./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro --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 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca --- 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-8393723 [2022-11-18 20:19:38,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:19:38,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:19:38,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:19:38,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:19:38,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:19:38,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:19:38,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:19:38,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:19:38,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:19:38,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:19:38,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:19:38,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:19:38,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:19:38,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:19:38,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:19:38,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:19:38,247 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:19:38,249 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:19:38,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:19:38,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:19:38,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:19:38,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:19:38,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:19:38,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:19:38,295 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:19:38,295 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:19:38,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:19:38,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:19:38,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:19:38,299 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:19:38,300 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:19:38,301 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:19:38,302 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:19:38,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:19:38,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:19:38,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:19:38,310 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:19:38,310 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:19:38,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:19:38,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:19:38,315 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:19:38,355 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:19:38,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:19:38,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:19:38,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:19:38,360 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:19:38,360 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:19:38,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:19:38,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:19:38,361 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:19:38,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:19:38,363 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:19:38,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:19:38,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:19:38,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:19:38,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:19:38,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:19:38,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:19:38,365 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:19:38,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:19:38,365 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:19:38,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:19:38,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:19:38,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:19:38,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:19:38,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:19:38,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:19:38,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:19:38,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:19:38,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:19:38,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:19:38,371 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:19:38,375 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:19:38,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:19:38,376 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca [2022-11-18 20:19:38,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:19:38,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:19:38,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:19:38,824 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:19:38,826 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:19:38,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2022-11-18 20:19:38,915 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/data/9a090da64/6acaf9ab97574c65a303cd8d8f486b7a/FLAG6ac490481 [2022-11-18 20:19:39,485 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:19:39,486 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2022-11-18 20:19:39,495 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/data/9a090da64/6acaf9ab97574c65a303cd8d8f486b7a/FLAG6ac490481 [2022-11-18 20:19:39,834 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/data/9a090da64/6acaf9ab97574c65a303cd8d8f486b7a [2022-11-18 20:19:39,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:19:39,839 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:19:39,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:19:39,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:19:39,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:19:39,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:19:39" (1/1) ... [2022-11-18 20:19:39,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@785be456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:39, skipping insertion in model container [2022-11-18 20:19:39,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:19:39" (1/1) ... [2022-11-18 20:19:39,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:19:39,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:19:40,198 WARN L234 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_89c50e31-e97e-433d-9abf-db116e7e9509/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c[2474,2487] [2022-11-18 20:19:40,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:19:40,240 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:19:40,290 WARN L234 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_89c50e31-e97e-433d-9abf-db116e7e9509/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c[2474,2487] [2022-11-18 20:19:40,294 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:19:40,310 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:19:40,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:40 WrapperNode [2022-11-18 20:19:40,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:19:40,312 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:19:40,312 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:19:40,312 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:19:40,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:40" (1/1) ... [2022-11-18 20:19:40,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:40" (1/1) ... [2022-11-18 20:19:40,364 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 141 [2022-11-18 20:19:40,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:19:40,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:19:40,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:19:40,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:19:40,381 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:40" (1/1) ... [2022-11-18 20:19:40,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:40" (1/1) ... [2022-11-18 20:19:40,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:40" (1/1) ... [2022-11-18 20:19:40,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:40" (1/1) ... [2022-11-18 20:19:40,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:40" (1/1) ... [2022-11-18 20:19:40,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:40" (1/1) ... [2022-11-18 20:19:40,401 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:40" (1/1) ... [2022-11-18 20:19:40,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:40" (1/1) ... [2022-11-18 20:19:40,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:19:40,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:19:40,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:19:40,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:19:40,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:40" (1/1) ... [2022-11-18 20:19:40,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:19:40,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:40,471 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:19:40,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:19:40,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:19:40,517 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 20:19:40,518 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 20:19:40,518 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 20:19:40,518 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 20:19:40,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:19:40,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:19:40,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:19:40,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:19:40,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:19:40,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:19:40,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:19:40,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:19:40,522 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:19:40,652 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:19:40,654 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:19:41,092 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:19:41,104 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:19:41,104 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 20:19:41,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:19:41 BoogieIcfgContainer [2022-11-18 20:19:41,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:19:41,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:19:41,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:19:41,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:19:41,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:19:39" (1/3) ... [2022-11-18 20:19:41,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f0a9d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:19:41, skipping insertion in model container [2022-11-18 20:19:41,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:40" (2/3) ... [2022-11-18 20:19:41,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f0a9d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:19:41, skipping insertion in model container [2022-11-18 20:19:41,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:19:41" (3/3) ... [2022-11-18 20:19:41,120 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2022-11-18 20:19:41,131 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:19:41,145 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:19:41,145 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:19:41,146 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:19:41,264 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 20:19:41,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 179 transitions, 374 flow [2022-11-18 20:19:41,512 INFO L130 PetriNetUnfolder]: 15/177 cut-off events. [2022-11-18 20:19:41,513 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:19:41,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 177 events. 15/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 220 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2022-11-18 20:19:41,521 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 179 transitions, 374 flow [2022-11-18 20:19:41,542 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 168 transitions, 348 flow [2022-11-18 20:19:41,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:19:41,578 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;@21a501fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:19:41,579 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-18 20:19:41,629 INFO L130 PetriNetUnfolder]: 14/164 cut-off events. [2022-11-18 20:19:41,629 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:19:41,630 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:19:41,631 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:41,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:19:41,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:41,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1767862099, now seen corresponding path program 1 times [2022-11-18 20:19:41,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:41,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557999199] [2022-11-18 20:19:41,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:41,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:42,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:42,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:42,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557999199] [2022-11-18 20:19:42,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557999199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:42,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:19:42,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:19:42,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916801594] [2022-11-18 20:19:42,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:42,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:19:42,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:42,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:19:42,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:19:42,204 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 179 [2022-11-18 20:19:42,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 168 transitions, 348 flow. Second operand has 2 states, 2 states have (on average 166.5) internal successors, (333), 2 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:42,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:19:42,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 179 [2022-11-18 20:19:42,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:19:42,301 INFO L130 PetriNetUnfolder]: 4/157 cut-off events. [2022-11-18 20:19:42,301 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-18 20:19:42,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 157 events. 4/157 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 202 event pairs, 0 based on Foata normal form. 14/159 useless extension candidates. Maximal degree in co-relation 97. Up to 5 conditions per place. [2022-11-18 20:19:42,307 INFO L137 encePairwiseOnDemand]: 168/179 looper letters, 4 selfloop transitions, 0 changer transitions 4/157 dead transitions. [2022-11-18 20:19:42,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 157 transitions, 334 flow [2022-11-18 20:19:42,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:19:42,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:19:42,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 341 transitions. [2022-11-18 20:19:42,334 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.952513966480447 [2022-11-18 20:19:42,336 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 341 transitions. [2022-11-18 20:19:42,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 341 transitions. [2022-11-18 20:19:42,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:42,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 341 transitions. [2022-11-18 20:19:42,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 170.5) internal successors, (341), 2 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:42,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:42,370 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:42,372 INFO L175 Difference]: Start difference. First operand has 160 places, 168 transitions, 348 flow. Second operand 2 states and 341 transitions. [2022-11-18 20:19:42,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 157 transitions, 334 flow [2022-11-18 20:19:42,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 157 transitions, 326 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 20:19:42,390 INFO L231 Difference]: Finished difference. Result has 157 places, 153 transitions, 310 flow [2022-11-18 20:19:42,393 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=310, PETRI_PLACES=157, PETRI_TRANSITIONS=153} [2022-11-18 20:19:42,398 INFO L288 CegarLoopForPetriNet]: 160 programPoint places, -3 predicate places. [2022-11-18 20:19:42,399 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 153 transitions, 310 flow [2022-11-18 20:19:42,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 166.5) internal successors, (333), 2 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:42,400 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:19:42,401 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:42,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:19:42,402 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:19:42,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:42,405 INFO L85 PathProgramCache]: Analyzing trace with hash -58589972, now seen corresponding path program 1 times [2022-11-18 20:19:42,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:42,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105159116] [2022-11-18 20:19:42,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:42,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:43,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:43,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:43,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105159116] [2022-11-18 20:19:43,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105159116] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:43,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:19:43,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:19:43,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572474608] [2022-11-18 20:19:43,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:43,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:19:43,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:43,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:19:43,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:19:43,165 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 179 [2022-11-18 20:19:43,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 153 transitions, 310 flow. Second operand has 4 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:43,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:19:43,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 179 [2022-11-18 20:19:43,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:19:43,450 INFO L130 PetriNetUnfolder]: 105/567 cut-off events. [2022-11-18 20:19:43,451 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-11-18 20:19:43,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 567 events. 