./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/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_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/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_9d2f3946-0799-45f8-9550-d0a3a924aab9/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 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df --- 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 18:14:51,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:14:51,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:14:51,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:14:51,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:14:51,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:14:51,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:14:51,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:14:51,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:14:51,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:14:51,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:14:51,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:14:51,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:14:51,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:14:51,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:14:51,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:14:51,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:14:51,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:14:51,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:14:51,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:14:51,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:14:51,193 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:14:51,194 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:14:51,195 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:14:51,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:14:51,198 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:14:51,199 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:14:51,200 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:14:51,200 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:14:51,201 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:14:51,201 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:14:51,202 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:14:51,203 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:14:51,203 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:14:51,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:14:51,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:14:51,205 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:14:51,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:14:51,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:14:51,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:14:51,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:14:51,208 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 18:14:51,227 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:14:51,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:14:51,228 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:14:51,228 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:14:51,228 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:14:51,229 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:14:51,235 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:14:51,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:14:51,235 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:14:51,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:14:51,236 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:14:51,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:14:51,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:14:51,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:14:51,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 18:14:51,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:14:51,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 18:14:51,237 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:14:51,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 18:14:51,237 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:14:51,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 18:14:51,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:14:51,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:14:51,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:14:51,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:14:51,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:14:51,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:14:51,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 18:14:51,239 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:14:51,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:14:51,239 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:14:51,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 18:14:51,240 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:14:51,240 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:14:51,240 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:14:51,240 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_9d2f3946-0799-45f8-9550-d0a3a924aab9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df [2022-12-13 18:14:51,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:14:51,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:14:51,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:14:51,432 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:14:51,432 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:14:51,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2022-12-13 18:14:54,053 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:14:54,197 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:14:54,198 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2022-12-13 18:14:54,203 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/data/929047b20/4bbbdef544f149b1b1e4c47f075b51f8/FLAG76cf244a5 [2022-12-13 18:14:54,214 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/data/929047b20/4bbbdef544f149b1b1e4c47f075b51f8 [2022-12-13 18:14:54,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:14:54,217 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:14:54,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:14:54,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:14:54,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:14:54,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:14:54" (1/1) ... [2022-12-13 18:14:54,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f37547b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:14:54, skipping insertion in model container [2022-12-13 18:14:54,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:14:54" (1/1) ... [2022-12-13 18:14:54,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:14:54,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:14:54,355 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:14:54,356 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:14:54,357 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:14:54,358 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:14:54,360 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:14:54,361 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:14:54,366 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_9d2f3946-0799-45f8-9550-d0a3a924aab9/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2022-12-13 18:14:54,372 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:14:54,379 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:14:54,389 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:14:54,390 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:14:54,390 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:14:54,390 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:14:54,391 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:14:54,392 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:14:54,395 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_9d2f3946-0799-45f8-9550-d0a3a924aab9/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2022-12-13 18:14:54,397 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:14:54,407 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:14:54,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:14:54 WrapperNode [2022-12-13 18:14:54,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:14:54,408 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:14:54,408 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:14:54,408 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:14:54,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:14:54" (1/1) ... [2022-12-13 18:14:54,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:14:54" (1/1) ... [2022-12-13 18:14:54,436 INFO L138 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 154 [2022-12-13 18:14:54,436 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:14:54,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:14:54,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:14:54,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:14:54,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:14:54" (1/1) ... [2022-12-13 18:14:54,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:14:54" (1/1) ... [2022-12-13 18:14:54,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:14:54" (1/1) ... [2022-12-13 18:14:54,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:14:54" (1/1) ... [2022-12-13 18:14:54,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:14:54" (1/1) ... [2022-12-13 18:14:54,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:14:54" (1/1) ... [2022-12-13 18:14:54,454 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:14:54" (1/1) ... [2022-12-13 18:14:54,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:14:54" (1/1) ... [2022-12-13 18:14:54,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:14:54,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:14:54,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:14:54,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:14:54,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:14:54" (1/1) ... [2022-12-13 18:14:54,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:14:54,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:14:54,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:14:54,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:14:54,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:14:54,517 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 18:14:54,517 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 18:14:54,517 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 18:14:54,517 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 18:14:54,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 18:14:54,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 18:14:54,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 18:14:54,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 18:14:54,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 18:14:54,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 18:14:54,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:14:54,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:14:54,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 18:14:54,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 18:14:54,519 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 18:14:54,600 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:14:54,601 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:14:54,813 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:14:54,889 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:14:54,889 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 18:14:54,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:14:54 BoogieIcfgContainer [2022-12-13 18:14:54,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:14:54,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:14:54,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:14:54,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:14:54,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:14:54" (1/3) ... [2022-12-13 18:14:54,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f782971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:14:54, skipping insertion in model container [2022-12-13 18:14:54,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:14:54" (2/3) ... [2022-12-13 18:14:54,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f782971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:14:54, skipping insertion in model container [2022-12-13 18:14:54,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:14:54" (3/3) ... [2022-12-13 18:14:54,897 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2022-12-13 18:14:54,904 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 18:14:54,912 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:14:54,912 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 18:14:54,912 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 18:14:54,952 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 18:14:54,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 136 transitions, 288 flow [2022-12-13 18:14:55,021 INFO L130 PetriNetUnfolder]: 11/134 cut-off events. [2022-12-13 18:14:55,021 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 18:14:55,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 134 events. 11/134 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 69 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 99. Up to 3 conditions per place. [2022-12-13 18:14:55,025 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 136 transitions, 288 flow [2022-12-13 18:14:55,028 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 125 transitions, 262 flow [2022-12-13 18:14:55,031 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:14:55,039 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 125 transitions, 262 flow [2022-12-13 18:14:55,041 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 125 transitions, 262 flow [2022-12-13 18:14:55,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 125 transitions, 262 flow [2022-12-13 18:14:55,068 INFO L130 PetriNetUnfolder]: 11/125 cut-off events. [2022-12-13 18:14:55,069 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 18:14:55,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 125 events. 11/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 99. Up to 3 conditions per place. [2022-12-13 18:14:55,071 INFO L119 LiptonReduction]: Number of co-enabled transitions 538 [2022-12-13 18:14:58,384 INFO L134 LiptonReduction]: Checked pairs total: 668 [2022-12-13 18:14:58,385 INFO L136 LiptonReduction]: Total number of compositions: 135 [2022-12-13 18:14:58,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:14:58,400 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;@27f3f6d9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:14:58,401 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 18:14:58,404 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-12-13 18:14:58,404 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 18:14:58,404 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:14:58,405 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:14:58,405 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:14:58,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:58,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1060669552, now seen corresponding path program 1 times [2022-12-13 18:14:58,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:58,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324098101] [2022-12-13 18:14:58,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:58,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:14:58,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:58,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324098101] [2022-12-13 18:14:58,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324098101] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:58,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:14:58,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:14:58,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067575924] [2022-12-13 18:14:58,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:58,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:14:58,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:58,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:14:58,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:14:58,775 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 271 [2022-12-13 18:14:58,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 18:14:58,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:14:58,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 271 [2022-12-13 18:14:58,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:14:58,843 INFO L130 PetriNetUnfolder]: 45/87 cut-off events. [2022-12-13 18:14:58,843 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 18:14:58,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 87 events. 45/87 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 208 event pairs, 18 based on Foata normal form. 5/64 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2022-12-13 18:14:58,845 INFO L137 encePairwiseOnDemand]: 264/271 looper letters, 14 selfloop transitions, 2 changer transitions 5/23 dead transitions. [2022-12-13 18:14:58,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 23 transitions, 106 flow [2022-12-13 18:14:58,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:14:58,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:14:58,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 481 transitions. [2022-12-13 18:14:58,856 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4437269372693727 [2022-12-13 18:14:58,856 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 481 transitions. [2022-12-13 18:14:58,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 481 transitions. [2022-12-13 18:14:58,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:14:58,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 481 transitions. [2022-12-13 18:14:58,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 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 18:14:58,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 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 18:14:58,867 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 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 18:14:58,869 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 4 states and 481 transitions. [2022-12-13 18:14:58,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 23 transitions, 106 flow [2022-12-13 18:14:58,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 23 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 18:14:58,872 INFO L231 Difference]: Finished difference. Result has 22 places, 18 transitions, 58 flow [2022-12-13 18:14:58,873 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=18} [2022-12-13 18:14:58,876 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2022-12-13 18:14:58,876 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 18 transitions, 58 flow [2022-12-13 18:14:58,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 18:14:58,876 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:14:58,877 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:14:58,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 18:14:58,877 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:14:58,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:58,877 INFO L85 PathProgramCache]: Analyzing trace with hash -797223049, now seen corresponding path program 1 times [2022-12-13 18:14:58,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:58,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902138696] [2022-12-13 18:14:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:58,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:59,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:14:59,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:59,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902138696] [2022-12-13 18:14:59,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902138696] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:59,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:14:59,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 18:14:59,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847442588] [2022-12-13 18:14:59,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:59,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:14:59,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:59,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:14:59,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:14:59,168 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 271 [2022-12-13 18:14:59,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 58 flow. Second operand has 6 states, 6 states have (on average 115.33333333333333) internal successors, (692), 6 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 18:14:59,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:14:59,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 271 [2022-12-13 18:14:59,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:14:59,284 INFO L130 PetriNetUnfolder]: 72/136 cut-off events. [2022-12-13 18:14:59,284 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-12-13 18:14:59,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 136 events. 72/136 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 415 event pairs, 15 based on Foata normal form. 1/98 useless extension candidates. Maximal degree in co-relation 350. Up to 77 conditions per place. [2022-12-13 18:14:59,286 INFO L137 encePairwiseOnDemand]: 264/271 looper letters, 32 selfloop transitions, 8 changer transitions 2/43 dead transitions. [2022-12-13 18:14:59,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 43 transitions, 218 flow [2022-12-13 18:14:59,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:14:59,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 18:14:59,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 720 transitions. [2022-12-13 18:14:59,291 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44280442804428044 [2022-12-13 18:14:59,291 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 720 transitions. [2022-12-13 18:14:59,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 720 transitions. [2022-12-13 18:14:59,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:14:59,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 720 transitions. [2022-12-13 18:14:59,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 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 18:14:59,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 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 18:14:59,296 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 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 18:14:59,296 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 58 flow. Second operand 6 states and 720 transitions. [2022-12-13 18:14:59,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 43 transitions, 218 flow [2022-12-13 18:14:59,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 43 transitions, 214 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 18:14:59,297 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 112 flow [2022-12-13 18:14:59,298 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=112, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2022-12-13 18:14:59,298 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2022-12-13 18:14:59,298 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 112 flow [2022-12-13 18:14:59,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 115.33333333333333) internal successors, (692), 6 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 18:14:59,299 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:14:59,299 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:14:59,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 18:14:59,299 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:14:59,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:59,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1081900864, now seen corresponding path program 1 times [2022-12-13 18:14:59,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:59,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52889775] [2022-12-13 18:14:59,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:59,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:14:59,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:59,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52889775] [2022-12-13 18:14:59,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52889775] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:59,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:14:59,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:14:59,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037418122] [2022-12-13 18:14:59,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:59,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:14:59,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:59,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:14:59,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:14:59,402 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 271 [2022-12-13 18:14:59,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 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 18:14:59,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:14:59,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 271 [2022-12-13 18:14:59,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:14:59,479 INFO L130 PetriNetUnfolder]: 87/181 cut-off events. [2022-12-13 18:14:59,479 INFO L131 PetriNetUnfolder]: For 120/122 co-relation queries the response was YES. [2022-12-13 18:14:59,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 181 events. 87/181 cut-off events. For 120/122 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 612 event pairs, 12 based on Foata normal form. 20/173 useless extension candidates. Maximal degree in co-relation 577. Up to 109 conditions per place. [2022-12-13 18:14:59,481 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 30 selfloop transitions, 9 changer transitions 2/43 dead transitions. [2022-12-13 18:14:59,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 43 transitions, 262 flow [2022-12-13 18:14:59,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:14:59,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:14:59,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 501 transitions. [2022-12-13 18:14:59,484 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4621771217712177 [2022-12-13 18:14:59,484 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 501 transitions. [2022-12-13 18:14:59,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 501 transitions. [2022-12-13 18:14:59,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:14:59,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 501 transitions. [2022-12-13 18:14:59,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 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 18:14:59,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 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 18:14:59,489 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 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 18:14:59,489 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 112 flow. Second operand 4 states and 501 transitions. [2022-12-13 18:14:59,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 43 transitions, 262 flow [2022-12-13 18:14:59,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 43 transitions, 249 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-13 18:14:59,491 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 165 flow [2022-12-13 18:14:59,491 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2022-12-13 18:14:59,492 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2022-12-13 18:14:59,492 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 165 flow [2022-12-13 18:14:59,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 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 18:14:59,493 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:14:59,493 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:14:59,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 18:14:59,493 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:14:59,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:59,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1644013872, now seen corresponding path program 1 times [2022-12-13 18:14:59,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:59,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646689187] [2022-12-13 18:14:59,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:59,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:59,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:14:59,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:59,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646689187] [2022-12-13 18:14:59,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646689187] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:14:59,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513795736] [2022-12-13 18:14:59,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:59,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:59,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:14:59,638 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:14:59,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 18:14:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:59,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 18:14:59,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:14:59,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:14:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:14:59,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513795736] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:14:59,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:14:59,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-13 18:14:59,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616350110] [2022-12-13 18:14:59,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:14:59,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:14:59,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:59,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:14:59,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:14:59,935 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 271 [2022-12-13 18:14:59,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 165 flow. Second operand has 12 states, 12 states have (on average 112.0) internal successors, (1344), 12 states have internal predecessors, (1344), 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 18:14:59,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:14:59,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 271 [2022-12-13 18:14:59,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:00,066 INFO L130 PetriNetUnfolder]: 82/182 cut-off events. [2022-12-13 18:15:00,067 INFO L131 PetriNetUnfolder]: For 312/317 co-relation queries the response was YES. [2022-12-13 18:15:00,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758 conditions, 182 events. 82/182 cut-off events. For 312/317 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 604 event pairs, 36 based on Foata normal form. 13/166 useless extension candidates. Maximal degree in co-relation 733. Up to 158 conditions per place. [2022-12-13 18:15:00,068 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 23 selfloop transitions, 3 changer transitions 11/39 dead transitions. [2022-12-13 18:15:00,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 39 transitions, 290 flow [2022-12-13 18:15:00,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:15:00,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 18:15:00,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 690 transitions. [2022-12-13 18:15:00,070 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42435424354243545 [2022-12-13 18:15:00,070 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 690 transitions. [2022-12-13 18:15:00,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 690 transitions. [2022-12-13 18:15:00,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:00,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 690 transitions. [2022-12-13 18:15:00,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 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 18:15:00,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 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 18:15:00,074 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 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 18:15:00,074 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 165 flow. Second operand 6 states and 690 transitions. [2022-12-13 18:15:00,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 39 transitions, 290 flow [2022-12-13 18:15:00,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 39 transitions, 262 flow, removed 14 selfloop flow, removed 1 redundant places. [2022-12-13 18:15:00,076 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 167 flow [2022-12-13 18:15:00,076 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=167, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2022-12-13 18:15:00,076 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2022-12-13 18:15:00,077 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 167 flow [2022-12-13 18:15:00,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 112.0) internal successors, (1344), 12 states have internal predecessors, (1344), 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 18:15:00,077 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:00,077 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:00,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:15:00,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:00,278 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:15:00,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:00,279 INFO L85 PathProgramCache]: Analyzing trace with hash -610984373, now seen corresponding path program 2 times [2022-12-13 18:15:00,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:00,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475143146] [2022-12-13 18:15:00,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:00,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:00,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:00,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:00,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475143146] [2022-12-13 18:15:00,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475143146] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:15:00,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496573836] [2022-12-13 18:15:00,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:15:00,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:00,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:15:00,815 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:15:00,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 18:15:00,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:15:00,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:15:00,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 18:15:00,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:01,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:15:01,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 18:15:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:01,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:15:01,324 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:01,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-12-13 18:15:01,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-12-13 18:15:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:01,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496573836] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:15:01,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:15:01,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-12-13 18:15:01,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811812548] [2022-12-13 18:15:01,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:15:01,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 18:15:01,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:15:01,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 18:15:01,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-12-13 18:15:02,272 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 271 [2022-12-13 18:15:02,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 167 flow. Second operand has 23 states, 23 states have (on average 100.6086956521739) internal successors, (2314), 23 states have internal predecessors, (2314), 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 18:15:02,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:15:02,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 271 [2022-12-13 18:15:02,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:03,335 INFO L130 PetriNetUnfolder]: 233/438 cut-off events. [2022-12-13 18:15:03,336 INFO L131 PetriNetUnfolder]: For 746/754 co-relation queries the response was YES. [2022-12-13 18:15:03,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1768 conditions, 438 events. 233/438 cut-off events. For 746/754 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1756 event pairs, 14 based on Foata normal form. 34/391 useless extension candidates. Maximal degree in co-relation 1742. Up to 212 conditions per place. [2022-12-13 18:15:03,338 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 74 selfloop transitions, 50 changer transitions 0/126 dead transitions. [2022-12-13 18:15:03,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 126 transitions, 927 flow [2022-12-13 18:15:03,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 18:15:03,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 18:15:03,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1886 transitions. [2022-12-13 18:15:03,342 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38663386633866337 [2022-12-13 18:15:03,342 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1886 transitions. [2022-12-13 18:15:03,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1886 transitions. [2022-12-13 18:15:03,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:03,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1886 transitions. [2022-12-13 18:15:03,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 104.77777777777777) internal successors, (1886), 18 states have internal predecessors, (1886), 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 18:15:03,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 271.0) internal successors, (5149), 19 states have internal predecessors, (5149), 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 18:15:03,349 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 271.0) internal successors, (5149), 19 states have internal predecessors, (5149), 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 18:15:03,349 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 167 flow. Second operand 18 states and 1886 transitions. [2022-12-13 18:15:03,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 126 transitions, 927 flow [2022-12-13 18:15:03,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 126 transitions, 885 flow, removed 19 selfloop flow, removed 4 redundant places. [2022-12-13 18:15:03,353 INFO L231 Difference]: Finished difference. Result has 50 places, 83 transitions, 698 flow [2022-12-13 18:15:03,353 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=698, PETRI_PLACES=50, PETRI_TRANSITIONS=83} [2022-12-13 18:15:03,353 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2022-12-13 18:15:03,353 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 83 transitions, 698 flow [2022-12-13 18:15:03,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 100.6086956521739) internal successors, (2314), 23 states have internal predecessors, (2314), 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 18:15:03,354 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:03,354 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:03,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 18:15:03,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:03,555 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:15:03,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:03,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1582601158, now seen corresponding path program 3 times [2022-12-13 18:15:03,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:03,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218185742] [2022-12-13 18:15:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:03,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:04,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:04,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218185742] [2022-12-13 18:15:04,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218185742] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:15:04,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059325020] [2022-12-13 18:15:04,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:15:04,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:04,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:15:04,162 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:15:04,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 18:15:04,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 18:15:04,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:15:04,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 18:15:04,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:15:04,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:15:04,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059325020] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:15:04,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:15:04,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2022-12-13 18:15:04,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447866850] [2022-12-13 18:15:04,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:15:04,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:15:04,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:15:04,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:15:04,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-12-13 18:15:04,321 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 271 [2022-12-13 18:15:04,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 83 transitions, 698 flow. Second operand has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 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 18:15:04,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:15:04,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 271 [2022-12-13 18:15:04,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:04,432 INFO L130 PetriNetUnfolder]: 284/528 cut-off events. [2022-12-13 18:15:04,432 INFO L131 PetriNetUnfolder]: For 1192/1195 co-relation queries the response was YES. [2022-12-13 18:15:04,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2434 conditions, 528 events. 284/528 cut-off events. For 1192/1195 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2216 event pairs, 18 based on Foata normal form. 13/447 useless extension candidates. Maximal degree in co-relation 2099. Up to 405 conditions per place. [2022-12-13 18:15:04,435 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 94 selfloop transitions, 12 changer transitions 0/108 dead transitions. [2022-12-13 18:15:04,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 108 transitions, 1088 flow [2022-12-13 18:15:04,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:15:04,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:15:04,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 471 transitions. [2022-12-13 18:15:04,436 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4345018450184502 [2022-12-13 18:15:04,436 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 471 transitions. [2022-12-13 18:15:04,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 471 transitions. [2022-12-13 18:15:04,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:04,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 471 transitions. [2022-12-13 18:15:04,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 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 18:15:04,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 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 18:15:04,438 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 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 18:15:04,438 INFO L175 Difference]: Start difference. First operand has 50 places, 83 transitions, 698 flow. Second operand 4 states and 471 transitions. [2022-12-13 18:15:04,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 108 transitions, 1088 flow [2022-12-13 18:15:04,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 108 transitions, 852 flow, removed 114 selfloop flow, removed 5 redundant places. [2022-12-13 18:15:04,445 INFO L231 Difference]: Finished difference. Result has 49 places, 90 transitions, 610 flow [2022-12-13 18:15:04,445 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=610, PETRI_PLACES=49, PETRI_TRANSITIONS=90} [2022-12-13 18:15:04,445 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2022-12-13 18:15:04,445 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 90 transitions, 610 flow [2022-12-13 18:15:04,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 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 18:15:04,446 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:04,446 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:04,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 18:15:04,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:04,646 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:15:04,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:04,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1699745506, now seen corresponding path program 4 times [2022-12-13 18:15:04,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:04,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306635641] [2022-12-13 18:15:04,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:04,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:05,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:05,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306635641] [2022-12-13 18:15:05,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306635641] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:15:05,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376586029] [2022-12-13 18:15:05,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:15:05,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:05,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:15:05,633 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:15:05,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 18:15:05,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:15:05,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:15:05,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 18:15:05,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:05,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:15:05,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 18:15:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:15:05,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:15:05,922 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:05,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-12-13 18:15:05,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-12-13 18:15:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:15:05,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376586029] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 18:15:05,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:15:05,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 7] total 20 [2022-12-13 18:15:05,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512060012] [2022-12-13 18:15:05,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:15:05,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:15:05,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:15:05,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:15:05,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=359, Unknown=3, NotChecked=0, Total=420 [2022-12-13 18:15:06,059 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 271 [2022-12-13 18:15:06,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 90 transitions, 610 flow. Second operand has 6 states, 6 states have (on average 106.33333333333333) internal successors, (638), 6 states have internal predecessors, (638), 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 18:15:06,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:15:06,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 271 [2022-12-13 18:15:06,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:06,203 INFO L130 PetriNetUnfolder]: 286/532 cut-off events. [2022-12-13 18:15:06,203 INFO L131 PetriNetUnfolder]: For 1076/1084 co-relation queries the response was YES. [2022-12-13 18:15:06,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2158 conditions, 532 events. 286/532 cut-off events. For 1076/1084 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2242 event pairs, 18 based on Foata normal form. 8/458 useless extension candidates. Maximal degree in co-relation 1898. Up to 375 conditions per place. [2022-12-13 18:15:06,206 INFO L137 encePairwiseOnDemand]: 265/271 looper letters, 101 selfloop transitions, 19 changer transitions 0/122 dead transitions. [2022-12-13 18:15:06,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 122 transitions, 1090 flow [2022-12-13 18:15:06,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:15:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:15:06,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 442 transitions. [2022-12-13 18:15:06,208 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4077490774907749 [2022-12-13 18:15:06,208 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 442 transitions. [2022-12-13 18:15:06,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 442 transitions. [2022-12-13 18:15:06,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:06,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 442 transitions. [2022-12-13 18:15:06,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 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 18:15:06,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 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 18:15:06,210 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 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 18:15:06,210 INFO L175 Difference]: Start difference. First operand has 49 places, 90 transitions, 610 flow. Second operand 4 states and 442 transitions. [2022-12-13 18:15:06,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 122 transitions, 1090 flow [2022-12-13 18:15:06,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 122 transitions, 1067 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 18:15:06,214 INFO L231 Difference]: Finished difference. Result has 51 places, 105 transitions, 829 flow [2022-12-13 18:15:06,214 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=829, PETRI_PLACES=51, PETRI_TRANSITIONS=105} [2022-12-13 18:15:06,215 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2022-12-13 18:15:06,215 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 105 transitions, 829 flow [2022-12-13 18:15:06,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 106.33333333333333) internal successors, (638), 6 states have internal predecessors, (638), 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 18:15:06,216 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:06,216 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:06,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 18:15:06,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 18:15:06,417 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:15:06,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:06,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1890378136, now seen corresponding path program 1 times [2022-12-13 18:15:06,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:06,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417335728] [2022-12-13 18:15:06,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:06,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:06,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:06,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417335728] [2022-12-13 18:15:06,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417335728] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:15:06,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354759488] [2022-12-13 18:15:06,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:06,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:06,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:15:06,897 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:15:06,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 18:15:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:06,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 18:15:06,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:06,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 18:15:07,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 18:15:07,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 18:15:07,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 18:15:07,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-13 18:15:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:07,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:15:07,896 INFO L321 Elim1Store]: treesize reduction 40, result has 62.6 percent of original size [2022-12-13 18:15:07,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 225 treesize of output 187 [2022-12-13 18:15:07,933 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:07,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 447 treesize of output 451 [2022-12-13 18:15:07,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:07,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 401 treesize of output 396 [2022-12-13 18:15:07,972 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:07,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 383 treesize of output 360 [2022-12-13 18:15:07,994 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:07,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 367 treesize of output 379 [2022-12-13 18:15:08,013 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:08,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 329 treesize of output 324 [2022-12-13 18:15:08,031 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:08,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 311 treesize of output 288 [2022-12-13 18:15:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:10,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354759488] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:15:10,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:15:10,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2022-12-13 18:15:10,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847284712] [2022-12-13 18:15:10,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:15:10,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 18:15:10,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:15:10,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 18:15:10,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=619, Unknown=4, NotChecked=0, Total=756 [2022-12-13 18:15:10,889 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 271 [2022-12-13 18:15:10,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 105 transitions, 829 flow. Second operand has 28 states, 28 states have (on average 75.71428571428571) internal successors, (2120), 28 states have internal predecessors, (2120), 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 18:15:10,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:15:10,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 271 [2022-12-13 18:15:10,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:13,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:15:16,199 INFO L130 PetriNetUnfolder]: 463/876 cut-off events. [2022-12-13 18:15:16,199 INFO L131 PetriNetUnfolder]: For 1913/1913 co-relation queries the response was YES. [2022-12-13 18:15:16,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3733 conditions, 876 events. 463/876 cut-off events. For 1913/1913 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4438 event pairs, 26 based on Foata normal form. 3/769 useless extension candidates. Maximal degree in co-relation 3378. Up to 499 conditions per place. [2022-12-13 18:15:16,203 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 155 selfloop transitions, 115 changer transitions 8/279 dead transitions. [2022-12-13 18:15:16,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 279 transitions, 2452 flow [2022-12-13 18:15:16,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 18:15:16,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-13 18:15:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2677 transitions. [2022-12-13 18:15:16,210 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2905361406555242 [2022-12-13 18:15:16,210 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2677 transitions. [2022-12-13 18:15:16,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2677 transitions. [2022-12-13 18:15:16,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:16,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2677 transitions. [2022-12-13 18:15:16,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 78.73529411764706) internal successors, (2677), 34 states have internal predecessors, (2677), 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 18:15:16,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 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 18:15:16,223 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 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 18:15:16,223 INFO L175 Difference]: Start difference. First operand has 51 places, 105 transitions, 829 flow. Second operand 34 states and 2677 transitions. [2022-12-13 18:15:16,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 279 transitions, 2452 flow [2022-12-13 18:15:16,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 279 transitions, 2394 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 18:15:16,231 INFO L231 Difference]: Finished difference. Result has 91 places, 199 transitions, 1939 flow [2022-12-13 18:15:16,231 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1939, PETRI_PLACES=91, PETRI_TRANSITIONS=199} [2022-12-13 18:15:16,232 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 70 predicate places. [2022-12-13 18:15:16,232 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 199 transitions, 1939 flow [2022-12-13 18:15:16,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 75.71428571428571) internal successors, (2120), 28 states have internal predecessors, (2120), 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 18:15:16,233 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:16,233 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:16,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 18:15:16,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:16,434 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:15:16,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:16,434 INFO L85 PathProgramCache]: Analyzing trace with hash -847537704, now seen corresponding path program 2 times [2022-12-13 18:15:16,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:16,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274066316] [2022-12-13 18:15:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:16,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:17,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:17,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274066316] [2022-12-13 18:15:17,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274066316] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:15:17,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310677833] [2022-12-13 18:15:17,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:15:17,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:17,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:15:17,035 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:15:17,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 18:15:17,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:15:17,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:15:17,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-13 18:15:17,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:17,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 18:15:17,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 18:15:17,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 18:15:17,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 18:15:17,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2022-12-13 18:15:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:17,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:15:18,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:18,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 63 [2022-12-13 18:15:18,105 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:18,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 144 [2022-12-13 18:15:18,117 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:18,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 101 [2022-12-13 18:15:18,125 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:18,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 108 [2022-12-13 18:15:18,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:18,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 63 [2022-12-13 18:15:18,398 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-13 18:15:18,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 288 [2022-12-13 18:15:18,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:15:18,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 188 [2022-12-13 18:15:18,420 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-13 18:15:18,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 260 treesize of output 216 [2022-12-13 18:15:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:18,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310677833] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:15:18,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:15:18,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2022-12-13 18:15:18,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224838951] [2022-12-13 18:15:18,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:15:18,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 18:15:18,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:15:18,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 18:15:18,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=620, Unknown=3, NotChecked=0, Total=756 [2022-12-13 18:15:18,988 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 271 [2022-12-13 18:15:18,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 199 transitions, 1939 flow. Second operand has 28 states, 28 states have (on average 75.67857142857143) internal successors, (2119), 28 states have internal predecessors, (2119), 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 18:15:18,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:15:18,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 271 [2022-12-13 18:15:18,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:22,415 INFO L130 PetriNetUnfolder]: 604/1147 cut-off events. [2022-12-13 18:15:22,415 INFO L131 PetriNetUnfolder]: For 3561/3561 co-relation queries the response was YES. [2022-12-13 18:15:22,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5588 conditions, 1147 events. 604/1147 cut-off events. For 3561/3561 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6326 event pairs, 34 based on Foata normal form. 5/1071 useless extension candidates. Maximal degree in co-relation 5522. Up to 526 conditions per place. [2022-12-13 18:15:22,421 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 180 selfloop transitions, 153 changer transitions 26/360 dead transitions. [2022-12-13 18:15:22,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 360 transitions, 3652 flow [2022-12-13 18:15:22,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 18:15:22,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-12-13 18:15:22,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3237 transitions. [2022-12-13 18:15:22,426 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2913329133291333 [2022-12-13 18:15:22,426 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3237 transitions. [2022-12-13 18:15:22,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3237 transitions. [2022-12-13 18:15:22,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:22,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3237 transitions. [2022-12-13 18:15:22,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 78.95121951219512) internal successors, (3237), 41 states have internal predecessors, (3237), 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 18:15:22,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 271.0) internal successors, (11382), 42 states have internal predecessors, (11382), 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 18:15:22,440 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 271.0) internal successors, (11382), 42 states have internal predecessors, (11382), 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 18:15:22,440 INFO L175 Difference]: Start difference. First operand has 91 places, 199 transitions, 1939 flow. Second operand 41 states and 3237 transitions. [2022-12-13 18:15:22,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 360 transitions, 3652 flow [2022-12-13 18:15:22,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 360 transitions, 3527 flow, removed 55 selfloop flow, removed 7 redundant places. [2022-12-13 18:15:22,455 INFO L231 Difference]: Finished difference. Result has 134 places, 243 transitions, 2712 flow [2022-12-13 18:15:22,455 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1832, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=2712, PETRI_PLACES=134, PETRI_TRANSITIONS=243} [2022-12-13 18:15:22,456 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 113 predicate places. [2022-12-13 18:15:22,456 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 243 transitions, 2712 flow [2022-12-13 18:15:22,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 75.67857142857143) internal successors, (2119), 28 states have internal predecessors, (2119), 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 18:15:22,457 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:22,457 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:22,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 18:15:22,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:22,659 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:15:22,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:22,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1603910080, now seen corresponding path program 3 times [2022-12-13 18:15:22,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:22,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270349552] [2022-12-13 18:15:22,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:22,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:23,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:23,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270349552] [2022-12-13 18:15:23,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270349552] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:15:23,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943118609] [2022-12-13 18:15:23,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:15:23,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:23,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:15:23,619 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:15:23,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 18:15:23,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 18:15:23,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:15:23,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 18:15:23,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:23,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:15:23,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-12-13 18:15:24,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-13 18:15:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:24,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:15:24,222 WARN L837 $PredicateComparison]: unable to prove that (or (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (forall ((v_ArrVal_300 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_300) c_~q~0.base) .cse0)) (+ c_~N~0 1))) (forall ((v_ArrVal_300 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_300) c_~q~0.base) .cse0)))))) (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0)) is different from false [2022-12-13 18:15:24,242 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:24,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 74 [2022-12-13 18:15:24,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2022-12-13 18:15:24,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2022-12-13 18:15:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:24,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943118609] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:15:24,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:15:24,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2022-12-13 18:15:24,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104658854] [2022-12-13 18:15:24,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:15:24,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 18:15:24,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:15:24,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 18:15:24,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=660, Unknown=1, NotChecked=52, Total=812 [2022-12-13 18:15:24,632 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 271 [2022-12-13 18:15:24,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 243 transitions, 2712 flow. Second operand has 29 states, 29 states have (on average 78.65517241379311) internal successors, (2281), 29 states have internal predecessors, (2281), 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 18:15:24,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:15:24,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 271 [2022-12-13 18:15:24,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:26,561 INFO L130 PetriNetUnfolder]: 698/1324 cut-off events. [2022-12-13 18:15:26,561 INFO L131 PetriNetUnfolder]: For 6041/6041 co-relation queries the response was YES. [2022-12-13 18:15:26,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7181 conditions, 1324 events. 698/1324 cut-off events. For 6041/6041 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7509 event pairs, 41 based on Foata normal form. 5/1269 useless extension candidates. Maximal degree in co-relation 7063. Up to 725 conditions per place. [2022-12-13 18:15:26,569 INFO L137 encePairwiseOnDemand]: 259/271 looper letters, 172 selfloop transitions, 199 changer transitions 8/380 dead transitions. [2022-12-13 18:15:26,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 380 transitions, 4675 flow [2022-12-13 18:15:26,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 18:15:26,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 18:15:26,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1726 transitions. [2022-12-13 18:15:26,572 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.30328589000175715 [2022-12-13 18:15:26,572 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1726 transitions. [2022-12-13 18:15:26,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1726 transitions. [2022-12-13 18:15:26,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:26,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1726 transitions. [2022-12-13 18:15:26,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 82.19047619047619) internal successors, (1726), 21 states have internal predecessors, (1726), 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 18:15:26,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 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 18:15:26,579 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 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 18:15:26,579 INFO L175 Difference]: Start difference. First operand has 134 places, 243 transitions, 2712 flow. Second operand 21 states and 1726 transitions. [2022-12-13 18:15:26,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 380 transitions, 4675 flow [2022-12-13 18:15:26,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 380 transitions, 4513 flow, removed 44 selfloop flow, removed 21 redundant places. [2022-12-13 18:15:26,609 INFO L231 Difference]: Finished difference. Result has 138 places, 327 transitions, 4204 flow [2022-12-13 18:15:26,609 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=2566, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4204, PETRI_PLACES=138, PETRI_TRANSITIONS=327} [2022-12-13 18:15:26,610 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 117 predicate places. [2022-12-13 18:15:26,610 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 327 transitions, 4204 flow [2022-12-13 18:15:26,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 78.65517241379311) internal successors, (2281), 29 states have internal predecessors, (2281), 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 18:15:26,610 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:26,610 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:26,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 18:15:26,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 18:15:26,812 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:15:26,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:26,813 INFO L85 PathProgramCache]: Analyzing trace with hash 25100100, now seen corresponding path program 4 times [2022-12-13 18:15:26,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:26,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80067291] [2022-12-13 18:15:26,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:26,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:27,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:27,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:27,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80067291] [2022-12-13 18:15:27,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80067291] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:15:27,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471600014] [2022-12-13 18:15:27,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:15:27,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:27,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:15:27,433 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:15:27,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 18:15:27,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:15:27,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:15:27,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-13 18:15:27,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:27,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:15:27,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 18:15:27,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-13 18:15:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:27,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:15:27,982 WARN L837 $PredicateComparison]: unable to prove that (or (not (<= 0 c_~q_back~0)) (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (forall ((v_ArrVal_335 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_335) c_~q~0.base) .cse0)) (+ c_~N~0 1))) (forall ((v_ArrVal_335 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_335) c_~q~0.base) .cse0)))))) (not (< c_~q_back~0 c_~n~0)) (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0)) is different from false [2022-12-13 18:15:28,002 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:28,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 74 [2022-12-13 18:15:28,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2022-12-13 18:15:28,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2022-12-13 18:15:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:28,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471600014] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:15:28,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:15:28,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2022-12-13 18:15:28,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532303436] [2022-12-13 18:15:28,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:15:28,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 18:15:28,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:15:28,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 18:15:28,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=647, Unknown=1, NotChecked=52, Total=812 [2022-12-13 18:15:28,369 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 271 [2022-12-13 18:15:28,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 327 transitions, 4204 flow. Second operand has 29 states, 29 states have (on average 78.62068965517241) internal successors, (2280), 29 states have internal predecessors, (2280), 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 18:15:28,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:15:28,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 271 [2022-12-13 18:15:28,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:33,377 INFO L130 PetriNetUnfolder]: 859/1684 cut-off events. [2022-12-13 18:15:33,377 INFO L131 PetriNetUnfolder]: For 10020/10020 co-relation queries the response was YES. [2022-12-13 18:15:33,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10237 conditions, 1684 events. 859/1684 cut-off events. For 10020/10020 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 10475 event pairs, 44 based on Foata normal form. 6/1629 useless extension candidates. Maximal degree in co-relation 10089. Up to 760 conditions per place. [2022-12-13 18:15:33,387 INFO L137 encePairwiseOnDemand]: 259/271 looper letters, 203 selfloop transitions, 254 changer transitions 28/486 dead transitions. [2022-12-13 18:15:33,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 486 transitions, 6560 flow [2022-12-13 18:15:33,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 18:15:33,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 18:15:33,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2710 transitions. [2022-12-13 18:15:33,391 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.30303030303030304 [2022-12-13 18:15:33,391 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2710 transitions. [2022-12-13 18:15:33,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2710 transitions. [2022-12-13 18:15:33,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:33,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2710 transitions. [2022-12-13 18:15:33,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 82.12121212121212) internal successors, (2710), 33 states have internal predecessors, (2710), 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 18:15:33,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 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 18:15:33,399 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 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 18:15:33,399 INFO L175 Difference]: Start difference. First operand has 138 places, 327 transitions, 4204 flow. Second operand 33 states and 2710 transitions. [2022-12-13 18:15:33,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 486 transitions, 6560 flow [2022-12-13 18:15:33,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 486 transitions, 6463 flow, removed 29 selfloop flow, removed 10 redundant places. [2022-12-13 18:15:33,459 INFO L231 Difference]: Finished difference. Result has 170 places, 387 transitions, 5729 flow [2022-12-13 18:15:33,459 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4113, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5729, PETRI_PLACES=170, PETRI_TRANSITIONS=387} [2022-12-13 18:15:33,460 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 149 predicate places. [2022-12-13 18:15:33,460 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 387 transitions, 5729 flow [2022-12-13 18:15:33,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 78.62068965517241) internal successors, (2280), 29 states have internal predecessors, (2280), 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 18:15:33,460 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:33,460 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:33,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 18:15:33,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:33,662 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:15:33,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:33,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1119493650, now seen corresponding path program 5 times [2022-12-13 18:15:33,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:33,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085783729] [2022-12-13 18:15:33,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:33,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:34,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:34,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085783729] [2022-12-13 18:15:34,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085783729] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:15:34,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145650751] [2022-12-13 18:15:34,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:15:34,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:34,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:15:34,520 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:15:34,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 18:15:34,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 18:15:34,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:15:34,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 18:15:34,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:34,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:15:34,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 18:15:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:15:34,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:15:34,834 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:34,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-12-13 18:15:34,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-12-13 18:15:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:15:34,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145650751] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:15:34,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:15:34,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 20 [2022-12-13 18:15:34,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692824195] [2022-12-13 18:15:34,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:15:34,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 18:15:34,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:15:34,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 18:15:34,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=355, Unknown=4, NotChecked=0, Total=420 [2022-12-13 18:15:35,938 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 271 [2022-12-13 18:15:35,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 387 transitions, 5729 flow. Second operand has 21 states, 21 states have (on average 98.04761904761905) internal successors, (2059), 21 states have internal predecessors, (2059), 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 18:15:35,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:15:35,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 271 [2022-12-13 18:15:35,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:36,925 INFO L130 PetriNetUnfolder]: 895/1730 cut-off events. [2022-12-13 18:15:36,925 INFO L131 PetriNetUnfolder]: For 15979/15979 co-relation queries the response was YES. [2022-12-13 18:15:36,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12295 conditions, 1730 events. 895/1730 cut-off events. For 15979/15979 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 10614 event pairs, 64 based on Foata normal form. 15/1710 useless extension candidates. Maximal degree in co-relation 12166. Up to 1151 conditions per place. [2022-12-13 18:15:36,936 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 312 selfloop transitions, 151 changer transitions 0/464 dead transitions. [2022-12-13 18:15:36,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 464 transitions, 7684 flow [2022-12-13 18:15:36,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 18:15:36,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 18:15:36,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1411 transitions. [2022-12-13 18:15:36,938 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37190300474433313 [2022-12-13 18:15:36,938 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1411 transitions. [2022-12-13 18:15:36,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1411 transitions. [2022-12-13 18:15:36,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:36,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1411 transitions. [2022-12-13 18:15:36,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 100.78571428571429) internal successors, (1411), 14 states have internal predecessors, (1411), 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 18:15:36,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 271.0) internal successors, (4065), 15 states have internal predecessors, (4065), 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 18:15:36,942 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 271.0) internal successors, (4065), 15 states have internal predecessors, (4065), 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 18:15:36,943 INFO L175 Difference]: Start difference. First operand has 170 places, 387 transitions, 5729 flow. Second operand 14 states and 1411 transitions. [2022-12-13 18:15:36,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 464 transitions, 7684 flow [2022-12-13 18:15:37,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 464 transitions, 7497 flow, removed 49 selfloop flow, removed 17 redundant places. [2022-12-13 18:15:37,031 INFO L231 Difference]: Finished difference. Result has 167 places, 422 transitions, 6685 flow [2022-12-13 18:15:37,031 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=5510, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6685, PETRI_PLACES=167, PETRI_TRANSITIONS=422} [2022-12-13 18:15:37,031 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 146 predicate places. [2022-12-13 18:15:37,031 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 422 transitions, 6685 flow [2022-12-13 18:15:37,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 98.04761904761905) internal successors, (2059), 21 states have internal predecessors, (2059), 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 18:15:37,032 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:37,032 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:37,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 18:15:37,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 18:15:37,233 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:15:37,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:37,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1192227095, now seen corresponding path program 5 times [2022-12-13 18:15:37,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:37,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104523208] [2022-12-13 18:15:37,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:37,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:37,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:15:37,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:37,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104523208] [2022-12-13 18:15:37,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104523208] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:15:37,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443186748] [2022-12-13 18:15:37,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:15:37,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:37,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:15:37,360 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:15:37,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 18:15:37,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:15:37,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:15:37,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 18:15:37,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:37,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:15:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:37,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443186748] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:15:37,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:15:37,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 19 [2022-12-13 18:15:37,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918558640] [2022-12-13 18:15:37,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:15:37,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 18:15:37,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:15:37,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 18:15:37,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2022-12-13 18:15:37,786 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 271 [2022-12-13 18:15:37,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 422 transitions, 6685 flow. Second operand has 20 states, 20 states have (on average 110.2) internal successors, (2204), 20 states have internal predecessors, (2204), 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 18:15:37,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:15:37,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 271 [2022-12-13 18:15:37,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:38,459 INFO L130 PetriNetUnfolder]: 851/1778 cut-off events. [2022-12-13 18:15:38,459 INFO L131 PetriNetUnfolder]: For 21044/21048 co-relation queries the response was YES. [2022-12-13 18:15:38,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12681 conditions, 1778 events. 851/1778 cut-off events. For 21044/21048 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 11956 event pairs, 25 based on Foata normal form. 237/1955 useless extension candidates. Maximal degree in co-relation 12584. Up to 663 conditions per place. [2022-12-13 18:15:38,470 INFO L137 encePairwiseOnDemand]: 264/271 looper letters, 174 selfloop transitions, 138 changer transitions 153/474 dead transitions. [2022-12-13 18:15:38,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 474 transitions, 8003 flow [2022-12-13 18:15:38,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 18:15:38,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 18:15:38,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1601 transitions. [2022-12-13 18:15:38,471 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4219820769636268 [2022-12-13 18:15:38,471 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1601 transitions. [2022-12-13 18:15:38,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1601 transitions. [2022-12-13 18:15:38,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:38,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1601 transitions. [2022-12-13 18:15:38,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 114.35714285714286) internal successors, (1601), 14 states have internal predecessors, (1601), 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 18:15:38,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 271.0) internal successors, (4065), 15 states have internal predecessors, (4065), 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 18:15:38,476 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 271.0) internal successors, (4065), 15 states have internal predecessors, (4065), 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 18:15:38,476 INFO L175 Difference]: Start difference. First operand has 167 places, 422 transitions, 6685 flow. Second operand 14 states and 1601 transitions. [2022-12-13 18:15:38,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 474 transitions, 8003 flow [2022-12-13 18:15:38,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 474 transitions, 7524 flow, removed 25 selfloop flow, removed 13 redundant places. [2022-12-13 18:15:38,573 INFO L231 Difference]: Finished difference. Result has 169 places, 269 transitions, 4237 flow [2022-12-13 18:15:38,573 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=5762, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4237, PETRI_PLACES=169, PETRI_TRANSITIONS=269} [2022-12-13 18:15:38,573 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 148 predicate places. [2022-12-13 18:15:38,574 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 269 transitions, 4237 flow [2022-12-13 18:15:38,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 110.2) internal successors, (2204), 20 states have internal predecessors, (2204), 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 18:15:38,574 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:38,574 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:38,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 18:15:38,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:38,776 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:15:38,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:38,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1414311549, now seen corresponding path program 6 times [2022-12-13 18:15:38,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:38,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546893947] [2022-12-13 18:15:38,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:38,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:39,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:39,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546893947] [2022-12-13 18:15:39,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546893947] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:15:39,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284428506] [2022-12-13 18:15:39,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:15:39,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:39,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:15:39,649 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:15:39,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 18:15:39,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 18:15:39,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:15:39,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 18:15:39,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:39,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:15:39,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 18:15:39,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2022-12-13 18:15:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:15:40,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:15:40,072 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (forall ((v_ArrVal_447 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_447) c_~q~0.base) .cse0)) (+ c_~N~0 1))) (forall ((v_ArrVal_447 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_447) c_~q~0.base) .cse0)))))) is different from false [2022-12-13 18:15:40,142 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:40,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 74 [2022-12-13 18:15:40,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2022-12-13 18:15:40,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2022-12-13 18:15:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:15:40,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284428506] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:15:40,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:15:40,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 26 [2022-12-13 18:15:40,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692755642] [2022-12-13 18:15:40,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:15:40,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 18:15:40,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:15:40,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 18:15:40,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=625, Unknown=1, NotChecked=50, Total=756 [2022-12-13 18:15:40,321 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 271 [2022-12-13 18:15:40,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 269 transitions, 4237 flow. Second operand has 28 states, 28 states have (on average 78.67857142857143) internal successors, (2203), 28 states have internal predecessors, (2203), 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 18:15:40,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:15:40,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 271 [2022-12-13 18:15:40,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:41,736 INFO L130 PetriNetUnfolder]: 528/1109 cut-off events. [2022-12-13 18:15:41,736 INFO L131 PetriNetUnfolder]: For 9593/9593 co-relation queries the response was YES. [2022-12-13 18:15:41,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8137 conditions, 1109 events. 528/1109 cut-off events. For 9593/9593 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6500 event pairs, 35 based on Foata normal form. 2/1054 useless extension candidates. Maximal degree in co-relation 8091. Up to 851 conditions per place. [2022-12-13 18:15:41,743 INFO L137 encePairwiseOnDemand]: 259/271 looper letters, 228 selfloop transitions, 61 changer transitions 48/338 dead transitions. [2022-12-13 18:15:41,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 338 transitions, 5607 flow [2022-12-13 18:15:41,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 18:15:41,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 18:15:41,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1632 transitions. [2022-12-13 18:15:41,745 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3011070110701107 [2022-12-13 18:15:41,745 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1632 transitions. [2022-12-13 18:15:41,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1632 transitions. [2022-12-13 18:15:41,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:41,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1632 transitions. [2022-12-13 18:15:41,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 81.6) internal successors, (1632), 20 states have internal predecessors, (1632), 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 18:15:41,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 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 18:15:41,750 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 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 18:15:41,750 INFO L175 Difference]: Start difference. First operand has 169 places, 269 transitions, 4237 flow. Second operand 20 states and 1632 transitions. [2022-12-13 18:15:41,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 338 transitions, 5607 flow [2022-12-13 18:15:41,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 338 transitions, 5095 flow, removed 83 selfloop flow, removed 28 redundant places. [2022-12-13 18:15:41,784 INFO L231 Difference]: Finished difference. Result has 151 places, 265 transitions, 3884 flow [2022-12-13 18:15:41,784 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3772, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3884, PETRI_PLACES=151, PETRI_TRANSITIONS=265} [2022-12-13 18:15:41,785 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 130 predicate places. [2022-12-13 18:15:41,785 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 265 transitions, 3884 flow [2022-12-13 18:15:41,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 78.67857142857143) internal successors, (2203), 28 states have internal predecessors, (2203), 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 18:15:41,785 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:41,785 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:41,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 18:15:41,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 18:15:41,986 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:15:41,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:41,986 INFO L85 PathProgramCache]: Analyzing trace with hash 2104018813, now seen corresponding path program 7 times [2022-12-13 18:15:41,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:41,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052350905] [2022-12-13 18:15:41,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:41,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:15:42,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:42,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052350905] [2022-12-13 18:15:42,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052350905] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:15:42,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578386442] [2022-12-13 18:15:42,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 18:15:42,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:42,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:15:42,081 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:15:42,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 18:15:42,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:42,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:15:42,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:15:42,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:15:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:15:42,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578386442] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:15:42,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:15:42,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-13 18:15:42,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184447250] [2022-12-13 18:15:42,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:15:42,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 18:15:42,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:15:42,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 18:15:42,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-12-13 18:15:42,422 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 271 [2022-12-13 18:15:42,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 265 transitions, 3884 flow. Second operand has 18 states, 18 states have (on average 111.72222222222223) internal successors, (2011), 18 states have internal predecessors, (2011), 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 18:15:42,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:15:42,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 271 [2022-12-13 18:15:42,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:42,692 INFO L130 PetriNetUnfolder]: 340/701 cut-off events. [2022-12-13 18:15:42,692 INFO L131 PetriNetUnfolder]: For 6886/6895 co-relation queries the response was YES. [2022-12-13 18:15:42,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5284 conditions, 701 events. 