./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/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_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/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_b2e7697f-1ce3-47bf-961a-4f599b02a824/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 dad265ed8a17f32bb0a174302dfe188f9a15f60b81cc9c28a67851ab05270da2 --- 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 15:47:02,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:47:02,215 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:47:02,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:47:02,233 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:47:02,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:47:02,235 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:47:02,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:47:02,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:47:02,239 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:47:02,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:47:02,241 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:47:02,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:47:02,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:47:02,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:47:02,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:47:02,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:47:02,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:47:02,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:47:02,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:47:02,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:47:02,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:47:02,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:47:02,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:47:02,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:47:02,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:47:02,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:47:02,259 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:47:02,260 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:47:02,261 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:47:02,261 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:47:02,262 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:47:02,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:47:02,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:47:02,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:47:02,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:47:02,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:47:02,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:47:02,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:47:02,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:47:02,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:47:02,268 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 15:47:02,282 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:47:02,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:47:02,283 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:47:02,283 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:47:02,283 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:47:02,283 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:47:02,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:47:02,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:47:02,284 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:47:02,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:47:02,284 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:47:02,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:47:02,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:47:02,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:47:02,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 15:47:02,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:47:02,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 15:47:02,285 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:47:02,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 15:47:02,285 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:47:02,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 15:47:02,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:47:02,286 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:47:02,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:47:02,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:47:02,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:47:02,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:47:02,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 15:47:02,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:47:02,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:47:02,287 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:47:02,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 15:47:02,287 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:47:02,287 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:47:02,287 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:47:02,287 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_b2e7697f-1ce3-47bf-961a-4f599b02a824/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dad265ed8a17f32bb0a174302dfe188f9a15f60b81cc9c28a67851ab05270da2 [2022-12-13 15:47:02,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:47:02,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:47:02,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:47:02,508 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:47:02,508 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:47:02,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i [2022-12-13 15:47:05,101 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:47:05,306 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:47:05,307 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i [2022-12-13 15:47:05,316 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/data/6dc150954/d6cff72d0dc14371b52c79cf696719c1/FLAG4cbc05800 [2022-12-13 15:47:05,703 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/data/6dc150954/d6cff72d0dc14371b52c79cf696719c1 [2022-12-13 15:47:05,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:47:05,714 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:47:05,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:47:05,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:47:05,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:47:05,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:47:05" (1/1) ... [2022-12-13 15:47:05,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35ddfc68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:05, skipping insertion in model container [2022-12-13 15:47:05,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:47:05" (1/1) ... [2022-12-13 15:47:05,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:47:05,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:47:06,048 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_b2e7697f-1ce3-47bf-961a-4f599b02a824/sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i[47038,47051] [2022-12-13 15:47:06,061 WARN L1576 CHandler]: Possible shadowing of function new [2022-12-13 15:47:06,061 WARN L1576 CHandler]: Possible shadowing of function new [2022-12-13 15:47:06,061 WARN L1576 CHandler]: Possible shadowing of function new [2022-12-13 15:47:06,062 WARN L1576 CHandler]: Possible shadowing of function new [2022-12-13 15:47:06,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:47:06,100 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:47:06,132 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_b2e7697f-1ce3-47bf-961a-4f599b02a824/sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i[47038,47051] [2022-12-13 15:47:06,136 WARN L1576 CHandler]: Possible shadowing of function new [2022-12-13 15:47:06,136 WARN L1576 CHandler]: Possible shadowing of function new [2022-12-13 15:47:06,136 WARN L1576 CHandler]: Possible shadowing of function new [2022-12-13 15:47:06,137 WARN L1576 CHandler]: Possible shadowing of function new [2022-12-13 15:47:06,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:47:06,197 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:47:06,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:06 WrapperNode [2022-12-13 15:47:06,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:47:06,198 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:47:06,198 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:47:06,198 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:47:06,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:06" (1/1) ... [2022-12-13 15:47:06,220 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:06" (1/1) ... [2022-12-13 15:47:06,247 INFO L138 Inliner]: procedures = 279, calls = 51, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 223 [2022-12-13 15:47:06,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:47:06,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:47:06,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:47:06,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:47:06,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:06" (1/1) ... [2022-12-13 15:47:06,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:06" (1/1) ... [2022-12-13 15:47:06,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:06" (1/1) ... [2022-12-13 15:47:06,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:06" (1/1) ... [2022-12-13 15:47:06,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:06" (1/1) ... [2022-12-13 15:47:06,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:06" (1/1) ... [2022-12-13 15:47:06,277 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:06" (1/1) ... [2022-12-13 15:47:06,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:06" (1/1) ... [2022-12-13 15:47:06,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:47:06,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:47:06,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:47:06,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:47:06,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:06" (1/1) ... [2022-12-13 15:47:06,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:47:06,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:47:06,309 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:47:06,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:47:06,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 15:47:06,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 15:47:06,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:47:06,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 15:47:06,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 15:47:06,351 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 15:47:06,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 15:47:06,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:47:06,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 15:47:06,352 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 15:47:06,352 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 15:47:06,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 15:47:06,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:47:06,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:47:06,360 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 15:47:06,477 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:47:06,479 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:47:06,784 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:47:06,792 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:47:06,793 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-12-13 15:47:06,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:47:06 BoogieIcfgContainer [2022-12-13 15:47:06,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:47:06,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:47:06,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:47:06,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:47:06,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:47:05" (1/3) ... [2022-12-13 15:47:06,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623dbf98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:47:06, skipping insertion in model container [2022-12-13 15:47:06,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:06" (2/3) ... [2022-12-13 15:47:06,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623dbf98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:47:06, skipping insertion in model container [2022-12-13 15:47:06,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:47:06" (3/3) ... [2022-12-13 15:47:06,803 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_93-evilcollapse_racefree.i [2022-12-13 15:47:06,812 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 15:47:06,819 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:47:06,819 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 15:47:06,819 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 15:47:06,878 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 15:47:06,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 256 transitions, 520 flow [2022-12-13 15:47:06,992 INFO L130 PetriNetUnfolder]: 29/273 cut-off events. [2022-12-13 15:47:06,992 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-12-13 15:47:06,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 273 events. 29/273 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 572 event pairs, 0 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 155. Up to 4 conditions per place. [2022-12-13 15:47:06,998 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 256 transitions, 520 flow [2022-12-13 15:47:07,004 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 251 transitions, 507 flow [2022-12-13 15:47:07,007 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:47:07,018 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 228 places, 251 transitions, 507 flow [2022-12-13 15:47:07,020 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 228 places, 251 transitions, 507 flow [2022-12-13 15:47:07,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 251 transitions, 507 flow [2022-12-13 15:47:07,065 INFO L130 PetriNetUnfolder]: 28/268 cut-off events. [2022-12-13 15:47:07,065 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:47:07,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 268 events. 28/268 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 525 event pairs, 0 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 155. Up to 4 conditions per place. [2022-12-13 15:47:07,076 INFO L119 LiptonReduction]: Number of co-enabled transitions 4094 [2022-12-13 15:47:22,440 WARN L233 SmtUtils]: Spent 7.74s on a formula simplification that was a NOOP. DAG size: 176 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 15:47:29,965 WARN L233 SmtUtils]: Spent 7.52s 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 15:47:37,050 WARN L233 SmtUtils]: Spent 7.08s on a formula simplification that was a NOOP. DAG size: 176 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 15:47:46,499 WARN L233 SmtUtils]: Spent 9.45s 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 15:47:46,675 INFO L134 LiptonReduction]: Checked pairs total: 3793 [2022-12-13 15:47:46,675 INFO L136 LiptonReduction]: Total number of compositions: 258 [2022-12-13 15:47:46,685 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:47:46,695 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;@19903567, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:47:46,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 15:47:46,700 INFO L130 PetriNetUnfolder]: 3/17 cut-off events. [2022-12-13 15:47:46,700 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:47:46,700 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:46,700 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2022-12-13 15:47:46,700 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 15:47:46,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:46,704 INFO L85 PathProgramCache]: Analyzing trace with hash 71869919, now seen corresponding path program 1 times [2022-12-13 15:47:46,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:47:46,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148592328] [2022-12-13 15:47:46,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:46,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:47:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:46,980 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 15:47:46,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:47:46,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148592328] [2022-12-13 15:47:46,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148592328] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:47:46,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:47:46,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:47:46,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095655764] [2022-12-13 15:47:46,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:47:46,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:47:46,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:47:47,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:47:47,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:47:47,034 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 514 [2022-12-13 15:47:47,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 36 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 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 15:47:47,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:47:47,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 514 [2022-12-13 15:47:47,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:47:47,232 INFO L130 PetriNetUnfolder]: 48/112 cut-off events. [2022-12-13 15:47:47,232 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:47:47,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 112 events. 48/112 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 277 event pairs, 33 based on Foata normal form. 8/92 useless extension candidates. Maximal degree in co-relation 188. Up to 97 conditions per place. [2022-12-13 15:47:47,233 INFO L137 encePairwiseOnDemand]: 501/514 looper letters, 23 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2022-12-13 15:47:47,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 29 transitions, 113 flow [2022-12-13 15:47:47,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:47:47,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:47:47,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 723 transitions. [2022-12-13 15:47:47,246 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4688715953307393 [2022-12-13 15:47:47,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 723 transitions. [2022-12-13 15:47:47,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 723 transitions. [2022-12-13 15:47:47,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:47:47,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 723 transitions. [2022-12-13 15:47:47,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 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 15:47:47,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 514.0) internal successors, (2056), 4 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:47:47,262 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 514.0) internal successors, (2056), 4 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:47:47,264 INFO L175 Difference]: Start difference. First operand has 25 places, 36 transitions, 77 flow. Second operand 3 states and 723 transitions. [2022-12-13 15:47:47,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 29 transitions, 113 flow [2022-12-13 15:47:47,266 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 15:47:47,267 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 69 flow [2022-12-13 15:47:47,269 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, 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 15:47:47,271 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2022-12-13 15:47:47,271 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 69 flow [2022-12-13 15:47:47,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 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 15:47:47,272 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:47,272 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:47:47,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:47:47,272 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 15:47:47,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:47,273 INFO L85 PathProgramCache]: Analyzing trace with hash 669189517, now seen corresponding path program 1 times [2022-12-13 15:47:47,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:47:47,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749583617] [2022-12-13 15:47:47,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:47,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:47:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:47,326 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 15:47:47,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:47:47,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749583617] [2022-12-13 15:47:47,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749583617] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:47:47,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:47:47,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:47:47,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242331811] [2022-12-13 15:47:47,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:47:47,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:47:47,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:47:47,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:47:47,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:47:47,340 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 514 [2022-12-13 15:47:47,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 0 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 15:47:47,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:47:47,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 514 [2022-12-13 15:47:47,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:47:47,517 INFO L130 PetriNetUnfolder]: 48/114 cut-off events. [2022-12-13 15:47:47,517 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:47:47,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 114 events. 48/114 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 278 event pairs, 33 based on Foata normal form. 2/91 useless extension candidates. Maximal degree in co-relation 210. Up to 100 conditions per place. [2022-12-13 15:47:47,518 INFO L137 encePairwiseOnDemand]: 511/514 looper letters, 22 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2022-12-13 15:47:47,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 119 flow [2022-12-13 15:47:47,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:47:47,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:47:47,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 711 transitions. [2022-12-13 15:47:47,523 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46108949416342415 [2022-12-13 15:47:47,523 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 711 transitions. [2022-12-13 15:47:47,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 711 transitions. [2022-12-13 15:47:47,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:47:47,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 711 transitions. [2022-12-13 15:47:47,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 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 15:47:47,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 514.0) internal successors, (2056), 4 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:47:47,528 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 514.0) internal successors, (2056), 4 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:47:47,529 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 69 flow. Second operand 3 states and 711 transitions. [2022-12-13 15:47:47,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 119 flow [2022-12-13 15:47:47,529 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 15:47:47,530 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 81 flow [2022-12-13 15:47:47,530 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, 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 15:47:47,530 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2022-12-13 15:47:47,530 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 81 flow [2022-12-13 15:47:47,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 0 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 15:47:47,531 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:47,531 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:47:47,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 15:47:47,531 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 15:47:47,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:47,532 INFO L85 PathProgramCache]: Analyzing trace with hash 2034504099, now seen corresponding path program 1 times [2022-12-13 15:47:47,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:47:47,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281491584] [2022-12-13 15:47:47,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:47,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:47:47,571 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:47:47,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563803370] [2022-12-13 15:47:47,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:47,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:47,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:47:47,573 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:47:47,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 15:47:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:47,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 15:47:47,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:47,733 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 15:47:47,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:47:47,749 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 15:47:47,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:47:47,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281491584] [2022-12-13 15:47:47,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:47:47,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563803370] [2022-12-13 15:47:47,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563803370] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:47:47,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:47:47,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-12-13 15:47:47,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606579757] [2022-12-13 15:47:47,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:47:47,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:47:47,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:47:47,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:47:47,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:47:47,773 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 514 [2022-12-13 15:47:47,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 81 flow. Second operand has 6 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 15:47:47,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:47:47,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 514 [2022-12-13 15:47:47,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:47:48,183 INFO L130 PetriNetUnfolder]: 48/120 cut-off events. [2022-12-13 15:47:48,183 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 15:47:48,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 120 events. 48/120 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 290 event pairs, 33 based on Foata normal form. 6/101 useless extension candidates. Maximal degree in co-relation 217. Up to 100 conditions per place. [2022-12-13 15:47:48,184 INFO L137 encePairwiseOnDemand]: 511/514 looper letters, 22 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2022-12-13 15:47:48,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 31 transitions, 147 flow [2022-12-13 15:47:48,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:47:48,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 15:47:48,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1397 transitions. [2022-12-13 15:47:48,188 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45298313878080415 [2022-12-13 15:47:48,189 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1397 transitions. [2022-12-13 15:47:48,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1397 transitions. [2022-12-13 15:47:48,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:47:48,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1397 transitions. [2022-12-13 15:47:48,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 232.83333333333334) internal successors, (1397), 6 states have internal predecessors, (1397), 0 states have call successors, (0), 0 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 15:47:48,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 514.0) internal successors, (3598), 7 states have internal predecessors, (3598), 0 states have call successors, (0), 0 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 15:47:48,200 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 514.0) internal successors, (3598), 7 states have internal predecessors, (3598), 0 states have call successors, (0), 0 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 15:47:48,200 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 81 flow. Second operand 6 states and 1397 transitions. [2022-12-13 15:47:48,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 31 transitions, 147 flow [2022-12-13 15:47:48,201 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 15:47:48,202 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 119 flow [2022-12-13 15:47:48,202 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, 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 15:47:48,203 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 11 predicate places. [2022-12-13 15:47:48,203 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 119 flow [2022-12-13 15:47:48,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 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 15:47:48,204 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:48,204 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:47:48,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:47:48,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:48,405 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 15:47:48,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:48,406 INFO L85 PathProgramCache]: Analyzing trace with hash -36676851, now seen corresponding path program 2 times [2022-12-13 15:47:48,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:47:48,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504928185] [2022-12-13 15:47:48,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:48,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:47:48,458 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:47:48,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151635934] [2022-12-13 15:47:48,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:47:48,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:48,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:47:48,460 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:47:48,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 15:47:48,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:47:48,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:47:48,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 1067 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:47:48,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:48,725 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 15:47:48,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:47:48,771 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 15:47:48,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:47:48,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504928185] [2022-12-13 15:47:48,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:47:48,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151635934] [2022-12-13 15:47:48,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151635934] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:47:48,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:47:48,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-12-13 15:47:48,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450752470] [2022-12-13 15:47:48,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:47:48,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:47:48,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:47:48,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:47:48,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:47:48,802 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 514 [2022-12-13 15:47:48,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 119 flow. Second operand has 12 states, 12 states have (on average 229.41666666666666) internal successors, (2753), 12 states have internal predecessors, (2753), 0 states have call successors, (0), 0 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 15:47:48,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:47:48,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 514 [2022-12-13 15:47:48,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:47:49,505 INFO L130 PetriNetUnfolder]: 48/132 cut-off events. [2022-12-13 15:47:49,506 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2022-12-13 15:47:49,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 132 events. 48/132 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 335 event pairs, 33 based on Foata normal form. 12/119 useless extension candidates. Maximal degree in co-relation 213. Up to 100 conditions per place. [2022-12-13 15:47:49,507 INFO L137 encePairwiseOnDemand]: 511/514 looper letters, 22 selfloop transitions, 11 changer transitions 0/37 dead transitions. [2022-12-13 15:47:49,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 37 transitions, 221 flow [2022-12-13 15:47:49,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:47:49,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 15:47:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2774 transitions. [2022-12-13 15:47:49,518 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4497405966277562 [2022-12-13 15:47:49,519 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2774 transitions. [2022-12-13 15:47:49,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2774 transitions. [2022-12-13 15:47:49,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:47:49,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2774 transitions. [2022-12-13 15:47:49,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 231.16666666666666) internal successors, (2774), 12 states have internal predecessors, (2774), 0 states have call successors, (0), 0 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 15:47:49,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 514.0) internal successors, (6682), 13 states have internal predecessors, (6682), 0 states have call successors, (0), 0 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 15:47:49,539 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 514.0) internal successors, (6682), 13 states have internal predecessors, (6682), 0 states have call successors, (0), 0 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 15:47:49,539 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 119 flow. Second operand 12 states and 2774 transitions. [2022-12-13 15:47:49,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 37 transitions, 221 flow [2022-12-13 15:47:49,540 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 15:47:49,541 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 201 flow [2022-12-13 15:47:49,541 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, 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 15:47:49,542 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 27 predicate places. [2022-12-13 15:47:49,542 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 201 flow [2022-12-13 15:47:49,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 229.41666666666666) internal successors, (2753), 12 states have internal predecessors, (2753), 0 states have call successors, (0), 0 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 15:47:49,542 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:49,543 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:47:49,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 15:47:49,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:49,745 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 15:47:49,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:49,747 INFO L85 PathProgramCache]: Analyzing trace with hash 954839885, now seen corresponding path program 3 times [2022-12-13 15:47:49,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:47:49,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124911683] [2022-12-13 15:47:49,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:49,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:47:49,858 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:47:49,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311302960] [2022-12-13 15:47:49,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:47:49,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:49,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:47:49,859 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:47:49,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 15:47:50,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:47:50,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:47:50,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 15:47:50,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:50,187 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 15:47:50,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:47:50,302 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 15:47:50,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:47:50,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124911683] [2022-12-13 15:47:50,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:47:50,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311302960] [2022-12-13 15:47:50,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311302960] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:47:50,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:47:50,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-12-13 15:47:50,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382404281] [2022-12-13 15:47:50,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:47:50,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:47:50,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:47:50,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:47:50,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:47:50,328 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 514 [2022-12-13 15:47:50,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 201 flow. Second operand has 6 states, 6 states have (on average 230.16666666666666) internal successors, (1381), 6 states have internal predecessors, (1381), 0 states have call successors, (0), 0 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 15:47:50,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:47:50,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 514 [2022-12-13 15:47:50,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:47:50,678 INFO L130 PetriNetUnfolder]: 50/159 cut-off events. [2022-12-13 15:47:50,678 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2022-12-13 15:47:50,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 159 events. 50/159 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 275 event pairs, 33 based on Foata normal form. 3/137 useless extension candidates. Maximal degree in co-relation 310. Up to 94 conditions per place. [2022-12-13 15:47:50,680 INFO L137 encePairwiseOnDemand]: 510/514 looper letters, 66 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2022-12-13 15:47:50,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 694 flow [2022-12-13 15:47:50,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:47:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 15:47:50,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1403 transitions. [2022-12-13 15:47:50,684 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45492866407263294 [2022-12-13 15:47:50,684 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1403 transitions. [2022-12-13 15:47:50,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1403 transitions. [2022-12-13 15:47:50,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:47:50,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1403 transitions. [2022-12-13 15:47:50,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 233.83333333333334) internal successors, (1403), 6 states have internal predecessors, (1403), 0 states have call successors, (0), 0 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 15:47:50,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 514.0) internal successors, (3598), 7 states have internal predecessors, (3598), 0 states have call successors, (0), 0 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 15:47:50,692 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 514.0) internal successors, (3598), 7 states have internal predecessors, (3598), 0 states have call successors, (0), 0 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 15:47:50,692 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 201 flow. Second operand 6 states and 1403 transitions. [2022-12-13 15:47:50,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 694 flow [2022-12-13 15:47:50,696 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 15:47:50,698 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 236 flow [2022-12-13 15:47:50,698 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, 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 15:47:50,698 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2022-12-13 15:47:50,699 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 236 flow [2022-12-13 15:47:50,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 230.16666666666666) internal successors, (1381), 6 states have internal predecessors, (1381), 0 states have call successors, (0), 0 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 15:47:50,699 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:50,700 INFO L209 CegarLoopForPetriNet]: trace histogram [40, 4, 4, 2, 1, 1, 1, 1, 1] [2022-12-13 15:47:50,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 15:47:50,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:50,900 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 15:47:50,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:50,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1175282281, now seen corresponding path program 4 times [2022-12-13 15:47:50,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:47:50,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762148158] [2022-12-13 15:47:50,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:50,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:47:51,237 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:47:51,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009381226] [2022-12-13 15:47:51,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:47:51,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:51,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:47:51,238 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:47:51,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 15:47:52,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:47:52,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:47:52,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 9497 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 15:47:52,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:53,063 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 15:47:53,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:47:53,176 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 15:47:53,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:47:53,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762148158] [2022-12-13 15:47:53,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:47:53,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009381226] [2022-12-13 15:47:53,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009381226] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:47:53,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:47:53,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-12-13 15:47:53,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490526953] [2022-12-13 15:47:53,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:47:53,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 15:47:53,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:47:53,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 15:47:53,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-12-13 15:47:53,227 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 514 [2022-12-13 15:47:53,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 236 flow. Second operand has 24 states, 24 states have (on average 229.33333333333334) internal successors, (5504), 24 states have internal predecessors, (5504), 0 states have call successors, (0), 0 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 15:47:53,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:47:53,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 514 [2022-12-13 15:47:53,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:47:54,667 INFO L130 PetriNetUnfolder]: 50/207 cut-off events. [2022-12-13 15:47:54,667 INFO L131 PetriNetUnfolder]: For 3489/3489 co-relation queries the response was YES. [2022-12-13 15:47:54,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 207 events. 50/207 cut-off events. For 3489/3489 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 275 event pairs, 33 based on Foata normal form. 48/230 useless extension candidates. Maximal degree in co-relation 423. Up to 106 conditions per place. [2022-12-13 15:47:54,668 INFO L137 encePairwiseOnDemand]: 511/514 looper letters, 24 selfloop transitions, 24 changer transitions 0/52 dead transitions. [2022-12-13 15:47:54,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 52 transitions, 404 flow [2022-12-13 15:47:54,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 15:47:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 15:47:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5528 transitions. [2022-12-13 15:47:54,678 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4481193255512322 [2022-12-13 15:47:54,678 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5528 transitions. [2022-12-13 15:47:54,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5528 transitions. [2022-12-13 15:47:54,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:47:54,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5528 transitions. [2022-12-13 15:47:54,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 230.33333333333334) internal successors, (5528), 24 states have internal predecessors, (5528), 0 states have call successors, (0), 0 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 15:47:54,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 514.0) internal successors, (12850), 25 states have internal predecessors, (12850), 0 states have call successors, (0), 0 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 15:47:54,701 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 514.0) internal successors, (12850), 25 states have internal predecessors, (12850), 0 states have call successors, (0), 0 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 15:47:54,702 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 236 flow. Second operand 24 states and 5528 transitions. [2022-12-13 15:47:54,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 52 transitions, 404 flow [2022-12-13 15:47:54,706 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 15:47:54,708 INFO L231 Difference]: Finished difference. Result has 90 places, 52 transitions, 470 flow [2022-12-13 15:47:54,708 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=514, 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 15:47:54,709 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 65 predicate places. [2022-12-13 15:47:54,709 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 52 transitions, 470 flow [2022-12-13 15:47:54,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 229.33333333333334) internal successors, (5504), 24 states have internal predecessors, (5504), 0 states have call successors, (0), 0 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 15:47:54,712 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:47:54,712 INFO L209 CegarLoopForPetriNet]: trace histogram [88, 4, 4, 2, 1, 1, 1, 1, 1] [2022-12-13 15:47:54,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 15:47:54,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:54,914 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 15:47:54,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:54,915 INFO L85 PathProgramCache]: Analyzing trace with hash 794616215, now seen corresponding path program 5 times [2022-12-13 15:47:54,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:47:54,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537772648] [2022-12-13 15:47:54,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:54,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:47:55,633 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:47:55,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720045512] [2022-12-13 15:47:55,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:47:55,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:55,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:47:55,634 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:47:55,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e7697f-1ce3-47bf-961a-4f599b02a824/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process