105/567 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2614 event pairs, 29 based on Foata normal form. 0/486 useless extension candidates. Maximal degree in co-relation 753. Up to 111 conditions per place. [2022-11-18 20:19:43,463 INFO L137 encePairwiseOnDemand]: 173/179 looper letters, 30 selfloop transitions, 6 changer transitions 0/170 dead transitions. [2022-11-18 20:19:43,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 170 transitions, 418 flow [2022-11-18 20:19:43,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:19:43,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 20:19:43,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 629 transitions. [2022-11-18 20:19:43,469 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8784916201117319 [2022-11-18 20:19:43,469 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 629 transitions. [2022-11-18 20:19:43,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 629 transitions. [2022-11-18 20:19:43,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:43,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 629 transitions. [2022-11-18 20:19:43,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:43,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:43,478 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:43,479 INFO L175 Difference]: Start difference. First operand has 157 places, 153 transitions, 310 flow. Second operand 4 states and 629 transitions. [2022-11-18 20:19:43,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 170 transitions, 418 flow [2022-11-18 20:19:43,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 170 transitions, 418 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:19:43,488 INFO L231 Difference]: Finished difference. Result has 158 places, 158 transitions, 350 flow [2022-11-18 20:19:43,489 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=350, PETRI_PLACES=158, PETRI_TRANSITIONS=158} [2022-11-18 20:19:43,490 INFO L288 CegarLoopForPetriNet]: 160 programPoint places, -2 predicate places. [2022-11-18 20:19:43,491 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 158 transitions, 350 flow [2022-11-18 20:19:43,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:43,492 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:19:43,493 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:43,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:19:43,494 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:19:43,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:43,496 INFO L85 PathProgramCache]: Analyzing trace with hash 182413954, now seen corresponding path program 1 times [2022-11-18 20:19:43,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:43,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424198467] [2022-11-18 20:19:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:43,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:43,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:43,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424198467] [2022-11-18 20:19:43,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424198467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:43,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:19:43,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:19:43,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884382262] [2022-11-18 20:19:43,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:43,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:19:43,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:43,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:19:43,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:19:43,859 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2022-11-18 20:19:43,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 158 transitions, 350 flow. Second operand has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:43,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:19:43,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2022-11-18 20:19:43,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:19:44,285 INFO L130 PetriNetUnfolder]: 236/1284 cut-off events. [2022-11-18 20:19:44,285 INFO L131 PetriNetUnfolder]: For 130/132 co-relation queries the response was YES. [2022-11-18 20:19:44,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1940 conditions, 1284 events. 236/1284 cut-off events. For 130/132 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 8754 event pairs, 108 based on Foata normal form. 6/1205 useless extension candidates. Maximal degree in co-relation 1934. Up to 256 conditions per place. [2022-11-18 20:19:44,326 INFO L137 encePairwiseOnDemand]: 170/179 looper letters, 60 selfloop transitions, 7 changer transitions 1/199 dead transitions. [2022-11-18 20:19:44,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 199 transitions, 627 flow [2022-11-18 20:19:44,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:19:44,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 20:19:44,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 927 transitions. [2022-11-18 20:19:44,332 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8631284916201117 [2022-11-18 20:19:44,333 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 927 transitions. [2022-11-18 20:19:44,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 927 transitions. [2022-11-18 20:19:44,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:44,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 927 transitions. [2022-11-18 20:19:44,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.5) internal successors, (927), 6 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:44,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:44,341 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:44,341 INFO L175 Difference]: Start difference. First operand has 158 places, 158 transitions, 350 flow. Second operand 6 states and 927 transitions. [2022-11-18 20:19:44,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 199 transitions, 627 flow [2022-11-18 20:19:44,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 199 transitions, 627 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:19:44,349 INFO L231 Difference]: Finished difference. Result has 166 places, 162 transitions, 398 flow [2022-11-18 20:19:44,350 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=398, PETRI_PLACES=166, PETRI_TRANSITIONS=162} [2022-11-18 20:19:44,351 INFO L288 CegarLoopForPetriNet]: 160 programPoint places, 6 predicate places. [2022-11-18 20:19:44,351 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 162 transitions, 398 flow [2022-11-18 20:19:44,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:44,352 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:19:44,353 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:44,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:19:44,353 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:19:44,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:44,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1412251816, now seen corresponding path program 2 times [2022-11-18 20:19:44,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:44,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149632535] [2022-11-18 20:19:44,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:44,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:44,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:44,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149632535] [2022-11-18 20:19:44,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149632535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:44,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:19:44,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:19:44,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028402087] [2022-11-18 20:19:44,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:44,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:19:44,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:44,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:19:44,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:19:44,869 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2022-11-18 20:19:44,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 162 transitions, 398 flow. Second operand has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:44,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:19:44,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2022-11-18 20:19:44,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:19:45,337 INFO L130 PetriNetUnfolder]: 264/1409 cut-off events. [2022-11-18 20:19:45,337 INFO L131 PetriNetUnfolder]: For 392/404 co-relation queries the response was YES. [2022-11-18 20:19:45,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2375 conditions, 1409 events. 264/1409 cut-off events. For 392/404 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 9916 event pairs, 114 based on Foata normal form. 4/1316 useless extension candidates. Maximal degree in co-relation 2365. Up to 263 conditions per place. [2022-11-18 20:19:45,353 INFO L137 encePairwiseOnDemand]: 171/179 looper letters, 59 selfloop transitions, 12 changer transitions 1/203 dead transitions. [2022-11-18 20:19:45,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 203 transitions, 704 flow [2022-11-18 20:19:45,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:19:45,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 20:19:45,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 786 transitions. [2022-11-18 20:19:45,356 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8782122905027933 [2022-11-18 20:19:45,356 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 786 transitions. [2022-11-18 20:19:45,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 786 transitions. [2022-11-18 20:19:45,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:45,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 786 transitions. [2022-11-18 20:19:45,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:45,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:45,369 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:45,369 INFO L175 Difference]: Start difference. First operand has 166 places, 162 transitions, 398 flow. Second operand 5 states and 786 transitions. [2022-11-18 20:19:45,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 203 transitions, 704 flow [2022-11-18 20:19:45,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 203 transitions, 696 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-18 20:19:45,383 INFO L231 Difference]: Finished difference. Result has 171 places, 170 transitions, 496 flow [2022-11-18 20:19:45,384 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=496, PETRI_PLACES=171, PETRI_TRANSITIONS=170} [2022-11-18 20:19:45,385 INFO L288 CegarLoopForPetriNet]: 160 programPoint places, 11 predicate places. [2022-11-18 20:19:45,386 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 170 transitions, 496 flow [2022-11-18 20:19:45,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:45,389 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:19:45,389 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:45,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:19:45,390 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:19:45,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:45,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1019281688, now seen corresponding path program 3 times [2022-11-18 20:19:45,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:45,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497127949] [2022-11-18 20:19:45,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:45,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:45,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:45,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497127949] [2022-11-18 20:19:45,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497127949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:45,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:19:45,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:19:45,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326233361] [2022-11-18 20:19:45,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:45,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:19:45,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:45,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:19:45,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:19:45,875 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2022-11-18 20:19:45,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 170 transitions, 496 flow. Second operand has 6 states, 6 states have (on average 147.16666666666666) internal successors, (883), 6 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:45,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:19:45,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2022-11-18 20:19:45,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:19:46,289 INFO L130 PetriNetUnfolder]: 268/1401 cut-off events. [2022-11-18 20:19:46,289 INFO L131 PetriNetUnfolder]: For 760/768 co-relation queries the response was YES. [2022-11-18 20:19:46,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2545 conditions, 1401 events. 268/1401 cut-off events. For 760/768 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 9894 event pairs, 101 based on Foata normal form. 6/1312 useless extension candidates. Maximal degree in co-relation 2532. Up to 263 conditions per place. [2022-11-18 20:19:46,302 INFO L137 encePairwiseOnDemand]: 170/179 looper letters, 69 selfloop transitions, 17 changer transitions 1/218 dead transitions. [2022-11-18 20:19:46,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 218 transitions, 872 flow [2022-11-18 20:19:46,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:19:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 20:19:46,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 942 transitions. [2022-11-18 20:19:46,306 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8770949720670391 [2022-11-18 20:19:46,306 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 942 transitions. [2022-11-18 20:19:46,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 942 transitions. [2022-11-18 20:19:46,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:46,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 942 transitions. [2022-11-18 20:19:46,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:46,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:46,314 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:46,314 INFO L175 Difference]: Start difference. First operand has 171 places, 170 transitions, 496 flow. Second operand 6 states and 942 transitions. [2022-11-18 20:19:46,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 218 transitions, 872 flow [2022-11-18 20:19:46,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 218 transitions, 860 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-18 20:19:46,326 INFO L231 Difference]: Finished difference. Result has 178 places, 176 transitions, 604 flow [2022-11-18 20:19:46,327 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=604, PETRI_PLACES=178, PETRI_TRANSITIONS=176} [2022-11-18 20:19:46,331 INFO L288 CegarLoopForPetriNet]: 160 programPoint places, 18 predicate places. [2022-11-18 20:19:46,332 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 176 transitions, 604 flow [2022-11-18 20:19:46,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 147.16666666666666) internal successors, (883), 6 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:46,333 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:19:46,333 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:46,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:19:46,334 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:19:46,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:46,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2069370276, now seen corresponding path program 4 times [2022-11-18 20:19:46,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:46,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714694579] [2022-11-18 20:19:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:46,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:46,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:46,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714694579] [2022-11-18 20:19:46,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714694579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:46,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:19:46,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:19:46,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62688577] [2022-11-18 20:19:46,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:46,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:19:46,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:46,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:19:46,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:19:46,753 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2022-11-18 20:19:46,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 176 transitions, 604 flow. Second operand has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:46,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:19:46,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2022-11-18 20:19:46,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:19:47,152 INFO L130 PetriNetUnfolder]: 274/1480 cut-off events. [2022-11-18 20:19:47,152 INFO L131 PetriNetUnfolder]: For 1256/1258 co-relation queries the response was YES. [2022-11-18 20:19:47,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2852 conditions, 1480 events. 