./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/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_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/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_b47f8b05-9409-47b1-9098-ed287235eebb/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 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f --- 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 18:31:04,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:31:04,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:31:04,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:31:04,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:31:04,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:31:04,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:31:04,156 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:31:04,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:31:04,159 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:31:04,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:31:04,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:31:04,162 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:31:04,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:31:04,164 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:31:04,166 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:31:04,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:31:04,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:31:04,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:31:04,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:31:04,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:31:04,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:31:04,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:31:04,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:31:04,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:31:04,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:31:04,183 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:31:04,184 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:31:04,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:31:04,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:31:04,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:31:04,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:31:04,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:31:04,189 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:31:04,190 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:31:04,191 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:31:04,191 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:31:04,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:31:04,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:31:04,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:31:04,194 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:31:04,195 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:31:04,217 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:31:04,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:31:04,218 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:31:04,218 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:31:04,219 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:31:04,220 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:31:04,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:31:04,221 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:31:04,221 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:31:04,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:31:04,222 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:31:04,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:31:04,222 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:31:04,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:31:04,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:31:04,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:31:04,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:31:04,224 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:31:04,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:31:04,224 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:31:04,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:31:04,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:31:04,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:31:04,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:31:04,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:31:04,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:31:04,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:31:04,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:31:04,227 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:31:04,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:31:04,228 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:31:04,228 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:31:04,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:31:04,229 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_b47f8b05-9409-47b1-9098-ed287235eebb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f [2022-11-18 18:31:04,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:31:04,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:31:04,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:31:04,597 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:31:04,598 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:31:04,600 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2022-11-18 18:31:04,688 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/data/e4d73c41a/d4685f360162415baa39460d09041ab3/FLAGfe11db192 [2022-11-18 18:31:05,383 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:31:05,384 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2022-11-18 18:31:05,404 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/data/e4d73c41a/d4685f360162415baa39460d09041ab3/FLAGfe11db192 [2022-11-18 18:31:05,617 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/data/e4d73c41a/d4685f360162415baa39460d09041ab3 [2022-11-18 18:31:05,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:31:05,623 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:31:05,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:31:05,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:31:05,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:31:05,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:31:05" (1/1) ... [2022-11-18 18:31:05,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60a9b12b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:05, skipping insertion in model container [2022-11-18 18:31:05,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:31:05" (1/1) ... [2022-11-18 18:31:05,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:31:05,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:31:06,062 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_b47f8b05-9409-47b1-9098-ed287235eebb/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2022-11-18 18:31:06,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:31:06,088 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:31:06,150 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_b47f8b05-9409-47b1-9098-ed287235eebb/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2022-11-18 18:31:06,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:31:06,203 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:31:06,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:06 WrapperNode [2022-11-18 18:31:06,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:31:06,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:31:06,205 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:31:06,205 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:31:06,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:06" (1/1) ... [2022-11-18 18:31:06,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:06" (1/1) ... [2022-11-18 18:31:06,251 INFO L138 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 83 [2022-11-18 18:31:06,252 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:31:06,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:31:06,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:31:06,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:31:06,262 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:06" (1/1) ... [2022-11-18 18:31:06,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:06" (1/1) ... [2022-11-18 18:31:06,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:06" (1/1) ... [2022-11-18 18:31:06,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:06" (1/1) ... [2022-11-18 18:31:06,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:06" (1/1) ... [2022-11-18 18:31:06,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:06" (1/1) ... [2022-11-18 18:31:06,278 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:06" (1/1) ... [2022-11-18 18:31:06,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:06" (1/1) ... [2022-11-18 18:31:06,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:31:06,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:31:06,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:31:06,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:31:06,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:06" (1/1) ... [2022-11-18 18:31:06,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:31:06,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:31:06,321 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:31:06,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:31:06,370 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-11-18 18:31:06,371 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-11-18 18:31:06,371 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-18 18:31:06,371 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-18 18:31:06,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:31:06,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:31:06,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:31:06,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:31:06,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:31:06,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:31:06,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:31:06,377 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 18:31:06,538 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:31:06,540 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:31:06,776 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:31:06,858 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:31:06,866 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 18:31:06,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:31:06 BoogieIcfgContainer [2022-11-18 18:31:06,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:31:06,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:31:06,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:31:06,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:31:06,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:31:05" (1/3) ... [2022-11-18 18:31:06,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@543413eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:31:06, skipping insertion in model container [2022-11-18 18:31:06,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:06" (2/3) ... [2022-11-18 18:31:06,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@543413eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:31:06, skipping insertion in model container [2022-11-18 18:31:06,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:31:06" (3/3) ... [2022-11-18 18:31:06,881 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2022-11-18 18:31:06,891 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 18:31:06,902 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:31:06,903 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 18:31:06,903 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 18:31:06,989 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:31:07,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 65 transitions, 140 flow [2022-11-18 18:31:07,072 INFO L130 PetriNetUnfolder]: 7/75 cut-off events. [2022-11-18 18:31:07,072 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:31:07,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 75 events. 7/75 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 115 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 56. Up to 4 conditions per place. [2022-11-18 18:31:07,078 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 65 transitions, 140 flow [2022-11-18 18:31:07,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 64 transitions, 136 flow [2022-11-18 18:31:07,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:31:07,101 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;@62bb2cb0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:31:07,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-18 18:31:07,114 INFO L130 PetriNetUnfolder]: 3/39 cut-off events. [2022-11-18 18:31:07,114 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:31:07,115 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:07,115 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] [2022-11-18 18:31:07,116 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 18:31:07,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:07,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1639615880, now seen corresponding path program 1 times [2022-11-18 18:31:07,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:07,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659696713] [2022-11-18 18:31:07,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:07,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:07,520 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 18:31:07,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:07,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659696713] [2022-11-18 18:31:07,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659696713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:31:07,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:31:07,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:31:07,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726103134] [2022-11-18 18:31:07,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:31:07,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:31:07,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:07,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:31:07,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:31:07,572 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 65 [2022-11-18 18:31:07,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 18:31:07,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:07,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 65 [2022-11-18 18:31:07,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:07,700 INFO L130 PetriNetUnfolder]: 56/168 cut-off events. [2022-11-18 18:31:07,700 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-18 18:31:07,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 168 events. 56/168 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 468 event pairs, 12 based on Foata normal form. 94/255 useless extension candidates. Maximal degree in co-relation 263. Up to 56 conditions per place. [2022-11-18 18:31:07,705 INFO L137 encePairwiseOnDemand]: 52/65 looper letters, 21 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2022-11-18 18:31:07,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 184 flow [2022-11-18 18:31:07,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:31:07,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 18:31:07,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2022-11-18 18:31:07,720 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8246153846153846 [2022-11-18 18:31:07,721 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 268 transitions. [2022-11-18 18:31:07,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 268 transitions. [2022-11-18 18:31:07,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:07,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 268 transitions. [2022-11-18 18:31:07,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 53.6) internal successors, (268), 5 states have internal predecessors, (268), 0 states have call successors, (0), 0 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 18:31:07,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 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 18:31:07,735 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 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 18:31:07,737 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 136 flow. Second operand 5 states and 268 transitions. [2022-11-18 18:31:07,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 184 flow [2022-11-18 18:31:07,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:31:07,745 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 141 flow [2022-11-18 18:31:07,747 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=141, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2022-11-18 18:31:07,751 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, -7 predicate places. [2022-11-18 18:31:07,751 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 141 flow [2022-11-18 18:31:07,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 18:31:07,752 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:07,752 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-18 18:31:07,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:31:07,753 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 18:31:07,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:07,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1110371967, now seen corresponding path program 1 times [2022-11-18 18:31:07,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:07,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890478916] [2022-11-18 18:31:07,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:07,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:31:07,785 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:31:07,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:31:07,827 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:31:07,827 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:31:07,829 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-18 18:31:07,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-18 18:31:07,832 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-11-18 18:31:07,832 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-18 18:31:07,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:31:07,833 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-18 18:31:07,836 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:31:07,836 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-18 18:31:07,865 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:31:07,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 92 transitions, 208 flow [2022-11-18 18:31:07,888 INFO L130 PetriNetUnfolder]: 10/101 cut-off events. [2022-11-18 18:31:07,888 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 18:31:07,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 101 events. 10/101 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 174 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2022-11-18 18:31:07,890 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 92 transitions, 208 flow [2022-11-18 18:31:07,892 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 77 transitions, 169 flow [2022-11-18 18:31:07,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:31:07,895 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;@62bb2cb0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:31:07,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-18 18:31:07,902 INFO L130 PetriNetUnfolder]: 3/40 cut-off events. [2022-11-18 18:31:07,903 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:31:07,903 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:07,903 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] [2022-11-18 18:31:07,904 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:31:07,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:07,904 INFO L85 PathProgramCache]: Analyzing trace with hash -962746986, now seen corresponding path program 1 times [2022-11-18 18:31:07,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:07,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743616036] [2022-11-18 18:31:07,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:07,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:08,004 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 18:31:08,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:08,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743616036] [2022-11-18 18:31:08,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743616036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:31:08,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:31:08,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:31:08,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538154702] [2022-11-18 18:31:08,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:31:08,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:31:08,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:08,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:31:08,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:31:08,009 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 92 [2022-11-18 18:31:08,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 18:31:08,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:08,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 92 [2022-11-18 18:31:08,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:08,480 INFO L130 PetriNetUnfolder]: 740/1312 cut-off events. [2022-11-18 18:31:08,480 INFO L131 PetriNetUnfolder]: For 161/161 co-relation queries the response was YES. [2022-11-18 18:31:08,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2596 conditions, 1312 events. 740/1312 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7286 event pairs, 122 based on Foata normal form. 768/2032 useless extension candidates. Maximal degree in co-relation 2564. Up to 667 conditions per place. [2022-11-18 18:31:08,499 INFO L137 encePairwiseOnDemand]: 75/92 looper letters, 34 selfloop transitions, 9 changer transitions 0/80 dead transitions. [2022-11-18 18:31:08,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 80 transitions, 271 flow [2022-11-18 18:31:08,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:31:08,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 18:31:08,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 340 transitions. [2022-11-18 18:31:08,502 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7391304347826086 [2022-11-18 18:31:08,503 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 340 transitions. [2022-11-18 18:31:08,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 340 transitions. [2022-11-18 18:31:08,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:08,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 340 transitions. [2022-11-18 18:31:08,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 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 18:31:08,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 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 18:31:08,508 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 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 18:31:08,508 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 169 flow. Second operand 5 states and 340 transitions. [2022-11-18 18:31:08,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 80 transitions, 271 flow [2022-11-18 18:31:08,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 80 transitions, 268 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-18 18:31:08,512 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 186 flow [2022-11-18 18:31:08,512 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2022-11-18 18:31:08,513 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -10 predicate places. [2022-11-18 18:31:08,513 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 186 flow [2022-11-18 18:31:08,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 18:31:08,514 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:08,514 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] [2022-11-18 18:31:08,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 18:31:08,515 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:31:08,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:08,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1795024708, now seen corresponding path program 1 times [2022-11-18 18:31:08,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:08,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057206990] [2022-11-18 18:31:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:08,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:08,687 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 18:31:08,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:08,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057206990] [2022-11-18 18:31:08,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057206990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:31:08,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:31:08,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:31:08,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962516321] [2022-11-18 18:31:08,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:31:08,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:31:08,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:08,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:31:08,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:31:08,695 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 92 [2022-11-18 18:31:08,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 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 18:31:08,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:08,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 92 [2022-11-18 18:31:08,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:08,805 INFO L130 PetriNetUnfolder]: 38/250 cut-off events. [2022-11-18 18:31:08,805 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-11-18 18:31:08,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 250 events. 38/250 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1091 event pairs, 6 based on Foata normal form. 46/295 useless extension candidates. Maximal degree in co-relation 392. Up to 50 conditions per place. [2022-11-18 18:31:08,808 INFO L137 encePairwiseOnDemand]: 86/92 looper letters, 6 selfloop transitions, 6 changer transitions 0/63 dead transitions. [2022-11-18 18:31:08,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 210 flow [2022-11-18 18:31:08,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:31:08,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:31:08,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2022-11-18 18:31:08,816 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7608695652173914 [2022-11-18 18:31:08,816 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 210 transitions. [2022-11-18 18:31:08,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 210 transitions. [2022-11-18 18:31:08,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:08,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 210 transitions. [2022-11-18 18:31:08,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 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 18:31:08,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 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 18:31:08,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 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 18:31:08,823 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 186 flow. Second operand 3 states and 210 transitions. [2022-11-18 18:31:08,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 210 flow [2022-11-18 18:31:08,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 63 transitions, 204 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-18 18:31:08,829 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 180 flow [2022-11-18 18:31:08,829 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2022-11-18 18:31:08,833 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -9 predicate places. [2022-11-18 18:31:08,833 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 180 flow [2022-11-18 18:31:08,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 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 18:31:08,834 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:08,835 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] [2022-11-18 18:31:08,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 18:31:08,836 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:31:08,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:08,837 INFO L85 PathProgramCache]: Analyzing trace with hash -772977970, now seen corresponding path program 1 times [2022-11-18 18:31:08,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:08,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214692920] [2022-11-18 18:31:08,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:08,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:09,096 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 18:31:09,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:09,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214692920] [2022-11-18 18:31:09,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214692920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:31:09,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:31:09,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:31:09,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858369610] [2022-11-18 18:31:09,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:31:09,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:31:09,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:09,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:31:09,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:31:09,100 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 92 [2022-11-18 18:31:09,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 180 flow. Second operand has 6 states, 6 states have (on average 53.166666666666664) internal successors, (319), 6 states have internal predecessors, (319), 0 states have call successors, (0), 0 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 18:31:09,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:09,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 92 [2022-11-18 18:31:09,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:09,277 INFO L130 PetriNetUnfolder]: 91/341 cut-off events. [2022-11-18 18:31:09,278 INFO L131 PetriNetUnfolder]: For 198/198 co-relation queries the response was YES. [2022-11-18 18:31:09,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 944 conditions, 341 events. 91/341 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1860 event pairs, 9 based on Foata normal form. 3/337 useless extension candidates. Maximal degree in co-relation 906. Up to 145 conditions per place. [2022-11-18 18:31:09,282 INFO L137 encePairwiseOnDemand]: 83/92 looper letters, 44 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2022-11-18 18:31:09,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 90 transitions, 410 flow [2022-11-18 18:31:09,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:31:09,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 18:31:09,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 408 transitions. [2022-11-18 18:31:09,284 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2022-11-18 18:31:09,284 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 408 transitions. [2022-11-18 18:31:09,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 408 transitions. [2022-11-18 18:31:09,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:09,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 408 transitions. [2022-11-18 18:31:09,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.285714285714285) internal successors, (408), 7 states have internal predecessors, (408), 0 states have call successors, (0), 0 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 18:31:09,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 states have internal predecessors, (736), 0 states have call successors, (0), 0 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 18:31:09,289 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 states have internal predecessors, (736), 0 states have call successors, (0), 0 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 18:31:09,289 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 180 flow. Second operand 7 states and 408 transitions. [2022-11-18 18:31:09,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 90 transitions, 410 flow [2022-11-18 18:31:09,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 90 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:31:09,293 INFO L231 Difference]: Finished difference. Result has 76 places, 69 transitions, 258 flow [2022-11-18 18:31:09,294 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=258, PETRI_PLACES=76, PETRI_TRANSITIONS=69} [2022-11-18 18:31:09,294 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -1 predicate places. [2022-11-18 18:31:09,295 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 69 transitions, 258 flow [2022-11-18 18:31:09,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 53.166666666666664) internal successors, (319), 6 states have internal predecessors, (319), 0 states have call successors, (0), 0 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 18:31:09,295 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:09,296 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-11-18 18:31:09,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 18:31:09,296 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:31:09,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:09,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1470751083, now seen corresponding path program 1 times [2022-11-18 18:31:09,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:09,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084938226] [2022-11-18 18:31:09,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:09,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:31:09,315 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:31:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:31:09,331 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:31:09,332 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:31:09,332 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-18 18:31:09,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-18 18:31:09,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-11-18 18:31:09,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-18 18:31:09,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-18 18:31:09,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 18:31:09,334 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-18 18:31:09,334 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:31:09,335 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-18 18:31:09,368 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:31:09,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 119 transitions, 280 flow [2022-11-18 18:31:09,393 INFO L130 PetriNetUnfolder]: 13/127 cut-off events. [2022-11-18 18:31:09,394 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-18 18:31:09,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 127 events. 13/127 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 228 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 141. Up to 8 conditions per place. [2022-11-18 18:31:09,395 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 119 transitions, 280 flow [2022-11-18 18:31:09,397 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 90 transitions, 204 flow [2022-11-18 18:31:09,400 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:31:09,404 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;@62bb2cb0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:31:09,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-18 18:31:09,408 INFO L130 PetriNetUnfolder]: 3/39 cut-off events. [2022-11-18 18:31:09,409 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:31:09,409 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:09,409 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] [2022-11-18 18:31:09,409 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-18 18:31:09,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:09,410 INFO L85 PathProgramCache]: Analyzing trace with hash -2063979860, now seen corresponding path program 1 times [2022-11-18 18:31:09,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:09,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292886961] [2022-11-18 18:31:09,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:09,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:09,488 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 18:31:09,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:09,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292886961] [2022-11-18 18:31:09,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292886961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:31:09,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:31:09,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:31:09,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956230106] [2022-11-18 18:31:09,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:31:09,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:31:09,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:09,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:31:09,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:31:09,491 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 119 [2022-11-18 18:31:09,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 90 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 18:31:09,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:09,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 119 [2022-11-18 18:31:09,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:11,183 INFO L130 PetriNetUnfolder]: 6323/9886 cut-off events. [2022-11-18 18:31:11,184 INFO L131 PetriNetUnfolder]: For 2152/2152 co-relation queries the response was YES. [2022-11-18 18:31:11,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19896 conditions, 9886 events. 6323/9886 cut-off events. For 2152/2152 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 65986 event pairs, 1736 based on Foata normal form. 5068/14571 useless extension candidates. Maximal degree in co-relation 19863. Up to 5413 conditions per place. [2022-11-18 18:31:11,305 INFO L137 encePairwiseOnDemand]: 98/119 looper letters, 47 selfloop transitions, 12 changer transitions 0/99 dead transitions. [2022-11-18 18:31:11,305 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 364 flow [2022-11-18 18:31:11,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:31:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 18:31:11,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 412 transitions. [2022-11-18 18:31:11,310 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.692436974789916 [2022-11-18 18:31:11,310 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 412 transitions. [2022-11-18 18:31:11,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 412 transitions. [2022-11-18 18:31:11,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:11,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 412 transitions. [2022-11-18 18:31:11,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.4) internal successors, (412), 5 states have internal predecessors, (412), 0 states have call successors, (0), 0 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 18:31:11,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 119.0) internal successors, (714), 6 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:11,318 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 119.0) internal successors, (714), 6 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:11,318 INFO L175 Difference]: Start difference. First operand has 90 places, 90 transitions, 204 flow. Second operand 5 states and 412 transitions. [2022-11-18 18:31:11,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 364 flow [2022-11-18 18:31:11,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 99 transitions, 353 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-11-18 18:31:11,330 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 231 flow [2022-11-18 18:31:11,331 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2022-11-18 18:31:11,334 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, -13 predicate places. [2022-11-18 18:31:11,334 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 231 flow [2022-11-18 18:31:11,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 18:31:11,338 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:11,338 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] [2022-11-18 18:31:11,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 18:31:11,343 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-18 18:31:11,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:11,345 INFO L85 PathProgramCache]: Analyzing trace with hash -985126729, now seen corresponding path program 1 times [2022-11-18 18:31:11,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:11,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199402043] [2022-11-18 18:31:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:11,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:11,460 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 18:31:11,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:11,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199402043] [2022-11-18 18:31:11,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199402043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:31:11,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:31:11,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:31:11,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415936996] [2022-11-18 18:31:11,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:31:11,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:31:11,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:11,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:31:11,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:31:11,470 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 119 [2022-11-18 18:31:11,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 231 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 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 18:31:11,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:11,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 119 [2022-11-18 18:31:11,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:11,628 INFO L130 PetriNetUnfolder]: 146/567 cut-off events. [2022-11-18 18:31:11,628 INFO L131 PetriNetUnfolder]: For 194/194 co-relation queries the response was YES. [2022-11-18 18:31:11,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1147 conditions, 567 events. 146/567 cut-off events. For 194/194 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3229 event pairs, 16 based on Foata normal form. 225/787 useless extension candidates. Maximal degree in co-relation 1110. Up to 168 conditions per place. [2022-11-18 18:31:11,633 INFO L137 encePairwiseOnDemand]: 111/119 looper letters, 8 selfloop transitions, 8 changer transitions 0/75 dead transitions. [2022-11-18 18:31:11,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 75 transitions, 264 flow [2022-11-18 18:31:11,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:31:11,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:31:11,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2022-11-18 18:31:11,635 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7282913165266106 [2022-11-18 18:31:11,635 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2022-11-18 18:31:11,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2022-11-18 18:31:11,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:11,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2022-11-18 18:31:11,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 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 18:31:11,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 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 18:31:11,639 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 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 18:31:11,639 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 231 flow. Second operand 3 states and 260 transitions. [2022-11-18 18:31:11,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 75 transitions, 264 flow [2022-11-18 18:31:11,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 75 transitions, 256 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-18 18:31:11,642 INFO L231 Difference]: Finished difference. Result has 78 places, 72 transitions, 221 flow [2022-11-18 18:31:11,642 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=78, PETRI_TRANSITIONS=72} [2022-11-18 18:31:11,643 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, -12 predicate places. [2022-11-18 18:31:11,643 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 72 transitions, 221 flow [2022-11-18 18:31:11,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 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 18:31:11,644 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:11,644 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] [2022-11-18 18:31:11,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 18:31:11,644 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-18 18:31:11,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:11,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1186376958, now seen corresponding path program 1 times [2022-11-18 18:31:11,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:11,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764825749] [2022-11-18 18:31:11,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:11,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:11,866 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 18:31:11,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:11,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764825749] [2022-11-18 18:31:11,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764825749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:31:11,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:31:11,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:31:11,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487061586] [2022-11-18 18:31:11,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:31:11,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:31:11,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:11,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:31:11,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:31:11,870 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 119 [2022-11-18 18:31:11,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 221 flow. Second operand has 6 states, 6 states have (on average 62.166666666666664) internal successors, (373), 6 states have internal predecessors, (373), 0 states have call successors, (0), 0 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 18:31:11,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:11,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 119 [2022-11-18 18:31:11,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:12,232 INFO L130 PetriNetUnfolder]: 316/963 cut-off events. [2022-11-18 18:31:12,233 INFO L131 PetriNetUnfolder]: For 667/667 co-relation queries the response was YES. [2022-11-18 18:31:12,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2792 conditions, 963 events. 316/963 cut-off events. For 667/667 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7296 event pairs, 20 based on Foata normal form. 6/950 useless extension candidates. Maximal degree in co-relation 2753. Up to 497 conditions per place. [2022-11-18 18:31:12,243 INFO L137 encePairwiseOnDemand]: 107/119 looper letters, 61 selfloop transitions, 17 changer transitions 0/114 dead transitions. [2022-11-18 18:31:12,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 114 transitions, 553 flow [2022-11-18 18:31:12,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:31:12,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 18:31:12,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 491 transitions. [2022-11-18 18:31:12,247 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5894357743097239 [2022-11-18 18:31:12,247 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 491 transitions. [2022-11-18 18:31:12,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 491 transitions. [2022-11-18 18:31:12,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:12,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 491 transitions. [2022-11-18 18:31:12,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.14285714285714) internal successors, (491), 7 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:12,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 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 18:31:12,253 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 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 18:31:12,253 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 221 flow. Second operand 7 states and 491 transitions. [2022-11-18 18:31:12,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 114 transitions, 553 flow [2022-11-18 18:31:12,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 114 transitions, 532 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:31:12,261 INFO L231 Difference]: Finished difference. Result has 86 places, 84 transitions, 336 flow [2022-11-18 18:31:12,262 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=336, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2022-11-18 18:31:12,264 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, -4 predicate places. [2022-11-18 18:31:12,264 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 336 flow [2022-11-18 18:31:12,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.166666666666664) internal successors, (373), 6 states have internal predecessors, (373), 0 states have call successors, (0), 0 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 18:31:12,265 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:12,265 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] [2022-11-18 18:31:12,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 18:31:12,266 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-18 18:31:12,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:12,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1010668536, now seen corresponding path program 2 times [2022-11-18 18:31:12,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:12,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178602234] [2022-11-18 18:31:12,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:12,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:12,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:12,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178602234] [2022-11-18 18:31:12,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178602234] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:31:12,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233875613] [2022-11-18 18:31:12,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:31:12,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:12,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:31:12,631 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:31:12,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:31:12,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:31:12,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:31:12,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:31:12,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:31:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:13,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:31:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:13,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233875613] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:31:13,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:31:13,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-11-18 18:31:13,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862833799] [2022-11-18 18:31:13,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:31:13,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 18:31:13,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:13,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 18:31:13,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-11-18 18:31:13,466 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 119 [2022-11-18 18:31:13,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 336 flow. Second operand has 23 states, 23 states have (on average 61.608695652173914) internal successors, (1417), 23 states have internal predecessors, (1417), 0 states have call successors, (0), 0 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 18:31:13,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:13,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 119 [2022-11-18 18:31:13,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:14,806 INFO L130 PetriNetUnfolder]: 647/1895 cut-off events. [2022-11-18 18:31:14,807 INFO L131 PetriNetUnfolder]: For 1725/1725 co-relation queries the response was YES. [2022-11-18 18:31:14,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5724 conditions, 1895 events. 647/1895 cut-off events. For 1725/1725 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16037 event pairs, 14 based on Foata normal form. 10/1892 useless extension candidates. Maximal degree in co-relation 5678. Up to 505 conditions per place. [2022-11-18 18:31:14,834 INFO L137 encePairwiseOnDemand]: 104/119 looper letters, 101 selfloop transitions, 41 changer transitions 0/177 dead transitions. [2022-11-18 18:31:14,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 177 transitions, 1045 flow [2022-11-18 18:31:14,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:31:14,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-18 18:31:14,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 835 transitions. [2022-11-18 18:31:14,838 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.584733893557423 [2022-11-18 18:31:14,839 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 835 transitions. [2022-11-18 18:31:14,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 835 transitions. [2022-11-18 18:31:14,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:14,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 835 transitions. [2022-11-18 18:31:14,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 69.58333333333333) internal successors, (835), 12 states have internal predecessors, (835), 0 states have call successors, (0), 0 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 18:31:14,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 119.0) internal successors, (1547), 13 states have internal predecessors, (1547), 0 states have call successors, (0), 0 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 18:31:14,846 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 119.0) internal successors, (1547), 13 states have internal predecessors, (1547), 0 states have call successors, (0), 0 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 18:31:14,847 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 336 flow. Second operand 12 states and 835 transitions. [2022-11-18 18:31:14,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 177 transitions, 1045 flow [2022-11-18 18:31:14,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 177 transitions, 1032 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 18:31:14,855 INFO L231 Difference]: Finished difference. Result has 99 places, 108 transitions, 597 flow [2022-11-18 18:31:14,856 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=597, PETRI_PLACES=99, PETRI_TRANSITIONS=108} [2022-11-18 18:31:14,857 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, 9 predicate places. [2022-11-18 18:31:14,858 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 108 transitions, 597 flow [2022-11-18 18:31:14,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 61.608695652173914) internal successors, (1417), 23 states have internal predecessors, (1417), 0 states have call successors, (0), 0 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 18:31:14,861 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:14,861 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 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 18:31:14,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:31:15,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:15,068 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-18 18:31:15,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:15,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1103997102, now seen corresponding path program 1 times [2022-11-18 18:31:15,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:15,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590231760] [2022-11-18 18:31:15,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:15,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:31:15,085 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:31:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:31:15,102 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:31:15,102 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:31:15,102 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-18 18:31:15,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-18 18:31:15,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-11-18 18:31:15,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-18 18:31:15,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-18 18:31:15,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-18 18:31:15,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 18:31:15,104 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2022-11-18 18:31:15,104 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:31:15,104 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-18 18:31:15,140 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:31:15,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 146 transitions, 356 flow [2022-11-18 18:31:15,163 INFO L130 PetriNetUnfolder]: 16/153 cut-off events. [2022-11-18 18:31:15,164 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-18 18:31:15,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 153 events. 16/153 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 288 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 173. Up to 10 conditions per place. [2022-11-18 18:31:15,165 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 146 transitions, 356 flow [2022-11-18 18:31:15,166 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 103 transitions, 241 flow [2022-11-18 18:31:15,168 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:31:15,168 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;@62bb2cb0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:31:15,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-18 18:31:15,172 INFO L130 PetriNetUnfolder]: 3/39 cut-off events. [2022-11-18 18:31:15,172 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:31:15,172 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:15,172 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] [2022-11-18 18:31:15,173 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:31:15,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:15,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1664082742, now seen corresponding path program 1 times [2022-11-18 18:31:15,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:15,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555553008] [2022-11-18 18:31:15,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:15,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:15,217 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 18:31:15,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:15,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555553008] [2022-11-18 18:31:15,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555553008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:31:15,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:31:15,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:31:15,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599058808] [2022-11-18 18:31:15,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:31:15,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:31:15,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:15,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:31:15,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:31:15,220 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 146 [2022-11-18 18:31:15,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 103 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 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 18:31:15,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:15,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 146 [2022-11-18 18:31:15,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:24,866 INFO L130 PetriNetUnfolder]: 50080/69789 cut-off events. [2022-11-18 18:31:24,866 INFO L131 PetriNetUnfolder]: For 20816/20816 co-relation queries the response was YES. [2022-11-18 18:31:25,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143487 conditions, 69789 events. 50080/69789 cut-off events. For 20816/20816 co-relation queries the response was YES. Maximal size of possible extension queue 2579. Compared 487579 event pairs, 15030 based on Foata normal form. 34578/102288 useless extension candidates. Maximal degree in co-relation 143453. Up to 42229 conditions per place. [2022-11-18 18:31:25,583 INFO L137 encePairwiseOnDemand]: 121/146 looper letters, 60 selfloop transitions, 15 changer transitions 0/118 dead transitions. [2022-11-18 18:31:25,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 118 transitions, 463 flow [2022-11-18 18:31:25,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:31:25,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 18:31:25,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 484 transitions. [2022-11-18 18:31:25,588 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.663013698630137 [2022-11-18 18:31:25,589 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 484 transitions. [2022-11-18 18:31:25,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 484 transitions. [2022-11-18 18:31:25,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:25,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 484 transitions. [2022-11-18 18:31:25,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.8) internal successors, (484), 5 states have internal predecessors, (484), 0 states have call successors, (0), 0 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 18:31:25,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 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 18:31:25,594 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 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 18:31:25,594 INFO L175 Difference]: Start difference. First operand has 103 places, 103 transitions, 241 flow. Second operand 5 states and 484 transitions. [2022-11-18 18:31:25,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 118 transitions, 463 flow [2022-11-18 18:31:25,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 118 transitions, 438 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-11-18 18:31:25,606 INFO L231 Difference]: Finished difference. Result has 87 places, 87 transitions, 276 flow [2022-11-18 18:31:25,606 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=276, PETRI_PLACES=87, PETRI_TRANSITIONS=87} [2022-11-18 18:31:25,608 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -16 predicate places. [2022-11-18 18:31:25,608 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 87 transitions, 276 flow [2022-11-18 18:31:25,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 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 18:31:25,608 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:25,609 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] [2022-11-18 18:31:25,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 18:31:25,609 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:31:25,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:25,611 INFO L85 PathProgramCache]: Analyzing trace with hash -331157494, now seen corresponding path program 1 times [2022-11-18 18:31:25,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:25,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772719458] [2022-11-18 18:31:25,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:25,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:25,820 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 18:31:25,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:25,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772719458] [2022-11-18 18:31:25,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772719458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:31:25,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:31:25,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:31:25,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225068116] [2022-11-18 18:31:25,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:31:25,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:31:25,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:25,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:31:25,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:31:25,824 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 146 [2022-11-18 18:31:25,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 87 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 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 18:31:25,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:25,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 146 [2022-11-18 18:31:25,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:26,120 INFO L130 PetriNetUnfolder]: 414/1413 cut-off events. [2022-11-18 18:31:26,120 INFO L131 PetriNetUnfolder]: For 504/504 co-relation queries the response was YES. [2022-11-18 18:31:26,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2913 conditions, 1413 events. 414/1413 cut-off events. For 504/504 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 10102 event pairs, 50 based on Foata normal form. 765/2169 useless extension candidates. Maximal degree in co-relation 2875. Up to 460 conditions per place. [2022-11-18 18:31:26,135 INFO L137 encePairwiseOnDemand]: 136/146 looper letters, 10 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2022-11-18 18:31:26,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 87 transitions, 318 flow [2022-11-18 18:31:26,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:31:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:31:26,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2022-11-18 18:31:26,138 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7077625570776256 [2022-11-18 18:31:26,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2022-11-18 18:31:26,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2022-11-18 18:31:26,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:26,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2022-11-18 18:31:26,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 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 18:31:26,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 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 18:31:26,142 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 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 18:31:26,142 INFO L175 Difference]: Start difference. First operand has 87 places, 87 transitions, 276 flow. Second operand 3 states and 310 transitions. [2022-11-18 18:31:26,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 87 transitions, 318 flow [2022-11-18 18:31:26,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 308 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-18 18:31:26,147 INFO L231 Difference]: Finished difference. Result has 88 places, 83 transitions, 262 flow [2022-11-18 18:31:26,148 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2022-11-18 18:31:26,149 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -15 predicate places. [2022-11-18 18:31:26,149 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 262 flow [2022-11-18 18:31:26,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 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 18:31:26,150 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:26,150 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] [2022-11-18 18:31:26,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 18:31:26,151 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:31:26,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:26,152 INFO L85 PathProgramCache]: Analyzing trace with hash -238053751, now seen corresponding path program 1 times [2022-11-18 18:31:26,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:26,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614556550] [2022-11-18 18:31:26,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:26,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:26,314 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 18:31:26,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:26,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614556550] [2022-11-18 18:31:26,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614556550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:31:26,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:31:26,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:31:26,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214557756] [2022-11-18 18:31:26,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:31:26,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:31:26,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:26,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:31:26,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:31:26,320 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 146 [2022-11-18 18:31:26,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 states have internal predecessors, (427), 0 states have call successors, (0), 0 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 18:31:26,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:26,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 146 [2022-11-18 18:31:26,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:26,931 INFO L130 PetriNetUnfolder]: 851/2282 cut-off events. [2022-11-18 18:31:26,932 INFO L131 PetriNetUnfolder]: For 1721/1721 co-relation queries the response was YES. [2022-11-18 18:31:26,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6882 conditions, 2282 events. 851/2282 cut-off events. For 1721/1721 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 19682 event pairs, 37 based on Foata normal form. 10/2254 useless extension candidates. Maximal degree in co-relation 6842. Up to 1407 conditions per place. [2022-11-18 18:31:26,959 INFO L137 encePairwiseOnDemand]: 131/146 looper letters, 78 selfloop transitions, 22 changer transitions 0/138 dead transitions. [2022-11-18 18:31:26,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 138 transitions, 696 flow [2022-11-18 18:31:26,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:31:26,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 18:31:26,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 574 transitions. [2022-11-18 18:31:26,963 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5616438356164384 [2022-11-18 18:31:26,963 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 574 transitions. [2022-11-18 18:31:26,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 574 transitions. [2022-11-18 18:31:26,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:26,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 574 transitions. [2022-11-18 18:31:26,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 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 18:31:26,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 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 18:31:26,970 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 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 18:31:26,970 INFO L175 Difference]: Start difference. First operand has 88 places, 83 transitions, 262 flow. Second operand 7 states and 574 transitions. [2022-11-18 18:31:26,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 138 transitions, 696 flow [2022-11-18 18:31:26,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 138 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:31:26,979 INFO L231 Difference]: Finished difference. Result has 96 places, 99 transitions, 414 flow [2022-11-18 18:31:26,980 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=414, PETRI_PLACES=96, PETRI_TRANSITIONS=99} [2022-11-18 18:31:26,981 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -7 predicate places. [2022-11-18 18:31:26,981 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 99 transitions, 414 flow [2022-11-18 18:31:26,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 states have internal predecessors, (427), 0 states have call successors, (0), 0 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 18:31:26,982 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:26,982 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] [2022-11-18 18:31:26,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 18:31:26,983 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:31:26,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:26,984 INFO L85 PathProgramCache]: Analyzing trace with hash -98483125, now seen corresponding path program 2 times [2022-11-18 18:31:26,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:26,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969461669] [2022-11-18 18:31:26,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:26,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:27,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:27,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969461669] [2022-11-18 18:31:27,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969461669] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:31:27,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379178875] [2022-11-18 18:31:27,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:31:27,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:27,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:31:27,263 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:31:27,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:31:27,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:31:27,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:31:27,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:31:27,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:31:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:27,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:31:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:28,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379178875] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:31:28,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:31:28,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-11-18 18:31:28,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954651482] [2022-11-18 18:31:28,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:31:28,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 18:31:28,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:28,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 18:31:28,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-11-18 18:31:28,032 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 146 [2022-11-18 18:31:28,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 99 transitions, 414 flow. Second operand has 23 states, 23 states have (on average 70.6086956521739) internal successors, (1624), 23 states have internal predecessors, (1624), 0 states have call successors, (0), 0 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 18:31:28,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:28,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 146 [2022-11-18 18:31:28,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:29,780 INFO L130 PetriNetUnfolder]: 1825/4725 cut-off events. [2022-11-18 18:31:29,780 INFO L131 PetriNetUnfolder]: For 4594/4594 co-relation queries the response was YES. [2022-11-18 18:31:29,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14717 conditions, 4725 events. 1825/4725 cut-off events. For 4594/4594 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 47036 event pairs, 23 based on Foata normal form. 20/4722 useless extension candidates. Maximal degree in co-relation 14670. Up to 1463 conditions per place. [2022-11-18 18:31:29,814 INFO L137 encePairwiseOnDemand]: 127/146 looper letters, 130 selfloop transitions, 54 changer transitions 0/221 dead transitions. [2022-11-18 18:31:29,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 221 transitions, 1350 flow [2022-11-18 18:31:29,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:31:29,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-18 18:31:29,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 981 transitions. [2022-11-18 18:31:29,818 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.559931506849315 [2022-11-18 18:31:29,818 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 981 transitions. [2022-11-18 18:31:29,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 981 transitions. [2022-11-18 18:31:29,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:29,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 981 transitions. [2022-11-18 18:31:29,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 81.75) internal successors, (981), 12 states have internal predecessors, (981), 0 states have call successors, (0), 0 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 18:31:29,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 146.0) internal successors, (1898), 13 states have internal predecessors, (1898), 0 states have call successors, (0), 0 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 18:31:29,826 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 146.0) internal successors, (1898), 13 states have internal predecessors, (1898), 0 states have call successors, (0), 0 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 18:31:29,826 INFO L175 Difference]: Start difference. First operand has 96 places, 99 transitions, 414 flow. Second operand 12 states and 981 transitions. [2022-11-18 18:31:29,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 221 transitions, 1350 flow [2022-11-18 18:31:29,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 221 transitions, 1334 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 18:31:29,839 INFO L231 Difference]: Finished difference. Result has 109 places, 131 transitions, 761 flow [2022-11-18 18:31:29,839 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=761, PETRI_PLACES=109, PETRI_TRANSITIONS=131} [2022-11-18 18:31:29,840 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 6 predicate places. [2022-11-18 18:31:29,840 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 131 transitions, 761 flow [2022-11-18 18:31:29,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 70.6086956521739) internal successors, (1624), 23 states have internal predecessors, (1624), 0 states have call successors, (0), 0 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 18:31:29,841 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:29,841 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:31:29,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:31:30,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 18:31:30,047 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:31:30,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:30,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1523802607, now seen corresponding path program 3 times [2022-11-18 18:31:30,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:30,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538242578] [2022-11-18 18:31:30,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:30,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:30,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:30,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538242578] [2022-11-18 18:31:30,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538242578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:31:30,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584341715] [2022-11-18 18:31:30,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:31:30,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:30,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:31:30,225 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:31:30,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:31:30,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 18:31:30,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:31:30,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 18:31:30,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:31:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:30,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:31:31,010 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:31,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584341715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:31:31,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:31:31,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 26 [2022-11-18 18:31:31,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733555046] [2022-11-18 18:31:31,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:31:31,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 18:31:31,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:31,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 18:31:31,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-11-18 18:31:31,014 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 146 [2022-11-18 18:31:31,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 131 transitions, 761 flow. Second operand has 26 states, 26 states have (on average 70.96153846153847) internal successors, (1845), 26 states have internal predecessors, (1845), 0 states have call successors, (0), 0 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 18:31:31,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:31,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 146 [2022-11-18 18:31:31,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:35,786 INFO L130 PetriNetUnfolder]: 4400/11216 cut-off events. [2022-11-18 18:31:35,786 INFO L131 PetriNetUnfolder]: For 16831/16831 co-relation queries the response was YES. [2022-11-18 18:31:35,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40284 conditions, 11216 events. 4400/11216 cut-off events. For 16831/16831 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 122816 event pairs, 54 based on Foata normal form. 180/11355 useless extension candidates. Maximal degree in co-relation 40232. Up to 2312 conditions per place. [2022-11-18 18:31:35,891 INFO L137 encePairwiseOnDemand]: 124/146 looper letters, 159 selfloop transitions, 202 changer transitions 0/398 dead transitions. [2022-11-18 18:31:35,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 398 transitions, 3160 flow [2022-11-18 18:31:35,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 18:31:35,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-18 18:31:35,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2445 transitions. [2022-11-18 18:31:35,901 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5233304794520548 [2022-11-18 18:31:35,901 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2445 transitions. [2022-11-18 18:31:35,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2445 transitions. [2022-11-18 18:31:35,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:35,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2445 transitions. [2022-11-18 18:31:35,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 76.40625) internal successors, (2445), 32 states have internal predecessors, (2445), 0 states have call successors, (0), 0 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 18:31:35,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 146.0) internal successors, (4818), 33 states have internal predecessors, (4818), 0 states have call successors, (0), 0 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 18:31:35,925 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 146.0) internal successors, (4818), 33 states have internal predecessors, (4818), 0 states have call successors, (0), 0 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 18:31:35,925 INFO L175 Difference]: Start difference. First operand has 109 places, 131 transitions, 761 flow. Second operand 32 states and 2445 transitions. [2022-11-18 18:31:35,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 398 transitions, 3160 flow [2022-11-18 18:31:35,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 398 transitions, 3031 flow, removed 48 selfloop flow, removed 4 redundant places. [2022-11-18 18:31:35,980 INFO L231 Difference]: Finished difference. Result has 137 places, 256 transitions, 1978 flow [2022-11-18 18:31:35,980 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1978, PETRI_PLACES=137, PETRI_TRANSITIONS=256} [2022-11-18 18:31:35,981 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 34 predicate places. [2022-11-18 18:31:35,982 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 256 transitions, 1978 flow [2022-11-18 18:31:35,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 70.96153846153847) internal successors, (1845), 26 states have internal predecessors, (1845), 0 states have call successors, (0), 0 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 18:31:35,983 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:35,984 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 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 18:31:35,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:31:36,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47f8b05-9409-47b1-9098-ed287235eebb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 18:31:36,189 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:31:36,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:36,189 INFO L85 PathProgramCache]: Analyzing trace with hash -977764559, now seen corresponding path program 1 times [2022-11-18 18:31:36,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:36,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249880758] [2022-11-18 18:31:36,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:36,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:31:36,207 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:31:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:31:36,225 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:31:36,226 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:31:36,226 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-18 18:31:36,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-11-18 18:31:36,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2022-11-18 18:31:36,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-11-18 18:31:36,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-11-18 18:31:36,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-11-18 18:31:36,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-11-18 18:31:36,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-18 18:31:36,228 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2022-11-18 18:31:36,229 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:31:36,229 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-18 18:31:36,306 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:31:36,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 173 transitions, 436 flow [2022-11-18 18:31:36,338 INFO L130 PetriNetUnfolder]: 19/179 cut-off events. [2022-11-18 18:31:36,339 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-18 18:31:36,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 179 events. 19/179 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 345 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 206. Up to 12 conditions per place. [2022-11-18 18:31:36,340 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 173 transitions, 436 flow [2022-11-18 18:31:36,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 116 transitions, 280 flow [2022-11-18 18:31:36,344 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:31:36,345 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;@62bb2cb0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:31:36,345 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-18 18:31:36,349 INFO L130 PetriNetUnfolder]: 3/41 cut-off events. [2022-11-18 18:31:36,349 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:31:36,350 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:36,350 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] [2022-11-18 18:31:36,350 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2022-11-18 18:31:36,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:36,351 INFO L85 PathProgramCache]: Analyzing trace with hash 187320508, now seen corresponding path program 1 times [2022-11-18 18:31:36,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:36,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980374755] [2022-11-18 18:31:36,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:36,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:36,492 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 18:31:36,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:36,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980374755] [2022-11-18 18:31:36,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980374755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:31:36,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:31:36,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:31:36,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608402959] [2022-11-18 18:31:36,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:31:36,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:31:36,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:36,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:31:36,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:31:36,495 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 173 [2022-11-18 18:31:36,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 116 transitions, 280 flow. Second operand has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 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 18:31:36,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:36,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 173 [2022-11-18 18:31:36,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand