./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 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/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_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8 --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-2329fc7 [2022-12-13 20:54:22,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 20:54:22,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 20:54:22,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 20:54:22,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 20:54:22,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 20:54:22,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 20:54:22,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 20:54:22,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 20:54:22,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 20:54:22,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 20:54:22,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 20:54:22,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 20:54:22,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 20:54:22,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 20:54:22,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 20:54:22,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 20:54:22,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 20:54:22,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 20:54:22,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 20:54:22,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 20:54:22,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 20:54:22,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 20:54:22,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 20:54:22,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 20:54:22,162 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 20:54:22,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 20:54:22,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 20:54:22,163 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 20:54:22,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 20:54:22,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 20:54:22,165 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 20:54:22,166 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 20:54:22,167 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 20:54:22,168 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 20:54:22,168 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 20:54:22,169 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 20:54:22,169 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 20:54:22,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 20:54:22,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 20:54:22,171 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 20:54:22,171 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 20:54:22,201 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 20:54:22,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 20:54:22,202 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 20:54:22,202 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 20:54:22,203 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 20:54:22,203 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 20:54:22,204 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 20:54:22,204 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 20:54:22,204 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 20:54:22,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 20:54:22,204 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 20:54:22,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 20:54:22,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 20:54:22,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 20:54:22,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 20:54:22,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 20:54:22,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 20:54:22,205 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 20:54:22,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 20:54:22,206 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 20:54:22,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 20:54:22,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 20:54:22,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 20:54:22,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 20:54:22,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:54:22,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 20:54:22,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 20:54:22,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 20:54:22,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 20:54:22,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 20:54:22,207 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 20:54:22,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 20:54:22,208 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 20:54:22,208 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 20:54:22,208 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 20:54:22,208 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 [2022-12-13 20:54:22,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 20:54:22,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 20:54:22,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 20:54:22,407 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 20:54:22,408 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 20:54:22,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2022-12-13 20:54:25,034 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 20:54:25,179 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 20:54:25,180 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2022-12-13 20:54:25,186 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/data/a17098755/a754522106a744a4a5c15475a78fd794/FLAGf7590e560 [2022-12-13 20:54:25,197 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/data/a17098755/a754522106a744a4a5c15475a78fd794 [2022-12-13 20:54:25,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 20:54:25,200 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 20:54:25,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 20:54:25,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 20:54:25,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 20:54:25,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:54:25" (1/1) ... [2022-12-13 20:54:25,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4369f021 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:54:25, skipping insertion in model container [2022-12-13 20:54:25,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:54:25" (1/1) ... [2022-12-13 20:54:25,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 20:54:25,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:54:25,347 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_802e121c-90f8-486d-9b75-602d69130306/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c[2728,2741] [2022-12-13 20:54:25,354 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:54:25,362 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 20:54:25,379 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_802e121c-90f8-486d-9b75-602d69130306/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c[2728,2741] [2022-12-13 20:54:25,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:54:25,393 INFO L208 MainTranslator]: Completed translation [2022-12-13 20:54:25,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:54:25 WrapperNode [2022-12-13 20:54:25,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 20:54:25,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 20:54:25,394 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 20:54:25,394 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 20:54:25,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:54:25" (1/1) ... [2022-12-13 20:54:25,406 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:54:25" (1/1) ... [2022-12-13 20:54:25,425 INFO L138 Inliner]: procedures = 26, calls = 49, calls flagged for inlining = 13, calls inlined = 21, statements flattened = 277 [2022-12-13 20:54:25,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 20:54:25,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 20:54:25,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 20:54:25,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 20:54:25,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:54:25" (1/1) ... [2022-12-13 20:54:25,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:54:25" (1/1) ... [2022-12-13 