360 transitions. [2022-11-23 02:24:29,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:24:29,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1360 transitions. [2022-11-23 02:24:29,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 226.66666666666666) internal successors, (1360), 6 states have internal predecessors, (1360), 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) [2022-11-23 02:24:29,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 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) [2022-11-23 02:24:29,123 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 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) [2022-11-23 02:24:29,123 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 134 flow. Second operand 6 states and 1360 transitions. [2022-11-23 02:24:29,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 77 transitions, 423 flow [2022-11-23 02:24:29,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 77 transitions, 420 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:24:29,127 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 158 flow [2022-11-23 02:24:29,129 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=158, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2022-11-23 02:24:29,132 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2022-11-23 02:24:29,135 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 158 flow [2022-11-23 02:24:29,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 219.0909090909091) internal successors, (2410), 11 states have internal predecessors, (2410), 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) [2022-11-23 02:24:29,136 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:24:29,137 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 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] [2022-11-23 02:24:29,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 02:24:29,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:24:29,345 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:24:29,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:24:29,345 INFO L85 PathProgramCache]: Analyzing trace with hash 2143684118, now seen corresponding path program 2 times [2022-11-23 02:24:29,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:24:29,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650171781] [2022-11-23 02:24:29,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:24:29,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:24:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:24:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 02:24:29,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:24:29,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650171781] [2022-11-23 02:24:29,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650171781] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:24:29,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:24:29,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:24:29,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954652579] [2022-11-23 02:24:29,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:24:29,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:24:29,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:24:29,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:24:29,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:24:29,716 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 537 [2022-11-23 02:24:29,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 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) [2022-11-23 02:24:29,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:24:29,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 537 [2022-11-23 02:24:29,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:24:30,031 INFO L130 PetriNetUnfolder]: 658/965 cut-off events. [2022-11-23 02:24:30,031 INFO L131 PetriNetUnfolder]: For 838/838 co-relation queries the response was YES. [2022-11-23 02:24:30,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3139 conditions, 965 events. 658/965 cut-off events. For 838/838 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3028 event pairs, 269 based on Foata normal form. 38/758 useless extension candidates. Maximal degree in co-relation 3112. Up to 516 conditions per place. [2022-11-23 02:24:30,038 INFO L137 encePairwiseOnDemand]: 533/537 looper letters, 42 selfloop transitions, 3 changer transitions 5/50 dead transitions. [2022-11-23 02:24:30,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 50 transitions, 314 flow [2022-11-23 02:24:30,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:24:30,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:24:30,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 737 transitions. [2022-11-23 02:24:30,042 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45747982619491 [2022-11-23 02:24:30,042 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 737 transitions. [2022-11-23 02:24:30,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 737 transitions. [2022-11-23 02:24:30,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:24:30,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 737 transitions. [2022-11-23 02:24:30,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 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) [2022-11-23 02:24:30,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 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) [2022-11-23 02:24:30,050 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 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) [2022-11-23 02:24:30,050 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 158 flow. Second operand 3 states and 737 transitions. [2022-11-23 02:24:30,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 50 transitions, 314 flow [2022-11-23 02:24:30,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 50 transitions, 286 flow, removed 12 selfloop flow, removed 4 redundant places. [2022-11-23 02:24:30,054 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 167 flow [2022-11-23 02:24:30,055 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2022-11-23 02:24:30,055 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 11 predicate places. [2022-11-23 02:24:30,055 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 167 flow [2022-11-23 02:24:30,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 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) [2022-11-23 02:24:30,056 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:24:30,056 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 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] [2022-11-23 02:24:30,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 02:24:30,057 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:24:30,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:24:30,058 INFO L85 PathProgramCache]: Analyzing trace with hash -642144508, now seen corresponding path program 3 times [2022-11-23 02:24:30,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:24:30,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406762232] [2022-11-23 02:24:30,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:24:30,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:24:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:24:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:24:31,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:24:31,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406762232] [2022-11-23 02:24:31,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406762232] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:24:31,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322331678] [2022-11-23 02:24:31,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:24:31,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:24:31,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:24:31,374 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:24:31,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 02:24:31,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 02:24:31,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:24:31,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 02:24:31,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:24:31,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:24:31,829 INFO L350 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 18 treesize of output 20 [2022-11-23 