274/1480 cut-off events. For 1256/1258 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 10589 event pairs, 100 based on Foata normal form. 6/1387 useless extension candidates. Maximal degree in co-relation 2836. Up to 292 conditions per place. [2022-11-18 20:19:47,165 INFO L137 encePairwiseOnDemand]: 171/179 looper letters, 63 selfloop transitions, 23 changer transitions 1/218 dead transitions. [2022-11-18 20:19:47,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 218 transitions, 1002 flow [2022-11-18 20:19:47,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:19:47,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 20:19:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1076 transitions. [2022-11-18 20:19:47,169 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8587390263367917 [2022-11-18 20:19:47,169 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1076 transitions. [2022-11-18 20:19:47,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1076 transitions. [2022-11-18 20:19:47,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:47,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1076 transitions. [2022-11-18 20:19:47,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 153.71428571428572) internal successors, (1076), 7 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:47,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:47,175 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:47,175 INFO L175 Difference]: Start difference. First operand has 178 places, 176 transitions, 604 flow. Second operand 7 states and 1076 transitions. [2022-11-18 20:19:47,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 218 transitions, 1002 flow [2022-11-18 20:19:47,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 218 transitions, 975 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-18 20:19:47,186 INFO L231 Difference]: Finished difference. Result has 186 places, 181 transitions, 699 flow [2022-11-18 20:19:47,187 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=699, PETRI_PLACES=186, PETRI_TRANSITIONS=181} [2022-11-18 20:19:47,189 INFO L288 CegarLoopForPetriNet]: 160 programPoint places, 26 predicate places. [2022-11-18 20:19:47,189 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 181 transitions, 699 flow [2022-11-18 20:19:47,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:47,190 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:19:47,190 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:47,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 20:19:47,191 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:19:47,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:47,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1203274802, now seen corresponding path program 5 times [2022-11-18 20:19:47,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:47,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068850060] [2022-11-18 20:19:47,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:47,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:47,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:47,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068850060] [2022-11-18 20:19:47,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068850060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:47,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:19:47,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:19:47,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646266224] [2022-11-18 20:19:47,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:47,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:19:47,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:47,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:19:47,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:19:47,496 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2022-11-18 20:19:47,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 181 transitions, 699 flow. Second operand has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:47,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:19:47,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2022-11-18 20:19:47,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:19:47,913 INFO L130 PetriNetUnfolder]: 274/1433 cut-off events. [2022-11-18 20:19:47,914 INFO L131 PetriNetUnfolder]: For 1948/1948 co-relation queries the response was YES. [2022-11-18 20:19:47,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2979 conditions, 1433 events. 274/1433 cut-off events. For 1948/1948 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 10169 event pairs, 102 based on Foata normal form. 3/1337 useless extension candidates. Maximal degree in co-relation 2959. Up to 207 conditions per place. [2022-11-18 20:19:47,925 INFO L137 encePairwiseOnDemand]: 170/179 looper letters, 71 selfloop transitions, 30 changer transitions 1/233 dead transitions. [2022-11-18 20:19:47,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 233 transitions, 1184 flow [2022-11-18 20:19:47,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:19:47,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 20:19:47,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1235 transitions. [2022-11-18 20:19:47,929 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8624301675977654 [2022-11-18 20:19:47,929 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1235 transitions. [2022-11-18 20:19:47,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1235 transitions. [2022-11-18 20:19:47,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:47,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1235 transitions. [2022-11-18 20:19:47,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 154.375) internal successors, (1235), 8 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:47,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:47,936 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:47,937 INFO L175 Difference]: Start difference. First operand has 186 places, 181 transitions, 699 flow. Second operand 8 states and 1235 transitions. [2022-11-18 20:19:47,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 233 transitions, 1184 flow [2022-11-18 20:19:47,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 233 transitions, 1138 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-11-18 20:19:47,954 INFO L231 Difference]: Finished difference. Result has 193 places, 189 transitions, 825 flow [2022-11-18 20:19:47,954 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=825, PETRI_PLACES=193, PETRI_TRANSITIONS=189} [2022-11-18 20:19:47,955 INFO L288 CegarLoopForPetriNet]: 160 programPoint places, 33 predicate places. [2022-11-18 20:19:47,955 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 189 transitions, 825 flow [2022-11-18 20:19:47,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:47,956 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:19:47,956 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:47,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 20:19:47,956 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:19:47,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:47,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1699124613, now seen corresponding path program 1 times [2022-11-18 20:19:47,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:47,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078384573] [2022-11-18 20:19:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:47,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:48,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:48,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078384573] [2022-11-18 20:19:48,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078384573] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:48,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249729251] [2022-11-18 20:19:48,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:48,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:48,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:48,439 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:48,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:19:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:48,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:19:48,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:48,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:48,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:19:48,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249729251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:48,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:19:48,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-11-18 20:19:48,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085786973] [2022-11-18 20:19:48,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:48,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:19:48,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:48,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:19:48,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:19:48,845 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 179 [2022-11-18 20:19:48,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 189 transitions, 825 flow. Second operand has 8 states, 8 states have (on average 134.875) internal successors, (1079), 8 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:48,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:19:48,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 179 [2022-11-18 20:19:48,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:19:49,384 INFO L130 PetriNetUnfolder]: 346/1829 cut-off events. [2022-11-18 20:19:49,384 INFO L131 PetriNetUnfolder]: For 1633/1672 co-relation queries the response was YES. [2022-11-18 20:19:49,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3416 conditions, 1829 events. 346/1829 cut-off events. For 1633/1672 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 14606 event pairs, 124 based on Foata normal form. 9/1681 useless extension candidates. Maximal degree in co-relation 3394. Up to 378 conditions per place. [2022-11-18 20:19:49,401 INFO L137 encePairwiseOnDemand]: 163/179 looper letters, 31 selfloop transitions, 9 changer transitions 18/212 dead transitions. [2022-11-18 20:19:49,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 212 transitions, 993 flow [2022-11-18 20:19:49,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:19:49,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-18 20:19:49,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1380 transitions. [2022-11-18 20:19:49,404 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.770949720670391 [2022-11-18 20:19:49,404 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1380 transitions. [2022-11-18 20:19:49,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1380 transitions. [2022-11-18 20:19:49,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:49,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1380 transitions. [2022-11-18 20:19:49,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 138.0) internal successors, (1380), 10 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:49,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 179.0) internal successors, (1969), 11 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:49,412 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 179.0) internal successors, (1969), 11 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:49,413 INFO L175 Difference]: Start difference. First operand has 193 places, 189 transitions, 825 flow. Second operand 10 states and 1380 transitions. [2022-11-18 20:19:49,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 212 transitions, 993 flow [2022-11-18 20:19:49,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 212 transitions, 961 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-11-18 20:19:49,426 INFO L231 Difference]: Finished difference. Result has 203 places, 190 transitions, 831 flow [2022-11-18 20:19:49,426 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=831, PETRI_PLACES=203, PETRI_TRANSITIONS=190} [2022-11-18 20:19:49,427 INFO L288 CegarLoopForPetriNet]: 160 programPoint places, 43 predicate places. [2022-11-18 20:19:49,427 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 190 transitions, 831 flow [2022-11-18 20:19:49,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 134.875) internal successors, (1079), 8 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:49,428 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:19:49,428 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:49,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-18 20:19:49,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 20:19:49,634 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:19:49,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:49,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1077170863, now seen corresponding path program 1 times [2022-11-18 20:19:49,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:49,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798409792] [2022-11-18 20:19:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:49,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:49,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:19:50,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:50,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798409792] [2022-11-18 20:19:50,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798409792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:50,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667478666] [2022-11-18 20:19:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:50,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:50,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:50,051 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:50,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:19:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:50,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-18 20:19:50,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:51,230 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 20:19:51,231 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2022-11-18 20:19:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:51,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:19:51,697 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:19:51,698 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2022-11-18 20:19:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:53,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667478666] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:19:53,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:19:53,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 19] total 38 [2022-11-18 20:19:53,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555703033] [2022-11-18 20:19:53,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:19:53,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 20:19:53,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:53,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 20:19:53,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1265, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 20:19:53,494 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 179 [2022-11-18 20:19:53,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 190 transitions, 831 flow. Second operand has 38 states, 38 states have (on average 79.07894736842105) internal successors, (3005), 38 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:53,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:19:53,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 179 [2022-11-18 20:19:53,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:03,165 INFO L130 PetriNetUnfolder]: 6080/13337 cut-off events. [2022-11-18 20:20:03,165 INFO L131 PetriNetUnfolder]: For 21208/21208 co-relation queries the response was YES. [2022-11-18 20:20:03,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33112 conditions, 13337 events. 6080/13337 cut-off events. For 21208/21208 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 122295 event pairs, 442 based on Foata normal form. 17/13104 useless extension candidates. Maximal degree in co-relation 33086. Up to 2850 conditions per place. [2022-11-18 20:20:03,299 INFO L137 encePairwiseOnDemand]: 133/179 looper letters, 539 selfloop transitions, 133 changer transitions 257/993 dead transitions. [2022-11-18 20:20:03,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 993 transitions, 6060 flow [2022-11-18 20:20:03,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-11-18 20:20:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-11-18 20:20:03,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 7364 transitions. [2022-11-18 20:20:03,324 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4674961909598781 [2022-11-18 20:20:03,324 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 7364 transitions. [2022-11-18 20:20:03,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 7364 transitions. [2022-11-18 20:20:03,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:03,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 7364 transitions. [2022-11-18 20:20:03,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 83.68181818181819) internal successors, (7364), 88 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:03,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 179.0) internal successors, (15931), 89 states have internal predecessors, (15931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:03,406 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 179.0) internal successors, (15931), 89 states have internal predecessors, (15931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:03,406 INFO L175 Difference]: Start difference. First operand has 203 places, 190 transitions, 831 flow. Second operand 88 states and 7364 transitions. [2022-11-18 20:20:03,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 993 transitions, 6060 flow [2022-11-18 20:20:03,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 993 transitions, 5830 flow, removed 90 selfloop flow, removed 7 redundant places. [2022-11-18 20:20:03,592 INFO L231 Difference]: Finished difference. Result has 337 places, 297 transitions, 1962 flow [2022-11-18 20:20:03,593 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=1962, PETRI_PLACES=337, PETRI_TRANSITIONS=297} [2022-11-18 20:20:03,594 INFO L288 CegarLoopForPetriNet]: 160 programPoint places, 177 predicate places. [2022-11-18 20:20:03,594 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 297 transitions, 1962 flow [2022-11-18 20:20:03,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 79.07894736842105) internal successors, (3005), 38 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:03,596 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:03,596 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:03,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:03,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 20:20:03,802 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:20:03,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:03,802 INFO L85 PathProgramCache]: Analyzing trace with hash 913735639, now seen corresponding path program 1 times [2022-11-18 20:20:03,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:03,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542586008] [2022-11-18 20:20:03,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:03,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:04,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:04,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542586008] [2022-11-18 20:20:04,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542586008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:04,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000907334] [2022-11-18 20:20:04,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:04,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:04,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:04,456 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:04,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:20:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:04,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 20:20:04,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:04,976 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 15 treesize of output 7 [2022-11-18 20:20:05,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:05,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:05,093 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-18 20:20:05,094 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 19 treesize of output 11 [2022-11-18 20:20:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:20:05,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000907334] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:05,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:20:05,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 16 [2022-11-18 20:20:05,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643995220] [2022-11-18 20:20:05,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:20:05,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:20:05,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:05,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:20:05,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:20:05,223 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2022-11-18 20:20:05,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 297 transitions, 1962 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:05,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:05,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2022-11-18 20:20:05,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:07,252 INFO L130 PetriNetUnfolder]: 1883/6022 cut-off events. [2022-11-18 20:20:07,252 INFO L131 PetriNetUnfolder]: For 17090/17333 co-relation queries the response was YES. [2022-11-18 20:20:07,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17062 conditions, 6022 events. 1883/6022 cut-off events. For 17090/17333 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 55971 event pairs, 353 based on Foata normal form. 42/5841 useless extension candidates. Maximal degree in co-relation 16982. Up to 1116 conditions per place. [2022-11-18 20:20:07,311 INFO L137 encePairwiseOnDemand]: 166/179 looper letters, 123 selfloop transitions, 92 changer transitions 4/424 dead transitions. [2022-11-18 20:20:07,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 424 transitions, 2885 flow [2022-11-18 20:20:07,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:20:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-18 20:20:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2514 transitions. [2022-11-18 20:20:07,316 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7022346368715083 [2022-11-18 20:20:07,316 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2514 transitions. [2022-11-18 20:20:07,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2514 transitions. [2022-11-18 20:20:07,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:07,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2514 transitions. [2022-11-18 20:20:07,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 125.7) internal successors, (2514), 20 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:07,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 179.0) internal successors, (3759), 21 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:07,329 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 179.0) internal successors, (3759), 21 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:07,329 INFO L175 Difference]: Start difference. First operand has 337 places, 297 transitions, 1962 flow. Second operand 20 states and 2514 transitions. [2022-11-18 20:20:07,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 424 transitions, 2885 flow [2022-11-18 20:20:07,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 424 transitions, 2731 flow, removed 70 selfloop flow, removed 26 redundant places. [2022-11-18 20:20:07,450 INFO L231 Difference]: Finished difference. Result has 301 places, 358 transitions, 2371 flow [2022-11-18 20:20:07,451 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=1838, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2371, PETRI_PLACES=301, PETRI_TRANSITIONS=358} [2022-11-18 20:20:07,451 INFO L288 CegarLoopForPetriNet]: 160 programPoint places, 141 predicate places. [2022-11-18 20:20:07,452 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 358 transitions, 2371 flow [2022-11-18 20:20:07,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:07,452 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:07,452 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:07,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:07,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:07,658 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:20:07,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:07,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1389108957, now seen corresponding path program 2 times [2022-11-18 20:20:07,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:07,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409044571] [2022-11-18 20:20:07,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:07,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:08,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:08,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409044571] [2022-11-18 20:20:08,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409044571] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:08,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966007751] [2022-11-18 20:20:08,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:20:08,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:08,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:08,280 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:08,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:20:08,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:20:08,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:20:08,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 20:20:08,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:08,810 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 15 treesize of output 7 [2022-11-18 20:20:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:08,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:08,924 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-18 20:20:08,924 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 19 treesize of output 11 [2022-11-18 20:20:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:20:09,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966007751] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:09,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:20:09,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 16 [2022-11-18 20:20:09,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214573534] [2022-11-18 20:20:09,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:20:09,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:20:09,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:09,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:20:09,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:20:09,047 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2022-11-18 20:20:09,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 358 transitions, 2371 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:09,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:09,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2022-11-18 20:20:09,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:10,690 INFO L130 PetriNetUnfolder]: 1989/6383 cut-off events. [2022-11-18 20:20:10,690 INFO L131 PetriNetUnfolder]: For 15260/15494 co-relation queries the response was YES. [2022-11-18 20:20:10,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18947 conditions, 6383 events. 1989/6383 cut-off events. For 15260/15494 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 60449 event pairs, 413 based on Foata normal form. 65/6214 useless extension candidates. Maximal degree in co-relation 18877. Up to 1427 conditions per place. [2022-11-18 20:20:10,757 INFO L137 encePairwiseOnDemand]: 167/179 looper letters, 140 selfloop transitions, 88 changer transitions 7/440 dead transitions. [2022-11-18 20:20:10,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 440 transitions, 3216 flow [2022-11-18 20:20:10,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:20:10,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-18 20:20:10,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1899 transitions. [2022-11-18 20:20:10,762 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7072625698324022 [2022-11-18 20:20:10,763 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1899 transitions. [2022-11-18 20:20:10,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1899 transitions. [2022-11-18 20:20:10,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:10,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1899 transitions. [2022-11-18 20:20:10,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 126.6) internal successors, (1899), 15 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:10,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:10,774 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:10,774 INFO L175 Difference]: Start difference. First operand has 301 places, 358 transitions, 2371 flow. Second operand 15 states and 1899 transitions. [2022-11-18 20:20:10,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 440 transitions, 3216 flow [2022-11-18 20:20:10,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 440 transitions, 3188 flow, removed 14 selfloop flow, removed 2 redundant places. [2022-11-18 20:20:10,918 INFO L231 Difference]: Finished difference. Result has 320 places, 385 transitions, 2805 flow [2022-11-18 20:20:10,918 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2349, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2805, PETRI_PLACES=320, PETRI_TRANSITIONS=385} [2022-11-18 20:20:10,919 INFO L288 CegarLoopForPetriNet]: 160 programPoint places, 160 predicate places. [2022-11-18 20:20:10,919 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 385 transitions, 2805 flow [2022-11-18 20:20:10,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:10,920 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:10,920 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:10,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:11,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:11,126 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:20:11,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:11,127 INFO L85 PathProgramCache]: Analyzing trace with hash 147677073, now seen corresponding path program 3 times [2022-11-18 20:20:11,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:11,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184868601] [2022-11-18 20:20:11,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:11,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:11,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:11,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:11,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184868601] [2022-11-18 20:20:11,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184868601] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:11,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167214959] [2022-11-18 20:20:11,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:20:11,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:11,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:11,790 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:11,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:20:11,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 20:20:11,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:20:11,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 20:20:11,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:12,289 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 15 treesize of output 7 [2022-11-18 20:20:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:12,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:12,420 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-18 20:20:12,421 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 19 treesize of output 11 [2022-11-18 20:20:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:20:12,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167214959] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:12,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:20:12,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 17 [2022-11-18 20:20:12,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573292753] [2022-11-18 20:20:12,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:20:12,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:20:12,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:12,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:20:12,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:20:12,537 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2022-11-18 20:20:12,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 385 transitions, 2805 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:12,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:12,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2022-11-18 20:20:12,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:14,724 INFO L130 PetriNetUnfolder]: 2136/7065 cut-off events. [2022-11-18 20:20:14,724 INFO L131 PetriNetUnfolder]: For 19512/19783 co-relation queries the response was YES. [2022-11-18 20:20:14,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22343 conditions, 7065 events. 2136/7065 cut-off events. For 19512/19783 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 69718 event pairs, 341 based on Foata normal form. 59/6878 useless extension candidates. Maximal degree in co-relation 22265. Up to 1317 conditions per place. [2022-11-18 20:20:14,789 INFO L137 encePairwiseOnDemand]: 166/179 looper letters, 159 selfloop transitions, 108 changer transitions 9/481 dead transitions. [2022-11-18 20:20:14,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 481 transitions, 3847 flow [2022-11-18 20:20:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:20:14,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-18 20:20:14,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1926 transitions. [2022-11-18 20:20:14,793 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.71731843575419 [2022-11-18 20:20:14,793 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1926 transitions. [2022-11-18 20:20:14,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1926 transitions. [2022-11-18 20:20:14,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:14,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1926 transitions. [2022-11-18 20:20:14,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 128.4) internal successors, (1926), 15 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:14,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:14,803 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:14,803 INFO L175 Difference]: Start difference. First operand has 320 places, 385 transitions, 2805 flow. Second operand 15 states and 1926 transitions. [2022-11-18 20:20:14,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 481 transitions, 3847 flow [2022-11-18 20:20:14,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 481 transitions, 3803 flow, removed 22 selfloop flow, removed 2 redundant places. [2022-11-18 20:20:14,970 INFO L231 Difference]: Finished difference. Result has 338 places, 405 transitions, 3255 flow [2022-11-18 20:20:14,971 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2773, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3255, PETRI_PLACES=338, PETRI_TRANSITIONS=405} [2022-11-18 20:20:14,971 INFO L288 CegarLoopForPetriNet]: 160 programPoint places, 178 predicate places. [2022-11-18 20:20:14,972 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 405 transitions, 3255 flow [2022-11-18 20:20:14,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:14,974 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:14,974 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:14,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:15,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:20:15,182 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:20:15,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:15,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1207030193, now seen corresponding path program 4 times [2022-11-18 20:20:15,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:15,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057554969] [2022-11-18 20:20:15,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:15,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:15,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:15,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057554969] [2022-11-18 20:20:15,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057554969] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:15,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311721773] [2022-11-18 20:20:15,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:20:15,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:15,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:15,728 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:15,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:20:15,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:20:15,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:20:15,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:20:15,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:16,157 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 15 treesize of output 7 [2022-11-18 20:20:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:16,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:16,244 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-18 20:20:16,245 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 19 treesize of output 11 [2022-11-18 20:20:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:20:16,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311721773] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:16,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:20:16,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 10] total 17 [2022-11-18 20:20:16,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164042652] [2022-11-18 20:20:16,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:20:16,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:20:16,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:16,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:20:16,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:20:16,363 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2022-11-18 20:20:16,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 405 transitions, 3255 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:16,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:16,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2022-11-18 20:20:16,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:18,447 INFO L130 PetriNetUnfolder]: 2162/7221 cut-off events. [2022-11-18 20:20:18,447 INFO L131 PetriNetUnfolder]: For 25402/25661 co-relation queries the response was YES. [2022-11-18 20:20:18,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24387 conditions, 7221 events. 2162/7221 cut-off events. For 25402/25661 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 71909 event pairs, 383 based on Foata normal form. 57/7013 useless extension candidates. Maximal degree in co-relation 24302. Up to 1639 conditions per place. [2022-11-18 20:20:18,631 INFO L137 encePairwiseOnDemand]: 166/179 looper letters, 162 selfloop transitions, 99 changer transitions 4/470 dead transitions. [2022-11-18 20:20:18,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 470 transitions, 4117 flow [2022-11-18 20:20:18,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:20:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 20:20:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2260 transitions. [2022-11-18 20:20:18,636 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7014276846679082 [2022-11-18 20:20:18,636 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2260 transitions. [2022-11-18 20:20:18,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2260 transitions. [2022-11-18 20:20:18,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:18,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2260 transitions. [2022-11-18 20:20:18,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 125.55555555555556) internal successors, (2260), 18 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:18,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 179.0) internal successors, (3401), 19 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:18,648 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 179.0) internal successors, (3401), 19 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:18,648 INFO L175 Difference]: Start difference. First operand has 338 places, 405 transitions, 3255 flow. Second operand 18 states and 2260 transitions. [2022-11-18 20:20:18,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 470 transitions, 4117 flow [2022-11-18 20:20:18,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 470 transitions, 3921 flow, removed 46 selfloop flow, removed 6 redundant places. [2022-11-18 20:20:18,864 INFO L231 Difference]: Finished difference. Result has 351 places, 412 transitions, 3356 flow [2022-11-18 20:20:18,865 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=3067, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3356, PETRI_PLACES=351, PETRI_TRANSITIONS=412} [2022-11-18 20:20:18,866 INFO L288 CegarLoopForPetriNet]: 160 programPoint places, 191 predicate places. [2022-11-18 20:20:18,866 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 412 transitions, 3356 flow [2022-11-18 20:20:18,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:18,867 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:18,867 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:18,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:19,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:20:19,072 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:20:19,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:19,073 INFO L85 PathProgramCache]: Analyzing trace with hash -177506477, now seen corresponding path program 5 times [2022-11-18 20:20:19,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:19,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030280887] [2022-11-18 20:20:19,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:19,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:19,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:19,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:19,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030280887] [2022-11-18 20:20:19,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030280887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:19,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208654192] [2022-11-18 20:20:19,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:20:19,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:19,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:19,563 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:19,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:20:19,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:20:19,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:20:19,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 20:20:19,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:20,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:20:20,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:20:20,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:20:20,694 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 15 treesize of output 7 [2022-11-18 20:20:20,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:20,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:25,289 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:20:25,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2022-11-18 20:20:25,303 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-18 20:20:25,304 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 94 treesize of output 85 [2022-11-18 20:20:25,315 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-18 20:20:25,315 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 78 treesize of output 54 [2022-11-18 20:20:25,325 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-18 20:20:25,326 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 32 treesize of output 20 [2022-11-18 20:20:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:25,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208654192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:20:25,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:20:25,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 15] total 32 [2022-11-18 20:20:25,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213233600] [2022-11-18 20:20:25,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:20:25,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-18 20:20:25,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:25,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-18 20:20:25,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=760, Unknown=16, NotChecked=0, Total=992 [2022-11-18 20:20:25,449 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 179 [2022-11-18 20:20:25,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 412 transitions, 3356 flow. Second operand has 32 states, 32 states have (on average 101.0625) internal successors, (3234), 32 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) [2022-11-18 20:20:25,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:25,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 179 [2022-11-18 20:20:25,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:28,379 INFO L130 PetriNetUnfolder]: 2231/7558 cut-off events. [2022-11-18 20:20:28,380 INFO L131 PetriNetUnfolder]: For 27592/27928 co-relation queries the response was YES. [2022-11-18 20:20:28,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25938 conditions, 7558 events. 2231/7558 cut-off events. For 27592/27928 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 76377 event pairs, 423 based on Foata normal form. 95/7364 useless extension candidates. Maximal degree in co-relation 25850. Up to 1931 conditions per place. [2022-11-18 20:20:28,498 INFO L137 encePairwiseOnDemand]: 156/179 looper letters, 189 selfloop transitions, 97 changer transitions 4/473 dead transitions. [2022-11-18 20:20:28,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 473 transitions, 4296 flow [2022-11-18 20:20:28,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:20:28,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-18 20:20:28,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2365 transitions. [2022-11-18 20:20:28,504 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5744474131649259 [2022-11-18 20:20:28,504 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2365 transitions. [2022-11-18 20:20:28,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2365 transitions. [2022-11-18 20:20:28,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:28,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2365 transitions. [2022-11-18 20:20:28,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 102.82608695652173) internal successors, (2365), 23 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:28,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:28,521 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:28,521 INFO L175 Difference]: Start difference. First operand has 351 places, 412 transitions, 3356 flow. Second operand 23 states and 2365 transitions. [2022-11-18 20:20:28,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 473 transitions, 4296 flow [2022-11-18 20:20:28,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 473 transitions, 4163 flow, removed 24 selfloop flow, removed 9 redundant places. [2022-11-18 20:20:28,751 INFO L231 Difference]: Finished difference. Result has 367 places, 424 transitions, 3589 flow [2022-11-18 20:20:28,752 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=3229, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3589, PETRI_PLACES=367, PETRI_TRANSITIONS=424} [2022-11-18 20:20:28,752 INFO L288 CegarLoopForPetriNet]: 160 programPoint places, 207 predicate places. [2022-11-18 20:20:28,752 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 424 transitions, 3589 flow [2022-11-18 20:20:28,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 101.0625) internal successors, (3234), 32 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) [2022-11-18 20:20:28,753 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:28,753 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:28,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:28,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:20:28,954 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:20:28,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:28,955 INFO L85 PathProgramCache]: Analyzing trace with hash 563190419, now seen corresponding path program 6 times [2022-11-18 20:20:28,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:28,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375260952] [2022-11-18 20:20:28,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:28,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:29,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:29,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375260952] [2022-11-18 20:20:29,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375260952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:29,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016779310] [2022-11-18 20:20:29,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:20:29,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:29,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:29,525 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:29,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:20:29,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 20:20:29,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:20:29,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 20:20:29,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:30,102 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 15 treesize of output 7 [2022-11-18 20:20:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:30,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:30,228 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-18 20:20:30,228 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 19 treesize of output 11 [2022-11-18 20:20:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:20:30,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016779310] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:30,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:20:30,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 16 [2022-11-18 20:20:30,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795366098] [2022-11-18 20:20:30,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:20:30,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:20:30,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:30,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:20:30,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:20:30,371 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2022-11-18 20:20:30,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 424 transitions, 3589 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:30,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:30,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2022-11-18 20:20:30,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:32,396 INFO L130 PetriNetUnfolder]: 2255/7692 cut-off events. [2022-11-18 20:20:32,396 INFO L131 PetriNetUnfolder]: For 30467/30795 co-relation queries the response was YES. [2022-11-18 20:20:32,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27026 conditions, 7692 events. 2255/7692 cut-off events. For 30467/30795 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 78373 event pairs, 431 based on Foata normal form. 93/7487 useless extension candidates. Maximal degree in co-relation 26934. Up to 1930 conditions per place. [2022-11-18 20:20:32,505 INFO L137 encePairwiseOnDemand]: 167/179 looper letters, 174 selfloop transitions, 97 changer transitions 4/480 dead transitions. [2022-11-18 20:20:32,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 480 transitions, 4448 flow [2022-11-18 20:20:32,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:20:32,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 20:20:32,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2250 transitions. [2022-11-18 20:20:32,510 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6983240223463687 [2022-11-18 20:20:32,511 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2250 transitions. [2022-11-18 20:20:32,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2250 transitions. [2022-11-18 20:20:32,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:32,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2250 transitions. [2022-11-18 20:20:32,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 125.0) internal successors, (2250), 18 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:32,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 179.0) internal successors, (3401), 19 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:32,524 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 179.0) internal successors, (3401), 19 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:32,524 INFO L175 Difference]: Start difference. First operand has 367 places, 424 transitions, 3589 flow. Second operand 18 states and 2250 transitions. [2022-11-18 20:20:32,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 480 transitions, 4448 flow [2022-11-18 20:20:32,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 480 transitions, 4289 flow, removed 19 selfloop flow, removed 15 redundant places. [2022-11-18 20:20:32,751 INFO L231 Difference]: Finished difference. Result has 370 places, 430 transitions, 3722 flow [2022-11-18 20:20:32,751 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=3438, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3722, PETRI_PLACES=370, PETRI_TRANSITIONS=430} [2022-11-18 20:20:32,752 INFO L288 CegarLoopForPetriNet]: 160 programPoint places, 210 predicate places. [2022-11-18 20:20:32,752 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 430 transitions, 3722 flow [2022-11-18 20:20:32,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:32,752 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:32,753 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:32,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:32,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:32,956 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:20:32,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:32,956 INFO L85 PathProgramCache]: Analyzing trace with hash 2143283801, now seen corresponding path program 7 times [2022-11-18 20:20:32,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:32,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925178104] [2022-11-18 20:20:32,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:32,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:33,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:33,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925178104] [2022-11-18 20:20:33,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925178104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:33,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455855153] [2022-11-18 20:20:33,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:20:33,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:33,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:33,888 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:33,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:20:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:34,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-18 20:20:34,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:34,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:20:34,260 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:20:34,260 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 11 treesize of output 11 [2022-11-18 20:20:34,622 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 [2022-11-18 20:20:34,741 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 15 treesize of output 7 [2022-11-18 20:20:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:34,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:34,905 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_288 (Array Int Int))) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_288) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)))) is different from false [2022-11-18 20:20:34,935 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:20:34,937 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 34 [2022-11-18 20:20:34,943 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 13 treesize of output 7 [2022-11-18 20:20:35,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:35,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455855153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:20:35,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:20:35,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 25 [2022-11-18 20:20:35,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11236397] [2022-11-18 20:20:35,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:20:35,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 20:20:35,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:35,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 20:20:35,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=474, Unknown=1, NotChecked=44, Total=600 [2022-11-18 20:20:35,689 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 179 [2022-11-18 20:20:35,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 430 transitions, 3722 flow. Second operand has 25 states, 25 states have (on average 104.52) internal successors, (2613), 25 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:35,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:35,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 179 [2022-11-18 20:20:35,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:42,622 INFO L130 PetriNetUnfolder]: 2356/7966 cut-off events. [2022-11-18 20:20:42,623 INFO L131 PetriNetUnfolder]: For 34283/34562 co-relation queries the response was YES. [2022-11-18 20:20:42,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28947 conditions, 7966 events. 2356/7966 cut-off events. For 34283/34562 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 81704 event pairs, 482 based on Foata normal form. 67/7732 useless extension candidates. Maximal degree in co-relation 28854. Up to 2035 conditions per place. [2022-11-18 20:20:42,791 INFO L137 encePairwiseOnDemand]: 154/179 looper letters, 189 selfloop transitions, 140 changer transitions 4/524 dead transitions. [2022-11-18 20:20:42,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 524 transitions, 5278 flow [2022-11-18 20:20:42,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:20:42,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 20:20:42,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2257 transitions. [2022-11-18 20:20:42,794 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6004256451183826 [2022-11-18 20:20:42,795 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2257 transitions. [2022-11-18 20:20:42,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2257 transitions. [2022-11-18 20:20:42,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:42,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2257 transitions. [2022-11-18 20:20:42,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 107.47619047619048) internal successors, (2257), 21 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:42,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 179.0) internal successors, (3938), 22 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:42,806 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 179.0) internal successors, (3938), 22 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:42,806 INFO L175 Difference]: Start difference. First operand has 370 places, 430 transitions, 3722 flow. Second operand 21 states and 2257 transitions. [2022-11-18 20:20:42,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 524 transitions, 5278 flow [2022-11-18 20:20:43,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 524 transitions, 5038 flow, removed 28 selfloop flow, removed 12 redundant places. [2022-11-18 20:20:43,112 INFO L231 Difference]: Finished difference. Result has 383 places, 478 transitions, 4536 flow [2022-11-18 20:20:43,112 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=3544, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4536, PETRI_PLACES=383, PETRI_TRANSITIONS=478} [2022-11-18 20:20:43,113 INFO L288 CegarLoopForPetriNet]: 160 programPoint places, 223 predicate places. [2022-11-18 20:20:43,113 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 478 transitions, 4536 flow [2022-11-18 20:20:43,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 104.52) internal successors, (2613), 25 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:43,114 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:43,114 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:43,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:43,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:20:43,319 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:20:43,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:43,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1556091411, now seen corresponding path program 8 times [2022-11-18 20:20:43,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:43,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238564736] [2022-11-18 20:20:43,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:43,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:44,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:44,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:44,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238564736] [2022-11-18 20:20:44,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238564736] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:44,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975166513] [2022-11-18 20:20:44,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:20:44,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:44,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:44,165 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:44,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:20:44,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:20:44,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:20:44,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 20:20:44,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:45,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:45,244 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 14 treesize of output 16 [2022-11-18 20:20:45,367 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 15 treesize of output 7 [2022-11-18 20:20:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:45,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:45,611 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_313 (Array Int Int))) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_313) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)))) is different from false [2022-11-18 20:20:45,624 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:20:45,625 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 34 [2022-11-18 20:20:45,630 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 13 treesize of output 7 [2022-11-18 20:20:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:46,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975166513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:20:46,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:20:46,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 33 [2022-11-18 20:20:46,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128930550] [2022-11-18 20:20:46,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:20:46,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 20:20:46,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:46,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 20:20:46,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=869, Unknown=1, NotChecked=60, Total=1056 [2022-11-18 20:20:46,322 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 179 [2022-11-18 20:20:46,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 478 transitions, 4536 flow. Second operand has 33 states, 33 states have (on average 103.54545454545455) internal successors, (3417), 33 states have internal predecessors, (3417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:46,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:46,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 179 [2022-11-18 20:20:46,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:50,419 INFO L130 PetriNetUnfolder]: 2785/9507 cut-off events. [2022-11-18 20:20:50,419 INFO L131 PetriNetUnfolder]: For 47037/47751 co-relation queries the response was YES. [2022-11-18 20:20:50,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36644 conditions, 9507 events. 2785/9507 cut-off events. For 47037/47751 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 102092 event pairs, 482 based on Foata normal form. 107/9249 useless extension candidates. Maximal degree in co-relation 36546. Up to 2087 conditions per place. [2022-11-18 20:20:50,640 INFO L137 encePairwiseOnDemand]: 153/179 looper letters, 229 selfloop transitions, 186 changer transitions 9/614 dead transitions. [2022-11-18 20:20:50,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 614 transitions, 6586 flow [2022-11-18 20:20:50,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:20:50,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-18 20:20:50,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2574 transitions. [2022-11-18 20:20:50,645 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5991620111731844 [2022-11-18 20:20:50,645 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2574 transitions. [2022-11-18 20:20:50,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2574 transitions. [2022-11-18 20:20:50,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:50,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2574 transitions. [2022-11-18 20:20:50,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 107.25) internal successors, (2574), 24 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:50,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 179.0) internal successors, (4475), 25 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:50,660 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 179.0) internal successors, (4475), 25 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:50,660 INFO L175 Difference]: Start difference. First operand has 383 places, 478 transitions, 4536 flow. Second operand 24 states and 2574 transitions. [2022-11-18 20:20:50,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 614 transitions, 6586 flow [2022-11-18 20:20:51,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 614 transitions, 6318 flow, removed 40 selfloop flow, removed 13 redundant places. [2022-11-18 20:20:51,132 INFO L231 Difference]: Finished difference. Result has 401 places, 535 transitions, 5507 flow [2022-11-18 20:20:51,133 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=4318, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5507, PETRI_PLACES=401, PETRI_TRANSITIONS=535} [2022-11-18 20:20:51,133 INFO L288 CegarLoopForPetriNet]: 160 programPoint places, 241 predicate places. [2022-11-18 20:20:51,133 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 535 transitions, 5507 flow [2022-11-18 20:20:51,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 103.54545454545455) internal successors, (3417), 33 states have internal predecessors, (3417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:51,134 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:51,135 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:51,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:51,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:20:51,340 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:20:51,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:51,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1956589765, now seen corresponding path program 9 times [2022-11-18 20:20:51,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:51,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138158951] [2022-11-18 20:20:51,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:51,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:52,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:52,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138158951] [2022-11-18 20:20:52,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138158951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:52,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94022013] [2022-11-18 20:20:52,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:20:52,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:52,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:52,275 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:52,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:20:52,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 20:20:52,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:20:52,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 20:20:52,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:53,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:53,387 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 14 treesize of output 16 [2022-11-18 20:20:53,548 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 15 treesize of output 7 [2022-11-18 20:20:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:53,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:53,753 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_338 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_338) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)) is different from false [2022-11-18 20:20:53,784 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:20:53,784 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 34 [2022-11-18 20:20:53,797 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 13 treesize of output 7 [2022-11-18 20:20:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:54,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94022013] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:20:54,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:20:54,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 33 [2022-11-18 20:20:54,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554682379] [2022-11-18 20:20:54,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:20:54,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 20:20:54,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:54,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 20:20:54,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=869, Unknown=1, NotChecked=60, Total=1056 [2022-11-18 20:20:54,423 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 179 [2022-11-18 20:20:54,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 535 transitions, 5507 flow. Second operand has 33 states, 33 states have (on average 103.57575757575758) internal successors, (3418), 33 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:54,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:54,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 179 [2022-11-18 20:20:54,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:59,057 INFO L130 PetriNetUnfolder]: 3085/10808 cut-off events. [2022-11-18 20:20:59,057 INFO L131 PetriNetUnfolder]: For 64597/65316 co-relation queries the response was YES. [2022-11-18 20:20:59,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44320 conditions, 10808 events. 3085/10808 cut-off events. For 64597/65316 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 120691 event pairs, 434 based on Foata normal form. 201/10612 useless extension candidates. Maximal degree in co-relation 44214. Up to 1689 conditions per place. [2022-11-18 20:20:59,311 INFO L137 encePairwiseOnDemand]: 158/179 looper letters, 220 selfloop transitions, 266 changer transitions 13/689 dead transitions. [2022-11-18 20:20:59,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 689 transitions, 8056 flow [2022-11-18 20:20:59,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-18 20:20:59,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-18 20:20:59,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3299 transitions. [2022-11-18 20:20:59,316 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5945215354117859 [2022-11-18 20:20:59,316 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3299 transitions. [2022-11-18 20:20:59,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3299 transitions. [2022-11-18 20:20:59,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:59,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3299 transitions. [2022-11-18 20:20:59,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 106.41935483870968) internal successors, (3299), 31 states have internal predecessors, (3299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:59,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 179.0) internal successors, (5728), 32 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:59,330 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 179.0) internal successors, (5728), 32 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:59,331 INFO L175 Difference]: Start difference. First operand has 401 places, 535 transitions, 5507 flow. Second operand 31 states and 3299 transitions. [2022-11-18 20:20:59,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 689 transitions, 8056 flow [2022-11-18 20:20:59,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 689 transitions, 7690 flow, removed 125 selfloop flow, removed 12 redundant places. [2022-11-18 20:20:59,872 INFO L231 Difference]: Finished difference. Result has 429 places, 594 transitions, 6808 flow [2022-11-18 20:20:59,873 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=5255, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=6808, PETRI_PLACES=429, PETRI_TRANSITIONS=594} [2022-11-18 20:20:59,873 INFO L288 CegarLoopForPetriNet]: 160 programPoint places, 269 predicate places. [2022-11-18 20:20:59,873 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 594 transitions, 6808 flow [2022-11-18 20:20:59,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 103.57575757575758) internal successors, (3418), 33 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:59,874 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:59,874 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:59,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:21:00,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:21:00,080 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:21:00,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:21:00,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1346902037, now seen corresponding path program 10 times [2022-11-18 20:21:00,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:21:00,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450346198] [2022-11-18 20:21:00,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:00,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:21:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:21:00,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:21:00,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450346198] [2022-11-18 20:21:00,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450346198] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:21:00,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59520520] [2022-11-18 20:21:00,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:21:00,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:00,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:21:00,800 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:21:00,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:21:00,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:21:00,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:21:00,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-18 20:21:00,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:21:01,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:21:01,674 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 6 treesize of output 5 [2022-11-18 20:21:01,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:01,835 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 14 treesize of output 16 [2022-11-18 20:21:01,907 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 15 treesize of output 7 [2022-11-18 20:21:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:21:01,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:21:02,048 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_366 (Array Int Int))) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_366) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)))) is different from false [2022-11-18 20:21:02,240 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_366 (Array Int Int)) (v_ArrVal_365 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_365))) (= (select (select .cse0 |c_ULTIMATE.start_main_#t~ret11#1.base|) (+ (* c_~x1~0 4) |c_ULTIMATE.start_main_#t~ret11#1.offset|)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_366) |c_ULTIMATE.start_main_#t~ret11#1.base|) (+ (* c_~x2~0 4) |c_ULTIMATE.start_main_#t~ret11#1.offset|))))) is different from false [2022-11-18 20:21:04,368 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_366 (Array Int Int)) (v_ArrVal_365 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_365))) (= (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~x1~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_366) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~x2~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) is different from false [2022-11-18 20:21:04,401 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:21:04,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 41 [2022-11-18 20:21:04,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:21:04,414 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 414 treesize of output 330 [2022-11-18 20:21:04,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:21:04,429 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 318 treesize of output 258 [2022-11-18 20:21:04,437 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 246 treesize of output 198 [2022-11-18 20:21:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-18 20:21:04,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59520520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:21:04,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:21:04,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 18] total 38 [2022-11-18 20:21:04,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26094752] [2022-11-18 20:21:04,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:21:04,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 20:21:04,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:21:04,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 20:21:04,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1027, Unknown=27, NotChecked=204, Total=1406 [2022-11-18 20:21:04,885 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 179 [2022-11-18 20:21:04,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 594 transitions, 6808 flow. Second operand has 38 states, 38 states have (on average 97.55263157894737) internal successors, (3707), 38 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:04,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:21:04,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 179 [2022-11-18 20:21:04,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:21:10,037 INFO L130 PetriNetUnfolder]: 3202/11216 cut-off events. [2022-11-18 20:21:10,037 INFO L131 PetriNetUnfolder]: For 90629/91653 co-relation queries the response was YES. [2022-11-18 20:21:10,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49245 conditions, 11216 events. 3202/11216 cut-off events. For 90629/91653 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 126264 event pairs, 641 based on Foata normal form. 235/10993 useless extension candidates. Maximal degree in co-relation 49128. Up to 3367 conditions per place. [2022-11-18 20:21:10,292 INFO L137 encePairwiseOnDemand]: 151/179 looper letters, 326 selfloop transitions, 200 changer transitions 7/713 dead transitions. [2022-11-18 20:21:10,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 713 transitions, 9275 flow [2022-11-18 20:21:10,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 20:21:10,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-18 20:21:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2510 transitions. [2022-11-18 20:21:10,296 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5608938547486033 [2022-11-18 20:21:10,296 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2510 transitions. [2022-11-18 20:21:10,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2510 transitions. [2022-11-18 20:21:10,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:21:10,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2510 transitions. [2022-11-18 20:21:10,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 100.4) internal successors, (2510), 25 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:10,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 179.0) internal successors, (4654), 26 states have internal predecessors, (4654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:10,303 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 179.0) internal successors, (4654), 26 states have internal predecessors, (4654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:10,303 INFO L175 Difference]: Start difference. First operand has 429 places, 594 transitions, 6808 flow. Second operand 25 states and 2510 transitions. [2022-11-18 20:21:10,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 713 transitions, 9275 flow [2022-11-18 20:21:11,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 713 transitions, 8733 flow, removed 223 selfloop flow, removed 13 redundant places. [2022-11-18 20:21:11,040 INFO L231 Difference]: Finished difference. Result has 445 places, 652 transitions, 7730 flow [2022-11-18 20:21:11,041 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=6339, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=7730, PETRI_PLACES=445, PETRI_TRANSITIONS=652} [2022-11-18 20:21:11,042 INFO L288 CegarLoopForPetriNet]: 160 programPoint places, 285 predicate places. [2022-11-18 20:21:11,042 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 652 transitions, 7730 flow [2022-11-18 20:21:11,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 97.55263157894737) internal successors, (3707), 38 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:11,043 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:21:11,043 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:21:11,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:21:11,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:11,250 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:21:11,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:21:11,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1555137115, now seen corresponding path program 11 times [2022-11-18 20:21:11,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:21:11,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122640741] [2022-11-18 20:21:11,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:11,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:21:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:21:11,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:21:11,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122640741] [2022-11-18 20:21:11,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122640741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:21:11,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131150752] [2022-11-18 20:21:11,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:21:11,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:11,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:21:11,948 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:21:11,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:21:12,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:21:12,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:21:12,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-18 20:21:12,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:21:12,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:21:12,326 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:21:12,326 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 11 treesize of output 11 [2022-11-18 20:21:12,669 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 14 treesize of output 16 [2022-11-18 20:21:12,752 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 15 treesize of output 7 [2022-11-18 20:21:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:21:12,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:21:12,942 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:21:12,943 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 34 [2022-11-18 20:21:12,948 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 13 treesize of output 7 [2022-11-18 20:21:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:21:13,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131150752] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:21:13,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:21:13,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 31 [2022-11-18 20:21:13,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417978465] [2022-11-18 20:21:13,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:21:13,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-18 20:21:13,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:21:13,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-18 20:21:13,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=803, Unknown=5, NotChecked=0, Total=930 [2022-11-18 20:21:13,543 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 179 [2022-11-18 20:21:13,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 652 transitions, 7730 flow. Second operand has 31 states, 31 states have (on average 104.35483870967742) internal successors, (3235), 31 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:13,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:21:13,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 179 [2022-11-18 20:21:13,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:21:22,589 INFO L130 PetriNetUnfolder]: 3261/11788 cut-off events. [2022-11-18 20:21:22,589 INFO L131 PetriNetUnfolder]: For 100008/100915 co-relation queries the response was YES. [2022-11-18 20:21:22,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52203 conditions, 11788 events. 3261/11788 cut-off events. For 100008/100915 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 135434 event pairs, 513 based on Foata normal form. 310/11645 useless extension candidates. Maximal degree in co-relation 52080. Up to 2950 conditions per place. [2022-11-18 20:21:22,735 INFO L137 encePairwiseOnDemand]: 159/179 looper letters, 298 selfloop transitions, 289 changer transitions 8/786 dead transitions. [2022-11-18 20:21:22,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 786 transitions, 10430 flow [2022-11-18 20:21:22,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-18 20:21:22,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-18 20:21:22,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3829 transitions. [2022-11-18 20:21:22,740 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5941961514587213 [2022-11-18 20:21:22,740 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3829 transitions. [2022-11-18 20:21:22,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3829 transitions. [2022-11-18 20:21:22,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:21:22,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3829 transitions. [2022-11-18 20:21:22,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 106.36111111111111) internal successors, (3829), 36 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:22,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 179.0) internal successors, (6623), 37 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:22,752 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 179.0) internal successors, (6623), 37 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:22,752 INFO L175 Difference]: Start difference. First operand has 445 places, 652 transitions, 7730 flow. Second operand 36 states and 3829 transitions. [2022-11-18 20:21:22,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 786 transitions, 10430 flow [2022-11-18 20:21:23,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 786 transitions, 10125 flow, removed 127 selfloop flow, removed 13 redundant places. [2022-11-18 20:21:23,441 INFO L231 Difference]: Finished difference. Result has 473 places, 705 transitions, 9024 flow [2022-11-18 20:21:23,442 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=7547, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=9024, PETRI_PLACES=473, PETRI_TRANSITIONS=705} [2022-11-18 20:21:23,442 INFO L288 CegarLoopForPetriNet]: 160 programPoint places, 313 predicate places. [2022-11-18 20:21:23,442 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 705 transitions, 9024 flow [2022-11-18 20:21:23,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 104.35483870967742) internal successors, (3235), 31 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:23,443 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:21:23,443 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:21:23,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:21:23,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:23,644 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:21:23,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:21:23,644 INFO L85 PathProgramCache]: Analyzing trace with hash 402724339, now seen corresponding path program 12 times [2022-11-18 20:21:23,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:21:23,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001725101] [2022-11-18 20:21:23,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:23,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:21:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:21:24,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:21:24,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001725101] [2022-11-18 20:21:24,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001725101] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:21:24,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232280304] [2022-11-18 20:21:24,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:21:24,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:24,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:21:24,490 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:21:24,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:21:24,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 20:21:24,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:21:24,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 20:21:24,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:21:25,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:25,312 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 14 treesize of output 16 [2022-11-18 20:21:25,413 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 15 treesize of output 7 [2022-11-18 20:21:25,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:21:25,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:21:25,685 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:21:25,685 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 34 [2022-11-18 20:21:25,689 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 13 treesize of output 7 [2022-11-18 20:21:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:21:26,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232280304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:21:26,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:21:26,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 34 [2022-11-18 20:21:26,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611545608] [2022-11-18 20:21:26,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:21:26,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 20:21:26,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:21:26,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 20:21:26,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=972, Unknown=17, NotChecked=0, Total=1122 [2022-11-18 20:21:26,148 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 179 [2022-11-18 20:21:26,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 705 transitions, 9024 flow. Second operand has 34 states, 34 states have (on average 103.52941176470588) internal successors, (3520), 34 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:26,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:21:26,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 179 [2022-11-18 20:21:26,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:21:35,699 INFO L130 PetriNetUnfolder]: 3646/13131 cut-off events. [2022-11-18 20:21:35,700 INFO L131 PetriNetUnfolder]: For 123755/124828 co-relation queries the response was YES. [2022-11-18 20:21:35,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59361 conditions, 13131 events. 3646/13131 cut-off events. For 123755/124828 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 153562 event pairs, 596 based on Foata normal form. 351/12960 useless extension candidates. Maximal degree in co-relation 59231. Up to 2802 conditions per place. [2022-11-18 20:21:35,971 INFO L137 encePairwiseOnDemand]: 155/179 looper letters, 373 selfloop transitions, 299 changer transitions 6/868 dead transitions. [2022-11-18 20:21:35,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 868 transitions, 12122 flow [2022-11-18 20:21:35,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 20:21:35,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-18 20:21:35,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2685 transitions. [2022-11-18 20:21:35,975 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6 [2022-11-18 20:21:35,975 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2685 transitions. [2022-11-18 20:21:35,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2685 transitions. [2022-11-18 20:21:35,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:21:35,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2685 transitions. [2022-11-18 20:21:35,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 107.4) internal successors, (2685), 25 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:35,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 179.0) internal successors, (4654), 26 states have internal predecessors, (4654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:35,985 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 179.0) internal successors, (4654), 26 states have internal predecessors, (4654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:35,986 INFO L175 Difference]: Start difference. First operand has 473 places, 705 transitions, 9024 flow. Second operand 25 states and 2685 transitions. [2022-11-18 20:21:35,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 868 transitions, 12122 flow [2022-11-18 20:21:37,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 868 transitions, 11213 flow, removed 288 selfloop flow, removed 20 redundant places. [2022-11-18 20:21:37,066 INFO L231 Difference]: Finished difference. Result has 483 places, 770 transitions, 9922 flow [2022-11-18 20:21:37,067 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=8264, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=9922, PETRI_PLACES=483, PETRI_TRANSITIONS=770} [2022-11-18 20:21:37,068 INFO L288 CegarLoopForPetriNet]: 160 programPoint places, 323 predicate places. [2022-11-18 20:21:37,068 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 770 transitions, 9922 flow [2022-11-18 20:21:37,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 103.52941176470588) internal successors, (3520), 34 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:37,068 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:21:37,068 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:21:37,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:21:37,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-18 20:21:37,269 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:21:37,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:21:37,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1445925455, now seen corresponding path program 2 times [2022-11-18 20:21:37,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:21:37,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953263121] [2022-11-18 20:21:37,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:37,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:21:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:21:37,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:21:37,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953263121] [2022-11-18 20:21:37,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953263121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:21:37,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209404166] [2022-11-18 20:21:37,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:21:37,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:37,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:21:37,779 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:21:37,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:21:37,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:21:37,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:21:37,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:21:37,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:21:38,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:21:38,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:21:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:21:38,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209404166] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:21:38,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:21:38,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-11-18 20:21:38,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112871355] [2022-11-18 20:21:38,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:21:38,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 20:21:38,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:21:38,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 20:21:38,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:21:38,693 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2022-11-18 20:21:38,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 770 transitions, 9922 flow. Second operand has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:38,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:21:38,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2022-11-18 20:21:38,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:21:45,358 INFO L130 PetriNetUnfolder]: 3918/16199 cut-off events. [2022-11-18 20:21:45,358 INFO L131 PetriNetUnfolder]: For 107858/108679 co-relation queries the response was YES. [2022-11-18 20:21:45,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67094 conditions, 16199 events. 3918/16199 cut-off events. For 107858/108679 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 201201 event pairs, 1045 based on Foata normal form. 282/15471 useless extension candidates. Maximal degree in co-relation 66959. Up to 1472 conditions per place. [2022-11-18 20:21:45,604 INFO L137 encePairwiseOnDemand]: 164/179 looper letters, 134 selfloop transitions, 120 changer transitions 0/928 dead transitions. [2022-11-18 20:21:45,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 928 transitions, 11637 flow [2022-11-18 20:21:45,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 20:21:45,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-18 20:21:45,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4010 transitions. [2022-11-18 20:21:45,609 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8297123939582041 [2022-11-18 20:21:45,609 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4010 transitions. [2022-11-18 20:21:45,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4010 transitions. [2022-11-18 20:21:45,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:21:45,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4010 transitions. [2022-11-18 20:21:45,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 148.5185185185185) internal successors, (4010), 27 states have internal predecessors, (4010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:45,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 179.0) internal successors, (5012), 28 states have internal predecessors, (5012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:45,621 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 179.0) internal successors, (5012), 28 states have internal predecessors, (5012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:45,621 INFO L175 Difference]: Start difference. First operand has 483 places, 770 transitions, 9922 flow. Second operand 27 states and 4010 transitions. [2022-11-18 20:21:45,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 928 transitions, 11637 flow [2022-11-18 20:21:46,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 928 transitions, 11259 flow, removed 81 selfloop flow, removed 14 redundant places. [2022-11-18 20:21:46,829 INFO L231 Difference]: Finished difference. Result has 510 places, 857 transitions, 10921 flow [2022-11-18 20:21:46,829 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=9544, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=706, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=10921, PETRI_PLACES=510, PETRI_TRANSITIONS=857} [2022-11-18 20:21:46,830 INFO L288 CegarLoopForPetriNet]: 160 programPoint places, 350 predicate places. [2022-11-18 20:21:46,830 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 857 transitions, 10921 flow [2022-11-18 20:21:46,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:46,830 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:21:46,830 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:21:46,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:21:47,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:47,031 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:21:47,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:21:47,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1448804855, now seen corresponding path program 3 times [2022-11-18 20:21:47,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:21:47,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815488409] [2022-11-18 20:21:47,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:47,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:21:47,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:21:47,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:21:47,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815488409] [2022-11-18 20:21:47,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815488409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:21:47,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956303063] [2022-11-18 20:21:47,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:21:47,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:47,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:21:47,576 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:21:47,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89c50e31-e97e-433d-9abf-db116e7e9509/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:21:47,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 20:21:47,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:21:47,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:21:47,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:21:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:21:48,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:21:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:21:48,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956303063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:21:48,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:21:48,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-11-18 20:21:48,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354832208] [2022-11-18 20:21:48,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:21:48,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 20:21:48,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:21:48,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 20:21:48,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:21:48,522 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2022-11-18 20:21:48,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 857 transitions, 10921 flow. Second operand has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:48,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:21:48,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2022-11-18 20:21:48,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand