./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R --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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --- 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-38b53e6 [2022-11-25 17:50:53,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:50:53,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:50:53,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:50:53,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:50:53,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:50:53,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:50:53,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:50:53,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:50:53,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:50:53,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:50:53,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:50:53,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:50:53,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:50:53,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:50:53,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:50:53,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:50:53,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:50:53,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:50:53,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:50:53,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:50:53,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:50:53,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:50:53,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:50:53,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:50:53,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:50:53,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:50:53,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:50:53,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:50:53,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:50:53,249 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:50:53,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:50:53,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:50:53,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:50:53,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:50:53,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:50:53,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:50:53,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:50:53,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:50:53,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:50:53,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:50:53,257 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:50:53,283 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:50:53,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:50:53,284 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:50:53,284 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:50:53,285 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:50:53,286 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:50:53,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:50:53,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:50:53,288 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:50:53,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:50:53,290 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:50:53,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:50:53,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:50:53,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:50:53,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:50:53,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:50:53,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:50:53,292 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:50:53,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:50:53,292 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:50:53,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:50:53,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:50:53,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:50:53,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:50:53,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:50:53,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:50:53,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:50:53,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:50:53,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:50:53,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:50:53,295 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:50:53,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:50:53,295 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:50:53,296 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:50:53,296 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_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c [2022-11-25 17:50:53,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:50:53,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:50:53,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:50:53,642 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:50:53,643 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:50:53,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-11-25 17:50:56,811 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:50:57,003 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:50:57,004 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-11-25 17:50:57,011 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/data/9a7858a20/a8f611382ff845419ca64e2c9fd412c7/FLAGfcce42c1b [2022-11-25 17:50:57,026 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/data/9a7858a20/a8f611382ff845419ca64e2c9fd412c7 [2022-11-25 17:50:57,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:50:57,030 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:50:57,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:50:57,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:50:57,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:50:57,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:50:57" (1/1) ... [2022-11-25 17:50:57,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72f9346f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:57, skipping insertion in model container [2022-11-25 17:50:57,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:50:57" (1/1) ... [2022-11-25 17:50:57,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:50:57,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:50:57,254 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:50:57,256 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:50:57,259 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:50:57,260 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:50:57,264 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:50:57,265 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:50:57,266 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:50:57,267 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:50:57,268 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:50:57,268 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:50:57,269 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:50:57,270 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:50:57,270 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:50:57,271 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:50:57,279 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_e5f7a9bc-5011-45ec-b531-9b561010c928/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-11-25 17:50:57,302 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:50:57,312 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:50:57,326 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:50:57,327 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:50:57,328 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:50:57,329 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:50:57,330 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:50:57,334 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:50:57,334 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:50:57,335 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:50:57,335 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:50:57,336 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:50:57,336 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:50:57,337 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:50:57,338 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:50:57,338 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:50:57,343 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_e5f7a9bc-5011-45ec-b531-9b561010c928/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-11-25 17:50:57,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:50:57,360 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:50:57,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:57 WrapperNode [2022-11-25 17:50:57,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:50:57,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:50:57,362 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:50:57,362 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:50:57,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:57" (1/1) ... [2022-11-25 17:50:57,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:57" (1/1) ... [2022-11-25 17:50:57,406 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 151 [2022-11-25 17:50:57,407 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:50:57,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:50:57,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:50:57,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:50:57,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:57" (1/1) ... [2022-11-25 17:50:57,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:57" (1/1) ... [2022-11-25 17:50:57,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:57" (1/1) ... [2022-11-25 17:50:57,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:57" (1/1) ... [2022-11-25 17:50:57,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:57" (1/1) ... [2022-11-25 17:50:57,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:57" (1/1) ... [2022-11-25 17:50:57,451 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:57" (1/1) ... [2022-11-25 17:50:57,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:57" (1/1) ... [2022-11-25 17:50:57,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:50:57,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:50:57,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:50:57,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:50:57,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:57" (1/1) ... [2022-11-25 17:50:57,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:50:57,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:50:57,508 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:50:57,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:50:57,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:50:57,558 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:50:57,558 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:50:57,559 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:50:57,559 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:50:57,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:50:57,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:50:57,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:50:57,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:50:57,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:50:57,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:50:57,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:50:57,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:50:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:50:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:50:57,564 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:50:57,697 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:50:57,699 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:50:57,988 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:50:58,095 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:50:58,095 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 17:50:58,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:50:58 BoogieIcfgContainer [2022-11-25 17:50:58,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:50:58,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:50:58,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:50:58,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:50:58,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:50:57" (1/3) ... [2022-11-25 17:50:58,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a15f075 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:50:58, skipping insertion in model container [2022-11-25 17:50:58,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:57" (2/3) ... [2022-11-25 17:50:58,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a15f075 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:50:58, skipping insertion in model container [2022-11-25 17:50:58,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:50:58" (3/3) ... [2022-11-25 17:50:58,107 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2022-11-25 17:50:58,116 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:50:58,126 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:50:58,126 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:50:58,126 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:50:58,231 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:50:58,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 142 transitions, 300 flow [2022-11-25 17:50:58,365 INFO L130 PetriNetUnfolder]: 11/140 cut-off events. [2022-11-25 17:50:58,365 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:50:58,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 140 events. 11/140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 126 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 99. Up to 2 conditions per place. [2022-11-25 17:50:58,380 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 142 transitions, 300 flow [2022-11-25 17:50:58,385 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 131 transitions, 274 flow [2022-11-25 17:50:58,392 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:50:58,406 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 131 transitions, 274 flow [2022-11-25 17:50:58,409 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 131 transitions, 274 flow [2022-11-25 17:50:58,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 131 transitions, 274 flow [2022-11-25 17:50:58,450 INFO L130 PetriNetUnfolder]: 11/131 cut-off events. [2022-11-25 17:50:58,450 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:50:58,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 131 events. 11/131 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 125 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 99. Up to 2 conditions per place. [2022-11-25 17:50:58,453 INFO L119 LiptonReduction]: Number of co-enabled transitions 1292 [2022-11-25 17:51:04,629 INFO L134 LiptonReduction]: Checked pairs total: 1536 [2022-11-25 17:51:04,630 INFO L136 LiptonReduction]: Total number of compositions: 140 [2022-11-25 17:51:04,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:51:04,654 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;@48377c1a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:51:04,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 17:51:04,660 INFO L130 PetriNetUnfolder]: 4/18 cut-off events. [2022-11-25 17:51:04,661 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:51:04,661 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:04,662 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:04,662 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:51:04,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:04,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1723842038, now seen corresponding path program 1 times [2022-11-25 17:51:04,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:04,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067571112] [2022-11-25 17:51:04,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:04,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:05,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:05,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067571112] [2022-11-25 17:51:05,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067571112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:05,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:51:05,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:51:05,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49279221] [2022-11-25 17:51:05,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:05,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:51:05,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:05,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:51:05,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:51:05,326 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 282 [2022-11-25 17:51:05,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:05,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:05,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 282 [2022-11-25 17:51:05,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:05,434 INFO L130 PetriNetUnfolder]: 87/153 cut-off events. [2022-11-25 17:51:05,434 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-25 17:51:05,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 153 events. 87/153 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 497 event pairs, 21 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 244. Up to 87 conditions per place. [2022-11-25 17:51:05,437 INFO L137 encePairwiseOnDemand]: 278/282 looper letters, 21 selfloop transitions, 2 changer transitions 4/29 dead transitions. [2022-11-25 17:51:05,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 133 flow [2022-11-25 17:51:05,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:51:05,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:51:05,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 399 transitions. [2022-11-25 17:51:05,454 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4716312056737589 [2022-11-25 17:51:05,455 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 399 transitions. [2022-11-25 17:51:05,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 399 transitions. [2022-11-25 17:51:05,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:51:05,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 399 transitions. [2022-11-25 17:51:05,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:05,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:05,470 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:05,472 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 399 transitions. [2022-11-25 17:51:05,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 133 flow [2022-11-25 17:51:05,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 29 transitions, 119 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:51:05,478 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 52 flow [2022-11-25 17:51:05,480 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2022-11-25 17:51:05,483 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2022-11-25 17:51:05,484 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 52 flow [2022-11-25 17:51:05,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:05,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:05,485 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:05,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:51:05,485 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:51:05,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:05,486 INFO L85 PathProgramCache]: Analyzing trace with hash 353095737, now seen corresponding path program 1 times [2022-11-25 17:51:05,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:05,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862127231] [2022-11-25 17:51:05,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:05,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:05,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:05,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862127231] [2022-11-25 17:51:05,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862127231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:05,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:51:05,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:51:05,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558878843] [2022-11-25 17:51:05,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:05,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:51:05,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:05,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:51:05,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:51:05,770 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 282 [2022-11-25 17:51:05,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 120.75) internal successors, (483), 4 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:05,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:05,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 282 [2022-11-25 17:51:05,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:05,886 INFO L130 PetriNetUnfolder]: 74/139 cut-off events. [2022-11-25 17:51:05,886 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:51:05,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 139 events. 74/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 386 event pairs, 11 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 191. Up to 98 conditions per place. [2022-11-25 17:51:05,890 INFO L137 encePairwiseOnDemand]: 278/282 looper letters, 21 selfloop transitions, 4 changer transitions 6/32 dead transitions. [2022-11-25 17:51:05,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 32 transitions, 143 flow [2022-11-25 17:51:05,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:51:05,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:51:05,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 499 transitions. [2022-11-25 17:51:05,898 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4423758865248227 [2022-11-25 17:51:05,899 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 499 transitions. [2022-11-25 17:51:05,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 499 transitions. [2022-11-25 17:51:05,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:51:05,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 499 transitions. [2022-11-25 17:51:05,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:05,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 282.0) internal successors, (1410), 5 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:05,909 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 282.0) internal successors, (1410), 5 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:05,909 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 52 flow. Second operand 4 states and 499 transitions. [2022-11-25 17:51:05,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 32 transitions, 143 flow [2022-11-25 17:51:05,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 32 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:51:05,912 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 75 flow [2022-11-25 17:51:05,912 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=75, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2022-11-25 17:51:05,913 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2022-11-25 17:51:05,913 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 75 flow [2022-11-25 17:51:05,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.75) internal successors, (483), 4 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:05,915 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:05,915 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:05,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:51:05,915 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:51:05,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:05,920 INFO L85 PathProgramCache]: Analyzing trace with hash 769964133, now seen corresponding path program 1 times [2022-11-25 17:51:05,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:05,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134355827] [2022-11-25 17:51:05,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:05,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:51:06,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:06,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134355827] [2022-11-25 17:51:06,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134355827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:06,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:51:06,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:51:06,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836850548] [2022-11-25 17:51:06,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:06,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:51:06,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:06,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:51:06,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:51:06,199 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 282 [2022-11-25 17:51:06,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:06,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:06,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 282 [2022-11-25 17:51:06,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:06,294 INFO L130 PetriNetUnfolder]: 74/157 cut-off events. [2022-11-25 17:51:06,294 INFO L131 PetriNetUnfolder]: For 37/47 co-relation queries the response was YES. [2022-11-25 17:51:06,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 157 events. 74/157 cut-off events. For 37/47 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 519 event pairs, 50 based on Foata normal form. 15/168 useless extension candidates. Maximal degree in co-relation 269. Up to 123 conditions per place. [2022-11-25 17:51:06,296 INFO L137 encePairwiseOnDemand]: 278/282 looper letters, 18 selfloop transitions, 2 changer transitions 10/33 dead transitions. [2022-11-25 17:51:06,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 161 flow [2022-11-25 17:51:06,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:51:06,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:51:06,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 504 transitions. [2022-11-25 17:51:06,299 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44680851063829785 [2022-11-25 17:51:06,299 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 504 transitions. [2022-11-25 17:51:06,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 504 transitions. [2022-11-25 17:51:06,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:51:06,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 504 transitions. [2022-11-25 17:51:06,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:06,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 282.0) internal successors, (1410), 5 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:06,305 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 282.0) internal successors, (1410), 5 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:06,305 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 75 flow. Second operand 4 states and 504 transitions. [2022-11-25 17:51:06,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 161 flow [2022-11-25 17:51:06,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 161 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:51:06,307 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 91 flow [2022-11-25 17:51:06,308 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2022-11-25 17:51:06,308 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 8 predicate places. [2022-11-25 17:51:06,309 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 91 flow [2022-11-25 17:51:06,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:06,310 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:06,310 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:06,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:51:06,310 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:51:06,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:06,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1742547287, now seen corresponding path program 1 times [2022-11-25 17:51:06,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:06,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421502107] [2022-11-25 17:51:06,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:06,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:51:06,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:06,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421502107] [2022-11-25 17:51:06,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421502107] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:51:06,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063202591] [2022-11-25 17:51:06,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:06,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:06,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:51:06,576 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:51:06,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:51:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:06,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:51:06,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:51:06,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 116 [2022-11-25 17:51:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:51:07,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:51:07,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 6 [2022-11-25 17:51:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:51:07,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063202591] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:51:07,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:51:07,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 11 [2022-11-25 17:51:07,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881624624] [2022-11-25 17:51:07,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:51:07,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:51:07,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:07,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:51:07,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:51:07,393 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 282 [2022-11-25 17:51:07,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 91 flow. Second operand has 12 states, 12 states have (on average 119.25) internal successors, (1431), 12 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:07,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:07,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 282 [2022-11-25 17:51:07,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:07,637 INFO L130 PetriNetUnfolder]: 88/171 cut-off events. [2022-11-25 17:51:07,637 INFO L131 PetriNetUnfolder]: For 62/65 co-relation queries the response was YES. [2022-11-25 17:51:07,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 171 events. 88/171 cut-off events. For 62/65 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 531 event pairs, 1 based on Foata normal form. 14/182 useless extension candidates. Maximal degree in co-relation 426. Up to 35 conditions per place. [2022-11-25 17:51:07,639 INFO L137 encePairwiseOnDemand]: 276/282 looper letters, 26 selfloop transitions, 8 changer transitions 25/60 dead transitions. [2022-11-25 17:51:07,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 60 transitions, 304 flow [2022-11-25 17:51:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:51:07,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:51:07,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1220 transitions. [2022-11-25 17:51:07,644 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4326241134751773 [2022-11-25 17:51:07,644 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1220 transitions. [2022-11-25 17:51:07,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1220 transitions. [2022-11-25 17:51:07,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:51:07,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1220 transitions. [2022-11-25 17:51:07,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 122.0) internal successors, (1220), 10 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:07,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 282.0) internal successors, (3102), 11 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:07,656 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 282.0) internal successors, (3102), 11 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:07,657 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 91 flow. Second operand 10 states and 1220 transitions. [2022-11-25 17:51:07,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 60 transitions, 304 flow [2022-11-25 17:51:07,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 60 transitions, 296 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-25 17:51:07,660 INFO L231 Difference]: Finished difference. Result has 37 places, 22 transitions, 94 flow [2022-11-25 17:51:07,660 