02:24:31,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-23 02:24:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:24:31,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:24:31,957 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_289 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_289) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2022-11-23 02:24:31,980 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:24:31,981 INFO L350 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 42 treesize of output 38 [2022-11-23 02:24:31,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-23 02:24:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 02:24:32,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322331678] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 02:24:32,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:24:32,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 8] total 23 [2022-11-23 02:24:32,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579803133] [2022-11-23 02:24:32,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:24:32,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 02:24:32,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:24:32,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 02:24:32,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=441, Unknown=1, NotChecked=42, Total=552 [2022-11-23 02:24:32,142 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 537 [2022-11-23 02:24:32,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 167 flow. Second operand has 8 states, 8 states have (on average 206.5) internal successors, (1652), 8 states have internal predecessors, (1652), 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) [2022-11-23 02:24:32,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:24:32,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 537 [2022-11-23 02:24:32,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:24:32,761 INFO L130 PetriNetUnfolder]: 639/1001 cut-off events. [2022-11-23 02:24:32,761 INFO L131 PetriNetUnfolder]: For 656/656 co-relation queries the response was YES. [2022-11-23 02:24:32,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3225 conditions, 1001 events. 639/1001 cut-off events. For 656/656 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3643 event pairs, 56 based on Foata normal form. 12/784 useless extension candidates. Maximal degree in co-relation 3193. Up to 392 conditions per place. [2022-11-23 02:24:32,768 INFO L137 encePairwiseOnDemand]: 523/537 looper letters, 96 selfloop transitions, 25 changer transitions 7/128 dead transitions. [2022-11-23 02:24:32,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 128 transitions, 769 flow [2022-11-23 02:24:32,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 02:24:32,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-23 02:24:32,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2344 transitions. [2022-11-23 02:24:32,778 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3968173353648214 [2022-11-23 02:24:32,779 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2344 transitions. [2022-11-23 02:24:32,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2344 transitions. [2022-11-23 02:24:32,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:24:32,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2344 transitions. [2022-11-23 02:24:32,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 213.0909090909091) internal successors, (2344), 11 states have internal predecessors, (2344), 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) [2022-11-23 02:24:32,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 537.0) internal successors, (6444), 12 states have internal predecessors, (6444), 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) [2022-11-23 02:24:32,799 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 537.0) internal successors, (6444), 12 states have internal predecessors, (6444), 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) [2022-11-23 02:24:32,799 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 167 flow. Second operand 11 states and 2344 transitions. [2022-11-23 02:24:32,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 128 transitions, 769 flow [2022-11-23 02:24:32,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 128 transitions, 744 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-11-23 02:24:32,805 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 363 flow [2022-11-23 02:24:32,806 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=363, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2022-11-23 02:24:32,810 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2022-11-23 02:24:32,810 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 363 flow [2022-11-23 02:24:32,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 206.5) internal successors, (1652), 8 states have internal predecessors, (1652), 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) [2022-11-23 02:24:32,812 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:24:32,812 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 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] [2022-11-23 02:24:32,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 02:24:33,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:24:33,020 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:24:33,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:24:33,021 INFO L85 PathProgramCache]: Analyzing trace with hash -714829262, now seen corresponding path program 4 times [2022-11-23 02:24:33,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:24:33,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144525160] [2022-11-23 02:24:33,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:24:33,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:24:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:24:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:24:33,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:24:33,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144525160] [2022-11-23 02:24:33,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144525160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:24:33,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782227693] [2022-11-23 02:24:33,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:24:33,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:24:33,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:24:33,946 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:24:33,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 02:24:34,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:24:34,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:24:34,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 02:24:34,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:24:34,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:24:34,482 INFO L350 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 19 treesize of output 19 [2022-11-23 02:24:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:24:34,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:24:34,828 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-23 02:24:34,828 INFO L350 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 24 treesize of output 15 [2022-11-23 02:24:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:24:34,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782227693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:24:34,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:24:34,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-11-23 02:24:34,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949986172] [2022-11-23 02:24:34,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:24:34,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 02:24:34,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:24:34,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 02:24:34,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2022-11-23 02:24:35,941 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 537 [2022-11-23 02:24:35,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 363 flow. Second operand has 21 states, 21 states have (on average 202.23809523809524) internal successors, (4247), 21 states have internal predecessors, (4247), 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) [2022-11-23 02:24:35,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:24:35,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 537 [2022-11-23 02:24:35,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:24:38,390 INFO L130 PetriNetUnfolder]: 1969/2969 cut-off events. [2022-11-23 02:24:38,390 INFO L131 PetriNetUnfolder]: For 7685/7685 co-relation queries the response was YES. [2022-11-23 02:24:38,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13378 conditions, 2969 events. 1969/2969 cut-off events. For 7685/7685 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13214 event pairs, 222 based on Foata normal form. 32/2515 useless extension candidates. Maximal degree in co-relation 10101. Up to 1265 conditions per place. [2022-11-23 02:24:38,424 INFO L137 encePairwiseOnDemand]: 527/537 looper letters, 205 selfloop transitions, 47 changer transitions 23/275 dead transitions. [2022-11-23 02:24:38,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 275 transitions, 2297 flow [2022-11-23 02:24:38,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 02:24:38,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-23 02:24:38,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3571 transitions. [2022-11-23 02:24:38,438 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3911709935370796 [2022-11-23 02:24:38,438 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3571 transitions. [2022-11-23 02:24:38,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3571 transitions. [2022-11-23 02:24:38,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:24:38,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3571 transitions. [2022-11-23 02:24:38,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 210.05882352941177) internal successors, (3571), 17 states have internal predecessors, (3571), 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) [2022-11-23 02:24:38,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 537.0) internal successors, (9666), 18 states have internal predecessors, (9666), 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) [2022-11-23 02:24:38,493 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 537.0) internal successors, (9666), 18 states have internal predecessors, (9666), 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) [2022-11-23 02:24:38,493 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 363 flow. Second operand 17 states and 3571 transitions. [2022-11-23 02:24:38,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 275 transitions, 2297 flow [2022-11-23 02:24:38,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 275 transitions, 2239 flow, removed 19 selfloop flow, removed 2 redundant places. [2022-11-23 02:24:38,524 INFO L231 Difference]: Finished difference. Result has 89 places, 111 transitions, 958 flow [2022-11-23 02:24:38,525 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=958, PETRI_PLACES=89, PETRI_TRANSITIONS=111} [2022-11-23 02:24:38,527 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 55 predicate places. [2022-11-23 02:24:38,527 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 111 transitions, 958 flow [2022-11-23 02:24:38,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 202.23809523809524) internal successors, (4247), 21 states have internal predecessors, (4247), 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) [2022-11-23 02:24:38,529 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:24:38,530 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 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] [2022-11-23 02:24:38,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 02:24:38,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-23 02:24:38,737 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:24:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:24:38,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1354921318, now seen corresponding path program 5 times [2022-11-23 02:24:38,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:24:38,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099339555] [2022-11-23 02:24:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:24:38,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:24:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:24:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:24:39,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:24:39,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099339555] [2022-11-23 02:24:39,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099339555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:24:39,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177581802] [2022-11-23 02:24:39,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:24:39,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:24:39,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:24:39,999 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:24:40,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 02:24:40,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:24:40,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:24:40,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 02:24:40,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:24:40,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:24:40,505 INFO L350 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 18 treesize of output 20 [2022-11-23 02:24:40,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-23 02:24:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:24:40,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:24:40,858 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:24:40,858 INFO L350 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 42 treesize of output 38 [2022-11-23 02:24:40,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-23 02:24:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:24:41,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177581802] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:24:41,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:24:41,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 27 [2022-11-23 02:24:41,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757230798] [2022-11-23 02:24:41,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:24:41,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-23 02:24:41,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:24:41,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-23 02:24:41,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=640, Unknown=2, NotChecked=0, Total=756 [2022-11-23 02:24:43,520 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 537 [2022-11-23 02:24:43,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 111 transitions, 958 flow. Second operand has 28 states, 28 states have (on average 198.67857142857142) internal successors, (5563), 28 states have internal predecessors, (5563), 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) [2022-11-23 02:24:43,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:24:43,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 537 [2022-11-23 02:24:43,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:24:47,649 INFO L130 PetriNetUnfolder]: 2942/4597 cut-off events. [2022-11-23 02:24:47,649 INFO L131 PetriNetUnfolder]: For 23178/23178 co-relation queries the response was YES. [2022-11-23 02:24:47,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24320 conditions, 4597 events. 2942/4597 cut-off events. For 23178/23178 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 23682 event pairs, 277 based on Foata normal form. 82/4066 useless extension candidates. Maximal degree in co-relation 20913. Up to 1985 conditions per place. [2022-11-23 02:24:47,731 INFO L137 encePairwiseOnDemand]: 527/537 looper letters, 279 selfloop transitions, 85 changer transitions 19/383 dead transitions. [2022-11-23 02:24:47,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 383 transitions, 3811 flow [2022-11-23 02:24:47,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 02:24:47,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-23 02:24:47,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 5337 transitions. [2022-11-23 02:24:47,753 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3822518263859046 [2022-11-23 02:24:47,754 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 5337 transitions. [2022-11-23 02:24:47,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 5337 transitions. [2022-11-23 02:24:47,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:24:47,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 5337 transitions. [2022-11-23 02:24:47,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 205.26923076923077) internal successors, (5337), 26 states have internal predecessors, (5337), 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) [2022-11-23 02:24:47,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 537.0) internal successors, (14499), 27 states have internal predecessors, (14499), 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) [2022-11-23 02:24:47,811 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 537.0) internal successors, (14499), 27 states have internal predecessors, (14499), 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) [2022-11-23 02:24:47,812 INFO L175 Difference]: Start difference. First operand has 89 places, 111 transitions, 958 flow. Second operand 26 states and 5337 transitions. [2022-11-23 02:24:47,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 383 transitions, 3811 flow [2022-11-23 02:24:47,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 383 transitions, 3628 flow, removed 88 selfloop flow, removed 3 redundant places. [2022-11-23 02:24:47,949 INFO L231 Difference]: Finished difference. Result has 121 places, 162 transitions, 1661 flow [2022-11-23 02:24:47,950 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1661, PETRI_PLACES=121, PETRI_TRANSITIONS=162} [2022-11-23 02:24:47,951 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 87 predicate places. [2022-11-23 02:24:47,952 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 162 transitions, 1661 flow [2022-11-23 02:24:47,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 198.67857142857142) internal successors, (5563), 28 states have internal predecessors, (5563), 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) [2022-11-23 02:24:47,954 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:24:47,955 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 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] [2022-11-23 02:24:47,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 02:24:48,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:24:48,163 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:24:48,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:24:48,163 INFO L85 PathProgramCache]: Analyzing trace with hash 456750268, now seen corresponding path program 6 times [2022-11-23 02:24:48,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:24:48,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591167748] [2022-11-23 02:24:48,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:24:48,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:24:48,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:24:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:24:49,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:24:49,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591167748] [2022-11-23 02:24:49,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591167748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:24:49,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858510036] [2022-11-23 02:24:49,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 02:24:49,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:24:49,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:24:49,409 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:24:49,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 02:24:49,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-23 02:24:49,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:24:49,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 02:24:49,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:24:50,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:24:50,277 INFO L350 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 18 treesize of output 20 [2022-11-23 02:24:50,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:24:50,395 INFO L350 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 18 treesize of output 20 [2022-11-23 02:24:50,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-23 02:24:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:24:50,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:24:50,760 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:24:50,761 INFO L350 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 158 treesize of output 146 [2022-11-23 02:24:50,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 118 [2022-11-23 02:24:50,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 94 [2022-11-23 02:24:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:24:51,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858510036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:24:51,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:24:51,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 29 [2022-11-23 02:24:51,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665414001] [2022-11-23 02:24:51,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:24:51,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-23 02:24:51,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:24:51,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-23 02:24:51,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=735, Unknown=1, NotChecked=0, Total=870 [2022-11-23 02:24:52,778 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 537 [2022-11-23 02:24:52,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 162 transitions, 1661 flow. Second operand has 30 states, 30 states have (on average 172.5) internal successors, (5175), 30 states have internal predecessors, (5175), 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) [2022-11-23 02:24:52,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:24:52,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 537 [2022-11-23 02:24:52,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:24:55,500 INFO L130 PetriNetUnfolder]: 1681/2767 cut-off events. [2022-11-23 02:24:55,501 INFO L131 PetriNetUnfolder]: For 17333/17333 co-relation queries the response was YES. [2022-11-23 02:24:55,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15371 conditions, 2767 events. 1681/2767 cut-off events. For 17333/17333 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13673 event pairs, 180 based on Foata normal form. 128/2557 useless extension candidates. Maximal degree in co-relation 13423. Up to 1097 conditions per place. [2022-11-23 02:24:55,532 INFO L137 encePairwiseOnDemand]: 527/537 looper letters, 212 selfloop transitions, 56 changer transitions 21/289 dead transitions. [2022-11-23 02:24:55,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 289 transitions, 3002 flow [2022-11-23 02:24:55,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 02:24:55,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-23 02:24:55,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4264 transitions. [2022-11-23 02:24:55,550 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3308504034761018 [2022-11-23 02:24:55,550 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4264 transitions. [2022-11-23 02:24:55,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4264 transitions. [2022-11-23 02:24:55,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:24:55,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4264 transitions. [2022-11-23 02:24:55,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 177.66666666666666) internal successors, (4264), 24 states have internal predecessors, (4264), 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) [2022-11-23 02:24:55,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 537.0) internal successors, (13425), 25 states have internal predecessors, (13425), 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) [2022-11-23 02:24:55,594 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 537.0) internal successors, (13425), 25 states have internal predecessors, (13425), 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) [2022-11-23 02:24:55,594 INFO L175 Difference]: Start difference. First operand has 121 places, 162 transitions, 1661 flow. Second operand 24 states and 4264 transitions. [2022-11-23 02:24:55,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 289 transitions, 3002 flow [2022-11-23 02:24:55,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 289 transitions, 2825 flow, removed 67 selfloop flow, removed 15 redundant places. [2022-11-23 02:24:55,684 INFO L231 Difference]: Finished difference. Result has 129 places, 134 transitions, 1394 flow [2022-11-23 02:24:55,685 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1394, PETRI_PLACES=129, PETRI_TRANSITIONS=134} [2022-11-23 02:24:55,686 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 95 predicate places. [2022-11-23 02:24:55,686 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 134 transitions, 1394 flow [2022-11-23 02:24:55,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 172.5) internal successors, (5175), 30 states have internal predecessors, (5175), 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) [2022-11-23 02:24:55,689 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:24:55,689 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 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] [2022-11-23 02:24:55,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 02:24:55,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:24:55,897 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:24:55,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:24:55,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2105611932, now seen corresponding path program 1 times [2022-11-23 02:24:55,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:24:55,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217353631] [2022-11-23 02:24:55,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:24:55,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:24:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:24:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 02:24:56,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:24:56,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217353631] [2022-11-23 02:24:56,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217353631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:24:56,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133616859] [2022-11-23 02:24:56,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:24:56,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:24:56,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:24:56,172 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:24:56,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 02:24:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:24:56,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 02:24:56,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:24:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 02:24:56,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:24:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 02:24:56,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133616859] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:24:56,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:24:56,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-23 02:24:56,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334835164] [2022-11-23 02:24:56,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:24:56,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 02:24:56,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:24:56,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 02:24:56,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-23 02:24:56,942 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 537 [2022-11-23 02:24:56,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 134 transitions, 1394 flow. Second operand has 11 states, 11 states have (on average 219.0) internal successors, (2409), 11 states have internal predecessors, (2409), 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) [2022-11-23 02:24:56,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:24:56,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 537 [2022-11-23 02:24:56,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:24:58,411 INFO L130 PetriNetUnfolder]: 2636/4472 cut-off events. [2022-11-23 02:24:58,412 INFO L131 PetriNetUnfolder]: For 29431/29431 co-relation queries the response was YES. [2022-11-23 02:24:58,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24587 conditions, 4472 events. 2636/4472 cut-off events. For 29431/29431 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 25083 event pairs, 854 based on Foata normal form. 320/4264 useless extension candidates. Maximal degree in co-relation 22106. Up to 2663 conditions per place. [2022-11-23 02:24:58,459 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 174 selfloop transitions, 9 changer transitions 59/242 dead transitions. [2022-11-23 02:24:58,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 242 transitions, 2994 flow [2022-11-23 02:24:58,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 02:24:58,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 02:24:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1356 transitions. [2022-11-23 02:24:58,463 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4208566108007449 [2022-11-23 02:24:58,463 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1356 transitions. [2022-11-23 02:24:58,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1356 transitions. [2022-11-23 02:24:58,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:24:58,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1356 transitions. [2022-11-23 02:24:58,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 226.0) internal successors, (1356), 6 states have internal predecessors, (1356), 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) [2022-11-23 02:24:58,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 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) [2022-11-23 02:24:58,473 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 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) [2022-11-23 02:24:58,473 INFO L175 Difference]: Start difference. First operand has 129 places, 134 transitions, 1394 flow. Second operand 6 states and 1356 transitions. [2022-11-23 02:24:58,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 242 transitions, 2994 flow [2022-11-23 02:24:58,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 242 transitions, 2851 flow, removed 30 selfloop flow, removed 14 redundant places. [2022-11-23 02:24:58,612 INFO L231 Difference]: Finished difference. Result has 118 places, 137 transitions, 1407 flow [2022-11-23 02:24:58,613 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1407, PETRI_PLACES=118, PETRI_TRANSITIONS=137} [2022-11-23 02:24:58,615 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 84 predicate places. [2022-11-23 02:24:58,615 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 137 transitions, 1407 flow [2022-11-23 02:24:58,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 219.0) internal successors, (2409), 11 states have internal predecessors, (2409), 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) [2022-11-23 02:24:58,616 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:24:58,616 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2022-11-23 02:24:58,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 02:24:58,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 02:24:58,824 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:24:58,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:24:58,824 INFO L85 PathProgramCache]: Analyzing trace with hash 753340699, now seen corresponding path program 2 times [2022-11-23 02:24:58,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:24:58,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773891996] [2022-11-23 02:24:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:24:58,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:24:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:25:00,465 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:25:00,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:25:00,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773891996] [2022-11-23 02:25:00,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773891996] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:25:00,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098293294] [2022-11-23 02:25:00,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:25:00,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:25:00,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:25:00,468 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:25:00,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 02:25:00,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:25:00,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:25:00,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-23 02:25:00,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:25:01,791 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-11-23 02:25:01,792 INFO L350 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 40 treesize of output 12 [2022-11-23 02:25:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:25:01,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:25:02,406 INFO L321 Elim1Store]: treesize reduction 4, result has 96.0 percent of original size [2022-11-23 02:25:02,407 INFO L350 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 45 treesize of output 109 [2022-11-23 02:25:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 02:25:03,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098293294] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 02:25:03,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:25:03,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [15, 12] total 33 [2022-11-23 02:25:03,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515976960] [2022-11-23 02:25:03,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:25:03,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 02:25:03,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:25:03,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 02:25:03,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 02:25:03,363 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 537 [2022-11-23 02:25:03,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 137 transitions, 1407 flow. Second operand has 8 states, 8 states have (on average 217.75) internal successors, (1742), 8 states have internal predecessors, (1742), 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) [2022-11-23 02:25:03,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:25:03,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 537 [2022-11-23 02:25:03,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:25:04,982 INFO L130 PetriNetUnfolder]: 2290/4034 cut-off events. [2022-11-23 02:25:04,982 INFO L131 PetriNetUnfolder]: For 25292/25292 co-relation queries the response was YES. [2022-11-23 02:25:05,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22194 conditions, 4034 events. 2290/4034 cut-off events. For 25292/25292 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 22927 event pairs, 478 based on Foata normal form. 80/3760 useless extension candidates. Maximal degree in co-relation 18228. Up to 2626 conditions per place. [2022-11-23 02:25:05,030 INFO L137 encePairwiseOnDemand]: 525/537 looper letters, 150 selfloop transitions, 56 changer transitions 9/215 dead transitions. [2022-11-23 02:25:05,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 215 transitions, 2686 flow [2022-11-23 02:25:05,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 02:25:05,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-23 02:25:05,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2223 transitions. [2022-11-23 02:25:05,038 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41396648044692735 [2022-11-23 02:25:05,038 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2223 transitions. [2022-11-23 02:25:05,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2223 transitions. [2022-11-23 02:25:05,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:25:05,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2223 transitions. [2022-11-23 02:25:05,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 222.3) internal successors, (2223), 10 states have internal predecessors, (2223), 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) [2022-11-23 02:25:05,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 537.0) internal successors, (5907), 11 states have internal predecessors, (5907), 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) [2022-11-23 02:25:05,057 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 537.0) internal successors, (5907), 11 states have internal predecessors, (5907), 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) [2022-11-23 02:25:05,057 INFO L175 Difference]: Start difference. First operand has 118 places, 137 transitions, 1407 flow. Second operand 10 states and 2223 transitions. [2022-11-23 02:25:05,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 215 transitions, 2686 flow [2022-11-23 02:25:05,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 215 transitions, 2626 flow, removed 23 selfloop flow, removed 3 redundant places. [2022-11-23 02:25:05,209 INFO L231 Difference]: Finished difference. Result has 129 places, 165 transitions, 1966 flow [2022-11-23 02:25:05,210 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=1368, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1966, PETRI_PLACES=129, PETRI_TRANSITIONS=165} [2022-11-23 02:25:05,211 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 95 predicate places. [2022-11-23 02:25:05,211 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 165 transitions, 1966 flow [2022-11-23 02:25:05,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 217.75) internal successors, (1742), 8 states have internal predecessors, (1742), 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) [2022-11-23 02:25:05,212 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:25:05,212 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2022-11-23 02:25:05,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 02:25:05,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 02:25:05,420 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:25:05,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:25:05,421 INFO L85 PathProgramCache]: Analyzing trace with hash -200154463, now seen corresponding path program 3 times [2022-11-23 02:25:05,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:25:05,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595671319] [2022-11-23 02:25:05,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:25:05,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:25:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:25:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:25:07,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:25:07,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595671319] [2022-11-23 02:25:07,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595671319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:25:07,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806185155] [2022-11-23 02:25:07,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:25:07,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:25:07,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:25:07,474 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:25:07,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 02:25:07,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 02:25:07,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:25:07,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-23 02:25:08,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:25:08,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:25:08,294 INFO L350 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 18 treesize of output 20 [2022-11-23 02:25:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:25:08,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:25:08,796 WARN L837 $PredicateComparison]: unable to prove that (forall ((~q2~0.base Int) (~q2~0.offset Int) (v_ArrVal_685 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_685))) (let ((.cse0 (select .cse1 ~q2~0.base))) (or (< 0 (select .cse0 (+ ~q2~0.offset (* c_~q2_front~0 4)))) (< (+ (select .cse0 (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) (select (select .cse1 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))))) is different from false [2022-11-23 02:25:08,869 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:25:08,870 INFO L350 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 147 treesize of output 199 [2022-11-23 02:25:08,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:25:08,920 INFO L350 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 87 treesize of output 101 [2022-11-23 02:25:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 02:25:10,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806185155] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 