340/701 cut-off events. For 6886/6895 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3540 event pairs, 77 based on Foata normal form. 37/688 useless extension candidates. Maximal degree in co-relation 5241. Up to 586 conditions per place. [2022-12-13 18:15:42,696 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 139 selfloop transitions, 4 changer transitions 44/195 dead transitions. [2022-12-13 18:15:42,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 195 transitions, 3327 flow [2022-12-13 18:15:42,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:15:42,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 18:15:42,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 916 transitions. [2022-12-13 18:15:42,698 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4225092250922509 [2022-12-13 18:15:42,698 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 916 transitions. [2022-12-13 18:15:42,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 916 transitions. [2022-12-13 18:15:42,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:42,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 916 transitions. [2022-12-13 18:15:42,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.5) internal successors, (916), 8 states have internal predecessors, (916), 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 18:15:42,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 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 18:15:42,700 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 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 18:15:42,700 INFO L175 Difference]: Start difference. First operand has 151 places, 265 transitions, 3884 flow. Second operand 8 states and 916 transitions. [2022-12-13 18:15:42,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 195 transitions, 3327 flow [2022-12-13 18:15:42,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 195 transitions, 2819 flow, removed 54 selfloop flow, removed 29 redundant places. [2022-12-13 18:15:42,717 INFO L231 Difference]: Finished difference. Result has 119 places, 151 transitions, 1999 flow [2022-12-13 18:15:42,717 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=2376, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1999, PETRI_PLACES=119, PETRI_TRANSITIONS=151} [2022-12-13 18:15:42,717 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 98 predicate places. [2022-12-13 18:15:42,717 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 151 transitions, 1999 flow [2022-12-13 18:15:42,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 111.72222222222223) internal successors, (2011), 18 states have internal predecessors, (2011), 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 18:15:42,718 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:42,718 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:42,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 18:15:42,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 18:15:42,920 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:15:42,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:42,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1999518780, now seen corresponding path program 8 times [2022-12-13 18:15:42,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:42,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518703209] [2022-12-13 18:15:42,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:42,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:43,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:43,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518703209] [2022-12-13 18:15:43,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518703209] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:15:43,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657681238] [2022-12-13 18:15:43,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:15:43,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:43,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:15:43,356 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:15:43,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 18:15:43,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:15:43,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:15:43,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 18:15:43,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:43,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:15:43,838 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-12-13 18:15:43,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2022-12-13 18:15:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:44,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657681238] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:15:44,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:15:44,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2022-12-13 18:15:44,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215586754] [2022-12-13 18:15:44,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:15:44,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 18:15:44,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:15:44,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 18:15:44,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2022-12-13 18:15:44,634 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 271 [2022-12-13 18:15:44,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 151 transitions, 1999 flow. Second operand has 29 states, 29 states have (on average 103.65517241379311) internal successors, (3006), 29 states have internal predecessors, (3006), 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 18:15:44,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:15:44,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 271 [2022-12-13 18:15:44,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:46,655 INFO L130 PetriNetUnfolder]: 728/1394 cut-off events. [2022-12-13 18:15:46,655 INFO L131 PetriNetUnfolder]: For 7616/7620 co-relation queries the response was YES. [2022-12-13 18:15:46,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8368 conditions, 1394 events. 728/1394 cut-off events. For 7616/7620 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7687 event pairs, 36 based on Foata normal form. 92/1322 useless extension candidates. Maximal degree in co-relation 8337. Up to 733 conditions per place. [2022-12-13 18:15:46,661 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 212 selfloop transitions, 211 changer transitions 7/438 dead transitions. [2022-12-13 18:15:46,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 438 transitions, 5292 flow [2022-12-13 18:15:46,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 18:15:46,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-13 18:15:46,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4239 transitions. [2022-12-13 18:15:46,665 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4010786261708771 [2022-12-13 18:15:46,665 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4239 transitions. [2022-12-13 18:15:46,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4239 transitions. [2022-12-13 18:15:46,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:46,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4239 transitions. [2022-12-13 18:15:46,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 108.6923076923077) internal successors, (4239), 39 states have internal predecessors, (4239), 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 18:15:46,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 271.0) internal successors, (10840), 40 states have internal predecessors, (10840), 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 18:15:46,684 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 271.0) internal successors, (10840), 40 states have internal predecessors, (10840), 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 18:15:46,684 INFO L175 Difference]: Start difference. First operand has 119 places, 151 transitions, 1999 flow. Second operand 39 states and 4239 transitions. [2022-12-13 18:15:46,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 438 transitions, 5292 flow [2022-12-13 18:15:46,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 438 transitions, 5164 flow, removed 41 selfloop flow, removed 8 redundant places. [2022-12-13 18:15:46,700 INFO L231 Difference]: Finished difference. Result has 130 places, 296 transitions, 4209 flow [2022-12-13 18:15:46,700 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4209, PETRI_PLACES=130, PETRI_TRANSITIONS=296} [2022-12-13 18:15:46,701 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 109 predicate places. [2022-12-13 18:15:46,701 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 296 transitions, 4209 flow [2022-12-13 18:15:46,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 103.65517241379311) internal successors, (3006), 29 states have internal predecessors, (3006), 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 18:15:46,701 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:46,701 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:46,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 18:15:46,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 18:15:46,902 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:15:46,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:46,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1763948484, now seen corresponding path program 9 times [2022-12-13 18:15:46,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:46,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736861528] [2022-12-13 18:15:46,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:46,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:47,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:47,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736861528] [2022-12-13 18:15:47,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736861528] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:15:47,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721337888] [2022-12-13 18:15:47,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:15:47,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:47,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:15:47,500 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:15:47,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 18:15:47,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 18:15:47,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:15:47,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 18:15:47,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:47,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:15:47,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-12-13 18:15:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:15:47,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:15:47,864 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_558 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_558) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 0))) is different from false [2022-12-13 18:15:47,874 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:47,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 44 [2022-12-13 18:15:47,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2022-12-13 18:15:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2022-12-13 18:15:47,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721337888] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:15:47,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:15:47,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 23 [2022-12-13 18:15:47,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597150185] [2022-12-13 18:15:47,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:15:47,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 18:15:47,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:15:47,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 18:15:47,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=453, Unknown=1, NotChecked=42, Total=552 [2022-12-13 18:15:48,048 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 271 [2022-12-13 18:15:48,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 296 transitions, 4209 flow. Second operand has 24 states, 24 states have (on average 89.75) internal successors, (2154), 24 states have internal predecessors, (2154), 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 18:15:48,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:15:48,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 271 [2022-12-13 18:15:48,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:49,851 INFO L130 PetriNetUnfolder]: 1013/1937 cut-off events. [2022-12-13 18:15:49,851 INFO L131 PetriNetUnfolder]: For 12674/12678 co-relation queries the response was YES. [2022-12-13 18:15:49,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13003 conditions, 1937 events. 1013/1937 cut-off events. For 12674/12678 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11153 event pairs, 29 based on Foata normal form. 98/1845 useless extension candidates. Maximal degree in co-relation 12968. Up to 1103 conditions per place. [2022-12-13 18:15:49,860 INFO L137 encePairwiseOnDemand]: 264/271 looper letters, 262 selfloop transitions, 223 changer transitions 2/495 dead transitions. [2022-12-13 18:15:49,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 495 transitions, 7188 flow [2022-12-13 18:15:49,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 18:15:49,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 18:15:49,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2631 transitions. [2022-12-13 18:15:49,863 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3467316816025303 [2022-12-13 18:15:49,863 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2631 transitions. [2022-12-13 18:15:49,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2631 transitions. [2022-12-13 18:15:49,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:49,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2631 transitions. [2022-12-13 18:15:49,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 93.96428571428571) internal successors, (2631), 28 states have internal predecessors, (2631), 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 18:15:49,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 271.0) internal successors, (7859), 29 states have internal predecessors, (7859), 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 18:15:49,869 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 271.0) internal successors, (7859), 29 states have internal predecessors, (7859), 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 18:15:49,869 INFO L175 Difference]: Start difference. First operand has 130 places, 296 transitions, 4209 flow. Second operand 28 states and 2631 transitions. [2022-12-13 18:15:49,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 495 transitions, 7188 flow [2022-12-13 18:15:49,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 495 transitions, 6363 flow, removed 405 selfloop flow, removed 5 redundant places. [2022-12-13 18:15:49,907 INFO L231 Difference]: Finished difference. Result has 161 places, 376 transitions, 5428 flow [2022-12-13 18:15:49,907 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3662, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5428, PETRI_PLACES=161, PETRI_TRANSITIONS=376} [2022-12-13 18:15:49,907 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 140 predicate places. [2022-12-13 18:15:49,907 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 376 transitions, 5428 flow [2022-12-13 18:15:49,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 89.75) internal successors, (2154), 24 states have internal predecessors, (2154), 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 18:15:49,908 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:49,908 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:49,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 18:15:50,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 18:15:50,109 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:15:50,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:50,109 INFO L85 PathProgramCache]: Analyzing trace with hash 899815247, now seen corresponding path program 10 times [2022-12-13 18:15:50,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:50,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734577038] [2022-12-13 18:15:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:50,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:50,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:50,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734577038] [2022-12-13 18:15:50,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734577038] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:15:50,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668341831] [2022-12-13 18:15:50,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:15:50,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:50,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:15:50,855 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:15:50,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 18:15:50,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:15:50,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:15:50,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 18:15:50,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:51,123 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:51,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 12 [2022-12-13 18:15:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:15:51,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:15:51,303 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:51,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 78 [2022-12-13 18:15:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:15:51,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668341831] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:15:51,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:15:51,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 25 [2022-12-13 18:15:51,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673045889] [2022-12-13 18:15:51,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:15:51,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 18:15:51,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:15:51,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 18:15:51,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-12-13 18:15:52,714 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 271 [2022-12-13 18:15:52,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 376 transitions, 5428 flow. Second operand has 27 states, 27 states have (on average 97.81481481481481) internal successors, (2641), 27 states have internal predecessors, (2641), 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 18:15:52,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:15:52,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 271 [2022-12-13 18:15:52,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:53,967 INFO L130 PetriNetUnfolder]: 1096/2121 cut-off events. [2022-12-13 18:15:53,967 INFO L131 PetriNetUnfolder]: For 14704/14704 co-relation queries the response was YES. [2022-12-13 18:15:53,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14035 conditions, 2121 events. 1096/2121 cut-off events. For 14704/14704 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12692 event pairs, 105 based on Foata normal form. 4/2023 useless extension candidates. Maximal degree in co-relation 13987. Up to 1789 conditions per place. [2022-12-13 18:15:53,978 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 367 selfloop transitions, 105 changer transitions 7/480 dead transitions. [2022-12-13 18:15:53,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 480 transitions, 7394 flow [2022-12-13 18:15:53,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 18:15:53,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 18:15:53,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2618 transitions. [2022-12-13 18:15:53,981 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37155833096792507 [2022-12-13 18:15:53,981 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2618 transitions. [2022-12-13 18:15:53,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2618 transitions. [2022-12-13 18:15:53,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:53,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2618 transitions. [2022-12-13 18:15:53,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 100.6923076923077) internal successors, (2618), 26 states have internal predecessors, (2618), 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 18:15:53,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 271.0) internal successors, (7317), 27 states have internal predecessors, (7317), 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 18:15:53,987 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 271.0) internal successors, (7317), 27 states have internal predecessors, (7317), 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 18:15:53,987 INFO L175 Difference]: Start difference. First operand has 161 places, 376 transitions, 5428 flow. Second operand 26 states and 2618 transitions. [2022-12-13 18:15:53,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 480 transitions, 7394 flow [2022-12-13 18:15:54,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 480 transitions, 6735 flow, removed 229 selfloop flow, removed 11 redundant places. [2022-12-13 18:15:54,044 INFO L231 Difference]: Finished difference. Result has 186 places, 418 transitions, 5764 flow [2022-12-13 18:15:54,044 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4817, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5764, PETRI_PLACES=186, PETRI_TRANSITIONS=418} [2022-12-13 18:15:54,044 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 165 predicate places. [2022-12-13 18:15:54,045 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 418 transitions, 5764 flow [2022-12-13 18:15:54,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 97.81481481481481) internal successors, (2641), 27 states have internal predecessors, (2641), 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 18:15:54,045 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:54,045 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:54,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-13 18:15:54,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 18:15:54,245 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:15:54,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:54,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1751059197, now seen corresponding path program 11 times [2022-12-13 18:15:54,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:54,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482179163] [2022-12-13 18:15:54,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:54,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:54,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:54,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:54,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482179163] [2022-12-13 18:15:54,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482179163] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:15:54,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283422684] [2022-12-13 18:15:54,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:15:54,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:54,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:15:54,882 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:15:54,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 18:15:54,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 18:15:54,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:15:54,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 18:15:54,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:55,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:15:55,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 12 [2022-12-13 18:15:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:15:55,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:15:55,472 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-12-13 18:15:55,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 64 [2022-12-13 18:15:55,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:15:55,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283422684] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:15:55,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:15:55,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 26 [2022-12-13 18:15:55,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516421503] [2022-12-13 18:15:55,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:15:55,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 18:15:55,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:15:55,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 18:15:55,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-12-13 18:15:56,578 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 271 [2022-12-13 18:15:56,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 418 transitions, 5764 flow. Second operand has 28 states, 28 states have (on average 97.96428571428571) internal successors, (2743), 28 states have internal predecessors, (2743), 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 18:15:56,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:15:56,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 271 [2022-12-13 18:15:56,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:15:59,452 INFO L130 PetriNetUnfolder]: 1258/2472 cut-off events. [2022-12-13 18:15:59,452 INFO L131 PetriNetUnfolder]: For 17432/17432 co-relation queries the response was YES. [2022-12-13 18:15:59,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15945 conditions, 2472 events. 1258/2472 cut-off events. For 17432/17432 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15835 event pairs, 97 based on Foata normal form. 12/2370 useless extension candidates. Maximal degree in co-relation 15886. Up to 1886 conditions per place. [2022-12-13 18:15:59,466 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 398 selfloop transitions, 171 changer transitions 49/619 dead transitions. [2022-12-13 18:15:59,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 619 transitions, 8887 flow [2022-12-13 18:15:59,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-13 18:15:59,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-12-13 18:15:59,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 4539 transitions. [2022-12-13 18:15:59,472 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3722017220172202 [2022-12-13 18:15:59,473 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 4539 transitions. [2022-12-13 18:15:59,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 4539 transitions. [2022-12-13 18:15:59,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:15:59,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 4539 transitions. [2022-12-13 18:15:59,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 100.86666666666666) internal successors, (4539), 45 states have internal predecessors, (4539), 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 18:15:59,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 271.0) internal successors, (12466), 46 states have internal predecessors, (12466), 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 18:15:59,489 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 271.0) internal successors, (12466), 46 states have internal predecessors, (12466), 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 18:15:59,489 INFO L175 Difference]: Start difference. First operand has 186 places, 418 transitions, 5764 flow. Second operand 45 states and 4539 transitions. [2022-12-13 18:15:59,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 619 transitions, 8887 flow [2022-12-13 18:15:59,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 619 transitions, 8703 flow, removed 61 selfloop flow, removed 9 redundant places. [2022-12-13 18:15:59,592 INFO L231 Difference]: Finished difference. Result has 240 places, 479 transitions, 7010 flow [2022-12-13 18:15:59,593 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=5587, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=7010, PETRI_PLACES=240, PETRI_TRANSITIONS=479} [2022-12-13 18:15:59,593 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 219 predicate places. [2022-12-13 18:15:59,593 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 479 transitions, 7010 flow [2022-12-13 18:15:59,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 97.96428571428571) internal successors, (2743), 28 states have internal predecessors, (2743), 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 18:15:59,593 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:15:59,593 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:59,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-13 18:15:59,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:59,795 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:15:59,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:59,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1193069071, now seen corresponding path program 12 times [2022-12-13 18:15:59,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:59,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805988235] [2022-12-13 18:15:59,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:59,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:16:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:16:00,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:16:00,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805988235] [2022-12-13 18:16:00,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805988235] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:16:00,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764228542] [2022-12-13 18:16:00,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:16:00,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:16:00,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:16:00,524 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:16:00,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 18:16:00,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 18:16:00,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:16:00,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-13 18:16:00,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:16:01,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:16:01,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:16:01,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 26 [2022-12-13 18:16:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:16:01,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:16:01,657 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:16:01,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 119 treesize of output 184 [2022-12-13 18:16:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:16:02,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764228542] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:16:02,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:16:02,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 35 [2022-12-13 18:16:02,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050253838] [2022-12-13 18:16:02,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:16:02,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 18:16:02,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:16:02,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 18:16:02,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 18:16:04,252 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 271 [2022-12-13 18:16:04,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 479 transitions, 7010 flow. Second operand has 37 states, 37 states have (on average 95.56756756756756) internal successors, (3536), 37 states have internal predecessors, (3536), 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 18:16:04,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:16:04,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 271 [2022-12-13 18:16:04,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:16:11,458 INFO L130 PetriNetUnfolder]: 1510/3007 cut-off events. [2022-12-13 18:16:11,458 INFO L131 PetriNetUnfolder]: For 24719/24719 co-relation queries the response was YES. [2022-12-13 18:16:11,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20257 conditions, 3007 events. 1510/3007 cut-off events. For 24719/24719 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20392 event pairs, 69 based on Foata normal form. 6/2893 useless extension candidates. Maximal degree in co-relation 20179. Up to 1157 conditions per place. [2022-12-13 18:16:11,492 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 336 selfloop transitions, 353 changer transitions 31/721 dead transitions. [2022-12-13 18:16:11,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 721 transitions, 10971 flow [2022-12-13 18:16:11,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 18:16:11,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-13 18:16:11,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3367 transitions. [2022-12-13 18:16:11,497 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.365422183633601 [2022-12-13 18:16:11,497 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3367 transitions. [2022-12-13 18:16:11,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3367 transitions. [2022-12-13 18:16:11,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:16:11,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3367 transitions. [2022-12-13 18:16:11,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 99.02941176470588) internal successors, (3367), 34 states have internal predecessors, (3367), 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 18:16:11,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 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 18:16:11,506 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 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 18:16:11,506 INFO L175 Difference]: Start difference. First operand has 240 places, 479 transitions, 7010 flow. Second operand 34 states and 3367 transitions. [2022-12-13 18:16:11,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 721 transitions, 10971 flow [2022-12-13 18:16:11,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 721 transitions, 10503 flow, removed 156 selfloop flow, removed 23 redundant places. [2022-12-13 18:16:11,657 INFO L231 Difference]: Finished difference. Result has 251 places, 598 transitions, 9474 flow [2022-12-13 18:16:11,657 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=6607, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9474, PETRI_PLACES=251, PETRI_TRANSITIONS=598} [2022-12-13 18:16:11,657 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 230 predicate places. [2022-12-13 18:16:11,657 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 598 transitions, 9474 flow [2022-12-13 18:16:11,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 95.56756756756756) internal successors, (3536), 37 states have internal predecessors, (3536), 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 18:16:11,658 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:16:11,658 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:16:11,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 18:16:11,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:16:11,859 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:16:11,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:16:11,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1272592617, now seen corresponding path program 13 times [2022-12-13 18:16:11,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:16:11,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248541332] [2022-12-13 18:16:11,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:16:11,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:16:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:16:12,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:16:12,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:16:12,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248541332] [2022-12-13 18:16:12,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248541332] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:16:12,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493111761] [2022-12-13 18:16:12,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 18:16:12,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:16:12,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:16:12,715 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:16:12,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 18:16:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:16:12,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 18:16:12,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:16:13,032 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:16:13,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 12 [2022-12-13 18:16:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:16:13,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:16:13,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:16:13,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 78 [2022-12-13 18:16:13,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:16:13,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493111761] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:16:13,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:16:13,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 25 [2022-12-13 18:16:13,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628905106] [2022-12-13 18:16:13,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:16:13,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 18:16:13,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:16:13,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 18:16:13,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-12-13 18:16:14,984 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 271 [2022-12-13 18:16:14,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 598 transitions, 9474 flow. Second operand has 27 states, 27 states have (on average 92.74074074074075) internal successors, (2504), 27 states have internal predecessors, (2504), 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 18:16:14,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:16:14,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 271 [2022-12-13 18:16:14,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:16:17,911 INFO L130 PetriNetUnfolder]: 2052/4138 cut-off events. [2022-12-13 18:16:17,911 INFO L131 PetriNetUnfolder]: For 37937/37938 co-relation queries the response was YES. [2022-12-13 18:16:17,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29883 conditions, 4138 events. 2052/4138 cut-off events. For 37937/37938 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 30718 event pairs, 143 based on Foata normal form. 13/4120 useless extension candidates. Maximal degree in co-relation 29802. Up to 1971 conditions per place. [2022-12-13 18:16:17,936 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 523 selfloop transitions, 315 changer transitions 47/886 dead transitions. [2022-12-13 18:16:17,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 886 transitions, 14947 flow [2022-12-13 18:16:17,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 18:16:17,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 18:16:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3068 transitions. [2022-12-13 18:16:17,939 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35378228782287824 [2022-12-13 18:16:17,940 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3068 transitions. [2022-12-13 18:16:17,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3068 transitions. [2022-12-13 18:16:17,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:16:17,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3068 transitions. [2022-12-13 18:16:17,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 95.875) internal successors, (3068), 32 states have internal predecessors, (3068), 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 18:16:17,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 271.0) internal successors, (8943), 33 states have internal predecessors, (8943), 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 18:16:17,948 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 271.0) internal successors, (8943), 33 states have internal predecessors, (8943), 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 18:16:17,948 INFO L175 Difference]: Start difference. First operand has 251 places, 598 transitions, 9474 flow. Second operand 32 states and 3068 transitions. [2022-12-13 18:16:17,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 886 transitions, 14947 flow [2022-12-13 18:16:18,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 886 transitions, 14236 flow, removed 271 selfloop flow, removed 24 redundant places. [2022-12-13 18:16:18,298 INFO L231 Difference]: Finished difference. Result has 265 places, 724 transitions, 12139 flow [2022-12-13 18:16:18,299 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=8992, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=12139, PETRI_PLACES=265, PETRI_TRANSITIONS=724} [2022-12-13 18:16:18,299 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 244 predicate places. [2022-12-13 18:16:18,299 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 724 transitions, 12139 flow [2022-12-13 18:16:18,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 92.74074074074075) internal successors, (2504), 27 states have internal predecessors, (2504), 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 18:16:18,299 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:16:18,299 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:16:18,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-13 18:16:18,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 18:16:18,501 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:16:18,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:16:18,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1120912549, now seen corresponding path program 14 times [2022-12-13 18:16:18,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:16:18,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622126566] [2022-12-13 18:16:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:16:18,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:16:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:16:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:16:19,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:16:19,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622126566] [2022-12-13 18:16:19,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622126566] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:16:19,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705643460] [2022-12-13 18:16:19,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:16:19,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:16:19,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:16:19,526 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:16:19,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 18:16:19,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:16:19,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:16:19,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-13 18:16:19,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:16:19,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 18:16:19,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 18:16:19,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 18:16:19,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:16:19,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-12-13 18:16:20,152 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:16:20,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 12 [2022-12-13 18:16:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:16:20,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:16:20,659 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| c_~q~0.base)) (.cse2 (* 4 c_~q_back~0)) (.cse0 (+ c_~q_front~0 2))) (or (<= c_~n~0 .cse0) (not (<= 0 c_~q_back~0)) (not (= (select .cse1 (+ c_~q~0.offset .cse2)) 1)) (not (< c_~q_back~0 c_~n~0)) (not (= (select .cse1 (+ c_~q~0.offset .cse2 4)) 1)) (let ((.cse7 (* c_~q_front~0 4))) (let ((.cse4 (+ .cse7 c_~q~0.offset 4)) (.cse5 (+ .cse7 c_~q~0.offset))) (and (forall ((v_ArrVal_754 (Array Int Int))) (< (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) c_~q~0.base))) (+ c_~s~0 (select .cse3 .cse4) (select .cse3 .cse5))) (+ 3 |c_thread1Thread1of1ForFork1_~i~0#1|))) (forall ((v_ArrVal_754 (Array Int Int))) (< (+ |c_thread1Thread1of1ForFork1_~i~0#1| 1) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) c_~q~0.base))) (+ c_~s~0 (select .cse6 .cse4) (select .cse6 .cse5)))))))) (< .cse0 0))) is different from false [2022-12-13 18:16:20,828 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~q_front~0 2))) (or (<= c_~n~0 .cse0) (not (<= 0 c_~q_back~0)) (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (not (< c_~q_back~0 c_~n~0)) (let ((.cse11 (* 4 c_~q_back~0)) (.cse12 (* c_~q_front~0 4))) (let ((.cse4 (+ .cse12 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse5 (+ .cse12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse2 (+ .cse11 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse7 (+ .cse11 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_753 (Array Int Int))) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_753))) (let ((.cse1 (select .cse6 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse1 .cse2) 1)) (forall ((v_ArrVal_754 (Array Int Int))) (< 1 (let ((.cse3 (select (store .cse6 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ c_~s~0 (select .cse3 .cse4) (select .cse3 .cse5))))) (not (= (select .cse1 .cse7) 1)))))) (forall ((v_ArrVal_753 (Array Int Int))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_753))) (let ((.cse10 (select .cse9 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (forall ((v_ArrVal_754 (Array Int Int))) (< (let ((.cse8 (select (store .cse9 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ c_~s~0 (select .cse8 .cse4) (select .cse8 .cse5))) 3)) (not (= (select .cse10 .cse2) 1)) (not (= (select .cse10 .cse7) 1))))))))) (< .cse0 0))) is different from false [2022-12-13 18:16:20,869 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~q_front~0 2))) (or (<= c_~n~0 .cse0) (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (let ((.cse13 (* c_~q_front~0 4)) (.cse14 (* 4 c_~q_back~0))) (let ((.cse2 (+ .cse14 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse3 (+ .cse14 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse5 (+ .cse13 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse6 (+ .cse13 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse8 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse9 (+ (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_752 Int) (v_ArrVal_753 (Array Int Int))) (let ((.cse7 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse8 .cse9 v_ArrVal_752)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_753))) (let ((.cse1 (select .cse7 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse1 .cse2) 1)) (not (= (select .cse1 .cse3) 1)) (forall ((v_ArrVal_754 (Array Int Int))) (< 1 (let ((.cse4 (select (store .cse7 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ c_~s~0 (select .cse4 .cse5) (select .cse4 .cse6))))))))) (forall ((v_ArrVal_752 Int) (v_ArrVal_753 (Array Int Int))) (let ((.cse12 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse8 .cse9 v_ArrVal_752)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_753))) (let ((.cse10 (select .cse12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse10 .cse2) 1)) (not (= (select .cse10 .cse3) 1)) (forall ((v_ArrVal_754 (Array Int Int))) (< (let ((.cse11 (select (store .cse12 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ c_~s~0 (select .cse11 .cse5) (select .cse11 .cse6))) 3))))))))) (< .cse0 0))) is different from false [2022-12-13 18:16:20,897 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:16:20,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 147 treesize of output 92 [2022-12-13 18:16:20,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:16:20,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 176 treesize of output 194 [2022-12-13 18:16:20,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 67 [2022-12-13 18:16:20,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:16:20,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 115 [2022-12-13 18:16:21,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:16:21,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 147 treesize of output 92 [2022-12-13 18:16:21,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:16:21,396 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-12-13 18:16:21,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 92 [2022-12-13 18:16:21,417 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-12-13 18:16:21,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 55 [2022-12-13 18:16:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2022-12-13 18:16:21,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705643460] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:16:21,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:16:21,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2022-12-13 18:16:21,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159964296] [2022-12-13 18:16:21,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:16:21,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 18:16:21,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:16:21,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 18:16:21,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1191, Unknown=7, NotChecked=216, Total=1560 [2022-12-13 18:16:21,735 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 271 [2022-12-13 18:16:21,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 724 transitions, 12139 flow. Second operand has 40 states, 40 states have (on average 75.45) internal successors, (3018), 40 states have internal predecessors, (3018), 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 18:16:21,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:16:21,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 271 [2022-12-13 18:16:21,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:16:22,368 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4 c_~q_back~0)) (.cse1 (* c_~q_front~0 4)) (.cse24 (+ c_~q_front~0 2))) (let ((.cse0 (<= c_~n~0 .cse24)) (.cse3 (not (<= 0 c_~q_back~0))) (.cse4 (not (< c_~q_back~0 c_~n~0))) (.cse10 (+ .cse1 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse11 (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse7 (+ .cse2 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse8 (+ .cse2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse5 (< .cse24 0))) (and (or .cse0 (and (< c_~s~0 1) (< 0 (+ c_~s~0 1)) (= .cse1 .cse2) (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) .cse3 .cse4 (< (+ 3 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse5) (or .cse0 .cse3 .cse4 (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (let ((.cse13 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse14 (+ (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_752 Int) (v_ArrVal_753 (Array Int Int))) (let ((.cse12 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse13 .cse14 v_ArrVal_752)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_753))) (let ((.cse6 (select .cse12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse6 .cse7) 1)) (not (= (select .cse6 .cse8) 1)) (forall ((v_ArrVal_754 (Array Int Int))) (< 1 (let ((.cse9 (select (store .cse12 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ c_~s~0 (select .cse9 .cse10) (select .cse9 .cse11))))))))) (forall ((v_ArrVal_752 Int) (v_ArrVal_753 (Array Int Int))) (let ((.cse17 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse13 .cse14 v_ArrVal_752)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_753))) (let ((.cse15 (select .cse17 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse15 .cse7) 1)) (not (= (select .cse15 .cse8) 1)) (forall ((v_ArrVal_754 (Array Int Int))) (< (let ((.cse16 (select (store .cse17 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ c_~s~0 (select .cse16 .cse10) (select .cse16 .cse11))) 3)))))))) .cse5) (or .cse0 .cse3 (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse4 (and (forall ((v_ArrVal_753 (Array Int Int))) (let ((.cse20 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_753))) (let ((.cse18 (select .cse20 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse18 .cse7) 1)) (forall ((v_ArrVal_754 (Array Int Int))) (< 1 (let ((.cse19 (select (store .cse20 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ c_~s~0 (select .cse19 .cse10) (select .cse19 .cse11))))) (not (= (select .cse18 .cse8) 1)))))) (forall ((v_ArrVal_753 (Array Int Int))) (let ((.cse22 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_753))) (let ((.cse23 (select .cse22 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (forall ((v_ArrVal_754 (Array Int Int))) (< (let ((.cse21 (select (store .cse22 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ c_~s~0 (select .cse21 .cse10) (select .cse21 .cse11))) 3)) (not (= (select .cse23 .cse7) 1)) (not (= (select .cse23 .cse8) 1))))))) .cse5)))) is different from false [2022-12-13 18:16:22,391 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4 c_~q_back~0)) (.cse1 (* c_~q_front~0 4)) (.cse24 (+ c_~q_front~0 2))) (let ((.cse0 (<= c_~n~0 .cse24)) (.cse3 (not (<= 0 c_~q_back~0))) (.cse4 (not (< c_~q_back~0 c_~n~0))) (.cse10 (+ .cse1 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse11 (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse7 (+ .cse2 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse8 (+ .cse2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse5 (< .cse24 0))) (and (or .cse0 (and (< c_~s~0 1) (< 0 (+ c_~s~0 1)) (= .cse1 .cse2) (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) .cse3 .cse4 (< (+ 2 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse5) (or .cse0 .cse3 .cse4 (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (let ((.cse13 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse14 (+ (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_752 Int) (v_ArrVal_753 (Array Int Int))) (let ((.cse12 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse13 .cse14 v_ArrVal_752)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_753))) (let ((.cse6 (select .cse12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse6 .cse7) 1)) (not (= (select .cse6 .cse8) 1)) (forall ((v_ArrVal_754 (Array Int Int))) (< 1 (let ((.cse9 (select (store .cse12 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ c_~s~0 (select .cse9 .cse10) (select .cse9 .cse11))))))))) (forall ((v_ArrVal_752 Int) (v_ArrVal_753 (Array Int Int))) (let ((.cse17 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse13 .cse14 v_ArrVal_752)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_753))) (let ((.cse15 (select .cse17 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse15 .cse7) 1)) (not (= (select .cse15 .cse8) 1)) (forall ((v_ArrVal_754 (Array Int Int))) (< (let ((.cse16 (select (store .cse17 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ c_~s~0 (select .cse16 .cse10) (select .cse16 .cse11))) 3)))))))) .cse5) (or .cse0 .cse3 (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse4 (and (forall ((v_ArrVal_753 (Array Int Int))) (let ((.cse20 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_753))) (let ((.cse18 (select .cse20 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse18 .cse7) 1)) (forall ((v_ArrVal_754 (Array Int Int))) (< 1 (let ((.cse19 (select (store .cse20 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ c_~s~0 (select .cse19 .cse10) (select .cse19 .cse11))))) (not (= (select .cse18 .cse8) 1)))))) (forall ((v_ArrVal_753 (Array Int Int))) (let ((.cse22 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_753))) (let ((.cse23 (select .cse22 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (forall ((v_ArrVal_754 (Array Int Int))) (< (let ((.cse21 (select (store .cse22 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ c_~s~0 (select .cse21 .cse10) (select .cse21 .cse11))) 3)) (not (= (select .cse23 .cse7) 1)) (not (= (select .cse23 .cse8) 1))))))) .cse5)))) is different from false [2022-12-13 18:16:22,525 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse23 (* 4 c_~q_back~0)) (.cse24 (* c_~q_front~0 4)) (.cse22 (+ c_~q_front~0 2))) (let ((.cse0 (<= c_~n~0 .cse22)) (.cse1 (not (<= 0 c_~q_back~0))) (.cse2 (not (< c_~q_back~0 c_~n~0))) (.cse7 (+ .cse24 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse8 (+ .cse24 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse4 (+ .cse23 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse5 (+ .cse23 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse15 (< .cse22 0))) (and (or .cse0 .cse1 .cse2 (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (let ((.cse10 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse11 (+ (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_752 Int) (v_ArrVal_753 (Array Int Int))) (let ((.cse9 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse10 .cse11 v_ArrVal_752)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_753))) (let ((.cse3 (select .cse9 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse3 .cse4) 1)) (not (= (select .cse3 .cse5) 1)) (forall ((v_ArrVal_754 (Array Int Int))) (< 1 (let ((.cse6 (select (store .cse9 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ c_~s~0 (select .cse6 .cse7) (select .cse6 .cse8))))))))) (forall ((v_ArrVal_752 Int) (v_ArrVal_753 (Array Int Int))) (let ((.cse14 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse10 .cse11 v_ArrVal_752)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_753))) (let ((.cse12 (select .cse14 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse12 .cse4) 1)) (not (= (select .cse12 .cse5) 1)) (forall ((v_ArrVal_754 (Array Int Int))) (< (let ((.cse13 (select (store .cse14 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ c_~s~0 (select .cse13 .cse7) (select .cse13 .cse8))) 3)))))))) .cse15) (or .cse0 .cse1 (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse2 (and (forall ((v_ArrVal_753 (Array Int Int))) (let ((.cse18 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_753))) (let ((.cse16 (select .cse18 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse16 .cse4) 1)) (forall ((v_ArrVal_754 (Array Int Int))) (< 1 (let ((.cse17 (select (store .cse18 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ c_~s~0 (select .cse17 .cse7) (select .cse17 .cse8))))) (not (= (select .cse16 .cse5) 1)))))) (forall ((v_ArrVal_753 (Array Int Int))) (let ((.cse20 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_753))) (let ((.cse21 (select .cse20 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (forall ((v_ArrVal_754 (Array Int Int))) (< (let ((.cse19 (select (store .cse20 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ c_~s~0 (select .cse19 .cse7) (select .cse19 .cse8))) 3)) (not (= (select .cse21 .cse4) 1)) (not (= (select .cse21 .cse5) 1))))))) .cse15)))) is different from false [2022-12-13 18:16:24,025 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse11 (* c_~q_front~0 4)) (.cse10 (+ c_~q_front~0 2))) (let ((.cse0 (<= c_~n~0 .cse10)) (.cse2 (+ .cse11 c_~q~0.offset 4)) (.cse3 (+ .cse11 c_~q~0.offset)) (.cse5 (< .cse10 0))) (and (or .cse0 (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0) (and (forall ((v_ArrVal_754 (Array Int Int))) (<= c_~N~0 (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) c_~q~0.base))) (+ c_~s~0 (select .cse1 .cse2) (select .cse1 .cse3))))) (forall ((v_ArrVal_754 (Array Int Int))) (< (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) c_~q~0.base))) (+ c_~s~0 (select .cse4 .cse2) (select .cse4 .cse3))) (+ c_~N~0 1)))) .cse5) (let ((.cse6 (select |c_#memory_int| c_~q~0.base)) (.cse7 (* 4 c_~q_back~0))) (or .cse0 (not (<= 0 c_~q_back~0)) (not (= (select .cse6 (+ c_~q~0.offset .cse7)) 1)) (and (forall ((v_ArrVal_754 (Array Int Int))) (< (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) c_~q~0.base))) (+ c_~s~0 (select .cse8 .cse2) (select .cse8 .cse3))) 3)) (forall ((v_ArrVal_754 (Array Int Int))) (< 1 (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) c_~q~0.base))) (+ c_~s~0 (select .cse9 .cse2) (select .cse9 .cse3)))))) (not (< c_~q_back~0 c_~n~0)) (not (= (select .cse6 (+ c_~q~0.offset .cse7 4)) 1)) .cse5))))) is different from false [2022-12-13 18:16:27,790 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~q_front~0 4)) (.cse10 (+ c_~q_front~0 2))) (let ((.cse0 (<= c_~n~0 .cse10)) (.cse7 (+ .cse1 c_~q~0.offset 4)) (.cse6 (+ .cse1 c_~q~0.offset)) (.cse4 (+ c_~N~0 1)) (.cse2 (< .cse10 0))) (and (or .cse0 (and (< c_~s~0 1) (< 0 (+ c_~s~0 1)) (= .cse1 (* 4 c_~q_back~0)) (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (< (+ 3 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse2) (or .cse0 (let ((.cse3 (let ((.cse5 (select |c_#memory_int| c_~q~0.base))) (+ c_~s~0 (select .cse5 .cse6) (select .cse5 .cse7))))) (and (< .cse3 .cse4) (<= c_~N~0 .cse3))) .cse2) (or .cse0 (and (forall ((v_ArrVal_754 (Array Int Int))) (<= c_~N~0 (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) c_~q~0.base))) (+ c_~s~0 (select .cse8 .cse7) (select .cse8 .cse6))))) (forall ((v_ArrVal_754 (Array Int Int))) (< (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_754) c_~q~0.base))) (+ c_~s~0 (select .cse9 .cse7) (select .cse9 .cse6))) .cse4))) .cse2)))) is different from false [2022-12-13 18:16:39,295 WARN L233 SmtUtils]: Spent 8.41s on a formula simplification. DAG size of input: 102 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:17:06,262 WARN L233 SmtUtils]: Spent 8.49s on a formula simplification. DAG size of input: 120 DAG size of output: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:17:11,090 INFO L130 PetriNetUnfolder]: 2639/5277 cut-off events. [2022-12-13 18:17:11,090 INFO L131 PetriNetUnfolder]: For 54730/54730 co-relation queries the response was YES. [2022-12-13 18:17:11,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40107 conditions, 5277 events. 2639/5277 cut-off events. For 54730/54730 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 42102 event pairs, 120 based on Foata normal form. 574/5812 useless extension candidates. Maximal degree in co-relation 40019. Up to 1952 conditions per place. [2022-12-13 18:17:11,118 INFO L137 encePairwiseOnDemand]: 259/271 looper letters, 240 selfloop transitions, 229 changer transitions 869/1339 dead transitions. [2022-12-13 18:17:11,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 1339 transitions, 23893 flow [2022-12-13 18:17:11,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-13 18:17:11,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-12-13 18:17:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 4640 transitions. [2022-12-13 18:17:11,123 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29019951216461315 [2022-12-13 18:17:11,123 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 4640 transitions. [2022-12-13 18:17:11,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 4640 transitions. [2022-12-13 18:17:11,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:17:11,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 4640 transitions. [2022-12-13 18:17:11,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 78.64406779661017) internal successors, (4640), 59 states have internal predecessors, (4640), 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 18:17:11,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 271.0) internal successors, (16260), 60 states have internal predecessors, (16260), 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 18:17:11,134 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 271.0) internal successors, (16260), 60 states have internal predecessors, (16260), 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 18:17:11,134 INFO L175 Difference]: Start difference. First operand has 265 places, 724 transitions, 12139 flow. Second operand 59 states and 4640 transitions. [2022-12-13 18:17:11,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 1339 transitions, 23893 flow [2022-12-13 18:17:11,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 1339 transitions, 23454 flow, removed 184 selfloop flow, removed 17 redundant places. [2022-12-13 18:17:11,609 INFO L231 Difference]: Finished difference. Result has 321 places, 404 transitions, 7322 flow [2022-12-13 18:17:11,609 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=11347, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=7322, PETRI_PLACES=321, PETRI_TRANSITIONS=404} [2022-12-13 18:17:11,609 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 300 predicate places. [2022-12-13 18:17:11,609 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 404 transitions, 7322 flow [2022-12-13 18:17:11,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 75.45) internal successors, (3018), 40 states have internal predecessors, (3018), 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 18:17:11,610 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:17:11,610 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:17:11,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 18:17:11,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:17:11,811 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:17:11,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:11,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1888224459, now seen corresponding path program 15 times [2022-12-13 18:17:11,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:17:11,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460036058] [2022-12-13 18:17:11,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:11,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:17:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:12,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:17:12,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460036058] [2022-12-13 18:17:12,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460036058] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:17:12,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034553515] [2022-12-13 18:17:12,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:17:12,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:17:12,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:17:12,758 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:17:12,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 18:17:12,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 18:17:12,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:17:12,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 18:17:12,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:13,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:17:13,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-12-13 18:17:13,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:13,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 12 [2022-12-13 18:17:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:17:13,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:17:13,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:13,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 140 [2022-12-13 18:17:13,613 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:13,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2022-12-13 18:17:13,620 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:13,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 53 [2022-12-13 18:17:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:17:13,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034553515] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:17:13,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:17:13,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 30 [2022-12-13 18:17:13,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658918709] [2022-12-13 18:17:13,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:17:13,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 18:17:13,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:17:13,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 18:17:13,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=904, Unknown=1, NotChecked=0, Total=992 [2022-12-13 18:17:15,119 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 271 [2022-12-13 18:17:15,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 404 transitions, 7322 flow. Second operand has 32 states, 32 states have (on average 78.6875) internal successors, (2518), 32 states have internal predecessors, (2518), 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 18:17:15,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:17:15,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 271 [2022-12-13 18:17:15,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:17:17,035 INFO L130 PetriNetUnfolder]: 776/1818 cut-off events. [2022-12-13 18:17:17,035 INFO L131 PetriNetUnfolder]: For 26221/26221 co-relation queries the response was YES. [2022-12-13 18:17:17,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14929 conditions, 1818 events. 776/1818 cut-off events. For 26221/26221 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13046 event pairs, 79 based on Foata normal form. 6/1809 useless extension candidates. Maximal degree in co-relation 14825. Up to 1286 conditions per place. [2022-12-13 18:17:17,048 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 310 selfloop transitions, 142 changer transitions 43/496 dead transitions. [2022-12-13 18:17:17,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 496 transitions, 9394 flow [2022-12-13 18:17:17,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 18:17:17,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 18:17:17,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2203 transitions. [2022-12-13 18:17:17,051 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3010796774634413 [2022-12-13 18:17:17,051 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2203 transitions. [2022-12-13 18:17:17,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2203 transitions. [2022-12-13 18:17:17,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:17:17,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2203 transitions. [2022-12-13 18:17:17,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 81.5925925925926) internal successors, (2203), 27 states have internal predecessors, (2203), 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 18:17:17,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 271.0) internal successors, (7588), 28 states have internal predecessors, (7588), 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 18:17:17,065 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 271.0) internal successors, (7588), 28 states have internal predecessors, (7588), 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 18:17:17,065 INFO L175 Difference]: Start difference. First operand has 321 places, 404 transitions, 7322 flow. Second operand 27 states and 2203 transitions. [2022-12-13 18:17:17,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 496 transitions, 9394 flow [2022-12-13 18:17:17,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 496 transitions, 8614 flow, removed 281 selfloop flow, removed 37 redundant places. [2022-12-13 18:17:17,214 INFO L231 Difference]: Finished difference. Result has 280 places, 414 transitions, 7248 flow [2022-12-13 18:17:17,214 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=6613, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7248, PETRI_PLACES=280, PETRI_TRANSITIONS=414} [2022-12-13 18:17:17,215 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 259 predicate places. [2022-12-13 18:17:17,215 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 414 transitions, 7248 flow [2022-12-13 18:17:17,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 78.6875) internal successors, (2518), 32 states have internal predecessors, (2518), 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 18:17:17,215 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:17:17,215 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:17:17,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 18:17:17,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:17:17,417 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:17:17,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:17,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1351795075, now seen corresponding path program 16 times [2022-12-13 18:17:17,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:17:17,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697264018] [2022-12-13 18:17:17,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:17,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:17:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:18,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:17:18,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697264018] [2022-12-13 18:17:18,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697264018] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:17:18,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46076668] [2022-12-13 18:17:18,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:17:18,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:17:18,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:17:18,392 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:17:18,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 18:17:18,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:17:18,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:17:18,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-13 18:17:18,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:18,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:17:18,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-12-13 18:17:18,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:18,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 12 [2022-12-13 18:17:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:17:18,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:17:19,135 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:19,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 186 [2022-12-13 18:17:19,149 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:19,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 136 [2022-12-13 18:17:19,164 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:19,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 116 [2022-12-13 18:17:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:17:19,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46076668] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:17:19,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:17:19,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 31 [2022-12-13 18:17:19,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878982786] [2022-12-13 18:17:19,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:17:19,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 18:17:19,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:17:19,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 18:17:19,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=954, Unknown=12, NotChecked=0, Total=1056 [2022-12-13 18:17:21,455 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 271 [2022-12-13 18:17:21,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 414 transitions, 7248 flow. Second operand has 33 states, 33 states have (on average 78.60606060606061) internal successors, (2594), 33 states have internal predecessors, (2594), 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 18:17:21,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:17:21,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 271 [2022-12-13 18:17:21,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:17:24,287 INFO L130 PetriNetUnfolder]: 793/1837 cut-off events. [2022-12-13 18:17:24,287 INFO L131 PetriNetUnfolder]: For 22513/22513 co-relation queries the response was YES. [2022-12-13 18:17:24,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14444 conditions, 1837 events. 793/1837 cut-off events. For 22513/22513 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12930 event pairs, 91 based on Foata normal form. 5/1837 useless extension candidates. Maximal degree in co-relation 14350. Up to 1256 conditions per place. [2022-12-13 18:17:24,300 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 323 selfloop transitions, 163 changer transitions 38/525 dead transitions. [2022-12-13 18:17:24,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 525 transitions, 9504 flow [2022-12-13 18:17:24,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 18:17:24,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-13 18:17:24,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2932 transitions. [2022-12-13 18:17:24,315 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3005330053300533 [2022-12-13 18:17:24,315 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2932 transitions. [2022-12-13 18:17:24,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2932 transitions. [2022-12-13 18:17:24,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:17:24,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2932 transitions. [2022-12-13 18:17:24,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 81.44444444444444) internal successors, (2932), 36 states have internal predecessors, (2932), 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 18:17:24,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 271.0) internal successors, (10027), 37 states have internal predecessors, (10027), 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 18:17:24,322 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 271.0) internal successors, (10027), 37 states have internal predecessors, (10027), 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 18:17:24,322 INFO L175 Difference]: Start difference. First operand has 280 places, 414 transitions, 7248 flow. Second operand 36 states and 2932 transitions. [2022-12-13 18:17:24,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 525 transitions, 9504 flow [2022-12-13 18:17:24,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 525 transitions, 9169 flow, removed 80 selfloop flow, removed 21 redundant places. [2022-12-13 18:17:24,448 INFO L231 Difference]: Finished difference. Result has 294 places, 426 transitions, 7546 flow [2022-12-13 18:17:24,448 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=6969, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=7546, PETRI_PLACES=294, PETRI_TRANSITIONS=426} [2022-12-13 18:17:24,448 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 273 predicate places. [2022-12-13 18:17:24,448 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 426 transitions, 7546 flow [2022-12-13 18:17:24,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 78.60606060606061) internal successors, (2594), 33 states have internal predecessors, (2594), 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 18:17:24,449 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:17:24,449 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:17:24,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-13 18:17:24,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 18:17:24,650 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:17:24,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:24,650 INFO L85 PathProgramCache]: Analyzing trace with hash -143375801, now seen corresponding path program 17 times [2022-12-13 18:17:24,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:17:24,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739454416] [2022-12-13 18:17:24,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:24,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:17:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:25,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:17:25,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739454416] [2022-12-13 18:17:25,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739454416] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:17:25,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920982959] [2022-12-13 18:17:25,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:17:25,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:17:25,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:17:25,672 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:17:25,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 18:17:25,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 18:17:25,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:17:25,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 69 conjunts are in the unsatisfiable core [2022-12-13 18:17:25,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:26,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:17:26,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-12-13 18:17:26,267 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:26,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 12 [2022-12-13 18:17:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:26,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:17:26,733 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:26,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 140 [2022-12-13 18:17:26,742 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:26,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2022-12-13 18:17:26,749 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:26,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 53 [2022-12-13 18:17:27,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:27,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920982959] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:17:27,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:17:27,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 37 [2022-12-13 18:17:27,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026080736] [2022-12-13 18:17:27,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:17:27,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 18:17:27,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:17:27,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 18:17:27,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1261, Unknown=2, NotChecked=0, Total=1482 [2022-12-13 18:17:29,301 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 271 [2022-12-13 18:17:29,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 426 transitions, 7546 flow. Second operand has 39 states, 39 states have (on average 78.48717948717949) internal successors, (3061), 39 states have internal predecessors, (3061), 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 18:17:29,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:17:29,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 271 [2022-12-13 18:17:29,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:17:43,165 WARN L233 SmtUtils]: Spent 8.89s on a formula simplification. DAG size of input: 121 DAG size of output: 109 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:17:46,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:17:48,167 INFO L130 PetriNetUnfolder]: 747/1824 cut-off events. [2022-12-13 18:17:48,168 INFO L131 PetriNetUnfolder]: For 21721/21721 co-relation queries the response was YES. [2022-12-13 18:17:48,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14458 conditions, 1824 events. 747/1824 cut-off events. For 21721/21721 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 13341 event pairs, 81 based on Foata normal form. 61/1880 useless extension candidates. Maximal degree in co-relation 14362. Up to 966 conditions per place. [2022-12-13 18:17:48,179 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 225 selfloop transitions, 124 changer transitions 164/514 dead transitions. [2022-12-13 18:17:48,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 514 transitions, 9569 flow [2022-12-13 18:17:48,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 18:17:48,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-12-13 18:17:48,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3234 transitions. [2022-12-13 18:17:48,182 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29833948339483396 [2022-12-13 18:17:48,182 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3234 transitions. [2022-12-13 18:17:48,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3234 transitions. [2022-12-13 18:17:48,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:17:48,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3234 transitions. [2022-12-13 18:17:48,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 80.85) internal successors, (3234), 40 states have internal predecessors, (3234), 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 18:17:48,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 271.0) internal successors, (11111), 41 states have internal predecessors, (11111), 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 18:17:48,189 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 271.0) internal successors, (11111), 41 states have internal predecessors, (11111), 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 18:17:48,189 INFO L175 Difference]: Start difference. First operand has 294 places, 426 transitions, 7546 flow. Second operand 40 states and 3234 transitions. [2022-12-13 18:17:48,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 514 transitions, 9569 flow [2022-12-13 18:17:48,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 514 transitions, 9175 flow, removed 89 selfloop flow, removed 24 redundant places. [2022-12-13 18:17:48,312 INFO L231 Difference]: Finished difference. Result has 309 places, 320 transitions, 5982 flow [2022-12-13 18:17:48,312 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=6697, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=5982, PETRI_PLACES=309, PETRI_TRANSITIONS=320} [2022-12-13 18:17:48,312 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2022-12-13 18:17:48,312 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 320 transitions, 5982 flow [2022-12-13 18:17:48,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 78.48717948717949) internal successors, (3061), 39 states have internal predecessors, (3061), 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 18:17:48,312 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:17:48,313 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:17:48,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 18:17:48,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 18:17:48,514 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:17:48,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:48,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1055450476, now seen corresponding path program 18 times [2022-12-13 18:17:48,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:17:48,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388080753] [2022-12-13 18:17:48,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:48,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:17:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:49,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:17:49,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388080753] [2022-12-13 18:17:49,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388080753] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:17:49,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612741087] [2022-12-13 18:17:49,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:17:49,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:17:49,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:17:49,867 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:17:49,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 18:17:49,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 18:17:49,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:17:50,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-13 18:17:50,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:50,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:17:50,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-12-13 18:17:50,417 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:50,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 12 [2022-12-13 18:17:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:17:50,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:17:50,788 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse7 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse7 c_~q~0.offset 4)) (.cse3 (+ c_~q~0.offset (* 4 c_~q_back~0))) (.cse4 (+ .cse7 c_~q~0.offset))) (and (forall ((v_ArrVal_914 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_914) c_~q~0.base))) (let ((.cse0 (select .cse1 .cse4))) (or (= .cse0 0) (< (+ c_~s~0 (select .cse1 .cse2) .cse0) (+ 2 |c_thread1Thread1of1ForFork1_~i~0#1|)) (not (= 1 (select .cse1 .cse3))))))) (forall ((v_ArrVal_914 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_914) c_~q~0.base))) (let ((.cse5 (select .cse6 .cse4))) (or (= .cse5 0) (< |c_thread1Thread1of1ForFork1_~i~0#1| (+ c_~s~0 (select .cse6 .cse2) .cse5)) (not (= 1 (select .cse6 .cse3)))))))))) is different from false [2022-12-13 18:17:50,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:50,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 252 treesize of output 228 [2022-12-13 18:17:50,843 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:50,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 171 treesize of output 172 [2022-12-13 18:17:50,862 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:50,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 146 [2022-12-13 18:17:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 18:17:51,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612741087] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:17:51,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:17:51,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 34 [2022-12-13 18:17:51,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795237428] [2022-12-13 18:17:51,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:17:51,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 18:17:51,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:17:51,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 18:17:51,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1088, Unknown=1, NotChecked=66, Total=1260 [2022-12-13 18:17:51,471 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 271 [2022-12-13 18:17:51,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 320 transitions, 5982 flow. Second operand has 36 states, 36 states have (on average 78.61111111111111) internal successors, (2830), 36 states have internal predecessors, (2830), 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 18:17:51,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:17:51,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 271 [2022-12-13 18:17:51,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:17:53,780 INFO L130 PetriNetUnfolder]: 618/1367 cut-off events. [2022-12-13 18:17:53,780 INFO L131 PetriNetUnfolder]: For 19678/19678 co-relation queries the response was YES. [2022-12-13 18:17:53,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11817 conditions, 1367 events. 618/1367 cut-off events. For 19678/19678 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8526 event pairs, 51 based on Foata normal form. 3/1366 useless extension candidates. Maximal degree in co-relation 11714. Up to 852 conditions per place. [2022-12-13 18:17:53,796 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 250 selfloop transitions, 166 changer transitions 6/423 dead transitions. [2022-12-13 18:17:53,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 423 transitions, 8350 flow [2022-12-13 18:17:53,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 18:17:53,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 18:17:53,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2440 transitions. [2022-12-13 18:17:53,799 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3001230012300123 [2022-12-13 18:17:53,799 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2440 transitions. [2022-12-13 18:17:53,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2440 transitions. [2022-12-13 18:17:53,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:17:53,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2440 transitions. [2022-12-13 18:17:53,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 81.33333333333333) internal successors, (2440), 30 states have internal predecessors, (2440), 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 18:17:53,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 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 18:17:53,804 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 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 18:17:53,804 INFO L175 Difference]: Start difference. First operand has 309 places, 320 transitions, 5982 flow. Second operand 30 states and 2440 transitions. [2022-12-13 18:17:53,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 423 transitions, 8350 flow [2022-12-13 18:17:53,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 423 transitions, 7969 flow, removed 80 selfloop flow, removed 38 redundant places. [2022-12-13 18:17:53,917 INFO L231 Difference]: Finished difference. Result has 272 places, 360 transitions, 7038 flow [2022-12-13 18:17:53,918 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=5605, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=7038, PETRI_PLACES=272, PETRI_TRANSITIONS=360} [2022-12-13 18:17:53,918 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 251 predicate places. [2022-12-13 18:17:53,918 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 360 transitions, 7038 flow [2022-12-13 18:17:53,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 78.61111111111111) internal successors, (2830), 36 states have internal predecessors, (2830), 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 18:17:53,918 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:17:53,918 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:17:53,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 18:17:54,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 18:17:54,120 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:17:54,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:54,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1686990866, now seen corresponding path program 19 times [2022-12-13 18:17:54,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:17:54,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471028168] [2022-12-13 18:17:54,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:54,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:17:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:17:55,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:17:55,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471028168] [2022-12-13 18:17:55,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471028168] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:17:55,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659682098] [2022-12-13 18:17:55,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 18:17:55,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:17:55,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:17:55,439 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:17:55,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 18:17:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:55,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 18:17:55,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:55,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:17:55,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-12-13 18:17:55,887 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:55,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 12 [2022-12-13 18:17:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:17:55,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:17:56,339 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:56,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 259 treesize of output 226 [2022-12-13 18:17:56,348 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:56,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 139 [2022-12-13 18:17:56,357 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:17:56,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 113 [2022-12-13 18:17:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 18:17:56,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659682098] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:17:56,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:17:56,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 32 [2022-12-13 18:17:56,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146790114] [2022-12-13 18:17:56,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:17:56,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 18:17:56,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:17:56,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 18:17:56,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1022, Unknown=1, NotChecked=0, Total=1122 [2022-12-13 18:17:57,607 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 271 [2022-12-13 18:17:57,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 360 transitions, 7038 flow. Second operand has 34 states, 34 states have (on average 78.6470588235294) internal successors, (2674), 34 states have internal predecessors, (2674), 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 18:17:57,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:17:57,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 271 [2022-12-13 18:17:57,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:17:59,507 INFO L130 PetriNetUnfolder]: 652/1445 cut-off events. [2022-12-13 18:17:59,507 INFO L131 PetriNetUnfolder]: For 20626/20626 co-relation queries the response was YES. [2022-12-13 18:17:59,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12267 conditions, 1445 events. 652/1445 cut-off events. For 20626/20626 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9206 event pairs, 30 based on Foata normal form. 2/1433 useless extension candidates. Maximal degree in co-relation 12175. Up to 838 conditions per place. [2022-12-13 18:17:59,518 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 236 selfloop transitions, 187 changer transitions 4/428 dead transitions. [2022-12-13 18:17:59,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 428 transitions, 8519 flow [2022-12-13 18:17:59,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 18:17:59,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 18:17:59,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2117 transitions. [2022-12-13 18:17:59,520 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3004541583877377 [2022-12-13 18:17:59,520 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2117 transitions. [2022-12-13 18:17:59,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2117 transitions. [2022-12-13 18:17:59,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:17:59,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2117 transitions. [2022-12-13 18:17:59,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 81.42307692307692) internal successors, (2117), 26 states have internal predecessors, (2117), 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 18:17:59,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 271.0) internal successors, (7317), 27 states have internal predecessors, (7317), 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 18:17:59,537 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 271.0) internal successors, (7317), 27 states have internal predecessors, (7317), 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 18:17:59,537 INFO L175 Difference]: Start difference. First operand has 272 places, 360 transitions, 7038 flow. Second operand 26 states and 2117 transitions. [2022-12-13 18:17:59,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 428 transitions, 8519 flow [2022-12-13 18:17:59,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 428 transitions, 8322 flow, removed 22 selfloop flow, removed 15 redundant places. [2022-12-13 18:17:59,634 INFO L231 Difference]: Finished difference. Result has 285 places, 374 transitions, 7514 flow [2022-12-13 18:17:59,634 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=6841, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7514, PETRI_PLACES=285, PETRI_TRANSITIONS=374} [2022-12-13 18:17:59,635 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 264 predicate places. [2022-12-13 18:17:59,635 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 374 transitions, 7514 flow [2022-12-13 18:17:59,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 78.6470588235294) internal successors, (2674), 34 states have internal predecessors, (2674), 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 18:17:59,635 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:17:59,635 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:17:59,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 18:17:59,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:17:59,837 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:17:59,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:59,838 INFO L85 PathProgramCache]: Analyzing trace with hash -2095407461, now seen corresponding path program 20 times [2022-12-13 18:17:59,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:17:59,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708901157] [2022-12-13 18:17:59,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:59,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:17:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 18:17:59,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:17:59,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708901157] [2022-12-13 18:17:59,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708901157] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:17:59,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122090568] [2022-12-13 18:17:59,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:17:59,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:17:59,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:17:59,950 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:17:59,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 18:18:00,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:18:00,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:18:00,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 18:18:00,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:18:00,064 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 18:18:00,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:18:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 18:18:00,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122090568] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:18:00,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:18:00,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 12 [2022-12-13 18:18:00,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082209152] [2022-12-13 18:18:00,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:18:00,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 18:18:00,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:18:00,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 18:18:00,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-12-13 18:18:00,177 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 271 [2022-12-13 18:18:00,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 374 transitions, 7514 flow. Second operand has 13 states, 13 states have (on average 118.53846153846153) internal successors, (1541), 13 states have internal predecessors, (1541), 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 18:18:00,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:18:00,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 271 [2022-12-13 18:18:00,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:18:00,669 INFO L130 PetriNetUnfolder]: 791/1685 cut-off events. [2022-12-13 18:18:00,669 INFO L131 PetriNetUnfolder]: For 23576/23588 co-relation queries the response was YES. [2022-12-13 18:18:00,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14354 conditions, 1685 events. 791/1685 cut-off events. For 23576/23588 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10764 event pairs, 34 based on Foata normal form. 14/1639 useless extension candidates. Maximal degree in co-relation 14260. Up to 630 conditions per place. [2022-12-13 18:18:00,682 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 115 selfloop transitions, 256 changer transitions 67/449 dead transitions. [2022-12-13 18:18:00,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 449 transitions, 9285 flow [2022-12-13 18:18:00,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:18:00,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 18:18:00,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 755 transitions. [2022-12-13 18:18:00,683 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46432964329643295 [2022-12-13 18:18:00,683 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 755 transitions. [2022-12-13 18:18:00,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 755 transitions. [2022-12-13 18:18:00,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:18:00,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 755 transitions. [2022-12-13 18:18:00,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 125.83333333333333) internal successors, (755), 6 states have internal predecessors, (755), 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 18:18:00,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 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 18:18:00,685 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 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 18:18:00,685 INFO L175 Difference]: Start difference. First operand has 285 places, 374 transitions, 7514 flow. Second operand 6 states and 755 transitions. [2022-12-13 18:18:00,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 449 transitions, 9285 flow [2022-12-13 18:18:00,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 449 transitions, 9031 flow, removed 11 selfloop flow, removed 17 redundant places. [2022-12-13 18:18:00,807 INFO L231 Difference]: Finished difference. Result has 274 places, 352 transitions, 7133 flow [2022-12-13 18:18:00,808 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=7260, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7133, PETRI_PLACES=274, PETRI_TRANSITIONS=352} [2022-12-13 18:18:00,808 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 253 predicate places. [2022-12-13 18:18:00,808 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 352 transitions, 7133 flow [2022-12-13 18:18:00,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 118.53846153846153) internal successors, (1541), 13 states have internal predecessors, (1541), 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 18:18:00,808 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:18:00,808 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:18:00,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 18:18:01,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 18:18:01,010 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:18:01,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:18:01,011 INFO L85 PathProgramCache]: Analyzing trace with hash 2119461617, now seen corresponding path program 21 times [2022-12-13 18:18:01,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:18:01,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733654784] [2022-12-13 18:18:01,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:18:01,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:18:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:18:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 18:18:01,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:18:01,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733654784] [2022-12-13 18:18:01,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733654784] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:18:01,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408375932] [2022-12-13 18:18:01,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:18:01,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:18:01,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:18:01,164 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:18:01,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 18:18:01,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 18:18:01,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:18:01,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 18:18:01,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:18:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:18:01,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:18:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:18:01,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408375932] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:18:01,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:18:01,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2022-12-13 18:18:01,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617482870] [2022-12-13 18:18:01,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:18:01,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 18:18:01,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:18:01,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 18:18:01,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2022-12-13 18:18:01,800 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 271 [2022-12-13 18:18:01,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 352 transitions, 7133 flow. Second operand has 27 states, 27 states have (on average 111.81481481481481) internal successors, (3019), 27 states have internal predecessors, (3019), 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 18:18:01,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:18:01,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 271 [2022-12-13 18:18:01,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:18:02,450 INFO L130 PetriNetUnfolder]: 791/1637 cut-off events. [2022-12-13 18:18:02,451 INFO L131 PetriNetUnfolder]: For 24501/24513 co-relation queries the response was YES. [2022-12-13 18:18:02,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14931 conditions, 1637 events. 791/1637 cut-off events. For 24501/24513 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10020 event pairs, 182 based on Foata normal form. 122/1688 useless extension candidates. Maximal degree in co-relation 14835. Up to 916 conditions per place. [2022-12-13 18:18:02,475 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 328 selfloop transitions, 50 changer transitions 81/467 dead transitions. [2022-12-13 18:18:02,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 467 transitions, 9880 flow [2022-12-13 18:18:02,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 18:18:02,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 18:18:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1834 transitions. [2022-12-13 18:18:02,477 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42297047970479706 [2022-12-13 18:18:02,477 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1834 transitions. [2022-12-13 18:18:02,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1834 transitions. [2022-12-13 18:18:02,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:18:02,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1834 transitions. [2022-12-13 18:18:02,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 114.625) internal successors, (1834), 16 states have internal predecessors, (1834), 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 18:18:02,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 271.0) internal successors, (4607), 17 states have internal predecessors, (4607), 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 18:18:02,480 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 271.0) internal successors, (4607), 17 states have internal predecessors, (4607), 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 18:18:02,480 INFO L175 Difference]: Start difference. First operand has 274 places, 352 transitions, 7133 flow. Second operand 16 states and 1834 transitions. [2022-12-13 18:18:02,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 467 transitions, 9880 flow [2022-12-13 18:18:02,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 467 transitions, 9223 flow, removed 233 selfloop flow, removed 15 redundant places. [2022-12-13 18:18:02,598 INFO L231 Difference]: Finished difference. Result has 239 places, 310 transitions, 6373 flow [2022-12-13 18:18:02,598 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=6158, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6373, PETRI_PLACES=239, PETRI_TRANSITIONS=310} [2022-12-13 18:18:02,599 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 218 predicate places. [2022-12-13 18:18:02,599 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 310 transitions, 6373 flow [2022-12-13 18:18:02,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 111.81481481481481) internal successors, (3019), 27 states have internal predecessors, (3019), 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 18:18:02,599 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:18:02,599 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:18:02,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 18:18:02,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 18:18:02,800 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:18:02,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:18:02,800 INFO L85 PathProgramCache]: Analyzing trace with hash 845095627, now seen corresponding path program 22 times [2022-12-13 18:18:02,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:18:02,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811323273] [2022-12-13 18:18:02,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:18:02,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:18:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:18:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:18:03,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:18:03,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811323273] [2022-12-13 18:18:03,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811323273] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:18:03,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964132628] [2022-12-13 18:18:03,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:18:03,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:18:03,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:18:03,187 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:18:03,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 18:18:03,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:18:03,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:18:03,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 18:18:03,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:18:03,393 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:18:03,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:18:03,463 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-12-13 18:18:03,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2022-12-13 18:18:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 18:18:03,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964132628] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:18:03,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:18:03,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 23 [2022-12-13 18:18:03,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842076999] [2022-12-13 18:18:03,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:18:03,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 18:18:03,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:18:03,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 18:18:03,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-12-13 18:18:04,174 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 271 [2022-12-13 18:18:04,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 310 transitions, 6373 flow. Second operand has 24 states, 24 states have (on average 105.91666666666667) internal successors, (2542), 24 states have internal predecessors, (2542), 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 18:18:04,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:18:04,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 271 [2022-12-13 18:18:04,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:18:05,529 INFO L130 PetriNetUnfolder]: 854/1678 cut-off events. [2022-12-13 18:18:05,529 INFO L131 PetriNetUnfolder]: For 23308/23314 co-relation queries the response was YES. [2022-12-13 18:18:05,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14411 conditions, 1678 events. 854/1678 cut-off events. For 23308/23314 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9992 event pairs, 40 based on Foata normal form. 82/1662 useless extension candidates. Maximal degree in co-relation 14320. Up to 777 conditions per place. [2022-12-13 18:18:05,543 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 237 selfloop transitions, 292 changer transitions 3/540 dead transitions. [2022-12-13 18:18:05,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 540 transitions, 10037 flow [2022-12-13 18:18:05,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 18:18:05,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-13 18:18:05,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3942 transitions. [2022-12-13 18:18:05,546 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4040590405904059 [2022-12-13 18:18:05,546 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3942 transitions. [2022-12-13 18:18:05,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3942 transitions. [2022-12-13 18:18:05,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:18:05,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3942 transitions. [2022-12-13 18:18:05,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 109.5) internal successors, (3942), 36 states have internal predecessors, (3942), 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 18:18:05,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 271.0) internal successors, (10027), 37 states have internal predecessors, (10027), 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 18:18:05,554 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 271.0) internal successors, (10027), 37 states have internal predecessors, (10027), 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 18:18:05,554 INFO L175 Difference]: Start difference. First operand has 239 places, 310 transitions, 6373 flow. Second operand 36 states and 3942 transitions. [2022-12-13 18:18:05,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 540 transitions, 10037 flow [2022-12-13 18:18:05,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 540 transitions, 9547 flow, removed 130 selfloop flow, removed 22 redundant places. [2022-12-13 18:18:05,660 INFO L231 Difference]: Finished difference. Result has 227 places, 386 transitions, 7980 flow [2022-12-13 18:18:05,660 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=5984, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=7980, PETRI_PLACES=227, PETRI_TRANSITIONS=386} [2022-12-13 18:18:05,660 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 206 predicate places. [2022-12-13 18:18:05,660 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 386 transitions, 7980 flow [2022-12-13 18:18:05,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 105.91666666666667) internal successors, (2542), 24 states have internal predecessors, (2542), 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 18:18:05,661 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:18:05,661 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:18:05,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-13 18:18:05,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:18:05,862 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:18:05,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:18:05,863 INFO L85 PathProgramCache]: Analyzing trace with hash -823286421, now seen corresponding path program 23 times [2022-12-13 18:18:05,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:18:05,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60597083] [2022-12-13 18:18:05,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:18:05,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:18:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:18:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:18:06,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:18:06,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60597083] [2022-12-13 18:18:06,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60597083] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:18:06,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548555452] [2022-12-13 18:18:06,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:18:06,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:18:06,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:18:06,390 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:18:06,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 18:18:06,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 18:18:06,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:18:06,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 18:18:06,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:18:06,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:18:06,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-12-13 18:18:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:18:06,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:18:06,750 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1122 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1122) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 8)) 0))) is different from false [2022-12-13 18:18:06,758 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:18:06,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 44 [2022-12-13 18:18:06,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2022-12-13 18:18:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 18:18:06,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548555452] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:18:06,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:18:06,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2022-12-13 18:18:06,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318975221] [2022-12-13 18:18:06,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:18:06,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 18:18:06,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:18:06,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 18:18:06,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=841, Unknown=1, NotChecked=58, Total=992 [2022-12-13 18:18:06,913 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 271 [2022-12-13 18:18:06,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 386 transitions, 7980 flow. Second operand has 32 states, 32 states have (on average 89.6875) internal successors, (2870), 32 states have internal predecessors, (2870), 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 18:18:06,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:18:06,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 271 [2022-12-13 18:18:06,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:18:08,565 INFO L130 PetriNetUnfolder]: 869/1705 cut-off events. [2022-12-13 18:18:08,565 INFO L131 PetriNetUnfolder]: For 23538/23544 co-relation queries the response was YES. [2022-12-13 18:18:08,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15072 conditions, 1705 events. 869/1705 cut-off events. For 23538/23544 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10109 event pairs, 11 based on Foata normal form. 36/1629 useless extension candidates. Maximal degree in co-relation 14983. Up to 797 conditions per place. [2022-12-13 18:18:08,577 INFO L137 encePairwiseOnDemand]: 264/271 looper letters, 164 selfloop transitions, 303 changer transitions 1/476 dead transitions. [2022-12-13 18:18:08,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 476 transitions, 9702 flow [2022-12-13 18:18:08,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 18:18:08,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 18:18:08,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2504 transitions. [2022-12-13 18:18:08,580 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34221675550088837 [2022-12-13 18:18:08,580 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2504 transitions. [2022-12-13 18:18:08,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2504 transitions. [2022-12-13 18:18:08,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:18:08,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2504 transitions. [2022-12-13 18:18:08,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 92.74074074074075) internal successors, (2504), 27 states have internal predecessors, (2504), 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 18:18:08,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 271.0) internal successors, (7588), 28 states have internal predecessors, (7588), 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 18:18:08,588 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 271.0) internal successors, (7588), 28 states have internal predecessors, (7588), 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 18:18:08,588 INFO L175 Difference]: Start difference. First operand has 227 places, 386 transitions, 7980 flow. Second operand 27 states and 2504 transitions. [2022-12-13 18:18:08,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 476 transitions, 9702 flow [2022-12-13 18:18:08,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 476 transitions, 8690 flow, removed 226 selfloop flow, removed 16 redundant places. [2022-12-13 18:18:08,706 INFO L231 Difference]: Finished difference. Result has 241 places, 393 transitions, 7807 flow [2022-12-13 18:18:08,706 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=6983, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7807, PETRI_PLACES=241, PETRI_TRANSITIONS=393} [2022-12-13 18:18:08,707 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 220 predicate places. [2022-12-13 18:18:08,707 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 393 transitions, 7807 flow [2022-12-13 18:18:08,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 89.6875) internal successors, (2870), 32 states have internal predecessors, (2870), 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 18:18:08,707 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:18:08,707 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:18:08,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 18:18:08,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-13 18:18:08,908 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:18:08,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:18:08,908 INFO L85 PathProgramCache]: Analyzing trace with hash 2085504362, now seen corresponding path program 24 times [2022-12-13 18:18:08,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:18:08,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512214106] [2022-12-13 18:18:08,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:18:08,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:18:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:18:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:18:09,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:18:09,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512214106] [2022-12-13 18:18:09,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512214106] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:18:09,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782647299] [2022-12-13 18:18:09,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:18:09,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:18:09,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:18:09,999 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:18:10,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 18:18:10,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 18:18:10,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:18:10,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 78 conjunts are in the unsatisfiable core [2022-12-13 18:18:10,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:18:10,951 INFO L321 Elim1Store]: treesize reduction 50, result has 46.2 percent of original size [2022-12-13 18:18:10,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 58 [2022-12-13 18:18:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:18:11,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:18:12,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:18:12,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 142 treesize of output 388 [2022-12-13 18:18:13,336 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 18:18:14,033 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-13 18:18:15,765 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 18:18:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:18:23,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782647299] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:18:23,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:18:23,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 44 [2022-12-13 18:18:23,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314736830] [2022-12-13 18:18:23,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:18:23,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-13 18:18:23,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:18:23,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-13 18:18:23,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1786, Unknown=0, NotChecked=0, Total=2070 [2022-12-13 18:18:27,348 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 271 [2022-12-13 18:18:27,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 393 transitions, 7807 flow. Second operand has 46 states, 46 states have (on average 95.45652173913044) internal successors, (4391), 46 states have internal predecessors, (4391), 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 18:18:27,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:18:27,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 271 [2022-12-13 18:18:27,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:18:33,826 WARN L233 SmtUtils]: Spent 5.31s on a formula simplification. DAG size of input: 123 DAG size of output: 117 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:18:41,670 WARN L233 SmtUtils]: Spent 7.53s on a formula simplification. DAG size of input: 117 DAG size of output: 111 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:18:49,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:18:51,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:18:53,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:19:01,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:19:03,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:19:05,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:19:07,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:19:09,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:19:11,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:19:13,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:19:15,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:19:16,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:19:17,373 INFO L130 PetriNetUnfolder]: 934/1880 cut-off events. [2022-12-13 18:19:17,373 INFO L131 PetriNetUnfolder]: For 22005/22005 co-relation queries the response was YES. [2022-12-13 18:19:17,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15888 conditions, 1880 events. 934/1880 cut-off events. For 22005/22005 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11658 event pairs, 126 based on Foata normal form. 2/1772 useless extension candidates. Maximal degree in co-relation 15799. Up to 1511 conditions per place. [2022-12-13 18:19:17,387 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 376 selfloop transitions, 85 changer transitions 33/495 dead transitions. [2022-12-13 18:19:17,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 495 transitions, 9806 flow [2022-12-13 18:19:17,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 18:19:17,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 18:19:17,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3150 transitions. [2022-12-13 18:19:17,390 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3632380073800738 [2022-12-13 18:19:17,390 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3150 transitions. [2022-12-13 18:19:17,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3150 transitions. [2022-12-13 18:19:17,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:19:17,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3150 transitions. [2022-12-13 18:19:17,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 98.4375) internal successors, (3150), 32 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:19:17,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 271.0) internal successors, (8943), 33 states have internal predecessors, (8943), 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 18:19:17,395 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 271.0) internal successors, (8943), 33 states have internal predecessors, (8943), 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 18:19:17,396 INFO L175 Difference]: Start difference. First operand has 241 places, 393 transitions, 7807 flow. Second operand 32 states and 3150 transitions. [2022-12-13 18:19:17,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 495 transitions, 9806 flow [2022-12-13 18:19:17,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 495 transitions, 9399 flow, removed 87 selfloop flow, removed 14 redundant places. [2022-12-13 18:19:17,514 INFO L231 Difference]: Finished difference. Result has 273 places, 415 transitions, 8060 flow [2022-12-13 18:19:17,514 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=7435, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=8060, PETRI_PLACES=273, PETRI_TRANSITIONS=415} [2022-12-13 18:19:17,514 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 252 predicate places. [2022-12-13 18:19:17,515 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 415 transitions, 8060 flow [2022-12-13 18:19:17,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 95.45652173913044) internal successors, (4391), 46 states have internal predecessors, (4391), 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 18:19:17,515 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:19:17,515 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:19:17,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 18:19:17,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-13 18:19:17,717 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:19:17,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:19:17,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1309485642, now seen corresponding path program 25 times [2022-12-13 18:19:17,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:19:17,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736060377] [2022-12-13 18:19:17,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:19:17,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:19:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:19:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:19:19,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:19:19,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736060377] [2022-12-13 18:19:19,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736060377] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:19:19,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761043677] [2022-12-13 18:19:19,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 18:19:19,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:19:19,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:19:19,005 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:19:19,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 18:19:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:19:19,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 70 conjunts are in the unsatisfiable core [2022-12-13 18:19:19,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:19:20,147 INFO L321 Elim1Store]: treesize reduction 86, result has 7.5 percent of original size [2022-12-13 18:19:20,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 22 [2022-12-13 18:19:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:19:20,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:19:20,759 INFO L321 Elim1Store]: treesize reduction 36, result has 77.1 percent of original size [2022-12-13 18:19:20,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 152 [2022-12-13 18:19:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:19:21,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761043677] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:19:21,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:19:21,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 43 [2022-12-13 18:19:21,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143793995] [2022-12-13 18:19:21,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:19:21,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-13 18:19:21,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:19:21,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-13 18:19:21,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1713, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 18:19:25,215 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 271 [2022-12-13 18:19:25,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 415 transitions, 8060 flow. Second operand has 45 states, 45 states have (on average 91.4888888888889) internal successors, (4117), 45 states have internal predecessors, (4117), 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 18:19:25,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:19:25,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 271 [2022-12-13 18:19:25,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:19:29,987 INFO L130 PetriNetUnfolder]: 924/1863 cut-off events. [2022-12-13 18:19:29,987 INFO L131 PetriNetUnfolder]: For 22152/22152 co-relation queries the response was YES. [2022-12-13 18:19:29,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15545 conditions, 1863 events. 924/1863 cut-off events. For 22152/22152 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11597 event pairs, 193 based on Foata normal form. 1/1754 useless extension candidates. Maximal degree in co-relation 15442. Up to 1174 conditions per place. [2022-12-13 18:19:30,002 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 371 selfloop transitions, 127 changer transitions 18/517 dead transitions. [2022-12-13 18:19:30,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 517 transitions, 10013 flow [2022-12-13 18:19:30,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 18:19:30,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-13 18:19:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2744 transitions. [2022-12-13 18:19:30,004 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3491538363659499 [2022-12-13 18:19:30,004 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2744 transitions. [2022-12-13 18:19:30,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2744 transitions. [2022-12-13 18:19:30,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:19:30,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2744 transitions. [2022-12-13 18:19:30,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 94.62068965517241) internal successors, (2744), 29 states have internal predecessors, (2744), 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 18:19:30,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 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 18:19:30,010 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 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 18:19:30,010 INFO L175 Difference]: Start difference. First operand has 273 places, 415 transitions, 8060 flow. Second operand 29 states and 2744 transitions. [2022-12-13 18:19:30,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 517 transitions, 10013 flow [2022-12-13 18:19:30,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 517 transitions, 9688 flow, removed 81 selfloop flow, removed 16 redundant places. [2022-12-13 18:19:30,154 INFO L231 Difference]: Finished difference. Result has 284 places, 427 transitions, 8328 flow [2022-12-13 18:19:30,154 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=7781, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8328, PETRI_PLACES=284, PETRI_TRANSITIONS=427} [2022-12-13 18:19:30,155 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 263 predicate places. [2022-12-13 18:19:30,155 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 427 transitions, 8328 flow [2022-12-13 18:19:30,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 91.4888888888889) internal successors, (4117), 45 states have internal predecessors, (4117), 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 18:19:30,155 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:19:30,155 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:19:30,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 18:19:30,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 18:19:30,357 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:19:30,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:19:30,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1427310364, now seen corresponding path program 26 times [2022-12-13 18:19:30,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:19:30,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443723754] [2022-12-13 18:19:30,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:19:30,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:19:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:19:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:19:31,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:19:31,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443723754] [2022-12-13 18:19:31,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443723754] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:19:31,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71970032] [2022-12-13 18:19:31,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:19:31,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:19:31,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:19:31,471 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:19:31,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 18:19:31,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:19:31,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:19:31,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-13 18:19:31,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:19:31,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 18:19:31,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 18:19:31,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 18:19:31,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 18:19:31,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 18:19:31,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 18:19:32,668 INFO L321 Elim1Store]: treesize reduction 90, result has 7.2 percent of original size [2022-12-13 18:19:32,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 22 [2022-12-13 18:19:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:19:32,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:19:50,533 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:19:50,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 322 treesize of output 157 [2022-12-13 18:19:50,626 INFO L321 Elim1Store]: treesize reduction 36, result has 77.1 percent of original size [2022-12-13 18:19:50,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 760 treesize of output 780 [2022-12-13 18:19:50,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:19:50,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:19:50,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:19:50,698 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:19:50,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 538 treesize of output 582 [2022-12-13 18:19:50,797 INFO L321 Elim1Store]: treesize reduction 36, result has 77.1 percent of original size [2022-12-13 18:19:50,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 584 treesize of output 552 [2022-12-13 18:20:00,130 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:20:00,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 322 treesize of output 157 [2022-12-13 18:20:00,183 INFO L321 Elim1Store]: treesize reduction 144, result has 8.3 percent of original size [2022-12-13 18:20:00,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 760 treesize of output 672 [2022-12-13 18:20:00,237 INFO L321 Elim1Store]: treesize reduction 144, result has 8.3 percent of original size [2022-12-13 18:20:00,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 660 treesize of output 520 [2022-12-13 18:20:00,287 INFO L321 Elim1Store]: treesize reduction 144, result has 8.3 percent of original size [2022-12-13 18:20:00,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 508 treesize of output 444 [2022-12-13 18:20:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:02,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71970032] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:20:02,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:20:02,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 46 [2022-12-13 18:20:02,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045777673] [2022-12-13 18:20:02,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:20:02,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 18:20:02,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:20:02,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 18:20:02,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1927, Unknown=8, NotChecked=0, Total=2256 [2022-12-13 18:20:04,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:20:06,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:20:09,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:20:11,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:20:13,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:20:16,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:20:18,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:20:20,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:20:22,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:20:22,912 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 271 [2022-12-13 18:20:22,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 427 transitions, 8328 flow. Second operand has 48 states, 48 states have (on average 75.39583333333333) internal successors, (3619), 48 states have internal predecessors, (3619), 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 18:20:22,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:20:22,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 271 [2022-12-13 18:20:22,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:20:46,421 WARN L233 SmtUtils]: Spent 22.40s on a formula simplification that was a NOOP. DAG size: 118 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:20:48,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:03,787 WARN L233 SmtUtils]: Spent 14.64s on a formula simplification. DAG size of input: 143 DAG size of output: 124 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:21:06,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:09,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:21:45,082 WARN L233 SmtUtils]: Spent 34.46s on a formula simplification. DAG size of input: 128 DAG size of output: 119 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:21:57,804 WARN L233 SmtUtils]: Spent 12.48s on a formula simplification. DAG size of input: 134 DAG size of output: 115 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:22:26,630 WARN L233 SmtUtils]: Spent 28.63s on a formula simplification. DAG size of input: 141 DAG size of output: 132 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:22:29,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:22:31,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:22:34,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:22:46,783 WARN L233 SmtUtils]: Spent 12.49s on a formula simplification. DAG size of input: 147 DAG size of output: 128 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:22:48,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:22:58,045 WARN L233 SmtUtils]: Spent 8.44s on a formula simplification. DAG size of input: 139 DAG size of output: 125 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:23:00,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:23:01,962 INFO L130 PetriNetUnfolder]: 944/1915 cut-off events. [2022-12-13 18:23:01,962 INFO L131 PetriNetUnfolder]: For 22062/22062 co-relation queries the response was YES. [2022-12-13 18:23:01,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15897 conditions, 1915 events. 944/1915 cut-off events. For 22062/22062 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12086 event pairs, 224 based on Foata normal form. 1/1806 useless extension candidates. Maximal degree in co-relation 15796. Up to 1174 conditions per place. [2022-12-13 18:23:01,976 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 416 selfloop transitions, 115 changer transitions 23/555 dead transitions. [2022-12-13 18:23:01,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 555 transitions, 10522 flow [2022-12-13 18:23:01,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-13 18:23:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-12-13 18:23:01,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3517 transitions. [2022-12-13 18:23:01,979 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28839688396883967 [2022-12-13 18:23:01,979 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3517 transitions. [2022-12-13 18:23:01,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3517 transitions. [2022-12-13 18:23:01,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:23:01,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3517 transitions. [2022-12-13 18:23:01,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 78.15555555555555) internal successors, (3517), 45 states have internal predecessors, (3517), 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 18:23:01,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 271.0) internal successors, (12466), 46 states have internal predecessors, (12466), 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 18:23:01,987 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 271.0) internal successors, (12466), 46 states have internal predecessors, (12466), 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 18:23:01,987 INFO L175 Difference]: Start difference. First operand has 284 places, 427 transitions, 8328 flow. Second operand 45 states and 3517 transitions. [2022-12-13 18:23:01,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 555 transitions, 10522 flow [2022-12-13 18:23:02,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 555 transitions, 10402 flow, removed 30 selfloop flow, removed 15 redundant places. [2022-12-13 18:23:02,130 INFO L231 Difference]: Finished difference. Result has 317 places, 440 transitions, 8760 flow [2022-12-13 18:23:02,131 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=8226, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=8760, PETRI_PLACES=317, PETRI_TRANSITIONS=440} [2022-12-13 18:23:02,131 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 296 predicate places. [2022-12-13 18:23:02,131 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 440 transitions, 8760 flow [2022-12-13 18:23:02,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 75.39583333333333) internal successors, (3619), 48 states have internal predecessors, (3619), 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 18:23:02,131 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:23:02,131 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:23:02,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-13 18:23:02,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-13 18:23:02,333 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:23:02,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:23:02,334 INFO L85 PathProgramCache]: Analyzing trace with hash -751495516, now seen corresponding path program 27 times [2022-12-13 18:23:02,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:23:02,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371109484] [2022-12-13 18:23:02,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:23:02,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:23:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:23:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:23:03,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:23:03,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371109484] [2022-12-13 18:23:03,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371109484] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:23:03,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797368957] [2022-12-13 18:23:03,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:23:03,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:23:03,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:23:03,337 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:23:03,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 18:23:03,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 18:23:03,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:23:03,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 92 conjunts are in the unsatisfiable core [2022-12-13 18:23:03,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:23:03,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 18:23:03,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 18:23:03,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 18:23:03,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 18:23:04,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:23:04,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 16 [2022-12-13 18:23:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:23:04,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:23:05,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:23:05,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 228 treesize of output 133 [2022-12-13 18:23:05,701 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:23:05,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 368 treesize of output 436 [2022-12-13 18:23:05,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:23:05,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 316 treesize of output 356 [2022-12-13 18:23:05,802 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:23:05,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 207 treesize of output 287 [2022-12-13 18:23:11,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:23:11,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 228 treesize of output 133 [2022-12-13 18:23:11,666 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-12-13 18:23:11,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 776 treesize of output 684 [2022-12-13 18:23:11,699 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-12-13 18:23:11,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 672 treesize of output 604 [2022-12-13 18:23:11,732 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-12-13 18:23:11,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 592 treesize of output 444 [2022-12-13 18:23:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:23:12,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797368957] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:23:12,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:23:12,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 44 [2022-12-13 18:23:12,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237329864] [2022-12-13 18:23:12,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:23:12,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-13 18:23:12,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:23:12,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-13 18:23:12,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1726, Unknown=5, NotChecked=0, Total=2070 [2022-12-13 18:23:12,565 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 271 [2022-12-13 18:23:12,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 440 transitions, 8760 flow. Second operand has 46 states, 46 states have (on average 75.45652173913044) internal successors, (3471), 46 states have internal predecessors, (3471), 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 18:23:12,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:23:12,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 271 [2022-12-13 18:23:12,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:23:15,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:23:18,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:23:22,865 INFO L130 PetriNetUnfolder]: 1101/2233 cut-off events. [2022-12-13 18:23:22,865 INFO L131 PetriNetUnfolder]: For 26908/26908 co-relation queries the response was YES. [2022-12-13 18:23:22,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19157 conditions, 2233 events. 1101/2233 cut-off events. For 26908/26908 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14486 event pairs, 138 based on Foata normal form. 2/2105 useless extension candidates. Maximal degree in co-relation 19052. Up to 1500 conditions per place. [2022-12-13 18:23:22,894 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 402 selfloop transitions, 221 changer transitions 30/654 dead transitions. [2022-12-13 18:23:22,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 654 transitions, 12705 flow [2022-12-13 18:23:22,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-13 18:23:22,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-12-13 18:23:22,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4081 transitions. [2022-12-13 18:23:22,899 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28959693443088275 [2022-12-13 18:23:22,899 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4081 transitions. [2022-12-13 18:23:22,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4081 transitions. [2022-12-13 18:23:22,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:23:22,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4081 transitions. [2022-12-13 18:23:22,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 78.48076923076923) internal successors, (4081), 52 states have internal predecessors, (4081), 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 18:23:22,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 271.0) internal successors, (14363), 53 states have internal predecessors, (14363), 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 18:23:22,923 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 271.0) internal successors, (14363), 53 states have internal predecessors, (14363), 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 18:23:22,923 INFO L175 Difference]: Start difference. First operand has 317 places, 440 transitions, 8760 flow. Second operand 52 states and 4081 transitions. [2022-12-13 18:23:22,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 654 transitions, 12705 flow [2022-12-13 18:23:23,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 654 transitions, 12476 flow, removed 57 selfloop flow, removed 24 redundant places. [2022-12-13 18:23:23,120 INFO L231 Difference]: Finished difference. Result has 353 places, 510 transitions, 10661 flow [2022-12-13 18:23:23,121 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=8539, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=10661, PETRI_PLACES=353, PETRI_TRANSITIONS=510} [2022-12-13 18:23:23,121 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 332 predicate places. [2022-12-13 18:23:23,121 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 510 transitions, 10661 flow [2022-12-13 18:23:23,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 75.45652173913044) internal successors, (3471), 46 states have internal predecessors, (3471), 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 18:23:23,121 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:23:23,121 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:23:23,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 18:23:23,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:23:23,323 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:23:23,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:23:23,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1037919562, now seen corresponding path program 28 times [2022-12-13 18:23:23,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:23:23,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947263797] [2022-12-13 18:23:23,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:23:23,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:23:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:23:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:23:24,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:23:24,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947263797] [2022-12-13 18:23:24,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947263797] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:23:24,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772718653] [2022-12-13 18:23:24,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:23:24,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:23:24,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:23:24,421 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:23:24,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 18:23:24,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:23:24,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:23:24,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 79 conjunts are in the unsatisfiable core [2022-12-13 18:23:24,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:23:25,348 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:23:25,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 16 [2022-12-13 18:23:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:23:25,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:23:25,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:23:25,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 110 treesize of output 152 [2022-12-13 18:23:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:23:26,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772718653] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:23:26,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:23:26,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 42 [2022-12-13 18:23:26,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541463163] [2022-12-13 18:23:26,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:23:26,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 18:23:26,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:23:26,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 18:23:26,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1607, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 18:23:29,220 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 271 [2022-12-13 18:23:29,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 510 transitions, 10661 flow. Second operand has 44 states, 44 states have (on average 95.52272727272727) internal successors, (4203), 44 states have internal predecessors, (4203), 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 18:23:29,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:23:29,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 271 [2022-12-13 18:23:29,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:23:32,611 INFO L130 PetriNetUnfolder]: 1097/2217 cut-off events. [2022-12-13 18:23:32,611 INFO L131 PetriNetUnfolder]: For 29226/29226 co-relation queries the response was YES. [2022-12-13 18:23:32,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19827 conditions, 2217 events. 1097/2217 cut-off events. For 29226/29226 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 14347 event pairs, 156 based on Foata normal form. 2/2139 useless extension candidates. Maximal degree in co-relation 19708. Up to 1701 conditions per place. [2022-12-13 18:23:32,641 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 390 selfloop transitions, 171 changer transitions 29/591 dead transitions. [2022-12-13 18:23:32,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 591 transitions, 12567 flow [2022-12-13 18:23:32,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 18:23:32,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-13 18:23:32,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3053 transitions. [2022-12-13 18:23:32,645 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36340911796214737 [2022-12-13 18:23:32,645 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3053 transitions. [2022-12-13 18:23:32,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3053 transitions. [2022-12-13 18:23:32,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:23:32,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3053 transitions. [2022-12-13 18:23:32,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 98.48387096774194) internal successors, (3053), 31 states have internal predecessors, (3053), 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 18:23:32,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 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 18:23:32,653 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 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 18:23:32,654 INFO L175 Difference]: Start difference. First operand has 353 places, 510 transitions, 10661 flow. Second operand 31 states and 3053 transitions. [2022-12-13 18:23:32,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 591 transitions, 12567 flow [2022-12-13 18:23:32,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 591 transitions, 12222 flow, removed 101 selfloop flow, removed 29 redundant places. [2022-12-13 18:23:32,972 INFO L231 Difference]: Finished difference. Result has 352 places, 512 transitions, 10870 flow [2022-12-13 18:23:32,973 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=10332, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=10870, PETRI_PLACES=352, PETRI_TRANSITIONS=512} [2022-12-13 18:23:32,973 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 331 predicate places. [2022-12-13 18:23:32,973 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 512 transitions, 10870 flow [2022-12-13 18:23:32,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 95.52272727272727) internal successors, (4203), 44 states have internal predecessors, (4203), 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 18:23:32,974 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:23:32,974 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:23:32,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-13 18:23:33,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 18:23:33,175 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:23:33,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:23:33,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1819540510, now seen corresponding path program 29 times [2022-12-13 18:23:33,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:23:33,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249280802] [2022-12-13 18:23:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:23:33,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:23:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:23:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:23:34,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:23:34,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249280802] [2022-12-13 18:23:34,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249280802] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:23:34,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607015231] [2022-12-13 18:23:34,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:23:34,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:23:34,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:23:34,328 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:23:34,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 18:23:34,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 18:23:34,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:23:34,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 82 conjunts are in the unsatisfiable core [2022-12-13 18:23:34,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:23:35,169 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:23:35,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 16 [2022-12-13 18:23:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:23:35,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:23:35,780 INFO L321 Elim1Store]: treesize reduction 14, result has 88.4 percent of original size [2022-12-13 18:23:35,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 121 treesize of output 141 [2022-12-13 18:23:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:23:36,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607015231] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:23:36,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:23:36,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 42 [2022-12-13 18:23:36,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225449863] [2022-12-13 18:23:36,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:23:36,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 18:23:36,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:23:36,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 18:23:36,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 18:23:38,860 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 271 [2022-12-13 18:23:38,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 512 transitions, 10870 flow. Second operand has 44 states, 44 states have (on average 95.47727272727273) internal successors, (4201), 44 states have internal predecessors, (4201), 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 18:23:38,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:23:38,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 271 [2022-12-13 18:23:38,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:23:47,617 INFO L130 PetriNetUnfolder]: 1130/2314 cut-off events. [2022-12-13 18:23:47,617 INFO L131 PetriNetUnfolder]: For 31698/31698 co-relation queries the response was YES. [2022-12-13 18:23:47,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20757 conditions, 2314 events. 1130/2314 cut-off events. For 31698/31698 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15384 event pairs, 102 based on Foata normal form. 2/2236 useless extension candidates. Maximal degree in co-relation 20638. Up to 1365 conditions per place. [2022-12-13 18:23:47,636 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 410 selfloop transitions, 244 changer transitions 19/674 dead transitions. [2022-12-13 18:23:47,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 674 transitions, 13681 flow [2022-12-13 18:23:47,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-13 18:23:47,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-12-13 18:23:47,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 5703 transitions. [2022-12-13 18:23:47,639 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36283242142766253 [2022-12-13 18:23:47,639 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 5703 transitions. [2022-12-13 18:23:47,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 5703 transitions. [2022-12-13 18:23:47,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:23:47,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 5703 transitions. [2022-12-13 18:23:47,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 98.32758620689656) internal successors, (5703), 58 states have internal predecessors, (5703), 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 18:23:47,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 271.0) internal successors, (15989), 59 states have internal predecessors, (15989), 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 18:23:47,650 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 271.0) internal successors, (15989), 59 states have internal predecessors, (15989), 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 18:23:47,650 INFO L175 Difference]: Start difference. First operand has 352 places, 512 transitions, 10870 flow. Second operand 58 states and 5703 transitions. [2022-12-13 18:23:47,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 674 transitions, 13681 flow [2022-12-13 18:23:47,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 674 transitions, 13437 flow, removed 53 selfloop flow, removed 20 redundant places. [2022-12-13 18:23:47,894 INFO L231 Difference]: Finished difference. Result has 393 places, 527 transitions, 11561 flow [2022-12-13 18:23:47,894 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=10658, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=11561, PETRI_PLACES=393, PETRI_TRANSITIONS=527} [2022-12-13 18:23:47,895 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 372 predicate places. [2022-12-13 18:23:47,895 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 527 transitions, 11561 flow [2022-12-13 18:23:47,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 95.47727272727273) internal successors, (4201), 44 states have internal predecessors, (4201), 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 18:23:47,895 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:23:47,895 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:23:47,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-13 18:23:48,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 18:23:48,096 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 18:23:48,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:23:48,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1155744284, now seen corresponding path program 30 times [2022-12-13 18:23:48,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:23:48,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856364507] [2022-12-13 18:23:48,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:23:48,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:23:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:23:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:23:49,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:23:49,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856364507] [2022-12-13 18:23:49,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856364507] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:23:49,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738258306] [2022-12-13 18:23:49,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:23:49,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:23:49,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:23:49,274 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:23:49,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2f3946-0799-45f8-9550-d0a3a924aab9/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 18:23:49,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 18:23:49,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:23:49,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 95 conjunts are in the unsatisfiable core [2022-12-13 18:23:49,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:23:49,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 18:23:49,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 18:23:49,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 18:23:49,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 18:23:49,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 18:23:50,380 INFO L321 Elim1Store]: treesize reduction 54, result has 41.9 percent of original size [2022-12-13 18:23:50,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 54 [2022-12-13 18:23:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:23:50,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:23:53,824 INFO L321 Elim1Store]: treesize reduction 136, result has 47.9 percent of original size [2022-12-13 18:23:53,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 581 treesize of output 403 [2022-12-13 18:23:53,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:23:54,082 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:23:54,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1216 treesize of output 1406 [2022-12-13 18:23:54,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:23:54,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:23:54,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 1065 treesize of output 1132 [2022-12-13 18:23:54,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:23:54,391 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:23:54,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 989 treesize of output 980 [2022-12-13 18:23:54,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:23:54,548 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:23:54,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 837 treesize of output 904 [2022-12-13 18:23:55,121 INFO L321 Elim1Store]: treesize reduction 14, result has 95.6 percent of original size [2022-12-13 18:23:55,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 808 treesize of output 1064 [2022-12-13 18:23:55,421 INFO L321 Elim1Store]: treesize reduction 14, result has 91.1 percent of original size [2022-12-13 18:23:55,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 723 treesize of output 828