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=94, PETRI_PLACES=37, PETRI_TRANSITIONS=22} [2022-11-25 17:51:07,661 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 15 predicate places. [2022-11-25 17:51:07,661 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 22 transitions, 94 flow [2022-11-25 17:51:07,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 119.25) internal successors, (1431), 12 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:07,662 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:07,662 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:07,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:51:07,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:07,869 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:51:07,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:07,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1825240017, now seen corresponding path program 2 times [2022-11-25 17:51:07,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:07,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542039310] [2022-11-25 17:51:07,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:07,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:08,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:08,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542039310] [2022-11-25 17:51:08,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542039310] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:51:08,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57963846] [2022-11-25 17:51:08,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:51:08,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:08,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:51:08,843 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:51:08,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:51:08,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:51:08,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:51:08,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 17:51:08,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:51:09,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-25 17:51:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:51:09,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:51:09,521 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:51:09,522 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 192 treesize of output 156 [2022-11-25 17:51:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:51:09,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57963846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:51:09,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:51:09,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2022-11-25 17:51:09,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624457924] [2022-11-25 17:51:09,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:51:09,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 17:51:09,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:09,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 17:51:09,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:51:10,844 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 282 [2022-11-25 17:51:10,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 22 transitions, 94 flow. Second operand has 19 states, 19 states have (on average 98.52631578947368) internal successors, (1872), 19 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:10,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:10,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 282 [2022-11-25 17:51:10,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:12,144 INFO L130 PetriNetUnfolder]: 209/371 cut-off events. [2022-11-25 17:51:12,145 INFO L131 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES. [2022-11-25 17:51:12,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1140 conditions, 371 events. 209/371 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1265 event pairs, 4 based on Foata normal form. 3/372 useless extension candidates. Maximal degree in co-relation 583. Up to 76 conditions per place. [2022-11-25 17:51:12,150 INFO L137 encePairwiseOnDemand]: 272/282 looper letters, 72 selfloop transitions, 36 changer transitions 18/126 dead transitions. [2022-11-25 17:51:12,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 126 transitions, 739 flow [2022-11-25 17:51:12,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 17:51:12,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-25 17:51:12,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2720 transitions. [2022-11-25 17:51:12,159 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35723666929340686 [2022-11-25 17:51:12,160 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2720 transitions. [2022-11-25 17:51:12,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2720 transitions. [2022-11-25 17:51:12,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:51:12,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2720 transitions. [2022-11-25 17:51:12,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 100.74074074074075) internal successors, (2720), 27 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:12,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 282.0) internal successors, (7896), 28 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:12,187 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 282.0) internal successors, (7896), 28 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:12,188 INFO L175 Difference]: Start difference. First operand has 37 places, 22 transitions, 94 flow. Second operand 27 states and 2720 transitions. [2022-11-25 17:51:12,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 126 transitions, 739 flow [2022-11-25 17:51:12,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 126 transitions, 627 flow, removed 39 selfloop flow, removed 6 redundant places. [2022-11-25 17:51:12,198 INFO L231 Difference]: Finished difference. Result has 63 places, 52 transitions, 319 flow [2022-11-25 17:51:12,198 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=319, PETRI_PLACES=63, PETRI_TRANSITIONS=52} [2022-11-25 17:51:12,200 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 41 predicate places. [2022-11-25 17:51:12,201 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 52 transitions, 319 flow [2022-11-25 17:51:12,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 98.52631578947368) internal successors, (1872), 19 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:12,203 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:12,204 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:12,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 17:51:12,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:12,416 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:51:12,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:12,416 INFO L85 PathProgramCache]: Analyzing trace with hash 438498115, now seen corresponding path program 3 times [2022-11-25 17:51:12,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:12,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605863406] [2022-11-25 17:51:12,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:12,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:51:12,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:12,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605863406] [2022-11-25 17:51:12,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605863406] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:51:12,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939423313] [2022-11-25 17:51:12,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:51:12,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:12,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:51:12,875 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:51:12,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:51:12,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:51:12,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:51:12,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 17:51:12,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:51:13,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-25 17:51:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:51:13,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:51:13,623 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:51:13,624 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 96 treesize of output 76 [2022-11-25 17:51:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:51:13,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939423313] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:51:13,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:51:13,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 21 [2022-11-25 17:51:13,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799878119] [2022-11-25 17:51:13,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:51:13,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 17:51:13,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:13,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 17:51:13,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:51:14,354 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 282 [2022-11-25 17:51:14,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 52 transitions, 319 flow. Second operand has 22 states, 22 states have (on average 102.68181818181819) internal successors, (2259), 22 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:14,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:14,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 282 [2022-11-25 17:51:14,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:15,601 INFO L130 PetriNetUnfolder]: 385/660 cut-off events. [2022-11-25 17:51:15,601 INFO L131 PetriNetUnfolder]: For 2853/2853 co-relation queries the response was YES. [2022-11-25 17:51:15,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2889 conditions, 660 events. 385/660 cut-off events. For 2853/2853 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2523 event pairs, 0 based on Foata normal form. 20/678 useless extension candidates. Maximal degree in co-relation 2867. Up to 174 conditions per place. [2022-11-25 17:51:15,608 INFO L137 encePairwiseOnDemand]: 274/282 looper letters, 74 selfloop transitions, 73 changer transitions 1/148 dead transitions. [2022-11-25 17:51:15,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 148 transitions, 1263 flow [2022-11-25 17:51:15,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 17:51:15,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-25 17:51:15,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2715 transitions. [2022-11-25 17:51:15,617 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37029459901800327 [2022-11-25 17:51:15,618 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2715 transitions. [2022-11-25 17:51:15,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2715 transitions. [2022-11-25 17:51:15,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:51:15,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2715 transitions. [2022-11-25 17:51:15,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 104.42307692307692) internal successors, (2715), 26 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:15,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 282.0) internal successors, (7614), 27 states have internal predecessors, (7614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:15,641 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 282.0) internal successors, (7614), 27 states have internal predecessors, (7614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:15,641 INFO L175 Difference]: Start difference. First operand has 63 places, 52 transitions, 319 flow. Second operand 26 states and 2715 transitions. [2022-11-25 17:51:15,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 148 transitions, 1263 flow [2022-11-25 17:51:15,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 148 transitions, 1204 flow, removed 27 selfloop flow, removed 3 redundant places. [2022-11-25 17:51:15,651 INFO L231 Difference]: Finished difference. Result has 92 places, 92 transitions, 852 flow [2022-11-25 17:51:15,651 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=852, PETRI_PLACES=92, PETRI_TRANSITIONS=92} [2022-11-25 17:51:15,652 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 70 predicate places. [2022-11-25 17:51:15,652 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 92 transitions, 852 flow [2022-11-25 17:51:15,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 102.68181818181819) internal successors, (2259), 22 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:15,653 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:15,654 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:15,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 17:51:15,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:15,859 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:51:15,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:15,860 INFO L85 PathProgramCache]: Analyzing trace with hash 742802700, now seen corresponding path program 4 times [2022-11-25 17:51:15,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:15,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365812348] [2022-11-25 17:51:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:15,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:51:16,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:16,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365812348] [2022-11-25 17:51:16,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365812348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:51:16,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138845526] [2022-11-25 17:51:16,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:51:16,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:16,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:51:16,182 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:51:16,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:51:16,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:51:16,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:51:16,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:51:16,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:51:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:51:16,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:51:16,699 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-25 17:51:16,700 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 219 treesize of output 171 [2022-11-25 17:51:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:51:16,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138845526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:51:16,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:51:16,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-25 17:51:16,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455280011] [2022-11-25 17:51:16,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:51:16,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:51:16,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:16,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:51:16,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:51:17,073 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 282 [2022-11-25 17:51:17,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 92 transitions, 852 flow. Second operand has 12 states, 12 states have (on average 110.33333333333333) internal successors, (1324), 12 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:17,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:17,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 282 [2022-11-25 17:51:17,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:17,366 INFO L130 PetriNetUnfolder]: 361/642 cut-off events. [2022-11-25 17:51:17,369 INFO L131 PetriNetUnfolder]: For 8453/8457 co-relation queries the response was YES. [2022-11-25 17:51:17,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3549 conditions, 642 events. 361/642 cut-off events. For 8453/8457 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2593 event pairs, 192 based on Foata normal form. 22/657 useless extension candidates. Maximal degree in co-relation 3173. Up to 540 conditions per place. [2022-11-25 17:51:17,376 INFO L137 encePairwiseOnDemand]: 278/282 looper letters, 91 selfloop transitions, 5 changer transitions 1/101 dead transitions. [2022-11-25 17:51:17,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 101 transitions, 1043 flow [2022-11-25 17:51:17,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:51:17,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:51:17,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 685 transitions. [2022-11-25 17:51:17,381 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40484633569739953 [2022-11-25 17:51:17,381 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 685 transitions. [2022-11-25 17:51:17,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 685 transitions. [2022-11-25 17:51:17,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:51:17,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 685 transitions. [2022-11-25 17:51:17,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 114.16666666666667) internal successors, (685), 6 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:17,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 282.0) internal successors, (1974), 7 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:17,389 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 282.0) internal successors, (1974), 7 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:17,390 INFO L175 Difference]: Start difference. First operand has 92 places, 92 transitions, 852 flow. Second operand 6 states and 685 transitions. [2022-11-25 17:51:17,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 101 transitions, 1043 flow [2022-11-25 17:51:17,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 101 transitions, 822 flow, removed 79 selfloop flow, removed 10 redundant places. [2022-11-25 17:51:17,421 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 567 flow [2022-11-25 17:51:17,421 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=567, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2022-11-25 17:51:17,422 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 64 predicate places. [2022-11-25 17:51:17,422 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 567 flow [2022-11-25 17:51:17,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 110.33333333333333) internal successors, (1324), 12 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:17,423 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:17,423 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:17,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:51:17,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:17,629 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:51:17,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:17,630 INFO L85 PathProgramCache]: Analyzing trace with hash -323956444, now seen corresponding path program 5 times [2022-11-25 17:51:17,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:17,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766920530] [2022-11-25 17:51:17,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:17,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:19,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:19,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766920530] [2022-11-25 17:51:19,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766920530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:51:19,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636022258] [2022-11-25 17:51:19,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:51:19,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:19,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:51:19,115 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:51:19,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:51:19,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:51:19,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:51:19,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 17:51:19,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:51:19,777 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:51:19,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 15 [2022-11-25 17:51:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:19,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:51:20,683 INFO L321 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2022-11-25 17:51:20,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 276 treesize of output 234 [2022-11-25 17:51:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:21,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636022258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:51:21,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:51:21,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 33 [2022-11-25 17:51:21,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423049398] [2022-11-25 17:51:21,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:51:21,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 17:51:21,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:21,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 17:51:21,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 17:51:23,113 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 282 [2022-11-25 17:51:23,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 567 flow. Second operand has 35 states, 35 states have (on average 95.77142857142857) internal successors, (3352), 35 states have internal predecessors, (3352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:23,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:23,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 282 [2022-11-25 17:51:23,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:29,282 INFO L130 PetriNetUnfolder]: 1130/1963 cut-off events. [2022-11-25 17:51:29,282 INFO L131 PetriNetUnfolder]: For 22253/22253 co-relation queries the response was YES. [2022-11-25 17:51:29,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9919 conditions, 1963 events. 1130/1963 cut-off events. For 22253/22253 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10336 event pairs, 20 based on Foata normal form. 27/1987 useless extension candidates. Maximal degree in co-relation 9462. Up to 408 conditions per place. [2022-11-25 17:51:29,301 INFO L137 encePairwiseOnDemand]: 273/282 looper letters, 180 selfloop transitions, 181 changer transitions 59/420 dead transitions. [2022-11-25 17:51:29,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 420 transitions, 4087 flow [2022-11-25 17:51:29,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-25 17:51:29,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-11-25 17:51:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 6707 transitions. [2022-11-25 17:51:29,317 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34976011681268254 [2022-11-25 17:51:29,317 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 6707 transitions. [2022-11-25 17:51:29,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 6707 transitions. [2022-11-25 17:51:29,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:51:29,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 6707 transitions. [2022-11-25 17:51:29,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 98.63235294117646) internal successors, (6707), 68 states have internal predecessors, (6707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:29,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 282.0) internal successors, (19458), 69 states have internal predecessors, (19458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:29,366 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 282.0) internal successors, (19458), 69 states have internal predecessors, (19458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:29,366 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 567 flow. Second operand 68 states and 6707 transitions. [2022-11-25 17:51:29,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 420 transitions, 4087 flow [2022-11-25 17:51:29,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 420 transitions, 3910 flow, removed 82 selfloop flow, removed 6 redundant places. [2022-11-25 17:51:29,410 INFO L231 Difference]: Finished difference. Result has 175 places, 235 transitions, 3087 flow [2022-11-25 17:51:29,411 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=3087, PETRI_PLACES=175, PETRI_TRANSITIONS=235} [2022-11-25 17:51:29,411 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 153 predicate places. [2022-11-25 17:51:29,411 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 235 transitions, 3087 flow [2022-11-25 17:51:29,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 95.77142857142857) internal successors, (3352), 35 states have internal predecessors, (3352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:29,413 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:29,414 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:29,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:51:29,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:29,620 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:51:29,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:29,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1009154744, now seen corresponding path program 6 times [2022-11-25 17:51:29,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:29,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253541936] [2022-11-25 17:51:29,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:29,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:32,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:32,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253541936] [2022-11-25 17:51:32,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253541936] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:51:32,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371241520] [2022-11-25 17:51:32,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:51:32,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:32,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:51:32,067 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:51:32,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:51:32,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 17:51:32,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:51:32,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 17:51:32,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:51:32,796 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:51:32,797 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 51 treesize of output 15 [2022-11-25 17:51:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:32,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:51:33,740 INFO L321 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2022-11-25 17:51:33,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 268 treesize of output 226 [2022-11-25 17:51:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:34,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371241520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:51:34,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:51:34,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 36 [2022-11-25 17:51:34,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458488431] [2022-11-25 17:51:34,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:51:34,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 17:51:34,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:34,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 17:51:34,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1179, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 17:51:37,523 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 282 [2022-11-25 17:51:37,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 235 transitions, 3087 flow. Second operand has 38 states, 38 states have (on average 90.63157894736842) internal successors, (3444), 38 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:37,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:37,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 282 [2022-11-25 17:51:37,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:42,302 INFO L130 PetriNetUnfolder]: 1072/1864 cut-off events. [2022-11-25 17:51:42,302 INFO L131 PetriNetUnfolder]: For 19584/19584 co-relation queries the response was YES. [2022-11-25 17:51:42,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10431 conditions, 1864 events. 1072/1864 cut-off events. For 19584/19584 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9689 event pairs, 26 based on Foata normal form. 22/1884 useless extension candidates. Maximal degree in co-relation 10361. Up to 616 conditions per place. [2022-11-25 17:51:42,325 INFO L137 encePairwiseOnDemand]: 272/282 looper letters, 136 selfloop transitions, 167 changer transitions 47/350 dead transitions. [2022-11-25 17:51:42,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 350 transitions, 4705 flow [2022-11-25 17:51:42,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-25 17:51:42,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-25 17:51:42,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3644 transitions. [2022-11-25 17:51:42,337 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.33133296963084197 [2022-11-25 17:51:42,338 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3644 transitions. [2022-11-25 17:51:42,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3644 transitions. [2022-11-25 17:51:42,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:51:42,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3644 transitions. [2022-11-25 17:51:42,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 93.43589743589743) internal successors, (3644), 39 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:42,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 282.0) internal successors, (11280), 40 states have internal predecessors, (11280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:42,368 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 282.0) internal successors, (11280), 40 states have internal predecessors, (11280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:42,369 INFO L175 Difference]: Start difference. First operand has 175 places, 235 transitions, 3087 flow. Second operand 39 states and 3644 transitions. [2022-11-25 17:51:42,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 350 transitions, 4705 flow [2022-11-25 17:51:42,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 350 transitions, 3252 flow, removed 703 selfloop flow, removed 19 redundant places. [2022-11-25 17:51:42,572 INFO L231 Difference]: Finished difference. Result has 197 places, 234 transitions, 2491 flow [2022-11-25 17:51:42,572 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=1953, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2491, PETRI_PLACES=197, PETRI_TRANSITIONS=234} [2022-11-25 17:51:42,573 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 175 predicate places. [2022-11-25 17:51:42,574 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 234 transitions, 2491 flow [2022-11-25 17:51:42,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 90.63157894736842) internal successors, (3444), 38 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:42,575 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:42,575 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:42,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:51:42,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:42,789 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:51:42,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:42,789 INFO L85 PathProgramCache]: Analyzing trace with hash -351809612, now seen corresponding path program 7 times [2022-11-25 17:51:42,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:42,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711320022] [2022-11-25 17:51:42,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:42,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:42,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 17:51:42,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:42,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711320022] [2022-11-25 17:51:42,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711320022] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:51:42,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505683453] [2022-11-25 17:51:42,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:51:42,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:42,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:51:43,004 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:51:43,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:51:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:43,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 17:51:43,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:51:43,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 116 [2022-11-25 17:51:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:51:43,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:51:43,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 130 [2022-11-25 17:51:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:51:43,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505683453] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:51:43,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:51:43,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 9] total 16 [2022-11-25 17:51:43,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650311111] [2022-11-25 17:51:43,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:51:43,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 17:51:43,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:43,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 17:51:43,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:51:43,653 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 282 [2022-11-25 17:51:43,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 234 transitions, 2491 flow. Second operand has 17 states, 17 states have (on average 119.23529411764706) internal successors, (2027), 17 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:43,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:43,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 282 [2022-11-25 17:51:43,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:45,003 INFO L130 PetriNetUnfolder]: 1785/3138 cut-off events. [2022-11-25 17:51:45,003 INFO L131 PetriNetUnfolder]: For 16040/16040 co-relation queries the response was YES. [2022-11-25 17:51:45,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15676 conditions, 3138 events. 1785/3138 cut-off events. For 16040/16040 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18469 event pairs, 37 based on Foata normal form. 156/3287 useless extension candidates. Maximal degree in co-relation 15607. Up to 656 conditions per place. [2022-11-25 17:51:45,042 INFO L137 encePairwiseOnDemand]: 276/282 looper letters, 181 selfloop transitions, 330 changer transitions 30/543 dead transitions. [2022-11-25 17:51:45,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 543 transitions, 6621 flow [2022-11-25 17:51:45,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 17:51:45,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-11-25 17:51:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4272 transitions. [2022-11-25 17:51:45,049 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4328267477203647 [2022-11-25 17:51:45,049 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4272 transitions. [2022-11-25 17:51:45,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4272 transitions. [2022-11-25 17:51:45,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:51:45,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4272 transitions. [2022-11-25 17:51:45,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 122.05714285714286) internal successors, (4272), 35 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:45,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 282.0) internal successors, (10152), 36 states have internal predecessors, (10152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:45,077 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 282.0) internal successors, (10152), 36 states have internal predecessors, (10152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:45,077 INFO L175 Difference]: Start difference. First operand has 197 places, 234 transitions, 2491 flow. Second operand 35 states and 4272 transitions. [2022-11-25 17:51:45,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 543 transitions, 6621 flow [2022-11-25 17:51:45,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 543 transitions, 5651 flow, removed 188 selfloop flow, removed 29 redundant places. [2022-11-25 17:51:45,224 INFO L231 Difference]: Finished difference. Result has 192 places, 386 transitions, 5231 flow [2022-11-25 17:51:45,226 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=1723, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=5231, PETRI_PLACES=192, PETRI_TRANSITIONS=386} [2022-11-25 17:51:45,228 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 170 predicate places. [2022-11-25 17:51:45,228 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 386 transitions, 5231 flow [2022-11-25 17:51:45,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 119.23529411764706) internal successors, (2027), 17 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:45,229 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:45,229 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:45,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:51:45,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:45,435 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:51:45,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:45,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1917237965, now seen corresponding path program 8 times [2022-11-25 17:51:45,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:45,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3667965] [2022-11-25 17:51:45,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:45,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:51:45,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:45,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3667965] [2022-11-25 17:51:45,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3667965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:51:45,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756208586] [2022-11-25 17:51:45,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:51:45,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:45,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:51:45,919 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:51:45,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:51:46,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:51:46,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:51:46,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:51:46,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:51:46,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:51:46,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:51:47,015 INFO L321 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2022-11-25 17:51:47,016 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 249 treesize of output 183 [2022-11-25 17:51:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:51:47,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756208586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:51:47,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:51:47,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-11-25 17:51:47,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408670071] [2022-11-25 17:51:47,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:51:47,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 17:51:47,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:47,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 17:51:47,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:51:47,575 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 282 [2022-11-25 17:51:47,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 386 transitions, 5231 flow. Second operand has 19 states, 19 states have (on average 108.21052631578948) internal successors, (2056), 19 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:47,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:51:47,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 282 [2022-11-25 17:51:47,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:51:48,292 INFO L130 PetriNetUnfolder]: 1198/2107 cut-off events. [2022-11-25 17:51:48,293 INFO L131 PetriNetUnfolder]: For 13379/13387 co-relation queries the response was YES. [2022-11-25 17:51:48,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12074 conditions, 2107 events. 1198/2107 cut-off events. For 13379/13387 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11074 event pairs, 628 based on Foata normal form. 8/2108 useless extension candidates. Maximal degree in co-relation 12027. Up to 2016 conditions per place. [2022-11-25 17:51:48,319 INFO L137 encePairwiseOnDemand]: 277/282 looper letters, 251 selfloop transitions, 4 changer transitions 22/281 dead transitions. [2022-11-25 17:51:48,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 281 transitions, 4277 flow [2022-11-25 17:51:48,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:51:48,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:51:48,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 991 transitions. [2022-11-25 17:51:48,322 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3904649330181245 [2022-11-25 17:51:48,322 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 991 transitions. [2022-11-25 17:51:48,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 991 transitions. [2022-11-25 17:51:48,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:51:48,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 991 transitions. [2022-11-25 17:51:48,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 110.11111111111111) internal successors, (991), 9 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:48,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 282.0) internal successors, (2820), 10 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:48,328 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 282.0) internal successors, (2820), 10 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:48,329 INFO L175 Difference]: Start difference. First operand has 192 places, 386 transitions, 5231 flow. Second operand 9 states and 991 transitions. [2022-11-25 17:51:48,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 281 transitions, 4277 flow [2022-11-25 17:51:48,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 281 transitions, 3506 flow, removed 288 selfloop flow, removed 19 redundant places. [2022-11-25 17:51:48,501 INFO L231 Difference]: Finished difference. Result has 148 places, 259 transitions, 2826 flow [2022-11-25 17:51:48,502 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=2935, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2826, PETRI_PLACES=148, PETRI_TRANSITIONS=259} [2022-11-25 17:51:48,503 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 126 predicate places. [2022-11-25 17:51:48,503 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 259 transitions, 2826 flow [2022-11-25 17:51:48,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 108.21052631578948) internal successors, (2056), 19 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:51:48,504 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:51:48,505 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:48,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:51:48,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:48,710 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:51:48,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:48,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1231890999, now seen corresponding path program 9 times [2022-11-25 17:51:48,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:48,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693178835] [2022-11-25 17:51:48,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:48,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:50,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:50,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693178835] [2022-11-25 17:51:50,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693178835] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:51:50,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823245212] [2022-11-25 17:51:50,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:51:50,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:50,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:51:50,891 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:51:50,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5f7a9bc-5011-45ec-b531-9b561010c928/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:51:51,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:51:51,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:51:51,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-25 17:51:51,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:51:51,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:51:51,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:51:51,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:51:52,439 INFO L321 Elim1Store]: treesize reduction 90, result has 7.2 percent of original size [2022-11-25 17:51:52,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 26 [2022-11-25 17:51:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:52,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:09,545 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:09,546 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 181 treesize of output 121 [2022-11-25 17:52:09,677 INFO L321 Elim1Store]: treesize reduction 62, result has 60.5 percent of original size [2022-11-25 17:52:09,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 373 treesize of output 417 [2022-11-25 17:52:09,805 INFO L321 Elim1Store]: treesize reduction 62, result has 60.5 percent of original size [2022-11-25 17:52:09,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 323 treesize of output 341 [2022-11-25 17:52:09,943 INFO L321 Elim1Store]: treesize reduction 62, result has 60.5 percent of original size [2022-11-25 17:52:09,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 247 treesize of output 303 [2022-11-25 17:52:16,192 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:16,192 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 181 treesize of output 121 [2022-11-25 17:52:16,268 INFO L321 Elim1Store]: treesize reduction 144, result has 8.3 percent of original size [2022-11-25 17:52:16,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 785 treesize of output 697 [2022-11-25 17:52:16,350 INFO L321 Elim1Store]: treesize reduction 144, result has 8.3 percent of original size [2022-11-25 17:52:16,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 685 treesize of output 545 [2022-11-25 17:52:16,418 INFO L321 Elim1Store]: treesize reduction 144, result has 8.3 percent of original size [2022-11-25 17:52:16,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 533 treesize of output 469 [2022-11-25 17:52:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:17,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823245212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:17,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:52:17,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 51 [2022-11-25 17:52:17,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740873615] [2022-11-25 17:52:17,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:17,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-25 17:52:17,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:17,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-25 17:52:17,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=2410, Unknown=9, NotChecked=0, Total=2756 [2022-11-25 17:52:19,432 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 282 [2022-11-25 17:52:19,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 259 transitions, 2826 flow. Second operand has 53 states, 53 states have (on average 74.39622641509433) internal successors, (3943), 53 states have internal predecessors, (3943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:19,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:19,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 282 [2022-11-25 17:52:19,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:49,260 WARN L233 SmtUtils]: Spent 21.58s on a formula simplification. DAG size of input: 152 DAG size of output: 145 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:52:53,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:52:55,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:53:04,563 WARN L233 SmtUtils]: Spent 6.36s on a formula simplification. DAG size of input: 234 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:53:08,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:53:10,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:53:19,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:53:21,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:53:25,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:01,858 WARN L233 SmtUtils]: Spent 26.07s on a formula simplification. DAG size of input: 181 DAG size of output: 123 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:54:03,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:09,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:11,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:13,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:15,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:56,173 WARN L233 SmtUtils]: Spent 1.65m on a formula simplification. DAG size of input: 146 DAG size of output: 138 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:55:58,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:55:59,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 17:56:01,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:14,687 WARN L233 SmtUtils]: Spent 12.05s on a formula simplification. DAG size of input: 193 DAG size of output: 192 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:56:18,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:20,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:35,977 WARN L233 SmtUtils]: Spent 8.81s on a formula simplification. DAG size of input: 115 DAG size of output: 114 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:56:37,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:39,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:41,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:47,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:49,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:51,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:54,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:56,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:58,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:07,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:09,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:11,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:13,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:19,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:20,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:22,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:24,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:26,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:29,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:31,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:33,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:35,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:37,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:39,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:41,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:44,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:46,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:59:54,475 WARN L233 SmtUtils]: Spent 2.06m on a formula simplification. DAG size of input: 211 DAG size of output: 183 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:59:56,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:08,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:10,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:12,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:26,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:28,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:30,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:17,327 WARN L233 SmtUtils]: Spent 38.66s on a formula simplification. DAG size of input: 227 DAG size of output: 137 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:01:19,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:21,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:26,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:02:03,994 WARN L233 SmtUtils]: Spent 30.55s on a formula simplification. DAG size of input: 233 DAG size of output: 146 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:02:19,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:02:26,804 WARN L233 SmtUtils]: Spent 6.57s on a formula simplification. DAG size of input: 116 DAG size of output: 115 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:02:29,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:02:31,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:02:33,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:02:43,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:02:45,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:03:51,402 WARN L233 SmtUtils]: Spent 57.60s on a formula simplification. DAG size of input: 146 DAG size of output: 145 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:03:53,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:04:16,168 WARN L233 SmtUtils]: Spent 17.60s on a formula simplification. DAG size of input: 199 DAG size of output: 126 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:04:19,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:04:22,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:04:26,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:04:28,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:04:52,326 WARN L233 SmtUtils]: Spent 17.22s on a formula simplification. DAG size of input: 211 DAG size of output: 124 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:04:59,945 WARN L233 SmtUtils]: Spent 7.22s on a formula simplification. DAG size of input: 166 DAG size of output: 129 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:05:02,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:05:04,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:05:11,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:05:13,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:05:16,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:05:18,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:05:23,604 WARN L233 SmtUtils]: Spent 5.00s on a formula simplification. DAG size of input: 115 DAG size of output: 109 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:05:25,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]