02:25:10,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:25:10,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [16, 10] total 32 [2022-11-23 02:25:10,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588843183] [2022-11-23 02:25:10,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:25:10,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 02:25:10,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:25:10,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 02:25:10,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=900, Unknown=1, NotChecked=60, Total=1056 [2022-11-23 02:25:11,010 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 537 [2022-11-23 02:25:11,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 165 transitions, 1966 flow. Second operand has 9 states, 9 states have (on average 200.33333333333334) internal successors, (1803), 9 states have internal predecessors, (1803), 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) [2022-11-23 02:25:11,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:25:11,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 537 [2022-11-23 02:25:11,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:25:22,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:25:24,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:25:28,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:25:31,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:25:33,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:25:35,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:25:37,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:25:39,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:25:41,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:25:43,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:25:44,834 INFO L130 PetriNetUnfolder]: 3383/5825 cut-off events. [2022-11-23 02:25:44,834 INFO L131 PetriNetUnfolder]: For 42912/42912 co-relation queries the response was YES. [2022-11-23 02:25:44,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34382 conditions, 5825 events. 3383/5825 cut-off events. For 42912/42912 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 34937 event pairs, 797 based on Foata normal form. 44/5333 useless extension candidates. Maximal degree in co-relation 28880. Up to 2812 conditions per place. [2022-11-23 02:25:44,905 INFO L137 encePairwiseOnDemand]: 522/537 looper letters, 234 selfloop transitions, 86 changer transitions 0/320 dead transitions. [2022-11-23 02:25:44,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 320 transitions, 4671 flow [2022-11-23 02:25:44,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 02:25:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 02:25:44,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2463 transitions. [2022-11-23 02:25:44,911 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38221601489757917 [2022-11-23 02:25:44,912 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2463 transitions. [2022-11-23 02:25:44,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2463 transitions. [2022-11-23 02:25:44,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:25:44,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2463 transitions. [2022-11-23 02:25:44,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 205.25) internal successors, (2463), 12 states have internal predecessors, (2463), 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) [2022-11-23 02:25:44,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 537.0) internal successors, (6981), 13 states have internal predecessors, (6981), 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) [2022-11-23 02:25:44,926 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 537.0) internal successors, (6981), 13 states have internal predecessors, (6981), 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) [2022-11-23 02:25:44,927 INFO L175 Difference]: Start difference. First operand has 129 places, 165 transitions, 1966 flow. Second operand 12 states and 2463 transitions. [2022-11-23 02:25:44,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 320 transitions, 4671 flow [2022-11-23 02:25:45,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 320 transitions, 4553 flow, removed 59 selfloop flow, removed 0 redundant places. [2022-11-23 02:25:45,316 INFO L231 Difference]: Finished difference. Result has 147 places, 218 transitions, 3065 flow [2022-11-23 02:25:45,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3065, PETRI_PLACES=147, PETRI_TRANSITIONS=218} [2022-11-23 02:25:45,318 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 113 predicate places. [2022-11-23 02:25:45,318 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 218 transitions, 3065 flow [2022-11-23 02:25:45,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 200.33333333333334) internal successors, (1803), 9 states have internal predecessors, (1803), 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) [2022-11-23 02:25:45,319 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:25:45,319 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2022-11-23 02:25:45,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 02:25:45,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 02:25:45,527 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:25:45,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:25:45,528 INFO L85 PathProgramCache]: Analyzing trace with hash 723762637, now seen corresponding path program 4 times [2022-11-23 02:25:45,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:25:45,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827648214] [2022-11-23 02:25:45,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:25:45,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:25:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:25:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:25:47,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:25:47,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827648214] [2022-11-23 02:25:47,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827648214] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:25:47,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756672781] [2022-11-23 02:25:47,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:25:47,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:25:47,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:25:47,577 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:25:47,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 02:25:47,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:25:47,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:25:47,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-23 02:25:47,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:25:47,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 414 treesize of output 406 [2022-11-23 02:25:48,485 INFO L350 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 18 treesize of output 20 [2022-11-23 02:25:49,078 INFO L321 Elim1Store]: treesize reduction 9, result has 91.9 percent of original size [2022-11-23 02:25:49,078 INFO L350 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 59 treesize of output 117 [2022-11-23 02:25:49,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:25:49,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:25:50,611 INFO L321 Elim1Store]: treesize reduction 8, result has 92.1 percent of original size [2022-11-23 02:25:50,612 INFO L350 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 184 treesize of output 220 [2022-11-23 02:25:50,669 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:25:50,669 INFO L350 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 116 treesize of output 124 [2022-11-23 02:25:53,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:25:53,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756672781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:25:53,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:25:53,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2022-11-23 02:25:53,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724014651] [2022-11-23 02:25:53,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:25:53,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-23 02:25:53,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:25:53,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-23 02:25:53,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1541, Unknown=6, NotChecked=0, Total=1722 [2022-11-23 02:25:57,375 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 537 [2022-11-23 02:25:57,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 218 transitions, 3065 flow. Second operand has 42 states, 42 states have (on average 165.97619047619048) internal successors, (6971), 42 states have internal predecessors, (6971), 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) [2022-11-23 02:25:57,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:25:57,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 537 [2022-11-23 02:25:57,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:26:24,920 INFO L130 PetriNetUnfolder]: 4923/8609 cut-off events. [2022-11-23 02:26:24,920 INFO L131 PetriNetUnfolder]: For 69725/69725 co-relation queries the response was YES. [2022-11-23 02:26:24,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52241 conditions, 8609 events. 4923/8609 cut-off events. For 69725/69725 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 57401 event pairs, 1273 based on Foata normal form. 96/7847 useless extension candidates. Maximal degree in co-relation 42423. Up to 3881 conditions per place. [2022-11-23 02:26:24,996 INFO L137 encePairwiseOnDemand]: 522/537 looper letters, 487 selfloop transitions, 155 changer transitions 82/724 dead transitions. [2022-11-23 02:26:24,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 724 transitions, 9689 flow [2022-11-23 02:26:24,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-23 02:26:24,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-11-23 02:26:25,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 9391 transitions. [2022-11-23 02:26:25,013 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31796174030810903 [2022-11-23 02:26:25,013 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 9391 transitions. [2022-11-23 02:26:25,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 9391 transitions. [2022-11-23 02:26:25,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:26:25,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 9391 transitions. [2022-11-23 02:26:25,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 170.74545454545455) internal successors, (9391), 55 states have internal predecessors, (9391), 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) [2022-11-23 02:26:25,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 537.0) internal successors, (30072), 56 states have internal predecessors, (30072), 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) [2022-11-23 02:26:25,063 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 537.0) internal successors, (30072), 56 states have internal predecessors, (30072), 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) [2022-11-23 02:26:25,063 INFO L175 Difference]: Start difference. First operand has 147 places, 218 transitions, 3065 flow. Second operand 55 states and 9391 transitions. [2022-11-23 02:26:25,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 724 transitions, 9689 flow [2022-11-23 02:26:25,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 724 transitions, 9591 flow, removed 15 selfloop flow, removed 3 redundant places. [2022-11-23 02:26:25,657 INFO L231 Difference]: Finished difference. Result has 231 places, 359 transitions, 5844 flow [2022-11-23 02:26:25,658 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=3020, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=5844, PETRI_PLACES=231, PETRI_TRANSITIONS=359} [2022-11-23 02:26:25,658 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 197 predicate places. [2022-11-23 02:26:25,658 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 359 transitions, 5844 flow [2022-11-23 02:26:25,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 165.97619047619048) internal successors, (6971), 42 states have internal predecessors, (6971), 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) [2022-11-23 02:26:25,660 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:26:25,660 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2022-11-23 02:26:25,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 02:26:25,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 02:26:25,867 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:26:25,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:26:25,868 INFO L85 PathProgramCache]: Analyzing trace with hash -880236275, now seen corresponding path program 5 times [2022-11-23 02:26:25,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:26:25,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059795199] [2022-11-23 02:26:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:26:25,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:26:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:26:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:26:28,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:26:28,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059795199] [2022-11-23 02:26:28,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059795199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:26:28,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145750881] [2022-11-23 02:26:28,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:26:28,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:26:28,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:26:28,154 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:26:28,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ffeb4-3adf-4893-a8da-1041c03f8cbd/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 02:26:28,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:26:28,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:26:28,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-23 02:26:28,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:26:28,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:26:28,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:26:28,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:26:28,565 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-23 02:26:28,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-23 02:26:28,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 02:26:28,861 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 02:26:28,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-23 02:26:29,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 02:26:29,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 02:26:29,442 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-23 02:26:29,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 02:26:29,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 02:26:29,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 02:26:29,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 02:26:30,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:26:30,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:26:30,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 42 [2022-11-23 02:26:32,825 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-23 02:26:32,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 20 [2022-11-23 02:26:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:26:33,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:26:36,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:26:36,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 108 [2022-11-23 02:26:36,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 02:26:36,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264001 treesize of output 258881 [2022-11-23 02:26:37,261 INFO L321 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2022-11-23 02:26:37,264 INFO L350 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 258881 treesize of output 203557 [2022-11-23 02:26:39,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:26:39,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:26:39,066 INFO L350 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 203263 treesize of output 175607 [2022-11-23 02:26:39,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:26:39,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:26:39,972 INFO L350 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 175865 treesize of output 159729 [2022-11-23 02:26:40,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159212 treesize of output 151532 [2022-11-23 02:26:41,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 502 treesize of output 406