./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN --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 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 --- 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-6b4ec56 [2022-11-20 10:38:26,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:38:26,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:38:26,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:38:26,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:38:26,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:38:26,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:38:26,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:38:26,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:38:26,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:38:26,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:38:26,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:38:26,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:38:26,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:38:26,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:38:26,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:38:26,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:38:26,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:38:26,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:38:26,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:38:26,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:38:26,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:38:26,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:38:26,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:38:26,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:38:26,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:38:26,197 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:38:26,198 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:38:26,200 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:38:26,201 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:38:26,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:38:26,204 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:38:26,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:38:26,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:38:26,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:38:26,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:38:26,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:38:26,210 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:38:26,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:38:26,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:38:26,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:38:26,214 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:38:26,253 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:38:26,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:38:26,254 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:38:26,255 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:38:26,256 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:38:26,256 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:38:26,257 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:38:26,257 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:38:26,257 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:38:26,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:38:26,259 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:38:26,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:38:26,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:38:26,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:38:26,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:38:26,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:38:26,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:38:26,261 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:38:26,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:38:26,261 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:38:26,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:38:26,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:38:26,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:38:26,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:38:26,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:38:26,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:38:26,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:38:26,263 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:38:26,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:38:26,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:38:26,264 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:38:26,265 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:38:26,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:38:26,265 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 [2022-11-20 10:38:26,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:38:26,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:38:26,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:38:26,628 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:38:26,628 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:38:26,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2022-11-20 10:38:29,713 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:38:29,947 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:38:29,948 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2022-11-20 10:38:29,955 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/data/09061fdc9/3eba219a502b434e9b61b9aff6b0c297/FLAG4cee8fb56 [2022-11-20 10:38:29,970 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/data/09061fdc9/3eba219a502b434e9b61b9aff6b0c297 [2022-11-20 10:38:29,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:38:29,975 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:38:29,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:38:29,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:38:29,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:38:29,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:38:29" (1/1) ... [2022-11-20 10:38:29,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3209c0f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:29, skipping insertion in model container [2022-11-20 10:38:29,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:38:29" (1/1) ... [2022-11-20 10:38:29,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:38:30,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:38:30,270 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_dd756801-2a36-4cf6-a253-3434dcecdd3c/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c[2728,2741] [2022-11-20 10:38:30,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:38:30,310 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:38:30,342 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_dd756801-2a36-4cf6-a253-3434dcecdd3c/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c[2728,2741] [2022-11-20 10:38:30,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:38:30,361 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:38:30,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:30 WrapperNode [2022-11-20 10:38:30,363 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:38:30,364 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:38:30,364 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:38:30,364 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:38:30,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:30" (1/1) ... [2022-11-20 10:38:30,390 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:30" (1/1) ... [2022-11-20 10:38:30,422 INFO L138 Inliner]: procedures = 26, calls = 49, calls flagged for inlining = 13, calls inlined = 21, statements flattened = 277 [2022-11-20 10:38:30,423 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:38:30,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:38:30,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:38:30,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:38:30,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:30" (1/1) ... [2022-11-20 10:38:30,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:30" (1/1) ... [2022-11-20 10:38:30,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:30" (1/1) ... [2022-11-20 10:38:30,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:30" (1/1) ... [2022-11-20 10:38:30,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:30" (1/1) ... [2022-11-20 10:38:30,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:30" (1/1) ... [2022-11-20 10:38:30,455 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:30" (1/1) ... [2022-11-20 10:38:30,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:30" (1/1) ... [2022-11-20 10:38:30,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:38:30,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:38:30,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:38:30,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:38:30,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:30" (1/1) ... [2022-11-20 10:38:30,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:38:30,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:30,500 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:38:30,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:38:30,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:38:30,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:38:30,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:38:30,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:38:30,559 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 10:38:30,559 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 10:38:30,560 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 10:38:30,560 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 10:38:30,560 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 10:38:30,560 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 10:38:30,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:38:30,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 10:38:30,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:38:30,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:38:30,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:38:30,562 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 10:38:30,675 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:38:30,678 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:38:31,337 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:38:31,348 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:38:31,348 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-20 10:38:31,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:38:31 BoogieIcfgContainer [2022-11-20 10:38:31,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:38:31,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:38:31,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:38:31,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:38:31,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:38:29" (1/3) ... [2022-11-20 10:38:31,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f8798ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:38:31, skipping insertion in model container [2022-11-20 10:38:31,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:30" (2/3) ... [2022-11-20 10:38:31,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f8798ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:38:31, skipping insertion in model container [2022-11-20 10:38:31,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:38:31" (3/3) ... [2022-11-20 10:38:31,360 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2022-11-20 10:38:31,371 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 10:38:31,381 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:38:31,382 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:38:31,382 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:38:31,544 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 10:38:31,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 350 transitions, 724 flow [2022-11-20 10:38:31,727 INFO L130 PetriNetUnfolder]: 28/347 cut-off events. [2022-11-20 10:38:31,728 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 10:38:31,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 347 events. 28/347 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 583 event pairs, 0 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 269. Up to 3 conditions per place. [2022-11-20 10:38:31,740 INFO L82 GeneralOperation]: Start removeDead. Operand has 332 places, 350 transitions, 724 flow [2022-11-20 10:38:31,748 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 318 places, 336 transitions, 690 flow [2022-11-20 10:38:31,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:38:31,764 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;@5d912c9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:38:31,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-20 10:38:31,897 INFO L130 PetriNetUnfolder]: 27/332 cut-off events. [2022-11-20 10:38:31,897 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 10:38:31,897 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:31,899 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-11-20 10:38:31,900 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)] === [2022-11-20 10:38:31,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:31,905 INFO L85 PathProgramCache]: Analyzing trace with hash 845810423, now seen corresponding path program 1 times [2022-11-20 10:38:31,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:31,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123694689] [2022-11-20 10:38:31,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:31,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:32,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:32,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123694689] [2022-11-20 10:38:32,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123694689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:32,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:32,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:38:32,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098539893] [2022-11-20 10:38:32,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:32,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:38:32,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:32,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:38:32,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:38:32,330 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 350 [2022-11-20 10:38:32,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 336 transitions, 690 flow. Second operand has 2 states, 2 states have (on average 330.0) internal successors, (660), 2 states have internal predecessors, (660), 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) [2022-11-20 10:38:32,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:32,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 350 [2022-11-20 10:38:32,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:38:32,436 INFO L130 PetriNetUnfolder]: 9/317 cut-off events. [2022-11-20 10:38:32,437 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-20 10:38:32,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 317 events. 9/317 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 562 event pairs, 0 based on Foata normal form. 25/320 useless extension candidates. Maximal degree in co-relation 256. Up to 7 conditions per place. [2022-11-20 10:38:32,446 INFO L137 encePairwiseOnDemand]: 331/350 looper letters, 6 selfloop transitions, 0 changer transitions 7/317 dead transitions. [2022-11-20 10:38:32,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 317 transitions, 664 flow [2022-11-20 10:38:32,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:38:32,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 10:38:32,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 673 transitions. [2022-11-20 10:38:32,468 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9614285714285714 [2022-11-20 10:38:32,470 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 673 transitions. [2022-11-20 10:38:32,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 673 transitions. [2022-11-20 10:38:32,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:38:32,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 673 transitions. [2022-11-20 10:38:32,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 336.5) internal successors, (673), 2 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:32,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 350.0) internal successors, (1050), 3 states have internal predecessors, (1050), 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) [2022-11-20 10:38:32,494 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 350.0) internal successors, (1050), 3 states have internal predecessors, (1050), 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) [2022-11-20 10:38:32,496 INFO L175 Difference]: Start difference. First operand has 318 places, 336 transitions, 690 flow. Second operand 2 states and 673 transitions. [2022-11-20 10:38:32,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 317 transitions, 664 flow [2022-11-20 10:38:32,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 317 transitions, 652 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-20 10:38:32,512 INFO L231 Difference]: Finished difference. Result has 313 places, 310 transitions, 626 flow [2022-11-20 10:38:32,515 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=626, PETRI_PLACES=313, PETRI_TRANSITIONS=310} [2022-11-20 10:38:32,521 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, -5 predicate places. [2022-11-20 10:38:32,521 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 310 transitions, 626 flow [2022-11-20 10:38:32,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 330.0) internal successors, (660), 2 states have internal predecessors, (660), 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) [2022-11-20 10:38:32,523 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:32,523 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-11-20 10:38:32,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:38:32,524 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)] === [2022-11-20 10:38:32,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:32,526 INFO L85 PathProgramCache]: Analyzing trace with hash 833383285, now seen corresponding path program 1 times [2022-11-20 10:38:32,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:32,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583784670] [2022-11-20 10:38:32,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:32,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:33,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:33,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583784670] [2022-11-20 10:38:33,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583784670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:33,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:33,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-20 10:38:33,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902547224] [2022-11-20 10:38:33,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:33,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:38:33,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:33,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:38:33,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:38:33,584 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 350 [2022-11-20 10:38:33,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 310 transitions, 626 flow. Second operand has 14 states, 14 states have (on average 248.5) internal successors, (3479), 14 states have internal predecessors, (3479), 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) [2022-11-20 10:38:33,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:33,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 350 [2022-11-20 10:38:33,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:38:35,447 INFO L130 PetriNetUnfolder]: 535/4795 cut-off events. [2022-11-20 10:38:35,448 INFO L131 PetriNetUnfolder]: For 63/74 co-relation queries the response was YES. [2022-11-20 10:38:35,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5595 conditions, 4795 events. 535/4795 cut-off events. For 63/74 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 47999 event pairs, 282 based on Foata normal form. 1/4297 useless extension candidates. Maximal degree in co-relation 5592. Up to 265 conditions per place. [2022-11-20 10:38:35,497 INFO L137 encePairwiseOnDemand]: 328/350 looper letters, 135 selfloop transitions, 21 changer transitions 6/393 dead transitions. [2022-11-20 10:38:35,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 393 transitions, 1129 flow [2022-11-20 10:38:35,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 10:38:35,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-20 10:38:35,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 5043 transitions. [2022-11-20 10:38:35,511 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7204285714285714 [2022-11-20 10:38:35,511 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 5043 transitions. [2022-11-20 10:38:35,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 5043 transitions. [2022-11-20 10:38:35,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:38:35,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 5043 transitions. [2022-11-20 10:38:35,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 252.15) internal successors, (5043), 20 states have internal predecessors, (5043), 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) [2022-11-20 10:38:35,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 350.0) internal successors, (7350), 21 states have internal predecessors, (7350), 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) [2022-11-20 10:38:35,546 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 350.0) internal successors, (7350), 21 states have internal predecessors, (7350), 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) [2022-11-20 10:38:35,546 INFO L175 Difference]: Start difference. First operand has 313 places, 310 transitions, 626 flow. Second operand 20 states and 5043 transitions. [2022-11-20 10:38:35,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 393 transitions, 1129 flow [2022-11-20 10:38:35,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 393 transitions, 1129 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:38:35,562 INFO L231 Difference]: Finished difference. Result has 336 places, 322 transitions, 743 flow [2022-11-20 10:38:35,562 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=743, PETRI_PLACES=336, PETRI_TRANSITIONS=322} [2022-11-20 10:38:35,563 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 18 predicate places. [2022-11-20 10:38:35,563 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 322 transitions, 743 flow [2022-11-20 10:38:35,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 248.5) internal successors, (3479), 14 states have internal predecessors, (3479), 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) [2022-11-20 10:38:35,567 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:35,568 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:35,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:38:35,568 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)] === [2022-11-20 10:38:35,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:35,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1952499687, now seen corresponding path program 1 times [2022-11-20 10:38:35,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:35,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250100394] [2022-11-20 10:38:35,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:35,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:36,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:36,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250100394] [2022-11-20 10:38:36,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250100394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:36,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784429981] [2022-11-20 10:38:36,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:36,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:36,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:36,279 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:36,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:38:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:36,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:38:36,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:37,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:37,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784429981] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:37,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:37,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [15, 13] total 28 [2022-11-20 10:38:37,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256412604] [2022-11-20 10:38:37,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:37,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:38:37,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:37,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:38:37,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-11-20 10:38:37,692 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 350 [2022-11-20 10:38:37,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 322 transitions, 743 flow. Second operand has 13 states, 13 states have (on average 249.15384615384616) internal successors, (3239), 13 states have internal predecessors, (3239), 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) [2022-11-20 10:38:37,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:37,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 350 [2022-11-20 10:38:37,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:38:39,755 INFO L130 PetriNetUnfolder]: 769/6628 cut-off events. [2022-11-20 10:38:39,755 INFO L131 PetriNetUnfolder]: For 214/214 co-relation queries the response was YES. [2022-11-20 10:38:39,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7958 conditions, 6628 events. 769/6628 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 71512 event pairs, 440 based on Foata normal form. 1/5938 useless extension candidates. Maximal degree in co-relation 7943. Up to 361 conditions per place. [2022-11-20 10:38:39,816 INFO L137 encePairwiseOnDemand]: 328/350 looper letters, 142 selfloop transitions, 26 changer transitions 4/404 dead transitions. [2022-11-20 10:38:39,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 404 transitions, 1288 flow [2022-11-20 10:38:39,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 10:38:39,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-20 10:38:39,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4320 transitions. [2022-11-20 10:38:39,826 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7260504201680672 [2022-11-20 10:38:39,826 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4320 transitions. [2022-11-20 10:38:39,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4320 transitions. [2022-11-20 10:38:39,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:38:39,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4320 transitions. [2022-11-20 10:38:39,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 254.11764705882354) internal successors, (4320), 17 states have internal predecessors, (4320), 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) [2022-11-20 10:38:39,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 350.0) internal successors, (6300), 18 states have internal predecessors, (6300), 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) [2022-11-20 10:38:39,853 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 350.0) internal successors, (6300), 18 states have internal predecessors, (6300), 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) [2022-11-20 10:38:39,853 INFO L175 Difference]: Start difference. First operand has 336 places, 322 transitions, 743 flow. Second operand 17 states and 4320 transitions. [2022-11-20 10:38:39,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 404 transitions, 1288 flow [2022-11-20 10:38:39,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 404 transitions, 1266 flow, removed 7 selfloop flow, removed 5 redundant places. [2022-11-20 10:38:39,863 INFO L231 Difference]: Finished difference. Result has 352 places, 335 transitions, 851 flow [2022-11-20 10:38:39,864 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=851, PETRI_PLACES=352, PETRI_TRANSITIONS=335} [2022-11-20 10:38:39,864 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 34 predicate places. [2022-11-20 10:38:39,865 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 335 transitions, 851 flow [2022-11-20 10:38:39,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 249.15384615384616) internal successors, (3239), 13 states have internal predecessors, (3239), 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) [2022-11-20 10:38:39,867 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:39,867 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:39,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 10:38:40,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:40,083 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)] === [2022-11-20 10:38:40,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:40,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1883228016, now seen corresponding path program 1 times [2022-11-20 10:38:40,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:40,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196703999] [2022-11-20 10:38:40,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:40,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:40,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:40,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:40,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196703999] [2022-11-20 10:38:40,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196703999] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:40,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712417562] [2022-11-20 10:38:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:40,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:40,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:40,600 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:40,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:38:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:40,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:38:40,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:41,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:41,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712417562] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:41,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:41,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-11-20 10:38:41,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297532361] [2022-11-20 10:38:41,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:41,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:38:41,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:41,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:38:41,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:38:41,928 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 350 [2022-11-20 10:38:41,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 335 transitions, 851 flow. Second operand has 11 states, 11 states have (on average 272.45454545454544) internal successors, (2997), 11 states have internal predecessors, (2997), 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) [2022-11-20 10:38:41,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:41,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 350 [2022-11-20 10:38:41,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:38:44,012 INFO L130 PetriNetUnfolder]: 1309/6750 cut-off events. [2022-11-20 10:38:44,012 INFO L131 PetriNetUnfolder]: For 493/493 co-relation queries the response was YES. [2022-11-20 10:38:44,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9334 conditions, 6750 events. 1309/6750 cut-off events. For 493/493 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 68221 event pairs, 498 based on Foata normal form. 0/5934 useless extension candidates. Maximal degree in co-relation 9315. Up to 446 conditions per place. [2022-11-20 10:38:44,077 INFO L137 encePairwiseOnDemand]: 332/350 looper letters, 137 selfloop transitions, 25 changer transitions 1/415 dead transitions. [2022-11-20 10:38:44,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 415 transitions, 1368 flow [2022-11-20 10:38:44,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 10:38:44,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 10:38:44,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4987 transitions. [2022-11-20 10:38:44,090 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7915873015873016 [2022-11-20 10:38:44,090 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4987 transitions. [2022-11-20 10:38:44,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4987 transitions. [2022-11-20 10:38:44,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:38:44,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4987 transitions. [2022-11-20 10:38:44,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 277.05555555555554) internal successors, (4987), 18 states have internal predecessors, (4987), 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) [2022-11-20 10:38:44,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 350.0) internal successors, (6650), 19 states have internal predecessors, (6650), 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) [2022-11-20 10:38:44,126 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 350.0) internal successors, (6650), 19 states have internal predecessors, (6650), 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) [2022-11-20 10:38:44,127 INFO L175 Difference]: Start difference. First operand has 352 places, 335 transitions, 851 flow. Second operand 18 states and 4987 transitions. [2022-11-20 10:38:44,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 415 transitions, 1368 flow [2022-11-20 10:38:44,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 415 transitions, 1351 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-11-20 10:38:44,151 INFO L231 Difference]: Finished difference. Result has 362 places, 341 transitions, 909 flow [2022-11-20 10:38:44,152 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=834, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=909, PETRI_PLACES=362, PETRI_TRANSITIONS=341} [2022-11-20 10:38:44,154 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 44 predicate places. [2022-11-20 10:38:44,154 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 341 transitions, 909 flow [2022-11-20 10:38:44,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 272.45454545454544) internal successors, (2997), 11 states have internal predecessors, (2997), 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) [2022-11-20 10:38:44,156 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:44,156 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:44,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:44,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:44,363 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)] === [2022-11-20 10:38:44,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:44,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2024823725, now seen corresponding path program 1 times [2022-11-20 10:38:44,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:44,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764333315] [2022-11-20 10:38:44,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:44,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:44,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:44,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764333315] [2022-11-20 10:38:44,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764333315] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:44,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034774085] [2022-11-20 10:38:44,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:44,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:44,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:44,815 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:44,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:38:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:45,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:38:45,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:45,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:45,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:45,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034774085] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:45,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:45,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14, 13] total 28 [2022-11-20 10:38:45,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396389973] [2022-11-20 10:38:45,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:45,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:38:45,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:45,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:38:45,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-11-20 10:38:45,924 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 350 [2022-11-20 10:38:45,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 341 transitions, 909 flow. Second operand has 13 states, 13 states have (on average 249.53846153846155) internal successors, (3244), 13 states have internal predecessors, (3244), 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) [2022-11-20 10:38:45,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:45,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 350 [2022-11-20 10:38:45,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:38:50,361 INFO L130 PetriNetUnfolder]: 1740/17144 cut-off events. [2022-11-20 10:38:50,361 INFO L131 PetriNetUnfolder]: For 1497/1513 co-relation queries the response was YES. [2022-11-20 10:38:50,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21591 conditions, 17144 events. 1740/17144 cut-off events. For 1497/1513 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 228278 event pairs, 822 based on Foata normal form. 12/15549 useless extension candidates. Maximal degree in co-relation 21572. Up to 865 conditions per place. [2022-11-20 10:38:50,562 INFO L137 encePairwiseOnDemand]: 325/350 looper letters, 170 selfloop transitions, 49 changer transitions 5/460 dead transitions. [2022-11-20 10:38:50,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 460 transitions, 1794 flow [2022-11-20 10:38:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 10:38:50,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-20 10:38:50,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 5783 transitions. [2022-11-20 10:38:50,577 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7183850931677018 [2022-11-20 10:38:50,577 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 5783 transitions. [2022-11-20 10:38:50,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 5783 transitions. [2022-11-20 10:38:50,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:38:50,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 5783 transitions. [2022-11-20 10:38:50,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 251.43478260869566) internal successors, (5783), 23 states have internal predecessors, (5783), 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) [2022-11-20 10:38:50,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 350.0) internal successors, (8400), 24 states have internal predecessors, (8400), 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) [2022-11-20 10:38:50,719 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 350.0) internal successors, (8400), 24 states have internal predecessors, (8400), 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) [2022-11-20 10:38:50,719 INFO L175 Difference]: Start difference. First operand has 362 places, 341 transitions, 909 flow. Second operand 23 states and 5783 transitions. [2022-11-20 10:38:50,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 460 transitions, 1794 flow [2022-11-20 10:38:50,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 460 transitions, 1741 flow, removed 4 selfloop flow, removed 9 redundant places. [2022-11-20 10:38:50,737 INFO L231 Difference]: Finished difference. Result has 383 places, 365 transitions, 1165 flow [2022-11-20 10:38:50,738 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1165, PETRI_PLACES=383, PETRI_TRANSITIONS=365} [2022-11-20 10:38:50,739 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 65 predicate places. [2022-11-20 10:38:50,739 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 365 transitions, 1165 flow [2022-11-20 10:38:50,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 249.53846153846155) internal successors, (3244), 13 states have internal predecessors, (3244), 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) [2022-11-20 10:38:50,740 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:50,740 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:50,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:50,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:50,948 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)] === [2022-11-20 10:38:50,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:50,948 INFO L85 PathProgramCache]: Analyzing trace with hash -176297371, now seen corresponding path program 1 times [2022-11-20 10:38:50,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:50,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540509780] [2022-11-20 10:38:50,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:50,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:51,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:51,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540509780] [2022-11-20 10:38:51,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540509780] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:51,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865762761] [2022-11-20 10:38:51,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:51,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:51,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:51,395 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:51,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:38:51,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:51,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:38:51,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:51,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:52,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:52,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865762761] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:52,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:52,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-11-20 10:38:52,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583056722] [2022-11-20 10:38:52,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:52,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:38:52,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:52,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:38:52,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:38:52,587 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 350 [2022-11-20 10:38:52,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 365 transitions, 1165 flow. Second operand has 11 states, 11 states have (on average 272.90909090909093) internal successors, (3002), 11 states have internal predecessors, (3002), 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) [2022-11-20 10:38:52,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:52,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 350 [2022-11-20 10:38:52,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:38:58,621 INFO L130 PetriNetUnfolder]: 3407/29586 cut-off events. [2022-11-20 10:38:58,622 INFO L131 PetriNetUnfolder]: For 2934/2948 co-relation queries the response was YES. [2022-11-20 10:38:58,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38347 conditions, 29586 events. 3407/29586 cut-off events. For 2934/2948 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 435972 event pairs, 1801 based on Foata normal form. 6/26989 useless extension candidates. Maximal degree in co-relation 38321. Up to 1110 conditions per place. [2022-11-20 10:38:58,905 INFO L137 encePairwiseOnDemand]: 332/350 looper letters, 180 selfloop transitions, 30 changer transitions 3/469 dead transitions. [2022-11-20 10:38:58,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 469 transitions, 1907 flow [2022-11-20 10:38:58,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 10:38:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-20 10:38:58,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 5273 transitions. [2022-11-20 10:38:58,915 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7929323308270677 [2022-11-20 10:38:58,916 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 5273 transitions. [2022-11-20 10:38:58,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 5273 transitions. [2022-11-20 10:38:58,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:38:58,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 5273 transitions. [2022-11-20 10:38:58,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 277.5263157894737) internal successors, (5273), 19 states have internal predecessors, (5273), 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) [2022-11-20 10:38:58,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 350.0) internal successors, (7000), 20 states have internal predecessors, (7000), 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) [2022-11-20 10:38:58,942 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 350.0) internal successors, (7000), 20 states have internal predecessors, (7000), 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) [2022-11-20 10:38:58,942 INFO L175 Difference]: Start difference. First operand has 383 places, 365 transitions, 1165 flow. Second operand 19 states and 5273 transitions. [2022-11-20 10:38:58,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 469 transitions, 1907 flow [2022-11-20 10:38:58,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 469 transitions, 1892 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-11-20 10:38:58,963 INFO L231 Difference]: Finished difference. Result has 396 places, 372 transitions, 1244 flow [2022-11-20 10:38:58,964 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1244, PETRI_PLACES=396, PETRI_TRANSITIONS=372} [2022-11-20 10:38:58,966 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 78 predicate places. [2022-11-20 10:38:58,967 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 372 transitions, 1244 flow [2022-11-20 10:38:58,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 272.90909090909093) internal successors, (3002), 11 states have internal predecessors, (3002), 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) [2022-11-20 10:38:58,968 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:58,968 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-11-20 10:38:58,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:59,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:59,182 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)] === [2022-11-20 10:38:59,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:59,182 INFO L85 PathProgramCache]: Analyzing trace with hash 133748198, now seen corresponding path program 1 times [2022-11-20 10:38:59,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:59,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909419133] [2022-11-20 10:38:59,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:59,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:59,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:59,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909419133] [2022-11-20 10:38:59,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909419133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:59,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:59,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 10:38:59,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012540417] [2022-11-20 10:38:59,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:59,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:38:59,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:59,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:38:59,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:38:59,397 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 350 [2022-11-20 10:38:59,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 372 transitions, 1244 flow. Second operand has 7 states, 7 states have (on average 278.85714285714283) internal successors, (1952), 7 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:59,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:59,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 350 [2022-11-20 10:38:59,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:39:01,032 INFO L130 PetriNetUnfolder]: 420/5273 cut-off events. [2022-11-20 10:39:01,033 INFO L131 PetriNetUnfolder]: For 1041/1266 co-relation queries the response was YES. [2022-11-20 10:39:01,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7368 conditions, 5273 events. 420/5273 cut-off events. For 1041/1266 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 52108 event pairs, 254 based on Foata normal form. 22/4941 useless extension candidates. Maximal degree in co-relation 7341. Up to 697 conditions per place. [2022-11-20 10:39:01,137 INFO L137 encePairwiseOnDemand]: 339/350 looper letters, 73 selfloop transitions, 8 changer transitions 55/395 dead transitions. [2022-11-20 10:39:01,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 395 transitions, 1571 flow [2022-11-20 10:39:01,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:39:01,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-20 10:39:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2834 transitions. [2022-11-20 10:39:01,147 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8097142857142857 [2022-11-20 10:39:01,147 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2834 transitions. [2022-11-20 10:39:01,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2834 transitions. [2022-11-20 10:39:01,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:39:01,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2834 transitions. [2022-11-20 10:39:01,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 283.4) internal successors, (2834), 10 states have internal predecessors, (2834), 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) [2022-11-20 10:39:01,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 350.0) internal successors, (3850), 11 states have internal predecessors, (3850), 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) [2022-11-20 10:39:01,164 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 350.0) internal successors, (3850), 11 states have internal predecessors, (3850), 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) [2022-11-20 10:39:01,164 INFO L175 Difference]: Start difference. First operand has 396 places, 372 transitions, 1244 flow. Second operand 10 states and 2834 transitions. [2022-11-20 10:39:01,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 395 transitions, 1571 flow [2022-11-20 10:39:01,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 395 transitions, 1528 flow, removed 3 selfloop flow, removed 11 redundant places. [2022-11-20 10:39:01,178 INFO L231 Difference]: Finished difference. Result has 393 places, 338 transitions, 1010 flow [2022-11-20 10:39:01,179 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=1188, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1010, PETRI_PLACES=393, PETRI_TRANSITIONS=338} [2022-11-20 10:39:01,180 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 75 predicate places. [2022-11-20 10:39:01,180 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 338 transitions, 1010 flow [2022-11-20 10:39:01,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 278.85714285714283) internal successors, (1952), 7 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:01,181 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:39:01,181 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:01,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 10:39:01,182 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)] === [2022-11-20 10:39:01,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:01,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2045442764, now seen corresponding path program 1 times [2022-11-20 10:39:01,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:01,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10792870] [2022-11-20 10:39:01,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:01,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:39:01,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:01,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10792870] [2022-11-20 10:39:01,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10792870] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:39:01,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736513817] [2022-11-20 10:39:01,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:01,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:01,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:01,639 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:01,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:39:01,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:01,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:39:01,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:39:02,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:02,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:39:02,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736513817] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:39:02,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:39:02,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-11-20 10:39:02,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034123076] [2022-11-20 10:39:02,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:39:02,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:39:02,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:02,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:39:02,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:39:02,696 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 350 [2022-11-20 10:39:02,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 338 transitions, 1010 flow. Second operand has 11 states, 11 states have (on average 273.0) internal successors, (3003), 11 states have internal predecessors, (3003), 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) [2022-11-20 10:39:02,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:39:02,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 350 [2022-11-20 10:39:02,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:39:06,202 INFO L130 PetriNetUnfolder]: 2358/18412 cut-off events. [2022-11-20 10:39:06,203 INFO L131 PetriNetUnfolder]: For 3400/3820 co-relation queries the response was YES. [2022-11-20 10:39:06,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25588 conditions, 18412 events. 2358/18412 cut-off events. For 3400/3820 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 243342 event pairs, 1208 based on Foata normal form. 67/17003 useless extension candidates. Maximal degree in co-relation 25561. Up to 950 conditions per place. [2022-11-20 10:39:06,349 INFO L137 encePairwiseOnDemand]: 333/350 looper letters, 146 selfloop transitions, 24 changer transitions 0/424 dead transitions. [2022-11-20 10:39:06,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 424 transitions, 1640 flow [2022-11-20 10:39:06,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 10:39:06,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-20 10:39:06,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 5246 transitions. [2022-11-20 10:39:06,356 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7888721804511278 [2022-11-20 10:39:06,356 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 5246 transitions. [2022-11-20 10:39:06,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 5246 transitions. [2022-11-20 10:39:06,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:39:06,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 5246 transitions. [2022-11-20 10:39:06,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 276.10526315789474) internal successors, (5246), 19 states have internal predecessors, (5246), 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) [2022-11-20 10:39:06,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 350.0) internal successors, (7000), 20 states have internal predecessors, (7000), 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) [2022-11-20 10:39:06,376 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 350.0) internal successors, (7000), 20 states have internal predecessors, (7000), 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) [2022-11-20 10:39:06,376 INFO L175 Difference]: Start difference. First operand has 393 places, 338 transitions, 1010 flow. Second operand 19 states and 5246 transitions. [2022-11-20 10:39:06,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 424 transitions, 1640 flow [2022-11-20 10:39:06,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 424 transitions, 1533 flow, removed 5 selfloop flow, removed 27 redundant places. [2022-11-20 10:39:06,394 INFO L231 Difference]: Finished difference. Result has 372 places, 344 transitions, 986 flow [2022-11-20 10:39:06,395 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=913, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=986, PETRI_PLACES=372, PETRI_TRANSITIONS=344} [2022-11-20 10:39:06,395 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 54 predicate places. [2022-11-20 10:39:06,395 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 344 transitions, 986 flow [2022-11-20 10:39:06,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 273.0) internal successors, (3003), 11 states have internal predecessors, (3003), 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) [2022-11-20 10:39:06,397 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:39:06,397 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:06,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:06,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 10:39:06,604 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)] === [2022-11-20 10:39:06,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:06,604 INFO L85 PathProgramCache]: Analyzing trace with hash -779823882, now seen corresponding path program 1 times [2022-11-20 10:39:06,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:06,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552098439] [2022-11-20 10:39:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:06,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:39:06,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:06,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552098439] [2022-11-20 10:39:06,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552098439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:39:06,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:39:06,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 10:39:06,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901190590] [2022-11-20 10:39:06,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:39:06,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:39:06,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:06,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:39:06,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:39:06,822 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 350 [2022-11-20 10:39:06,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 344 transitions, 986 flow. Second operand has 7 states, 7 states have (on average 279.42857142857144) internal successors, (1956), 7 states have internal predecessors, (1956), 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) [2022-11-20 10:39:06,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:39:06,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 350 [2022-11-20 10:39:06,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:39:07,982 INFO L130 PetriNetUnfolder]: 668/4273 cut-off events. [2022-11-20 10:39:07,982 INFO L131 PetriNetUnfolder]: For 1236/1259 co-relation queries the response was YES. [2022-11-20 10:39:08,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6572 conditions, 4273 events. 668/4273 cut-off events. For 1236/1259 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 39183 event pairs, 456 based on Foata normal form. 35/3897 useless extension candidates. Maximal degree in co-relation 6554. Up to 902 conditions per place. [2022-11-20 10:39:08,015 INFO L137 encePairwiseOnDemand]: 341/350 looper letters, 68 selfloop transitions, 10 changer transitions 24/362 dead transitions. [2022-11-20 10:39:08,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 362 transitions, 1252 flow [2022-11-20 10:39:08,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:39:08,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 10:39:08,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2264 transitions. [2022-11-20 10:39:08,020 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8085714285714286 [2022-11-20 10:39:08,020 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2264 transitions. [2022-11-20 10:39:08,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2264 transitions. [2022-11-20 10:39:08,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:39:08,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2264 transitions. [2022-11-20 10:39:08,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 283.0) internal successors, (2264), 8 states have internal predecessors, (2264), 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) [2022-11-20 10:39:08,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 350.0) internal successors, (3150), 9 states have internal predecessors, (3150), 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) [2022-11-20 10:39:08,032 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 350.0) internal successors, (3150), 9 states have internal predecessors, (3150), 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) [2022-11-20 10:39:08,032 INFO L175 Difference]: Start difference. First operand has 372 places, 344 transitions, 986 flow. Second operand 8 states and 2264 transitions. [2022-11-20 10:39:08,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 362 transitions, 1252 flow [2022-11-20 10:39:08,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 362 transitions, 1209 flow, removed 3 selfloop flow, removed 14 redundant places. [2022-11-20 10:39:08,044 INFO L231 Difference]: Finished difference. Result has 365 places, 336 transitions, 931 flow [2022-11-20 10:39:08,045 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=931, PETRI_PLACES=365, PETRI_TRANSITIONS=336} [2022-11-20 10:39:08,046 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 47 predicate places. [2022-11-20 10:39:08,046 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 336 transitions, 931 flow [2022-11-20 10:39:08,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 279.42857142857144) internal successors, (1956), 7 states have internal predecessors, (1956), 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) [2022-11-20 10:39:08,047 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:39:08,047 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:08,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 10:39:08,048 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)] === [2022-11-20 10:39:08,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:08,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1274664819, now seen corresponding path program 1 times [2022-11-20 10:39:08,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:08,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365749350] [2022-11-20 10:39:08,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:08,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:39:08,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:08,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365749350] [2022-11-20 10:39:08,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365749350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:39:08,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478098905] [2022-11-20 10:39:08,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:08,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:08,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:08,695 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:08,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:39:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:08,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:39:08,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:39:09,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:39:10,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478098905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:10,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:39:10,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 31 [2022-11-20 10:39:10,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536455343] [2022-11-20 10:39:10,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:10,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 10:39:10,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:10,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 10:39:10,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2022-11-20 10:39:10,115 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 350 [2022-11-20 10:39:10,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 336 transitions, 931 flow. Second operand has 31 states, 31 states have (on average 246.32258064516128) internal successors, (7636), 31 states have internal predecessors, (7636), 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) [2022-11-20 10:39:10,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:39:10,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 350 [2022-11-20 10:39:10,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:39:13,481 INFO L130 PetriNetUnfolder]: 1378/10798 cut-off events. [2022-11-20 10:39:13,481 INFO L131 PetriNetUnfolder]: For 2714/3006 co-relation queries the response was YES. [2022-11-20 10:39:13,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15806 conditions, 10798 events. 1378/10798 cut-off events. For 2714/3006 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 127242 event pairs, 312 based on Foata normal form. 156/10265 useless extension candidates. Maximal degree in co-relation 15789. Up to 809 conditions per place. [2022-11-20 10:39:13,553 INFO L137 encePairwiseOnDemand]: 317/350 looper letters, 230 selfloop transitions, 68 changer transitions 15/546 dead transitions. [2022-11-20 10:39:13,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 546 transitions, 2373 flow [2022-11-20 10:39:13,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-20 10:39:13,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-20 10:39:13,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 11846 transitions. [2022-11-20 10:39:13,566 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7051190476190476 [2022-11-20 10:39:13,567 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 11846 transitions. [2022-11-20 10:39:13,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 11846 transitions. [2022-11-20 10:39:13,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:39:13,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 11846 transitions. [2022-11-20 10:39:13,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 246.79166666666666) internal successors, (11846), 48 states have internal predecessors, (11846), 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) [2022-11-20 10:39:13,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 350.0) internal successors, (17150), 49 states have internal predecessors, (17150), 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) [2022-11-20 10:39:13,608 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 350.0) internal successors, (17150), 49 states have internal predecessors, (17150), 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) [2022-11-20 10:39:13,609 INFO L175 Difference]: Start difference. First operand has 365 places, 336 transitions, 931 flow. Second operand 48 states and 11846 transitions. [2022-11-20 10:39:13,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 546 transitions, 2373 flow [2022-11-20 10:39:13,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 546 transitions, 2275 flow, removed 18 selfloop flow, removed 8 redundant places. [2022-11-20 10:39:13,623 INFO L231 Difference]: Finished difference. Result has 418 places, 381 transitions, 1384 flow [2022-11-20 10:39:13,624 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=1384, PETRI_PLACES=418, PETRI_TRANSITIONS=381} [2022-11-20 10:39:13,624 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 100 predicate places. [2022-11-20 10:39:13,624 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 381 transitions, 1384 flow [2022-11-20 10:39:13,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 246.32258064516128) internal successors, (7636), 31 states have internal predecessors, (7636), 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) [2022-11-20 10:39:13,627 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:39:13,627 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:13,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:13,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 10:39:13,833 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)] === [2022-11-20 10:39:13,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:13,834 INFO L85 PathProgramCache]: Analyzing trace with hash 941122581, now seen corresponding path program 2 times [2022-11-20 10:39:13,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:13,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423572932] [2022-11-20 10:39:13,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:13,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:39:14,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:14,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423572932] [2022-11-20 10:39:14,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423572932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:39:14,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10609081] [2022-11-20 10:39:14,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:39:14,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:14,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:14,478 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:14,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:39:14,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:39:14,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:14,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:39:14,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 10:39:14,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:39:14,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10609081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:39:14,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:39:14,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [17] total 20 [2022-11-20 10:39:14,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618914758] [2022-11-20 10:39:14,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:39:14,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:39:14,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:14,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:39:14,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:39:14,827 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 350 [2022-11-20 10:39:14,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 381 transitions, 1384 flow. Second operand has 7 states, 7 states have (on average 272.85714285714283) internal successors, (1910), 7 states have internal predecessors, (1910), 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) [2022-11-20 10:39:14,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:39:14,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 350 [2022-11-20 10:39:14,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:39:19,904 INFO L130 PetriNetUnfolder]: 3429/24956 cut-off events. [2022-11-20 10:39:19,905 INFO L131 PetriNetUnfolder]: For 6477/6644 co-relation queries the response was YES. [2022-11-20 10:39:20,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36366 conditions, 24956 events. 3429/24956 cut-off events. For 6477/6644 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 336321 event pairs, 700 based on Foata normal form. 168/22950 useless extension candidates. Maximal degree in co-relation 36332. Up to 1946 conditions per place. [2022-11-20 10:39:20,155 INFO L137 encePairwiseOnDemand]: 341/350 looper letters, 129 selfloop transitions, 16 changer transitions 4/456 dead transitions. [2022-11-20 10:39:20,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 456 transitions, 2022 flow [2022-11-20 10:39:20,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:39:20,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:39:20,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1961 transitions. [2022-11-20 10:39:20,158 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8004081632653062 [2022-11-20 10:39:20,159 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1961 transitions. [2022-11-20 10:39:20,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1961 transitions. [2022-11-20 10:39:20,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:39:20,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1961 transitions. [2022-11-20 10:39:20,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 280.14285714285717) internal successors, (1961), 7 states have internal predecessors, (1961), 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) [2022-11-20 10:39:20,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 350.0) internal successors, (2800), 8 states have internal predecessors, (2800), 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) [2022-11-20 10:39:20,165 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 350.0) internal successors, (2800), 8 states have internal predecessors, (2800), 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) [2022-11-20 10:39:20,165 INFO L175 Difference]: Start difference. First operand has 418 places, 381 transitions, 1384 flow. Second operand 7 states and 1961 transitions. [2022-11-20 10:39:20,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 456 transitions, 2022 flow [2022-11-20 10:39:20,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 456 transitions, 1969 flow, removed 23 selfloop flow, removed 8 redundant places. [2022-11-20 10:39:20,185 INFO L231 Difference]: Finished difference. Result has 417 places, 395 transitions, 1503 flow [2022-11-20 10:39:20,185 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1503, PETRI_PLACES=417, PETRI_TRANSITIONS=395} [2022-11-20 10:39:20,186 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 99 predicate places. [2022-11-20 10:39:20,186 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 395 transitions, 1503 flow [2022-11-20 10:39:20,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 272.85714285714283) internal successors, (1910), 7 states have internal predecessors, (1910), 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) [2022-11-20 10:39:20,187 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:39:20,187 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:20,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:20,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:20,394 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)] === [2022-11-20 10:39:20,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:20,394 INFO L85 PathProgramCache]: Analyzing trace with hash -934780955, now seen corresponding path program 3 times [2022-11-20 10:39:20,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:20,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019578148] [2022-11-20 10:39:20,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:20,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:39:21,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:21,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019578148] [2022-11-20 10:39:21,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019578148] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:39:21,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774624229] [2022-11-20 10:39:21,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:39:21,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:21,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:21,073 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:21,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:39:21,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:39:21,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:21,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:39:21,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 10:39:21,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:39:21,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774624229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:39:21,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:39:21,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [17] total 20 [2022-11-20 10:39:21,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926083969] [2022-11-20 10:39:21,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:39:21,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:39:21,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:21,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:39:21,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:39:21,406 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 350 [2022-11-20 10:39:21,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 395 transitions, 1503 flow. Second operand has 7 states, 7 states have (on average 272.85714285714283) internal successors, (1910), 7 states have internal predecessors, (1910), 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) [2022-11-20 10:39:21,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:39:21,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 350 [2022-11-20 10:39:21,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:39:27,431 INFO L130 PetriNetUnfolder]: 4267/30854 cut-off events. [2022-11-20 10:39:27,431 INFO L131 PetriNetUnfolder]: For 13866/14876 co-relation queries the response was YES. [2022-11-20 10:39:27,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47953 conditions, 30854 events. 