./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 14:21:42,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:21:42,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:21:42,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:21:42,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:21:42,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:21:42,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:21:42,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:21:42,235 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:21:42,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:21:42,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:21:42,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:21:42,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:21:42,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:21:42,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:21:42,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:21:42,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:21:42,243 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:21:42,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:21:42,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:21:42,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:21:42,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:21:42,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:21:42,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:21:42,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:21:42,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:21:42,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:21:42,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:21:42,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:21:42,257 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:21:42,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:21:42,258 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:21:42,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:21:42,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:21:42,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:21:42,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:21:42,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:21:42,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:21:42,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:21:42,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:21:42,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:21:42,268 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 14:21:42,296 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:21:42,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:21:42,297 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:21:42,297 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:21:42,298 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:21:42,298 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:21:42,298 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:21:42,299 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:21:42,299 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:21:42,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:21:42,299 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:21:42,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:21:42,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:21:42,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:21:42,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 14:21:42,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:21:42,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 14:21:42,300 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:21:42,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 14:21:42,300 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:21:42,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 14:21:42,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:21:42,301 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:21:42,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:21:42,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:21:42,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:21:42,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:21:42,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 14:21:42,301 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:21:42,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:21:42,302 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:21:42,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 14:21:42,302 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:21:42,302 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:21:42,302 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:21:42,303 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_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 [2022-12-13 14:21:42,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:21:42,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:21:42,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:21:42,517 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:21:42,517 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:21:42,518 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2022-12-13 14:21:45,064 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:21:45,263 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:21:45,264 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2022-12-13 14:21:45,274 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/data/c50d5ac3c/26318d03f596404f91618cf9939b0572/FLAG72162613b [2022-12-13 14:21:45,634 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/data/c50d5ac3c/26318d03f596404f91618cf9939b0572 [2022-12-13 14:21:45,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:21:45,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:21:45,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:21:45,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:21:45,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:21:45,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:21:45" (1/1) ... [2022-12-13 14:21:45,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33eb020e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:45, skipping insertion in model container [2022-12-13 14:21:45,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:21:45" (1/1) ... [2022-12-13 14:21:45,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:21:45,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:21:45,973 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_558084e0-e790-4b2a-a60d-ce0c9e45c12c/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i[47038,47051] [2022-12-13 14:21:45,983 WARN L1576 CHandler]: Possible shadowing of function new [2022-12-13 14:21:45,984 WARN L1576 CHandler]: Possible shadowing of function new [2022-12-13 14:21:45,984 WARN L1576 CHandler]: Possible shadowing of function new [2022-12-13 14:21:45,984 WARN L1576 CHandler]: Possible shadowing of function new [2022-12-13 14:21:46,000 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:21:46,011 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:21:46,035 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_558084e0-e790-4b2a-a60d-ce0c9e45c12c/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i[47038,47051] [2022-12-13 14:21:46,037 WARN L1576 CHandler]: Possible shadowing of function new [2022-12-13 14:21:46,038 WARN L1576 CHandler]: Possible shadowing of function new [2022-12-13 14:21:46,038 WARN L1576 CHandler]: Possible shadowing of function new [2022-12-13 14:21:46,038 WARN L1576 CHandler]: Possible shadowing of function new [2022-12-13 14:21:46,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:21:46,081 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:21:46,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:46 WrapperNode [2022-12-13 14:21:46,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:21:46,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:21:46,083 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:21:46,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:21:46,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:46" (1/1) ... [2022-12-13 14:21:46,105 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:46" (1/1) ... [2022-12-13 14:21:46,130 INFO L138 Inliner]: procedures = 278, calls = 51, calls flagged for inlining = 11, calls inlined = 12, statements flattened = 221 [2022-12-13 14:21:46,130 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:21:46,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:21:46,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:21:46,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:21:46,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:46" (1/1) ... [2022-12-13 14:21:46,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:46" (1/1) ... [2022-12-13 14:21:46,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:46" (1/1) ... [2022-12-13 14:21:46,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:46" (1/1) ... [2022-12-13 14:21:46,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:46" (1/1) ... [2022-12-13 14:21:46,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:46" (1/1) ... [2022-12-13 14:21:46,162 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:46" (1/1) ... [2022-12-13 14:21:46,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:46" (1/1) ... [2022-12-13 14:21:46,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:21:46,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:21:46,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:21:46,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:21:46,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:46" (1/1) ... [2022-12-13 14:21:46,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:21:46,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:21:46,199 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:21:46,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:21:46,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 14:21:46,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 14:21:46,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:21:46,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 14:21:46,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 14:21:46,234 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 14:21:46,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 14:21:46,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:21:46,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 14:21:46,234 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 14:21:46,234 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 14:21:46,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 14:21:46,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:21:46,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:21:46,236 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 14:21:46,351 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:21:46,353 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:21:46,650 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:21:46,661 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:21:46,661 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-12-13 14:21:46,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:21:46 BoogieIcfgContainer [2022-12-13 14:21:46,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:21:46,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:21:46,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:21:46,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:21:46,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:21:45" (1/3) ... [2022-12-13 14:21:46,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f1d85de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:21:46, skipping insertion in model container [2022-12-13 14:21:46,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:21:46" (2/3) ... [2022-12-13 14:21:46,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f1d85de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:21:46, skipping insertion in model container [2022-12-13 14:21:46,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:21:46" (3/3) ... [2022-12-13 14:21:46,672 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_92-evilcollapse_racing.i [2022-12-13 14:21:46,679 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 14:21:46,687 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:21:46,687 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 14:21:46,687 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 14:21:46,775 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 14:21:46,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 253 transitions, 514 flow [2022-12-13 14:21:46,898 INFO L130 PetriNetUnfolder]: 28/270 cut-off events. [2022-12-13 14:21:46,898 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-12-13 14:21:46,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 270 events. 28/270 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 413 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 152. Up to 4 conditions per place. [2022-12-13 14:21:46,905 INFO L82 GeneralOperation]: Start removeDead. Operand has 230 places, 253 transitions, 514 flow [2022-12-13 14:21:46,911 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 248 transitions, 501 flow [2022-12-13 14:21:46,915 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:21:46,926 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 248 transitions, 501 flow [2022-12-13 14:21:46,928 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 248 transitions, 501 flow [2022-12-13 14:21:46,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 248 transitions, 501 flow [2022-12-13 14:21:46,977 INFO L130 PetriNetUnfolder]: 27/265 cut-off events. [2022-12-13 14:21:46,977 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:21:46,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 265 events. 27/265 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 362 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 152. Up to 4 conditions per place. [2022-12-13 14:21:46,982 INFO L119 LiptonReduction]: Number of co-enabled transitions 4094 [2022-12-13 14:22:02,810 WARN L233 SmtUtils]: Spent 8.71s on a formula simplification that was a NOOP. DAG size: 184 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 14:22:10,380 WARN L233 SmtUtils]: Spent 7.57s on a formula simplification that was a NOOP. DAG size: 172 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 14:22:17,606 WARN L233 SmtUtils]: Spent 7.22s on a formula simplification that was a NOOP. DAG size: 184 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 14:22:22,745 WARN L233 SmtUtils]: Spent 5.14s on a formula simplification that was a NOOP. DAG size: 172 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 14:22:22,749 INFO L134 LiptonReduction]: Checked pairs total: 3984 [2022-12-13 14:22:22,749 INFO L136 LiptonReduction]: Total number of compositions: 253 [2022-12-13 14:22:22,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:22:22,765 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;@7adce859, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:22:22,766 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 14:22:22,771 INFO L130 PetriNetUnfolder]: 3/17 cut-off events. [2022-12-13 14:22:22,771 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:22:22,771 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:22:22,772 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2022-12-13 14:22:22,772 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:22:22,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:22:22,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1058630972, now seen corresponding path program 1 times [2022-12-13 14:22:22,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:22:22,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110616503] [2022-12-13 14:22:22,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:22:22,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:22:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:22:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:22:22,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:22:22,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110616503] [2022-12-13 14:22:22,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110616503] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:22:22,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:22:22,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:22:22,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894324839] [2022-12-13 14:22:22,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:22:22,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:22:22,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:22:22,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:22:22,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:22:23,010 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 506 [2022-12-13 14:22:23,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 36 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:23,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:22:23,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 506 [2022-12-13 14:22:23,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:22:23,197 INFO L130 PetriNetUnfolder]: 48/113 cut-off events. [2022-12-13 14:22:23,197 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:22:23,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 113 events. 48/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 294 event pairs, 33 based on Foata normal form. 8/93 useless extension candidates. Maximal degree in co-relation 188. Up to 97 conditions per place. [2022-12-13 14:22:23,199 INFO L137 encePairwiseOnDemand]: 493/506 looper letters, 23 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2022-12-13 14:22:23,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 29 transitions, 113 flow [2022-12-13 14:22:23,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:22:23,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:22:23,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 714 transitions. [2022-12-13 14:22:23,210 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47035573122529645 [2022-12-13 14:22:23,210 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 714 transitions. [2022-12-13 14:22:23,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 714 transitions. [2022-12-13 14:22:23,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:22:23,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 714 transitions. [2022-12-13 14:22:23,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:23,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:23,222 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:23,224 INFO L175 Difference]: Start difference. First operand has 25 places, 36 transitions, 77 flow. Second operand 3 states and 714 transitions. [2022-12-13 14:22:23,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 29 transitions, 113 flow [2022-12-13 14:22:23,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 113 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:22:23,227 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 69 flow [2022-12-13 14:22:23,228 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2022-12-13 14:22:23,230 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2022-12-13 14:22:23,231 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 69 flow [2022-12-13 14:22:23,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:23,231 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:22:23,231 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:22:23,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 14:22:23,232 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:22:23,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:22:23,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1407446943, now seen corresponding path program 1 times [2022-12-13 14:22:23,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:22:23,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954865714] [2022-12-13 14:22:23,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:22:23,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:22:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:22:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:22:23,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:22:23,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954865714] [2022-12-13 14:22:23,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954865714] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:22:23,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:22:23,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:22:23,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487652086] [2022-12-13 14:22:23,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:22:23,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:22:23,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:22:23,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:22:23,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:22:23,313 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 506 [2022-12-13 14:22:23,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 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) [2022-12-13 14:22:23,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:22:23,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 506 [2022-12-13 14:22:23,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:22:23,456 INFO L130 PetriNetUnfolder]: 48/115 cut-off events. [2022-12-13 14:22:23,456 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:22:23,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 115 events. 48/115 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 294 event pairs, 33 based on Foata normal form. 2/92 useless extension candidates. Maximal degree in co-relation 212. Up to 100 conditions per place. [2022-12-13 14:22:23,457 INFO L137 encePairwiseOnDemand]: 503/506 looper letters, 22 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2022-12-13 14:22:23,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 119 flow [2022-12-13 14:22:23,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:22:23,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:22:23,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 702 transitions. [2022-12-13 14:22:23,461 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4624505928853755 [2022-12-13 14:22:23,461 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 702 transitions. [2022-12-13 14:22:23,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 702 transitions. [2022-12-13 14:22:23,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:22:23,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 702 transitions. [2022-12-13 14:22:23,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:23,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:23,466 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:23,466 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 69 flow. Second operand 3 states and 702 transitions. [2022-12-13 14:22:23,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 119 flow [2022-12-13 14:22:23,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 117 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:22:23,467 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 81 flow [2022-12-13 14:22:23,467 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2022-12-13 14:22:23,468 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2022-12-13 14:22:23,468 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 81 flow [2022-12-13 14:22:23,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 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) [2022-12-13 14:22:23,469 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:22:23,469 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:22:23,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 14:22:23,469 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:22:23,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:22:23,469 INFO L85 PathProgramCache]: Analyzing trace with hash -663853570, now seen corresponding path program 1 times [2022-12-13 14:22:23,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:22:23,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674039190] [2022-12-13 14:22:23,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:22:23,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:22:23,501 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:22:23,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499603862] [2022-12-13 14:22:23,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:22:23,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:22:23,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:22:23,503 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:22:23,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 14:22:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:22:23,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:22:23,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:22:23,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:22:23,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:22:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:22:23,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:22:23,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674039190] [2022-12-13 14:22:23,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:22:23,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499603862] [2022-12-13 14:22:23,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499603862] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:22:23,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:22:23,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-12-13 14:22:23,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353637755] [2022-12-13 14:22:23,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:22:23,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:22:23,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:22:23,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:22:23,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:22:23,699 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 506 [2022-12-13 14:22:23,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 81 flow. Second operand has 6 states, 6 states have (on average 226.83333333333334) internal successors, (1361), 6 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:23,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:22:23,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 506 [2022-12-13 14:22:23,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:22:23,928 INFO L130 PetriNetUnfolder]: 48/121 cut-off events. [2022-12-13 14:22:23,928 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 14:22:23,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 121 events. 48/121 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 300 event pairs, 33 based on Foata normal form. 6/102 useless extension candidates. Maximal degree in co-relation 219. Up to 100 conditions per place. [2022-12-13 14:22:23,929 INFO L137 encePairwiseOnDemand]: 503/506 looper letters, 22 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2022-12-13 14:22:23,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 31 transitions, 147 flow [2022-12-13 14:22:23,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:22:23,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:22:23,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1379 transitions. [2022-12-13 14:22:23,932 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4542160737812912 [2022-12-13 14:22:23,932 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1379 transitions. [2022-12-13 14:22:23,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1379 transitions. [2022-12-13 14:22:23,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:22:23,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1379 transitions. [2022-12-13 14:22:23,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 229.83333333333334) internal successors, (1379), 6 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:23,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 506.0) internal successors, (3542), 7 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:23,938 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 506.0) internal successors, (3542), 7 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:23,938 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 81 flow. Second operand 6 states and 1379 transitions. [2022-12-13 14:22:23,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 31 transitions, 147 flow [2022-12-13 14:22:23,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 143 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 14:22:23,939 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 119 flow [2022-12-13 14:22:23,940 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=119, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2022-12-13 14:22:23,940 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 11 predicate places. [2022-12-13 14:22:23,940 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 119 flow [2022-12-13 14:22:23,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 226.83333333333334) internal successors, (1361), 6 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:23,941 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:22:23,941 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:22:23,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:22:24,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:22:24,143 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:22:24,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:22:24,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1576931167, now seen corresponding path program 2 times [2022-12-13 14:22:24,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:22:24,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814322380] [2022-12-13 14:22:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:22:24,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:22:24,223 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:22:24,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458799955] [2022-12-13 14:22:24,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:22:24,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:22:24,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:22:24,224 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:22:24,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 14:22:24,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:22:24,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:22:24,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:22:24,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:22:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:22:24,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:22:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:22:24,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:22:24,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814322380] [2022-12-13 14:22:24,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:22:24,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458799955] [2022-12-13 14:22:24,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458799955] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:22:24,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:22:24,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-12-13 14:22:24,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615757065] [2022-12-13 14:22:24,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:22:24,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 14:22:24,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:22:24,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 14:22:24,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-12-13 14:22:24,595 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 506 [2022-12-13 14:22:24,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 119 flow. Second operand has 12 states, 12 states have (on average 226.41666666666666) internal successors, (2717), 12 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:24,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:22:24,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 506 [2022-12-13 14:22:24,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:22:25,532 INFO L130 PetriNetUnfolder]: 48/133 cut-off events. [2022-12-13 14:22:25,532 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2022-12-13 14:22:25,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 133 events. 48/133 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 351 event pairs, 33 based on Foata normal form. 12/120 useless extension candidates. Maximal degree in co-relation 215. Up to 100 conditions per place. [2022-12-13 14:22:25,533 INFO L137 encePairwiseOnDemand]: 503/506 looper letters, 22 selfloop transitions, 11 changer transitions 0/37 dead transitions. [2022-12-13 14:22:25,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 37 transitions, 221 flow [2022-12-13 14:22:25,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 14:22:25,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 14:22:25,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2738 transitions. [2022-12-13 14:22:25,537 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45092226613965747 [2022-12-13 14:22:25,537 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2738 transitions. [2022-12-13 14:22:25,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2738 transitions. [2022-12-13 14:22:25,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:22:25,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2738 transitions. [2022-12-13 14:22:25,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 228.16666666666666) internal successors, (2738), 12 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:25,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 506.0) internal successors, (6578), 13 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:25,548 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 506.0) internal successors, (6578), 13 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:25,548 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 119 flow. Second operand 12 states and 2738 transitions. [2022-12-13 14:22:25,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 37 transitions, 221 flow [2022-12-13 14:22:25,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 37 transitions, 207 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 14:22:25,550 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 201 flow [2022-12-13 14:22:25,550 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=201, PETRI_PLACES=52, PETRI_TRANSITIONS=37} [2022-12-13 14:22:25,551 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 27 predicate places. [2022-12-13 14:22:25,551 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 201 flow [2022-12-13 14:22:25,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 226.41666666666666) internal successors, (2717), 12 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:25,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:22:25,552 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:22:25,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 14:22:25,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:22:25,754 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:22:25,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:22:25,755 INFO L85 PathProgramCache]: Analyzing trace with hash -306758913, now seen corresponding path program 3 times [2022-12-13 14:22:25,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:22:25,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825177594] [2022-12-13 14:22:25,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:22:25,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:22:25,861 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:22:25,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361107787] [2022-12-13 14:22:25,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:22:25,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:22:25,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:22:25,863 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:22:25,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 14:22:26,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 14:22:26,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:22:26,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:22:26,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:22:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-13 14:22:26,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:22:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-13 14:22:26,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:22:26,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825177594] [2022-12-13 14:22:26,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:22:26,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361107787] [2022-12-13 14:22:26,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361107787] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:22:26,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:22:26,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-12-13 14:22:26,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752260083] [2022-12-13 14:22:26,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:22:26,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:22:26,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:22:26,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:22:26,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:22:26,184 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 506 [2022-12-13 14:22:26,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 201 flow. Second operand has 6 states, 6 states have (on average 227.16666666666666) internal successors, (1363), 6 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:26,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:22:26,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 506 [2022-12-13 14:22:26,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:22:26,610 INFO L130 PetriNetUnfolder]: 50/160 cut-off events. [2022-12-13 14:22:26,610 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2022-12-13 14:22:26,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 160 events. 50/160 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 291 event pairs, 33 based on Foata normal form. 3/138 useless extension candidates. Maximal degree in co-relation 310. Up to 94 conditions per place. [2022-12-13 14:22:26,611 INFO L137 encePairwiseOnDemand]: 502/506 looper letters, 66 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2022-12-13 14:22:26,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 694 flow [2022-12-13 14:22:26,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:22:26,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:22:26,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1385 transitions. [2022-12-13 14:22:26,614 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4561923583662714 [2022-12-13 14:22:26,614 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1385 transitions. [2022-12-13 14:22:26,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1385 transitions. [2022-12-13 14:22:26,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:22:26,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1385 transitions. [2022-12-13 14:22:26,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 230.83333333333334) internal successors, (1385), 6 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:26,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 506.0) internal successors, (3542), 7 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:26,619 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 506.0) internal successors, (3542), 7 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:26,619 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 201 flow. Second operand 6 states and 1385 transitions. [2022-12-13 14:22:26,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 694 flow [2022-12-13 14:22:26,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 76 transitions, 500 flow, removed 76 selfloop flow, removed 5 redundant places. [2022-12-13 14:22:26,623 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 236 flow [2022-12-13 14:22:26,623 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=236, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2022-12-13 14:22:26,623 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2022-12-13 14:22:26,623 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 236 flow [2022-12-13 14:22:26,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 227.16666666666666) internal successors, (1363), 6 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:26,624 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:22:26,624 INFO L209 CegarLoopForPetriNet]: trace histogram [40, 4, 4, 2, 1, 1, 1, 1, 1] [2022-12-13 14:22:26,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 14:22:26,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:22:26,825 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:22:26,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:22:26,825 INFO L85 PathProgramCache]: Analyzing trace with hash -322752336, now seen corresponding path program 4 times [2022-12-13 14:22:26,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:22:26,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531253368] [2022-12-13 14:22:26,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:22:26,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:22:27,084 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:22:27,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121646566] [2022-12-13 14:22:27,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:22:27,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:22:27,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:22:27,086 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:22:27,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 14:22:28,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:22:28,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:22:28,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 9543 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 14:22:28,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:22:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2022-12-13 14:22:28,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:22:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2022-12-13 14:22:29,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:22:29,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531253368] [2022-12-13 14:22:29,007 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:22:29,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121646566] [2022-12-13 14:22:29,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121646566] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:22:29,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:22:29,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-12-13 14:22:29,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054873388] [2022-12-13 14:22:29,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:22:29,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 14:22:29,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:22:29,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 14:22:29,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-12-13 14:22:29,068 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 506 [2022-12-13 14:22:29,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 236 flow. Second operand has 24 states, 24 states have (on average 226.33333333333334) internal successors, (5432), 24 states have internal predecessors, (5432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:29,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:22:29,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 506 [2022-12-13 14:22:29,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:22:30,152 INFO L130 PetriNetUnfolder]: 50/208 cut-off events. [2022-12-13 14:22:30,153 INFO L131 PetriNetUnfolder]: For 3489/3489 co-relation queries the response was YES. [2022-12-13 14:22:30,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 208 events. 50/208 cut-off events. For 3489/3489 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 291 event pairs, 33 based on Foata normal form. 48/231 useless extension candidates. Maximal degree in co-relation 423. Up to 106 conditions per place. [2022-12-13 14:22:30,154 INFO L137 encePairwiseOnDemand]: 503/506 looper letters, 24 selfloop transitions, 24 changer transitions 0/52 dead transitions. [2022-12-13 14:22:30,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 52 transitions, 404 flow [2022-12-13 14:22:30,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 14:22:30,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 14:22:30,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5456 transitions. [2022-12-13 14:22:30,160 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4492753623188406 [2022-12-13 14:22:30,161 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5456 transitions. [2022-12-13 14:22:30,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5456 transitions. [2022-12-13 14:22:30,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:22:30,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5456 transitions. [2022-12-13 14:22:30,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 227.33333333333334) internal successors, (5456), 24 states have internal predecessors, (5456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:30,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 506.0) internal successors, (12650), 25 states have internal predecessors, (12650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:30,180 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 506.0) internal successors, (12650), 25 states have internal predecessors, (12650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:30,180 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 236 flow. Second operand 24 states and 5456 transitions. [2022-12-13 14:22:30,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 52 transitions, 404 flow [2022-12-13 14:22:30,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 52 transitions, 396 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 14:22:30,183 INFO L231 Difference]: Finished difference. Result has 90 places, 52 transitions, 470 flow [2022-12-13 14:22:30,183 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=470, PETRI_PLACES=90, PETRI_TRANSITIONS=52} [2022-12-13 14:22:30,184 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 65 predicate places. [2022-12-13 14:22:30,184 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 52 transitions, 470 flow [2022-12-13 14:22:30,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 226.33333333333334) internal successors, (5432), 24 states have internal predecessors, (5432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:22:30,185 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:22:30,185 INFO L209 CegarLoopForPetriNet]: trace histogram [88, 4, 4, 2, 1, 1, 1, 1, 1] [2022-12-13 14:22:30,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 14:22:30,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 14:22:30,387 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:22:30,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:22:30,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1750067888, now seen corresponding path program 5 times [2022-12-13 14:22:30,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:22:30,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539220741] [2022-12-13 14:22:30,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:22:30,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:22:31,026 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:22:31,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182577178] [2022-12-13 14:22:31,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 14:22:31,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:22:31,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:22:31,027 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:22:31,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_558084e0-e790-4b2a-a60d-ce0c9e45c12c/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process