20:54:25,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:54:25" (1/1) ... [2022-12-13 20:54:25,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:54:25" (1/1) ... [2022-12-13 20:54:25,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:54:25" (1/1) ... [2022-12-13 20:54:25,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:54:25" (1/1) ... [2022-12-13 20:54:25,447 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:54:25" (1/1) ... [2022-12-13 20:54:25,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:54:25" (1/1) ... [2022-12-13 20:54:25,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 20:54:25,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 20:54:25,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 20:54:25,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 20:54:25,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:54:25" (1/1) ... [2022-12-13 20:54:25,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:54:25,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:54:25,474 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 20:54:25,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 20:54:25,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 20:54:25,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 20:54:25,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 20:54:25,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 20:54:25,506 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 20:54:25,506 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 20:54:25,506 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 20:54:25,506 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 20:54:25,506 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 20:54:25,506 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 20:54:25,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 20:54:25,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 20:54:25,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 20:54:25,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 20:54:25,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 20:54:25,508 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 20:54:25,597 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 20:54:25,598 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 20:54:25,954 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 20:54:25,965 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 20:54:25,965 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 20:54:25,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:54:25 BoogieIcfgContainer [2022-12-13 20:54:25,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 20:54:25,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 20:54:25,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 20:54:25,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 20:54:25,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 08:54:25" (1/3) ... [2022-12-13 20:54:25,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dea37f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:54:25, skipping insertion in model container [2022-12-13 20:54:25,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:54:25" (2/3) ... [2022-12-13 20:54:25,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dea37f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:54:25, skipping insertion in model container [2022-12-13 20:54:25,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:54:25" (3/3) ... [2022-12-13 20:54:25,977 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2022-12-13 20:54:25,986 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 20:54:25,994 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 20:54:25,995 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 20:54:25,995 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 20:54:26,094 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 20:54:26,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 350 transitions, 724 flow [2022-12-13 20:54:26,260 INFO L130 PetriNetUnfolder]: 28/347 cut-off events. [2022-12-13 20:54:26,260 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 20:54:26,268 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. [2022-12-13 20:54:26,268 INFO L82 GeneralOperation]: Start removeDead. Operand has 332 places, 350 transitions, 724 flow [2022-12-13 20:54:26,275 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 318 places, 336 transitions, 690 flow [2022-12-13 20:54:26,279 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 20:54:26,287 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 318 places, 336 transitions, 690 flow [2022-12-13 20:54:26,289 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 318 places, 336 transitions, 690 flow [2022-12-13 20:54:26,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 318 places, 336 transitions, 690 flow [2022-12-13 20:54:26,358 INFO L130 PetriNetUnfolder]: 28/336 cut-off events. [2022-12-13 20:54:26,358 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 20:54:26,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 336 events. 28/336 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 576 event pairs, 0 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 269. Up to 3 conditions per place. [2022-12-13 20:54:26,369 INFO L119 LiptonReduction]: Number of co-enabled transitions 18600 [2022-12-13 20:54:32,870 INFO L134 LiptonReduction]: Checked pairs total: 19930 [2022-12-13 20:54:32,870 INFO L136 LiptonReduction]: Total number of compositions: 373 [2022-12-13 20:54:32,884 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:54:32,891 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;@144c139a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:54:32,891 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 20:54:32,899 INFO L130 PetriNetUnfolder]: 8/35 cut-off events. [2022-12-13 20:54:32,899 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 20:54:32,899 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:54:32,900 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:54:32,900 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)] === [2022-12-13 20:54:32,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:54:32,905 INFO L85 PathProgramCache]: Analyzing trace with hash 475764104, now seen corresponding path program 1 times [2022-12-13 20:54:32,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:54:32,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432123724] [2022-12-13 20:54:32,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:54:32,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:54:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:54:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:54:33,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:54:33,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432123724] [2022-12-13 20:54:33,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432123724] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:54:33,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:54:33,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:54:33,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559849931] [2022-12-13 20:54:33,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:54:33,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:54:33,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:54:33,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:54:33,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:54:33,704 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 723 [2022-12-13 20:54:33,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 90 flow. Second operand has 6 states, 6 states have (on average 308.6666666666667) internal successors, (1852), 6 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:33,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:54:33,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 723 [2022-12-13 20:54:33,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:54:34,278 INFO L130 PetriNetUnfolder]: 2813/3976 cut-off events. [2022-12-13 20:54:34,279 INFO L131 PetriNetUnfolder]: For 271/271 co-relation queries the response was YES. [2022-12-13 20:54:34,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8319 conditions, 3976 events. 2813/3976 cut-off events. For 271/271 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 17241 event pairs, 1231 based on Foata normal form. 2/3026 useless extension candidates. Maximal degree in co-relation 2528. Up to 1171 conditions per place. [2022-12-13 20:54:34,295 INFO L137 encePairwiseOnDemand]: 715/723 looper letters, 135 selfloop transitions, 8 changer transitions 8/151 dead transitions. [2022-12-13 20:54:34,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 151 transitions, 688 flow [2022-12-13 20:54:34,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 20:54:34,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 20:54:34,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2593 transitions. [2022-12-13 20:54:34,319 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4483056708160443 [2022-12-13 20:54:34,320 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2593 transitions. [2022-12-13 20:54:34,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2593 transitions. [2022-12-13 20:54:34,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:54:34,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2593 transitions. [2022-12-13 20:54:34,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 324.125) internal successors, (2593), 8 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:34,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 723.0) internal successors, (6507), 9 states have internal predecessors, (6507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:34,355 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 723.0) internal successors, (6507), 9 states have internal predecessors, (6507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:34,357 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 90 flow. Second operand 8 states and 2593 transitions. [2022-12-13 20:54:34,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 151 transitions, 688 flow [2022-12-13 20:54:34,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 151 transitions, 632 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 20:54:34,371 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 132 flow [2022-12-13 20:54:34,373 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=132, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2022-12-13 20:54:34,377 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2022-12-13 20:54:34,377 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 132 flow [2022-12-13 20:54:34,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 308.6666666666667) internal successors, (1852), 6 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:34,379 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:54:34,379 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:54:34,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 20:54:34,379 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)] === [2022-12-13 20:54:34,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:54:34,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1330719814, now seen corresponding path program 1 times [2022-12-13 20:54:34,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:54:34,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857281280] [2022-12-13 20:54:34,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:54:34,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:54:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:54:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:54:34,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:54:34,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857281280] [2022-12-13 20:54:34,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857281280] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:54:34,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565603731] [2022-12-13 20:54:34,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:54:34,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:54:34,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:54:34,618 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:54:34,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 20:54:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:54:34,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 20:54:34,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:54:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:54:34,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:54:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:54:34,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565603731] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 20:54:34,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:54:34,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 11 [2022-12-13 20:54:34,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441850939] [2022-12-13 20:54:34,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:54:34,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:54:34,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:54:34,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:54:34,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-12-13 20:54:35,047 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 723 [2022-12-13 20:54:35,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 132 flow. Second operand has 6 states, 6 states have (on average 302.8333333333333) internal successors, (1817), 6 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:35,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:54:35,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 723 [2022-12-13 20:54:35,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:54:35,843 INFO L130 PetriNetUnfolder]: 4818/6830 cut-off events. [2022-12-13 20:54:35,843 INFO L131 PetriNetUnfolder]: For 517/517 co-relation queries the response was YES. [2022-12-13 20:54:35,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14793 conditions, 6830 events. 4818/6830 cut-off events. For 517/517 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 34037 event pairs, 800 based on Foata normal form. 1/5209 useless extension candidates. Maximal degree in co-relation 11804. Up to 3566 conditions per place. [2022-12-13 20:54:35,862 INFO L137 encePairwiseOnDemand]: 713/723 looper letters, 144 selfloop transitions, 11 changer transitions 8/163 dead transitions. [2022-12-13 20:54:35,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 163 transitions, 784 flow [2022-12-13 20:54:35,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 20:54:35,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 20:54:35,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3145 transitions. [2022-12-13 20:54:35,867 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43499308437067774 [2022-12-13 20:54:35,867 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3145 transitions. [2022-12-13 20:54:35,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3145 transitions. [2022-12-13 20:54:35,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:54:35,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3145 transitions. [2022-12-13 20:54:35,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 314.5) internal successors, (3145), 10 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:35,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 723.0) internal successors, (7953), 11 states have internal predecessors, (7953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:35,882 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 723.0) internal successors, (7953), 11 states have internal predecessors, (7953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:35,882 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 132 flow. Second operand 10 states and 3145 transitions. [2022-12-13 20:54:35,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 163 transitions, 784 flow [2022-12-13 20:54:35,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 163 transitions, 780 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-12-13 20:54:35,885 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 217 flow [2022-12-13 20:54:35,885 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=217, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2022-12-13 20:54:35,886 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 17 predicate places. [2022-12-13 20:54:35,886 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 217 flow [2022-12-13 20:54:35,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 302.8333333333333) internal successors, (1817), 6 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:35,887 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:54:35,887 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:54:35,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 20:54:36,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:54:36,088 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)] === [2022-12-13 20:54:36,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:54:36,089 INFO L85 PathProgramCache]: Analyzing trace with hash 642292755, now seen corresponding path program 1 times [2022-12-13 20:54:36,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:54:36,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369340524] [2022-12-13 20:54:36,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:54:36,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:54:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:54:36,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:54:36,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:54:36,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369340524] [2022-12-13 20:54:36,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369340524] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:54:36,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545188068] [2022-12-13 20:54:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:54:36,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:54:36,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:54:36,350 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:54:36,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 20:54:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:54:36,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 20:54:36,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:54:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:54:36,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:54:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:54:36,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545188068] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 20:54:36,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:54:36,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2022-12-13 20:54:36,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316728725] [2022-12-13 20:54:36,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:54:36,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:54:36,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:54:36,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:54:36,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-12-13 20:54:36,804 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 723 [2022-12-13 20:54:36,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 217 flow. Second operand has 7 states, 7 states have (on average 301.42857142857144) internal successors, (2110), 7 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:36,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:54:36,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 723 [2022-12-13 20:54:36,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:54:37,980 INFO L130 PetriNetUnfolder]: 6757/9780 cut-off events. [2022-12-13 20:54:37,980 INFO L131 PetriNetUnfolder]: For 1137/1137 co-relation queries the response was YES. [2022-12-13 20:54:37,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22005 conditions, 9780 events. 6757/9780 cut-off events. For 1137/1137 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 52280 event pairs, 2010 based on Foata normal form. 0/7510 useless extension candidates. Maximal degree in co-relation 14679. Up to 2674 conditions per place. [2022-12-13 20:54:38,019 INFO L137 encePairwiseOnDemand]: 713/723 looper letters, 166 selfloop transitions, 17 changer transitions 2/185 dead transitions. [2022-12-13 20:54:38,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 185 transitions, 969 flow [2022-12-13 20:54:38,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 20:54:38,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 20:54:38,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3149 transitions. [2022-12-13 20:54:38,024 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4355463347164592 [2022-12-13 20:54:38,024 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3149 transitions. [2022-12-13 20:54:38,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3149 transitions. [2022-12-13 20:54:38,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:54:38,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3149 transitions. [2022-12-13 20:54:38,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 314.9) internal successors, (3149), 10 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:38,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 723.0) internal successors, (7953), 11 states have internal predecessors, (7953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:38,037 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 723.0) internal successors, (7953), 11 states have internal predecessors, (7953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:38,037 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 217 flow. Second operand 10 states and 3149 transitions. [2022-12-13 20:54:38,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 185 transitions, 969 flow [2022-12-13 20:54:38,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 185 transitions, 968 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:54:38,040 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 287 flow [2022-12-13 20:54:38,041 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=287, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2022-12-13 20:54:38,041 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 27 predicate places. [2022-12-13 20:54:38,041 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 287 flow [2022-12-13 20:54:38,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 301.42857142857144) internal successors, (2110), 7 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:38,042 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:54:38,042 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:54:38,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 20:54:38,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:54:38,244 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)] === [2022-12-13 20:54:38,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:54:38,245 INFO L85 PathProgramCache]: Analyzing trace with hash -721368428, now seen corresponding path program 1 times [2022-12-13 20:54:38,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:54:38,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926350725] [2022-12-13 20:54:38,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:54:38,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:54:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:54:38,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:54:38,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:54:38,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926350725] [2022-12-13 20:54:38,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926350725] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:54:38,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:54:38,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:54:38,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682624102] [2022-12-13 20:54:38,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:54:38,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:54:38,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:54:38,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:54:38,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:54:38,487 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 723 [2022-12-13 20:54:38,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 287 flow. Second operand has 5 states, 5 states have (on average 312.0) internal successors, (1560), 5 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:38,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:54:38,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 723 [2022-12-13 20:54:38,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:54:39,064 INFO L130 PetriNetUnfolder]: 3925/5796 cut-off events. [2022-12-13 20:54:39,065 INFO L131 PetriNetUnfolder]: For 2110/2110 co-relation queries the response was YES. [2022-12-13 20:54:39,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14023 conditions, 5796 events. 3925/5796 cut-off events. For 2110/2110 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 29198 event pairs, 1878 based on Foata normal form. 0/5038 useless extension candidates. Maximal degree in co-relation 10816. Up to 3137 conditions per place. [2022-12-13 20:54:39,078 INFO L137 encePairwiseOnDemand]: 717/723 looper letters, 42 selfloop transitions, 4 changer transitions 95/141 dead transitions. [2022-12-13 20:54:39,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 141 transitions, 808 flow [2022-12-13 20:54:39,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:54:39,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 20:54:39,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2269 transitions. [2022-12-13 20:54:39,083 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44833036949219524 [2022-12-13 20:54:39,083 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2269 transitions. [2022-12-13 20:54:39,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2269 transitions. [2022-12-13 20:54:39,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:54:39,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2269 transitions. [2022-12-13 20:54:39,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 324.14285714285717) internal successors, (2269), 7 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:39,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 723.0) internal successors, (5784), 8 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:39,106 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 723.0) internal successors, (5784), 8 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:39,106 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 287 flow. Second operand 7 states and 2269 transitions. [2022-12-13 20:54:39,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 141 transitions, 808 flow [2022-12-13 20:54:39,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 141 transitions, 792 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-12-13 20:54:39,114 INFO L231 Difference]: Finished difference. Result has 69 places, 46 transitions, 199 flow [2022-12-13 20:54:39,114 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=199, PETRI_PLACES=69, PETRI_TRANSITIONS=46} [2022-12-13 20:54:39,115 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2022-12-13 20:54:39,115 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 46 transitions, 199 flow [2022-12-13 20:54:39,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 312.0) internal successors, (1560), 5 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:39,116 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:54:39,116 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:54:39,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 20:54:39,116 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)] === [2022-12-13 20:54:39,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:54:39,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1656017761, now seen corresponding path program 1 times [2022-12-13 20:54:39,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:54:39,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950106125] [2022-12-13 20:54:39,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:54:39,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:54:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:54:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:54:39,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:54:39,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950106125] [2022-12-13 20:54:39,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950106125] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:54:39,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951556233] [2022-12-13 20:54:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:54:39,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:54:39,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:54:39,436 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:54:39,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 20:54:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:54:39,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 20:54:39,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:54:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:54:39,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:54:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:54:39,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951556233] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:54:39,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:54:39,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2022-12-13 20:54:39,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702203152] [2022-12-13 20:54:39,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:54:39,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 20:54:39,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:54:39,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 20:54:39,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-12-13 20:54:40,399 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 723 [2022-12-13 20:54:40,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 46 transitions, 199 flow. Second operand has 17 states, 17 states have (on average 295.5882352941176) internal successors, (5025), 17 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:40,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:54:40,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 723 [2022-12-13 20:54:40,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:54:42,226 INFO L130 PetriNetUnfolder]: 6602/9495 cut-off events. [2022-12-13 20:54:42,226 INFO L131 PetriNetUnfolder]: For 5003/5003 co-relation queries the response was YES. [2022-12-13 20:54:42,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23556 conditions, 9495 events. 6602/9495 cut-off events. For 5003/5003 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 48963 event pairs, 2274 based on Foata normal form. 6/8565 useless extension candidates. Maximal degree in co-relation 23517. Up to 1524 conditions per place. [2022-12-13 20:54:42,250 INFO L137 encePairwiseOnDemand]: 711/723 looper letters, 183 selfloop transitions, 21 changer transitions 169/373 dead transitions. [2022-12-13 20:54:42,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 373 transitions, 1946 flow [2022-12-13 20:54:42,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 20:54:42,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-13 20:54:42,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 8842 transitions. [2022-12-13 20:54:42,264 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42171030667238996 [2022-12-13 20:54:42,264 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 8842 transitions. [2022-12-13 20:54:42,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 8842 transitions. [2022-12-13 20:54:42,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:54:42,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 8842 transitions. [2022-12-13 20:54:42,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 304.8965517241379) internal successors, (8842), 29 states have internal predecessors, (8842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:42,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 723.0) internal successors, (21690), 30 states have internal predecessors, (21690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:42,304 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 723.0) internal successors, (21690), 30 states have internal predecessors, (21690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:42,304 INFO L175 Difference]: Start difference. First operand has 69 places, 46 transitions, 199 flow. Second operand 29 states and 8842 transitions. [2022-12-13 20:54:42,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 373 transitions, 1946 flow [2022-12-13 20:54:42,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 373 transitions, 1764 flow, removed 46 selfloop flow, removed 11 redundant places. [2022-12-13 20:54:42,314 INFO L231 Difference]: Finished difference. Result has 95 places, 61 transitions, 334 flow [2022-12-13 20:54:42,314 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=334, PETRI_PLACES=95, PETRI_TRANSITIONS=61} [2022-12-13 20:54:42,314 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 57 predicate places. [2022-12-13 20:54:42,314 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 61 transitions, 334 flow [2022-12-13 20:54:42,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 295.5882352941176) internal successors, (5025), 17 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:42,316 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:54:42,316 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:54:42,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 20:54:42,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:54:42,518 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)] === [2022-12-13 20:54:42,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:54:42,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1293860949, now seen corresponding path program 1 times [2022-12-13 20:54:42,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:54:42,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008542727] [2022-12-13 20:54:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:54:42,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:54:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:54:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:54:42,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:54:42,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008542727] [2022-12-13 20:54:42,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008542727] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:54:42,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:54:42,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:54:42,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533561160] [2022-12-13 20:54:42,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:54:42,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:54:42,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:54:42,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:54:42,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:54:42,735 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 723 [2022-12-13 20:54:42,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 61 transitions, 334 flow. Second operand has 5 states, 5 states have (on average 312.2) internal successors, (1561), 5 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:42,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:54:42,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 723 [2022-12-13 20:54:42,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:54:43,435 INFO L130 PetriNetUnfolder]: 4305/6175 cut-off events. [2022-12-13 20:54:43,435 INFO L131 PetriNetUnfolder]: For 12625/12625 co-relation queries the response was YES. [2022-12-13 20:54:43,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18518 conditions, 6175 events. 4305/6175 cut-off events. For 12625/12625 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 28862 event pairs, 2599 based on Foata normal form. 100/5698 useless extension candidates. Maximal degree in co-relation 15629. Up to 4965 conditions per place. [2022-12-13 20:54:43,452 INFO L137 encePairwiseOnDemand]: 715/723 looper letters, 49 selfloop transitions, 2 changer transitions 86/137 dead transitions. [2022-12-13 20:54:43,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 137 transitions, 857 flow [2022-12-13 20:54:43,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:54:43,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 20:54:43,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2272 transitions. [2022-12-13 20:54:43,455 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44892313771981823 [2022-12-13 20:54:43,455 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2272 transitions. [2022-12-13 20:54:43,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2272 transitions. [2022-12-13 20:54:43,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:54:43,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2272 transitions. [2022-12-13 20:54:43,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 324.57142857142856) internal successors, (2272), 7 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:43,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 723.0) internal successors, (5784), 8 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:43,462 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 723.0) internal successors, (5784), 8 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:43,462 INFO L175 Difference]: Start difference. First operand has 95 places, 61 transitions, 334 flow. Second operand 7 states and 2272 transitions. [2022-12-13 20:54:43,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 137 transitions, 857 flow [2022-12-13 20:54:43,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 137 transitions, 759 flow, removed 46 selfloop flow, removed 9 redundant places. [2022-12-13 20:54:43,498 INFO L231 Difference]: Finished difference. Result has 82 places, 51 transitions, 238 flow [2022-12-13 20:54:43,498 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=238, PETRI_PLACES=82, PETRI_TRANSITIONS=51} [2022-12-13 20:54:43,498 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 44 predicate places. [2022-12-13 20:54:43,498 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 51 transitions, 238 flow [2022-12-13 20:54:43,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 312.2) internal successors, (1561), 5 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:43,499 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:54:43,499 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:54:43,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 20:54:43,499 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)] === [2022-12-13 20:54:43,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:54:43,499 INFO L85 PathProgramCache]: Analyzing trace with hash -474256028, now seen corresponding path program 1 times [2022-12-13 20:54:43,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:54:43,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818701687] [2022-12-13 20:54:43,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:54:43,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:54:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:54:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:54:43,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:54:43,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818701687] [2022-12-13 20:54:43,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818701687] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:54:43,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927290536] [2022-12-13 20:54:43,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:54:43,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:54:43,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:54:43,652 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:54:43,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 20:54:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:54:43,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 20:54:43,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:54:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:54:43,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:54:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:54:43,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927290536] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 20:54:43,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:54:43,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-12-13 20:54:43,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715191786] [2022-12-13 20:54:43,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:54:43,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:54:43,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:54:43,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:54:43,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-13 20:54:44,065 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 723 [2022-12-13 20:54:44,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 51 transitions, 238 flow. Second operand has 7 states, 7 states have (on average 302.0) internal successors, (2114), 7 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:44,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:54:44,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 723 [2022-12-13 20:54:44,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:54:44,766 INFO L130 PetriNetUnfolder]: 4352/6331 cut-off events. [2022-12-13 20:54:44,767 INFO L131 PetriNetUnfolder]: For 5781/5781 co-relation queries the response was YES. [2022-12-13 20:54:44,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16225 conditions, 6331 events. 4352/6331 cut-off events. For 5781/5781 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 31753 event pairs, 1173 based on Foata normal form. 0/5875 useless extension candidates. Maximal degree in co-relation 16197. Up to 4090 conditions per place. [2022-12-13 20:54:44,784 INFO L137 encePairwiseOnDemand]: 715/723 looper letters, 64 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2022-12-13 20:54:44,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 75 transitions, 487 flow [2022-12-13 20:54:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:54:44,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 20:54:44,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2145 transitions. [2022-12-13 20:54:44,787 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42382928275044457 [2022-12-13 20:54:44,787 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2145 transitions. [2022-12-13 20:54:44,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2145 transitions. [2022-12-13 20:54:44,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:54:44,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2145 transitions. [2022-12-13 20:54:44,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 306.42857142857144) internal successors, (2145), 7 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:44,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 723.0) internal successors, (5784), 8 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:44,794 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 723.0) internal successors, (5784), 8 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:44,794 INFO L175 Difference]: Start difference. First operand has 82 places, 51 transitions, 238 flow. Second operand 7 states and 2145 transitions. [2022-12-13 20:54:44,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 75 transitions, 487 flow [2022-12-13 20:54:44,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 75 transitions, 459 flow, removed 6 selfloop flow, removed 8 redundant places. [2022-12-13 20:54:44,798 INFO L231 Difference]: Finished difference. Result has 72 places, 52 transitions, 250 flow [2022-12-13 20:54:44,798 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=250, PETRI_PLACES=72, PETRI_TRANSITIONS=52} [2022-12-13 20:54:44,798 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 34 predicate places. [2022-12-13 20:54:44,798 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 52 transitions, 250 flow [2022-12-13 20:54:44,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 302.0) internal successors, (2114), 7 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:44,799 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:54:44,799 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] [2022-12-13 20:54:44,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 20:54:44,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:54:45,001 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)] === [2022-12-13 20:54:45,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:54:45,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1511117689, now seen corresponding path program 1 times [2022-12-13 20:54:45,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:54:45,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215731807] [2022-12-13 20:54:45,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:54:45,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:54:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:54:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:54:45,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:54:45,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215731807] [2022-12-13 20:54:45,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215731807] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:54:45,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794451469] [2022-12-13 20:54:45,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:54:45,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:54:45,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:54:45,231 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:54:45,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 20:54:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:54:45,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 20:54:45,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:54:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:54:45,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:54:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:54:45,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794451469] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:54:45,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:54:45,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2022-12-13 20:54:45,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434719811] [2022-12-13 20:54:45,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:54:45,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 20:54:45,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:54:45,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 20:54:45,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-12-13 20:54:45,931 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 723 [2022-12-13 20:54:45,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 52 transitions, 250 flow. Second operand has 16 states, 16 states have (on average 296.3125) internal successors, (4741), 16 states have internal predecessors, (4741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:45,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:54:45,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 723 [2022-12-13 20:54:45,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:54:47,341 INFO L130 PetriNetUnfolder]: 10150/14755 cut-off events. [2022-12-13 20:54:47,341 INFO L131 PetriNetUnfolder]: For 13972/13972 co-relation queries the response was YES. [2022-12-13 20:54:47,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41894 conditions, 14755 events. 10150/14755 cut-off events. For 13972/13972 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 83015 event pairs, 4193 based on Foata normal form. 6/14761 useless extension candidates. Maximal degree in co-relation 29790. Up to 5684 conditions per place. [2022-12-13 20:54:47,379 INFO L137 encePairwiseOnDemand]: 714/723 looper letters, 165 selfloop transitions, 18 changer transitions 8/191 dead transitions. [2022-12-13 20:54:47,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 191 transitions, 1206 flow [2022-12-13 20:54:47,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 20:54:47,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 20:54:47,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3671 transitions. [2022-12-13 20:54:47,384 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4231212540341171 [2022-12-13 20:54:47,384 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3671 transitions. [2022-12-13 20:54:47,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3671 transitions. [2022-12-13 20:54:47,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:54:47,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3671 transitions. [2022-12-13 20:54:47,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 305.9166666666667) internal successors, (3671), 12 states have internal predecessors, (3671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:47,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 723.0) internal successors, (9399), 13 states have internal predecessors, (9399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:47,393 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 723.0) internal successors, (9399), 13 states have internal predecessors, (9399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:47,393 INFO L175 Difference]: Start difference. First operand has 72 places, 52 transitions, 250 flow. Second operand 12 states and 3671 transitions. [2022-12-13 20:54:47,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 191 transitions, 1206 flow [2022-12-13 20:54:47,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 191 transitions, 1183 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 20:54:47,405 INFO L231 Difference]: Finished difference. Result has 85 places, 65 transitions, 396 flow [2022-12-13 20:54:47,405 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=396, PETRI_PLACES=85, PETRI_TRANSITIONS=65} [2022-12-13 20:54:47,405 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 47 predicate places. [2022-12-13 20:54:47,405 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 65 transitions, 396 flow [2022-12-13 20:54:47,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 296.3125) internal successors, (4741), 16 states have internal predecessors, (4741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:47,406 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:54:47,406 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:54:47,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 20:54:47,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:54:47,608 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)] === [2022-12-13 20:54:47,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:54:47,609 INFO L85 PathProgramCache]: Analyzing trace with hash -120782997, now seen corresponding path program 1 times [2022-12-13 20:54:47,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:54:47,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404541152] [2022-12-13 20:54:47,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:54:47,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:54:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:54:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:54:47,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:54:47,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404541152] [2022-12-13 20:54:47,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404541152] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:54:47,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59422354] [2022-12-13 20:54:47,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:54:47,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:54:47,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:54:47,778 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:54:47,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 20:54:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:54:47,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 20:54:47,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:54:47,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:54:47,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:54:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:54:48,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59422354] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:54:48,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:54:48,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-12-13 20:54:48,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770610236] [2022-12-13 20:54:48,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:54:48,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 20:54:48,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:54:48,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 20:54:48,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2022-12-13 20:54:48,824 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 723 [2022-12-13 20:54:48,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 65 transitions, 396 flow. Second operand has 21 states, 21 states have (on average 300.5238095238095) internal successors, (6311), 21 states have internal predecessors, (6311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:48,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:54:48,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 723 [2022-12-13 20:54:48,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:54:51,206 INFO L130 PetriNetUnfolder]: 11752/17079 cut-off events. [2022-12-13 20:54:51,206 INFO L131 PetriNetUnfolder]: For 17375/17375 co-relation queries the response was YES. [2022-12-13 20:54:51,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48829 conditions, 17079 events. 11752/17079 cut-off events. For 17375/17375 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 99008 event pairs, 3629 based on Foata normal form. 66/17145 useless extension candidates. Maximal degree in co-relation 36623. Up to 4470 conditions per place. [2022-12-13 20:54:51,263 INFO L137 encePairwiseOnDemand]: 713/723 looper letters, 218 selfloop transitions, 26 changer transitions 8/252 dead transitions. [2022-12-13 20:54:51,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 252 transitions, 1598 flow [2022-12-13 20:54:51,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 20:54:51,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 20:54:51,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 5585 transitions. [2022-12-13 20:54:51,269 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42915321960965114 [2022-12-13 20:54:51,269 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 5585 transitions. [2022-12-13 20:54:51,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 5585 transitions. [2022-12-13 20:54:51,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:54:51,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 5585 transitions. [2022-12-13 20:54:51,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 310.27777777777777) internal successors, (5585), 18 states have internal predecessors, (5585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:51,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 723.0) internal successors, (13737), 19 states have internal predecessors, (13737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:51,282 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 723.0) internal successors, (13737), 19 states have internal predecessors, (13737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:51,282 INFO L175 Difference]: Start difference. First operand has 85 places, 65 transitions, 396 flow. Second operand 18 states and 5585 transitions. [2022-12-13 20:54:51,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 252 transitions, 1598 flow [2022-12-13 20:54:51,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 252 transitions, 1577 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-12-13 20:54:51,296 INFO L231 Difference]: Finished difference. Result has 103 places, 76 transitions, 507 flow [2022-12-13 20:54:51,296 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=507, PETRI_PLACES=103, PETRI_TRANSITIONS=76} [2022-12-13 20:54:51,296 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2022-12-13 20:54:51,296 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 76 transitions, 507 flow [2022-12-13 20:54:51,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 300.5238095238095) internal successors, (6311), 21 states have internal predecessors, (6311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:51,297 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:54:51,297 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:54:51,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 20:54:51,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:54:51,499 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)] === [2022-12-13 20:54:51,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:54:51,500 INFO L85 PathProgramCache]: Analyzing trace with hash 331885690, now seen corresponding path program 1 times [2022-12-13 20:54:51,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:54:51,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875353712] [2022-12-13 20:54:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:54:51,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:54:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:54:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:54:53,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:54:53,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875353712] [2022-12-13 20:54:53,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875353712] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:54:53,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293538659] [2022-12-13 20:54:53,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:54:53,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:54:53,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:54:53,371 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:54:53,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802e121c-90f8-486d-9b75-602d69130306/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 20:54:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:54:53,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-13 20:54:53,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:54:53,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 20:54:53,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 20:54:53,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 20:54:54,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:54:54,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:54:54,250 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 20:54:54,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2022-12-13 20:54:54,552 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 20:54:54,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 29 [2022-12-13 20:54:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:54:54,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:54:56,221 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:54:56,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 67 [2022-12-13 20:54:56,266 INFO L321 Elim1Store]: treesize reduction 4, result has 88.2 percent of original size [2022-12-13 20:54:56,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 5259 treesize of output 5000 [2022-12-13 20:54:56,355 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:54:56,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 4971 treesize of output 4851 [2022-12-13 20:54:56,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:54:56,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 4827 treesize of output 4563 [2022-12-13 20:54:56,459 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:54:56,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 4342 treesize of output 3838