4267/30854 cut-off events. For 13866/14876 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 440713 event pairs, 970 based on Foata normal form. 372/28590 useless extension candidates. Maximal degree in co-relation 47919. Up to 2717 conditions per place. [2022-11-20 10:39:27,759 INFO L137 encePairwiseOnDemand]: 341/350 looper letters, 129 selfloop transitions, 30 changer transitions 4/470 dead transitions. [2022-11-20 10:39:27,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 470 transitions, 2215 flow [2022-11-20 10:39:27,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:39:27,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:39:27,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1964 transitions. [2022-11-20 10:39:27,762 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8016326530612244 [2022-11-20 10:39:27,762 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1964 transitions. [2022-11-20 10:39:27,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1964 transitions. [2022-11-20 10:39:27,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:39:27,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1964 transitions. [2022-11-20 10:39:27,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 280.57142857142856) internal successors, (1964), 7 states have internal predecessors, (1964), 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) [2022-11-20 10:39:27,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 350.0) internal successors, (2800), 8 states have internal predecessors, (2800), 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) [2022-11-20 10:39:27,768 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 350.0) internal successors, (2800), 8 states have internal predecessors, (2800), 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) [2022-11-20 10:39:27,768 INFO L175 Difference]: Start difference. First operand has 417 places, 395 transitions, 1503 flow. Second operand 7 states and 1964 transitions. [2022-11-20 10:39:27,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 470 transitions, 2215 flow [2022-11-20 10:39:27,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 470 transitions, 2192 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-11-20 10:39:27,791 INFO L231 Difference]: Finished difference. Result has 423 places, 413 transitions, 1758 flow [2022-11-20 10:39:27,792 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1758, PETRI_PLACES=423, PETRI_TRANSITIONS=413} [2022-11-20 10:39:27,793 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 105 predicate places. [2022-11-20 10:39:27,793 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 413 transitions, 1758 flow [2022-11-20 10:39:27,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 272.85714285714283) internal successors, (1910), 7 states have internal predecessors, (1910), 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) [2022-11-20 10:39:27,793 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:39:27,794 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:27,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:27,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:28,000 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)] === [2022-11-20 10:39:28,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:28,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1685075819, now seen corresponding path program 4 times [2022-11-20 10:39:28,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:28,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014656779] [2022-11-20 10:39:28,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:28,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:28,836 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:39:28,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:28,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014656779] [2022-11-20 10:39:28,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014656779] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:39:28,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843055482] [2022-11-20 10:39:28,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:39:28,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:28,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:28,838 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:28,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:39:29,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:39:29,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:29,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:39:29,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:29,652 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:39:29,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:39:30,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843055482] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:30,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:39:30,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 36 [2022-11-20 10:39:30,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280637467] [2022-11-20 10:39:30,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:30,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 10:39:30,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:30,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 10:39:30,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 10:39:30,378 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 350 [2022-11-20 10:39:30,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 413 transitions, 1758 flow. Second operand has 36 states, 36 states have (on average 245.30555555555554) internal successors, (8831), 36 states have internal predecessors, (8831), 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) [2022-11-20 10:39:30,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:39:30,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 350 [2022-11-20 10:39:30,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:39:40,385 INFO L130 PetriNetUnfolder]: 5244/43034 cut-off events. [2022-11-20 10:39:40,385 INFO L131 PetriNetUnfolder]: For 23134/23878 co-relation queries the response was YES. [2022-11-20 10:39:40,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66017 conditions, 43034 events. 5244/43034 cut-off events. For 23134/23878 co-relation queries the response was YES. Maximal size of possible extension queue 859. Compared 654257 event pairs, 2664 based on Foata normal form. 315/39761 useless extension candidates. Maximal degree in co-relation 65980. Up to 3197 conditions per place. [2022-11-20 10:39:40,915 INFO L137 encePairwiseOnDemand]: 324/350 looper letters, 207 selfloop transitions, 74 changer transitions 4/539 dead transitions. [2022-11-20 10:39:40,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 539 transitions, 2986 flow [2022-11-20 10:39:40,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 10:39:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-20 10:39:40,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 8143 transitions. [2022-11-20 10:39:40,924 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.705021645021645 [2022-11-20 10:39:40,924 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 8143 transitions. [2022-11-20 10:39:40,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 8143 transitions. [2022-11-20 10:39:40,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:39:40,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 8143 transitions. [2022-11-20 10:39:40,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 246.75757575757575) internal successors, (8143), 33 states have internal predecessors, (8143), 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) [2022-11-20 10:39:40,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 350.0) internal successors, (11900), 34 states have internal predecessors, (11900), 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) [2022-11-20 10:39:40,950 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 350.0) internal successors, (11900), 34 states have internal predecessors, (11900), 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) [2022-11-20 10:39:40,950 INFO L175 Difference]: Start difference. First operand has 423 places, 413 transitions, 1758 flow. Second operand 33 states and 8143 transitions. [2022-11-20 10:39:40,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 539 transitions, 2986 flow [2022-11-20 10:39:41,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 539 transitions, 2937 flow, removed 14 selfloop flow, removed 3 redundant places. [2022-11-20 10:39:41,029 INFO L231 Difference]: Finished difference. Result has 458 places, 430 transitions, 2061 flow [2022-11-20 10:39:41,030 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2061, PETRI_PLACES=458, PETRI_TRANSITIONS=430} [2022-11-20 10:39:41,030 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 140 predicate places. [2022-11-20 10:39:41,030 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 430 transitions, 2061 flow [2022-11-20 10:39:41,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 245.30555555555554) internal successors, (8831), 36 states have internal predecessors, (8831), 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) [2022-11-20 10:39:41,032 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:39:41,032 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:41,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:41,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd756801-2a36-4cf6-a253-3434dcecdd3c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:41,244 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)] === [2022-11-20 10:39:41,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:41,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1875192190, now seen corresponding path program 1 times [2022-11-20 10:39:41,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:41,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684634798] [2022-11-20 10:39:41,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:41,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:39:41,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:41,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684634798] [2022-11-20 10:39:41,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684634798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:39:41,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:39:41,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 10:39:41,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172552208] [2022-11-20 10:39:41,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:39:41,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:39:41,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:41,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:39:41,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:39:41,451 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 350 [2022-11-20 10:39:41,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 430 transitions, 2061 flow. Second operand has 7 states, 7 states have (on average 280.0) internal successors, (1960), 7 states have internal predecessors, (1960), 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) [2022-11-20 10:39:41,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:39:41,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 350 [2022-11-20 10:39:41,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand