./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_07-cond_racing2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/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_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_07-cond_racing2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/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_626b6d0e-33cc-4132-ace0-00df3f71484c/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 45d1947e02656e790dafd6ca03f6eadb14d0b370e2217b75740af9998d975bef --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:26:41,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:26:41,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:26:41,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:26:41,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:26:41,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:26:41,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:26:41,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:26:41,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:26:41,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:26:41,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:26:41,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:26:41,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:26:41,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:26:41,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:26:41,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:26:41,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:26:41,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:26:41,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:26:41,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:26:41,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:26:41,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:26:41,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:26:41,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:26:41,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:26:41,210 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:26:41,211 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:26:41,212 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:26:41,213 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:26:41,214 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:26:41,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:26:41,216 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:26:41,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:26:41,218 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:26:41,220 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:26:41,220 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:26:41,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:26:41,222 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:26:41,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:26:41,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:26:41,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:26:41,226 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:26:41,253 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:26:41,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:26:41,254 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:26:41,254 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:26:41,255 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:26:41,256 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:26:41,257 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:26:41,257 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:26:41,257 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:26:41,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:26:41,258 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:26:41,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:26:41,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:26:41,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:26:41,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:26:41,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:26:41,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:26:41,261 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:26:41,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:26:41,262 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:26:41,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:26:41,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:26:41,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:26:41,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:26:41,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:26:41,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:26:41,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:26:41,265 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:26:41,265 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:26:41,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:26:41,266 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:26:41,266 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:26:41,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:26:41,267 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_626b6d0e-33cc-4132-ace0-00df3f71484c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45d1947e02656e790dafd6ca03f6eadb14d0b370e2217b75740af9998d975bef [2022-11-18 20:26:41,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:26:41,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:26:41,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:26:41,650 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:26:41,651 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:26:41,653 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/goblint-regression/28-race_reach_07-cond_racing2.i [2022-11-18 20:26:41,742 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/data/dde0fdd98/6f90b6209b6a475d94619de8398d9add/FLAG678816548 [2022-11-18 20:26:42,526 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:26:42,527 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/sv-benchmarks/c/goblint-regression/28-race_reach_07-cond_racing2.i [2022-11-18 20:26:42,548 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/data/dde0fdd98/6f90b6209b6a475d94619de8398d9add/FLAG678816548 [2022-11-18 20:26:42,731 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/data/dde0fdd98/6f90b6209b6a475d94619de8398d9add [2022-11-18 20:26:42,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:26:42,741 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:26:42,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:26:42,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:26:42,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:26:42,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:26:42" (1/1) ... [2022-11-18 20:26:42,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e6bde23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:42, skipping insertion in model container [2022-11-18 20:26:42,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:26:42" (1/1) ... [2022-11-18 20:26:42,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:26:42,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:26:43,484 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_626b6d0e-33cc-4132-ace0-00df3f71484c/sv-benchmarks/c/goblint-regression/28-race_reach_07-cond_racing2.i[41322,41335] [2022-11-18 20:26:43,526 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:26:43,541 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:26:43,609 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_626b6d0e-33cc-4132-ace0-00df3f71484c/sv-benchmarks/c/goblint-regression/28-race_reach_07-cond_racing2.i[41322,41335] [2022-11-18 20:26:43,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:26:43,738 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:26:43,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:43 WrapperNode [2022-11-18 20:26:43,739 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:26:43,741 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:26:43,742 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:26:43,742 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:26:43,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:43" (1/1) ... [2022-11-18 20:26:43,783 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:43" (1/1) ... [2022-11-18 20:26:43,842 INFO L138 Inliner]: procedures = 270, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2022-11-18 20:26:43,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:26:43,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:26:43,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:26:43,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:26:43,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:43" (1/1) ... [2022-11-18 20:26:43,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:43" (1/1) ... [2022-11-18 20:26:43,874 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:43" (1/1) ... [2022-11-18 20:26:43,877 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:43" (1/1) ... [2022-11-18 20:26:43,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:43" (1/1) ... [2022-11-18 20:26:43,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:43" (1/1) ... [2022-11-18 20:26:43,895 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:43" (1/1) ... [2022-11-18 20:26:43,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:43" (1/1) ... [2022-11-18 20:26:43,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:26:43,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:26:43,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:26:43,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:26:43,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:43" (1/1) ... [2022-11-18 20:26:43,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:26:43,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:43,947 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:26:43,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:26:44,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:26:44,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:26:44,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:26:44,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:26:44,003 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 20:26:44,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:26:44,004 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-18 20:26:44,004 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-18 20:26:44,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:26:44,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:26:44,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:26:44,007 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:26:44,249 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:26:44,265 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:26:44,631 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:26:44,641 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:26:44,647 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-18 20:26:44,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:26:44 BoogieIcfgContainer [2022-11-18 20:26:44,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:26:44,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:26:44,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:26:44,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:26:44,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:26:42" (1/3) ... [2022-11-18 20:26:44,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a9cd354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:26:44, skipping insertion in model container [2022-11-18 20:26:44,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:26:43" (2/3) ... [2022-11-18 20:26:44,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a9cd354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:26:44, skipping insertion in model container [2022-11-18 20:26:44,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:26:44" (3/3) ... [2022-11-18 20:26:44,668 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_07-cond_racing2.i [2022-11-18 20:26:44,680 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:26:44,694 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:26:44,695 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:26:44,695 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:26:44,821 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-18 20:26:44,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 126 transitions, 260 flow [2022-11-18 20:26:45,111 INFO L130 PetriNetUnfolder]: 23/171 cut-off events. [2022-11-18 20:26:45,112 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 20:26:45,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 171 events. 23/171 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 390 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 86. Up to 6 conditions per place. [2022-11-18 20:26:45,120 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 126 transitions, 260 flow [2022-11-18 20:26:45,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 121 transitions, 247 flow [2022-11-18 20:26:45,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:26:45,163 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;@5e007ed9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:26:45,164 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 20:26:45,213 INFO L130 PetriNetUnfolder]: 8/109 cut-off events. [2022-11-18 20:26:45,215 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:26:45,216 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:26:45,217 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:45,218 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:26:45,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:45,225 INFO L85 PathProgramCache]: Analyzing trace with hash 279845650, now seen corresponding path program 1 times [2022-11-18 20:26:45,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:45,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267441712] [2022-11-18 20:26:45,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:45,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:45,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:45,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267441712] [2022-11-18 20:26:45,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267441712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:26:45,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:26:45,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:26:45,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987770695] [2022-11-18 20:26:45,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:26:45,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:26:45,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:45,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:26:45,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:26:45,657 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 126 [2022-11-18 20:26:45,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 121 transitions, 247 flow. Second operand has 2 states, 2 states have (on average 112.5) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:45,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:26:45,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 126 [2022-11-18 20:26:45,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:26:45,714 INFO L130 PetriNetUnfolder]: 6/148 cut-off events. [2022-11-18 20:26:45,715 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 20:26:45,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 148 events. 6/148 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 309 event pairs, 0 based on Foata normal form. 16/152 useless extension candidates. Maximal degree in co-relation 80. Up to 4 conditions per place. [2022-11-18 20:26:45,717 INFO L137 encePairwiseOnDemand]: 115/126 looper letters, 1 selfloop transitions, 0 changer transitions 19/109 dead transitions. [2022-11-18 20:26:45,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 109 transitions, 225 flow [2022-11-18 20:26:45,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:26:45,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:26:45,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 236 transitions. [2022-11-18 20:26:45,735 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9365079365079365 [2022-11-18 20:26:45,736 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 236 transitions. [2022-11-18 20:26:45,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 236 transitions. [2022-11-18 20:26:45,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:26:45,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 236 transitions. [2022-11-18 20:26:45,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 118.0) internal successors, (236), 2 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:45,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:45,752 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:45,755 INFO L175 Difference]: Start difference. First operand has 110 places, 121 transitions, 247 flow. Second operand 2 states and 236 transitions. [2022-11-18 20:26:45,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 109 transitions, 225 flow [2022-11-18 20:26:45,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 109 transitions, 225 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:26:45,764 INFO L231 Difference]: Finished difference. Result has 110 places, 90 transitions, 185 flow [2022-11-18 20:26:45,767 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=185, PETRI_PLACES=110, PETRI_TRANSITIONS=90} [2022-11-18 20:26:45,771 INFO L288 CegarLoopForPetriNet]: 110 programPoint places, 0 predicate places. [2022-11-18 20:26:45,772 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 90 transitions, 185 flow [2022-11-18 20:26:45,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 112.5) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:45,773 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:26:45,774 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:45,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:26:45,775 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:26:45,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:45,776 INFO L85 PathProgramCache]: Analyzing trace with hash -13557357, now seen corresponding path program 1 times [2022-11-18 20:26:45,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:45,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191342908] [2022-11-18 20:26:45,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:45,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:46,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:46,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191342908] [2022-11-18 20:26:46,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191342908] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:26:46,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:26:46,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:26:46,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795652906] [2022-11-18 20:26:46,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:26:46,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:26:46,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:46,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:26:46,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:26:46,035 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 126 [2022-11-18 20:26:46,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 90 transitions, 185 flow. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:46,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:26:46,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 126 [2022-11-18 20:26:46,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:26:46,080 INFO L130 PetriNetUnfolder]: 1/94 cut-off events. [2022-11-18 20:26:46,080 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:26:46,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 94 events. 1/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 107. Up to 6 conditions per place. [2022-11-18 20:26:46,082 INFO L137 encePairwiseOnDemand]: 123/126 looper letters, 8 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2022-11-18 20:26:46,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 92 transitions, 209 flow [2022-11-18 20:26:46,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:26:46,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:26:46,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 326 transitions. [2022-11-18 20:26:46,086 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8624338624338624 [2022-11-18 20:26:46,086 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 326 transitions. [2022-11-18 20:26:46,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 326 transitions. [2022-11-18 20:26:46,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:26:46,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 326 transitions. [2022-11-18 20:26:46,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:46,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:46,092 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:46,092 INFO L175 Difference]: Start difference. First operand has 110 places, 90 transitions, 185 flow. Second operand 3 states and 326 transitions. [2022-11-18 20:26:46,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 92 transitions, 209 flow [2022-11-18 20:26:46,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 92 transitions, 209 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:26:46,096 INFO L231 Difference]: Finished difference. Result has 96 places, 90 transitions, 193 flow [2022-11-18 20:26:46,097 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=193, PETRI_PLACES=96, PETRI_TRANSITIONS=90} [2022-11-18 20:26:46,098 INFO L288 CegarLoopForPetriNet]: 110 programPoint places, -14 predicate places. [2022-11-18 20:26:46,098 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 90 transitions, 193 flow [2022-11-18 20:26:46,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:46,098 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:26:46,099 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:46,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:26:46,099 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:26:46,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:46,100 INFO L85 PathProgramCache]: Analyzing trace with hash 19764734, now seen corresponding path program 1 times [2022-11-18 20:26:46,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:46,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337538686] [2022-11-18 20:26:46,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:46,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:26:46,137 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:26:46,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:26:46,191 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:26:46,191 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:26:46,193 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 20:26:46,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 20:26:46,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:26:46,196 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-18 20:26:46,199 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:26:46,199 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-18 20:26:46,230 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 20:26:46,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 156 transitions, 330 flow [2022-11-18 20:26:46,312 INFO L130 PetriNetUnfolder]: 40/271 cut-off events. [2022-11-18 20:26:46,312 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-18 20:26:46,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 271 events. 40/271 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 769 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 173. Up to 9 conditions per place. [2022-11-18 20:26:46,316 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 156 transitions, 330 flow [2022-11-18 20:26:46,319 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 156 transitions, 330 flow [2022-11-18 20:26:46,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:26:46,323 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;@5e007ed9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:26:46,323 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 20:26:46,345 INFO L130 PetriNetUnfolder]: 8/109 cut-off events. [2022-11-18 20:26:46,345 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:26:46,346 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:26:46,346 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:46,346 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:26:46,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:46,347 INFO L85 PathProgramCache]: Analyzing trace with hash 449513874, now seen corresponding path program 1 times [2022-11-18 20:26:46,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:46,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387494584] [2022-11-18 20:26:46,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:46,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:46,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:46,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387494584] [2022-11-18 20:26:46,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387494584] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:26:46,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:26:46,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:26:46,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996369143] [2022-11-18 20:26:46,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:26:46,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:26:46,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:46,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:26:46,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:26:46,408 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 156 [2022-11-18 20:26:46,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 156 transitions, 330 flow. Second operand has 2 states, 2 states have (on average 134.5) internal successors, (269), 2 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:46,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:26:46,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 156 [2022-11-18 20:26:46,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:26:46,481 INFO L130 PetriNetUnfolder]: 12/240 cut-off events. [2022-11-18 20:26:46,481 INFO L131 PetriNetUnfolder]: For 21/27 co-relation queries the response was YES. [2022-11-18 20:26:46,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 240 events. 12/240 cut-off events. For 21/27 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 670 event pairs, 0 based on Foata normal form. 42/263 useless extension candidates. Maximal degree in co-relation 157. Up to 7 conditions per place. [2022-11-18 20:26:46,484 INFO L137 encePairwiseOnDemand]: 139/156 looper letters, 2 selfloop transitions, 0 changer transitions 25/138 dead transitions. [2022-11-18 20:26:46,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 138 transitions, 302 flow [2022-11-18 20:26:46,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:26:46,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:26:46,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 289 transitions. [2022-11-18 20:26:46,488 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9262820512820513 [2022-11-18 20:26:46,488 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 289 transitions. [2022-11-18 20:26:46,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 289 transitions. [2022-11-18 20:26:46,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:26:46,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 289 transitions. [2022-11-18 20:26:46,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 144.5) internal successors, (289), 2 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:46,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:46,493 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:46,494 INFO L175 Difference]: Start difference. First operand has 139 places, 156 transitions, 330 flow. Second operand 2 states and 289 transitions. [2022-11-18 20:26:46,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 138 transitions, 302 flow [2022-11-18 20:26:46,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 138 transitions, 302 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:26:46,501 INFO L231 Difference]: Finished difference. Result has 139 places, 113 transitions, 238 flow [2022-11-18 20:26:46,502 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=238, PETRI_PLACES=139, PETRI_TRANSITIONS=113} [2022-11-18 20:26:46,503 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 0 predicate places. [2022-11-18 20:26:46,503 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 113 transitions, 238 flow [2022-11-18 20:26:46,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 134.5) internal successors, (269), 2 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:46,504 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:26:46,504 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:46,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:26:46,505 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:26:46,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:46,506 INFO L85 PathProgramCache]: Analyzing trace with hash 156110867, now seen corresponding path program 1 times [2022-11-18 20:26:46,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:46,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598106098] [2022-11-18 20:26:46,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:46,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:46,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:46,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598106098] [2022-11-18 20:26:46,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598106098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:26:46,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:26:46,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:26:46,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023972469] [2022-11-18 20:26:46,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:26:46,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:26:46,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:46,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:26:46,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:26:46,669 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 156 [2022-11-18 20:26:46,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 113 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:46,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:26:46,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 156 [2022-11-18 20:26:46,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:26:46,726 INFO L130 PetriNetUnfolder]: 2/142 cut-off events. [2022-11-18 20:26:46,727 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:26:46,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 142 events. 2/142 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 232 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 165. Up to 12 conditions per place. [2022-11-18 20:26:46,728 INFO L137 encePairwiseOnDemand]: 153/156 looper letters, 11 selfloop transitions, 2 changer transitions 0/117 dead transitions. [2022-11-18 20:26:46,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 117 transitions, 272 flow [2022-11-18 20:26:46,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:26:46,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:26:46,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2022-11-18 20:26:46,731 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.844017094017094 [2022-11-18 20:26:46,732 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2022-11-18 20:26:46,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2022-11-18 20:26:46,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:26:46,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2022-11-18 20:26:46,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:46,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:46,737 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:46,737 INFO L175 Difference]: Start difference. First operand has 139 places, 113 transitions, 238 flow. Second operand 3 states and 395 transitions. [2022-11-18 20:26:46,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 117 transitions, 272 flow [2022-11-18 20:26:46,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 117 transitions, 270 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-18 20:26:46,742 INFO L231 Difference]: Finished difference. Result has 121 places, 114 transitions, 248 flow [2022-11-18 20:26:46,743 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=121, PETRI_TRANSITIONS=114} [2022-11-18 20:26:46,744 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -18 predicate places. [2022-11-18 20:26:46,744 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 114 transitions, 248 flow [2022-11-18 20:26:46,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:46,745 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:26:46,745 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:46,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:26:46,746 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:26:46,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:46,747 INFO L85 PathProgramCache]: Analyzing trace with hash -412244814, now seen corresponding path program 1 times [2022-11-18 20:26:46,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:46,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247754378] [2022-11-18 20:26:46,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:46,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:46,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:46,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247754378] [2022-11-18 20:26:46,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247754378] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:46,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646700175] [2022-11-18 20:26:46,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:46,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:46,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:46,951 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:46,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:26:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:47,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:26:47,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:47,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:47,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646700175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:47,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:26:47,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 20:26:47,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881598177] [2022-11-18 20:26:47,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:47,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:26:47,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:47,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:26:47,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:26:47,295 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 156 [2022-11-18 20:26:47,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 114 transitions, 248 flow. Second operand has 10 states, 10 states have (on average 128.3) internal successors, (1283), 10 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:47,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:26:47,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 156 [2022-11-18 20:26:47,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:26:47,454 INFO L130 PetriNetUnfolder]: 0/110 cut-off events. [2022-11-18 20:26:47,460 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-18 20:26:47,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 110 events. 0/110 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 2/112 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-11-18 20:26:47,461 INFO L137 encePairwiseOnDemand]: 151/156 looper letters, 9 selfloop transitions, 7 changer transitions 0/104 dead transitions. [2022-11-18 20:26:47,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 104 transitions, 258 flow [2022-11-18 20:26:47,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:26:47,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 20:26:47,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1152 transitions. [2022-11-18 20:26:47,466 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8205128205128205 [2022-11-18 20:26:47,466 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1152 transitions. [2022-11-18 20:26:47,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1152 transitions. [2022-11-18 20:26:47,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:26:47,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1152 transitions. [2022-11-18 20:26:47,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 128.0) internal successors, (1152), 9 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:47,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 156.0) internal successors, (1560), 10 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:47,478 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 156.0) internal successors, (1560), 10 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:47,479 INFO L175 Difference]: Start difference. First operand has 121 places, 114 transitions, 248 flow. Second operand 9 states and 1152 transitions. [2022-11-18 20:26:47,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 104 transitions, 258 flow [2022-11-18 20:26:47,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 104 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:26:47,484 INFO L231 Difference]: Finished difference. Result has 113 places, 100 transitions, 230 flow [2022-11-18 20:26:47,485 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=230, PETRI_PLACES=113, PETRI_TRANSITIONS=100} [2022-11-18 20:26:47,490 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -26 predicate places. [2022-11-18 20:26:47,490 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 100 transitions, 230 flow [2022-11-18 20:26:47,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 128.3) internal successors, (1283), 10 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:47,492 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:26:47,493 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:47,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:26:47,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 20:26:47,707 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:26:47,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:47,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1438768938, now seen corresponding path program 1 times [2022-11-18 20:26:47,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:47,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173038975] [2022-11-18 20:26:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:47,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:26:47,762 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:26:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:26:47,827 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:26:47,828 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:26:47,828 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 20:26:47,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 20:26:47,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 20:26:47,829 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-18 20:26:47,830 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:26:47,830 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-18 20:26:47,859 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 20:26:47,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 186 transitions, 402 flow [2022-11-18 20:26:47,949 INFO L130 PetriNetUnfolder]: 62/404 cut-off events. [2022-11-18 20:26:47,949 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-18 20:26:47,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 404 events. 62/404 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1318 event pairs, 1 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 279. Up to 16 conditions per place. [2022-11-18 20:26:47,955 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 186 transitions, 402 flow [2022-11-18 20:26:47,963 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 186 transitions, 402 flow [2022-11-18 20:26:47,965 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:26:47,972 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;@5e007ed9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:26:47,972 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 20:26:47,990 INFO L130 PetriNetUnfolder]: 8/109 cut-off events. [2022-11-18 20:26:47,996 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:26:47,996 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:26:47,996 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:47,997 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:26:47,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:47,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1312574802, now seen corresponding path program 1 times [2022-11-18 20:26:47,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:48,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297050053] [2022-11-18 20:26:48,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:48,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:48,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:48,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297050053] [2022-11-18 20:26:48,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297050053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:26:48,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:26:48,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:26:48,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288976884] [2022-11-18 20:26:48,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:26:48,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:26:48,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:48,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:26:48,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:26:48,069 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 186 [2022-11-18 20:26:48,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 186 transitions, 402 flow. Second operand has 2 states, 2 states have (on average 156.5) internal successors, (313), 2 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:48,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:26:48,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 186 [2022-11-18 20:26:48,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:26:48,178 INFO L130 PetriNetUnfolder]: 20/358 cut-off events. [2022-11-18 20:26:48,179 INFO L131 PetriNetUnfolder]: For 53/63 co-relation queries the response was YES. [2022-11-18 20:26:48,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 358 events. 20/358 cut-off events. For 53/63 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1204 event pairs, 1 based on Foata normal form. 106/436 useless extension candidates. Maximal degree in co-relation 254. Up to 16 conditions per place. [2022-11-18 20:26:48,182 INFO L137 encePairwiseOnDemand]: 163/186 looper letters, 3 selfloop transitions, 0 changer transitions 26/162 dead transitions. [2022-11-18 20:26:48,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 162 transitions, 366 flow [2022-11-18 20:26:48,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:26:48,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:26:48,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 341 transitions. [2022-11-18 20:26:48,184 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9166666666666666 [2022-11-18 20:26:48,184 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 341 transitions. [2022-11-18 20:26:48,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 341 transitions. [2022-11-18 20:26:48,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:26:48,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 341 transitions. [2022-11-18 20:26:48,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 170.5) internal successors, (341), 2 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:48,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:48,188 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:48,188 INFO L175 Difference]: Start difference. First operand has 164 places, 186 transitions, 402 flow. Second operand 2 states and 341 transitions. [2022-11-18 20:26:48,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 162 transitions, 366 flow [2022-11-18 20:26:48,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 162 transitions, 366 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:26:48,192 INFO L231 Difference]: Finished difference. Result has 164 places, 136 transitions, 293 flow [2022-11-18 20:26:48,193 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=293, PETRI_PLACES=164, PETRI_TRANSITIONS=136} [2022-11-18 20:26:48,194 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 0 predicate places. [2022-11-18 20:26:48,194 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 136 transitions, 293 flow [2022-11-18 20:26:48,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 156.5) internal successors, (313), 2 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:48,194 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:26:48,195 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:48,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 20:26:48,195 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:26:48,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:48,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1019171795, now seen corresponding path program 1 times [2022-11-18 20:26:48,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:48,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089721525] [2022-11-18 20:26:48,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:48,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:48,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:48,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:48,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089721525] [2022-11-18 20:26:48,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089721525] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:26:48,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:26:48,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:26:48,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691320451] [2022-11-18 20:26:48,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:26:48,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:26:48,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:48,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:26:48,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:26:48,289 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 186 [2022-11-18 20:26:48,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 136 transitions, 293 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:48,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:26:48,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 186 [2022-11-18 20:26:48,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:26:48,402 INFO L130 PetriNetUnfolder]: 3/190 cut-off events. [2022-11-18 20:26:48,402 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-18 20:26:48,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 190 events. 3/190 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 403 event pairs, 0 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 224. Up to 18 conditions per place. [2022-11-18 20:26:48,404 INFO L137 encePairwiseOnDemand]: 183/186 looper letters, 12 selfloop transitions, 2 changer transitions 0/140 dead transitions. [2022-11-18 20:26:48,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 140 transitions, 329 flow [2022-11-18 20:26:48,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:26:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:26:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2022-11-18 20:26:48,406 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8279569892473119 [2022-11-18 20:26:48,407 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2022-11-18 20:26:48,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2022-11-18 20:26:48,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:26:48,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2022-11-18 20:26:48,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:48,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:48,411 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:48,411 INFO L175 Difference]: Start difference. First operand has 164 places, 136 transitions, 293 flow. Second operand 3 states and 462 transitions. [2022-11-18 20:26:48,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 140 transitions, 329 flow [2022-11-18 20:26:48,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 140 transitions, 323 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-18 20:26:48,415 INFO L231 Difference]: Finished difference. Result has 146 places, 137 transitions, 299 flow [2022-11-18 20:26:48,416 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=299, PETRI_PLACES=146, PETRI_TRANSITIONS=137} [2022-11-18 20:26:48,417 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, -18 predicate places. [2022-11-18 20:26:48,418 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 137 transitions, 299 flow [2022-11-18 20:26:48,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:48,418 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:26:48,418 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:48,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 20:26:48,420 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:26:48,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:48,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1367327282, now seen corresponding path program 1 times [2022-11-18 20:26:48,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:48,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117209770] [2022-11-18 20:26:48,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:48,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:48,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:48,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117209770] [2022-11-18 20:26:48,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117209770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:48,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952593406] [2022-11-18 20:26:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:48,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:48,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:48,586 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:48,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:26:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:48,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:26:48,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:48,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:48,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952593406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:48,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:26:48,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 20:26:48,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295504040] [2022-11-18 20:26:48,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:48,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:26:48,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:48,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:26:48,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:26:48,881 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 186 [2022-11-18 20:26:48,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 137 transitions, 299 flow. Second operand has 10 states, 10 states have (on average 150.3) internal successors, (1503), 10 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:48,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:26:48,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 186 [2022-11-18 20:26:48,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:26:49,048 INFO L130 PetriNetUnfolder]: 1/158 cut-off events. [2022-11-18 20:26:49,049 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-18 20:26:49,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 158 events. 1/158 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 220 event pairs, 0 based on Foata normal form. 2/159 useless extension candidates. Maximal degree in co-relation 196. Up to 7 conditions per place. [2022-11-18 20:26:49,051 INFO L137 encePairwiseOnDemand]: 180/186 looper letters, 13 selfloop transitions, 9 changer transitions 0/147 dead transitions. [2022-11-18 20:26:49,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 147 transitions, 365 flow [2022-11-18 20:26:49,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:26:49,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 20:26:49,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1356 transitions. [2022-11-18 20:26:49,056 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8100358422939068 [2022-11-18 20:26:49,056 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1356 transitions. [2022-11-18 20:26:49,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1356 transitions. [2022-11-18 20:26:49,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:26:49,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1356 transitions. [2022-11-18 20:26:49,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 150.66666666666666) internal successors, (1356), 9 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:49,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 186.0) internal successors, (1860), 10 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:49,076 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 186.0) internal successors, (1860), 10 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:49,083 INFO L175 Difference]: Start difference. First operand has 146 places, 137 transitions, 299 flow. Second operand 9 states and 1356 transitions. [2022-11-18 20:26:49,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 147 transitions, 365 flow [2022-11-18 20:26:49,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 147 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:26:49,088 INFO L231 Difference]: Finished difference. Result has 156 places, 143 transitions, 347 flow [2022-11-18 20:26:49,089 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=347, PETRI_PLACES=156, PETRI_TRANSITIONS=143} [2022-11-18 20:26:49,089 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, -8 predicate places. [2022-11-18 20:26:49,090 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 143 transitions, 347 flow [2022-11-18 20:26:49,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 150.3) internal successors, (1503), 10 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:49,091 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:26:49,095 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:49,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:26:49,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:26:49,296 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:26:49,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:49,297 INFO L85 PathProgramCache]: Analyzing trace with hash -827131609, now seen corresponding path program 1 times [2022-11-18 20:26:49,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:49,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595068211] [2022-11-18 20:26:49,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:49,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:26:49,325 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:26:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:26:49,355 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:26:49,355 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:26:49,355 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 20:26:49,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 20:26:49,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 20:26:49,356 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-18 20:26:49,357 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:26:49,357 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-18 20:26:49,391 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-18 20:26:49,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 216 transitions, 476 flow [2022-11-18 20:26:49,548 INFO L130 PetriNetUnfolder]: 96/605 cut-off events. [2022-11-18 20:26:49,548 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-18 20:26:49,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 605 events. 96/605 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2266 event pairs, 6 based on Foata normal form. 0/504 useless extension candidates. Maximal degree in co-relation 424. Up to 32 conditions per place. [2022-11-18 20:26:49,555 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 216 transitions, 476 flow [2022-11-18 20:26:49,561 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 216 transitions, 476 flow [2022-11-18 20:26:49,564 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:26:49,565 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;@5e007ed9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:26:49,565 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 20:26:49,577 INFO L130 PetriNetUnfolder]: 8/109 cut-off events. [2022-11-18 20:26:49,577 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:26:49,578 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:26:49,578 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:49,578 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:26:49,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:49,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1425938862, now seen corresponding path program 1 times [2022-11-18 20:26:49,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:49,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693640528] [2022-11-18 20:26:49,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:49,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:49,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:49,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693640528] [2022-11-18 20:26:49,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693640528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:26:49,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:26:49,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:26:49,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997635367] [2022-11-18 20:26:49,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:26:49,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:26:49,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:49,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:26:49,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:26:49,614 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 216 [2022-11-18 20:26:49,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 216 transitions, 476 flow. Second operand has 2 states, 2 states have (on average 178.5) internal successors, (357), 2 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:49,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:26:49,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 216 [2022-11-18 20:26:49,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:26:49,771 INFO L130 PetriNetUnfolder]: 36/540 cut-off events. [2022-11-18 20:26:49,771 INFO L131 PetriNetUnfolder]: For 130/152 co-relation queries the response was YES. [2022-11-18 20:26:49,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 540 events. 36/540 cut-off events. For 130/152 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2148 event pairs, 6 based on Foata normal form. 252/751 useless extension candidates. Maximal degree in co-relation 393. Up to 37 conditions per place. [2022-11-18 20:26:49,778 INFO L137 encePairwiseOnDemand]: 187/216 looper letters, 4 selfloop transitions, 0 changer transitions 27/186 dead transitions. [2022-11-18 20:26:49,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 186 transitions, 432 flow [2022-11-18 20:26:49,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:26:49,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:26:49,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 393 transitions. [2022-11-18 20:26:49,781 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9097222222222222 [2022-11-18 20:26:49,781 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 393 transitions. [2022-11-18 20:26:49,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 393 transitions. [2022-11-18 20:26:49,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:26:49,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 393 transitions. [2022-11-18 20:26:49,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 196.5) internal successors, (393), 2 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:49,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:49,786 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:49,789 INFO L175 Difference]: Start difference. First operand has 189 places, 216 transitions, 476 flow. Second operand 2 states and 393 transitions. [2022-11-18 20:26:49,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 186 transitions, 432 flow [2022-11-18 20:26:49,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 186 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:26:49,796 INFO L231 Difference]: Finished difference. Result has 189 places, 159 transitions, 350 flow [2022-11-18 20:26:49,797 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=350, PETRI_PLACES=189, PETRI_TRANSITIONS=159} [2022-11-18 20:26:49,798 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 0 predicate places. [2022-11-18 20:26:49,799 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 159 transitions, 350 flow [2022-11-18 20:26:49,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 178.5) internal successors, (357), 2 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:49,799 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:26:49,801 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:49,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 20:26:49,802 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:26:49,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:49,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1719341869, now seen corresponding path program 1 times [2022-11-18 20:26:49,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:49,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858508115] [2022-11-18 20:26:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:49,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:49,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:49,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858508115] [2022-11-18 20:26:49,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858508115] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:26:49,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:26:49,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:26:49,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369086326] [2022-11-18 20:26:49,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:26:49,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:26:49,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:49,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:26:49,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:26:49,890 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 216 [2022-11-18 20:26:49,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 159 transitions, 350 flow. Second operand has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:49,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:26:49,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 216 [2022-11-18 20:26:49,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:26:49,966 INFO L130 PetriNetUnfolder]: 4/238 cut-off events. [2022-11-18 20:26:49,966 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-18 20:26:49,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 238 events. 4/238 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 572 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 284. Up to 24 conditions per place. [2022-11-18 20:26:49,969 INFO L137 encePairwiseOnDemand]: 213/216 looper letters, 13 selfloop transitions, 2 changer transitions 0/163 dead transitions. [2022-11-18 20:26:49,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 163 transitions, 388 flow [2022-11-18 20:26:49,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:26:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:26:49,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 529 transitions. [2022-11-18 20:26:49,972 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.816358024691358 [2022-11-18 20:26:49,972 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 529 transitions. [2022-11-18 20:26:49,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 529 transitions. [2022-11-18 20:26:49,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:26:49,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 529 transitions. [2022-11-18 20:26:49,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:49,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:49,977 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:49,977 INFO L175 Difference]: Start difference. First operand has 189 places, 159 transitions, 350 flow. Second operand 3 states and 529 transitions. [2022-11-18 20:26:49,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 163 transitions, 388 flow [2022-11-18 20:26:49,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 163 transitions, 376 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-18 20:26:49,981 INFO L231 Difference]: Finished difference. Result has 171 places, 160 transitions, 350 flow [2022-11-18 20:26:49,982 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=350, PETRI_PLACES=171, PETRI_TRANSITIONS=160} [2022-11-18 20:26:49,983 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, -18 predicate places. [2022-11-18 20:26:49,983 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 160 transitions, 350 flow [2022-11-18 20:26:49,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:49,984 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:26:49,984 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:49,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 20:26:49,985 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:26:49,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:49,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1018016022, now seen corresponding path program 1 times [2022-11-18 20:26:49,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:49,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723729786] [2022-11-18 20:26:49,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:49,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:50,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:50,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:50,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723729786] [2022-11-18 20:26:50,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723729786] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:50,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364164580] [2022-11-18 20:26:50,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:50,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:50,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:50,125 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:50,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:26:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:50,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:26:50,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:50,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:26:50,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364164580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:50,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:26:50,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 20:26:50,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008224881] [2022-11-18 20:26:50,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:50,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:26:50,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:50,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:26:50,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:26:50,453 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 216 [2022-11-18 20:26:50,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 160 transitions, 350 flow. Second operand has 10 states, 10 states have (on average 172.3) internal successors, (1723), 10 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:50,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:26:50,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 216 [2022-11-18 20:26:50,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:26:50,636 INFO L130 PetriNetUnfolder]: 2/206 cut-off events. [2022-11-18 20:26:50,637 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-18 20:26:50,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 206 events. 2/206 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 391 event pairs, 0 based on Foata normal form. 2/206 useless extension candidates. Maximal degree in co-relation 256. Up to 11 conditions per place. [2022-11-18 20:26:50,640 INFO L137 encePairwiseOnDemand]: 210/216 looper letters, 14 selfloop transitions, 9 changer transitions 0/170 dead transitions. [2022-11-18 20:26:50,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 170 transitions, 418 flow [2022-11-18 20:26:50,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:26:50,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 20:26:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1555 transitions. [2022-11-18 20:26:50,646 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7998971193415638 [2022-11-18 20:26:50,646 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1555 transitions. [2022-11-18 20:26:50,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1555 transitions. [2022-11-18 20:26:50,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:26:50,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1555 transitions. [2022-11-18 20:26:50,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 172.77777777777777) internal successors, (1555), 9 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:50,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 216.0) internal successors, (2160), 10 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:50,662 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 216.0) internal successors, (2160), 10 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:50,662 INFO L175 Difference]: Start difference. First operand has 171 places, 160 transitions, 350 flow. Second operand 9 states and 1555 transitions. [2022-11-18 20:26:50,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 170 transitions, 418 flow [2022-11-18 20:26:50,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 170 transitions, 416 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:26:50,669 INFO L231 Difference]: Finished difference. Result has 181 places, 166 transitions, 398 flow [2022-11-18 20:26:50,669 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=398, PETRI_PLACES=181, PETRI_TRANSITIONS=166} [2022-11-18 20:26:50,671 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, -8 predicate places. [2022-11-18 20:26:50,671 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 166 transitions, 398 flow [2022-11-18 20:26:50,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 172.3) internal successors, (1723), 10 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:50,673 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:26:50,673 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:50,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:26:50,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:50,880 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:26:50,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:50,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1938053339, now seen corresponding path program 1 times [2022-11-18 20:26:50,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:50,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540855042] [2022-11-18 20:26:50,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:50,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:50,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 20:26:51,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:51,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540855042] [2022-11-18 20:26:51,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540855042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:26:51,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:26:51,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:26:51,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730128039] [2022-11-18 20:26:51,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:26:51,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:26:51,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:51,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:26:51,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:26:51,179 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 216 [2022-11-18 20:26:51,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 166 transitions, 398 flow. Second operand has 5 states, 5 states have (on average 157.6) internal successors, (788), 5 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:51,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:26:51,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 216 [2022-11-18 20:26:51,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:27:00,186 INFO L130 PetriNetUnfolder]: 16744/41743 cut-off events. [2022-11-18 20:27:00,186 INFO L131 PetriNetUnfolder]: For 475/475 co-relation queries the response was YES. [2022-11-18 20:27:00,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64934 conditions, 41743 events. 16744/41743 cut-off events. For 475/475 co-relation queries the response was YES. Maximal size of possible extension queue 1798. Compared 506316 event pairs, 9176 based on Foata normal form. 750/41813 useless extension candidates. Maximal degree in co-relation 64923. Up to 14189 conditions per place. [2022-11-18 20:27:00,709 INFO L137 encePairwiseOnDemand]: 208/216 looper letters, 31 selfloop transitions, 5 changer transitions 53/230 dead transitions. [2022-11-18 20:27:00,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 230 transitions, 719 flow [2022-11-18 20:27:00,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:27:00,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 20:27:00,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1183 transitions. [2022-11-18 20:27:00,713 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7824074074074074 [2022-11-18 20:27:00,714 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1183 transitions. [2022-11-18 20:27:00,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1183 transitions. [2022-11-18 20:27:00,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:27:00,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1183 transitions. [2022-11-18 20:27:00,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:00,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 216.0) internal successors, (1728), 8 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:00,723 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 216.0) internal successors, (1728), 8 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:00,723 INFO L175 Difference]: Start difference. First operand has 181 places, 166 transitions, 398 flow. Second operand 7 states and 1183 transitions. [2022-11-18 20:27:00,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 230 transitions, 719 flow [2022-11-18 20:27:00,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 230 transitions, 713 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-18 20:27:00,731 INFO L231 Difference]: Finished difference. Result has 191 places, 170 transitions, 449 flow [2022-11-18 20:27:00,732 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=449, PETRI_PLACES=191, PETRI_TRANSITIONS=170} [2022-11-18 20:27:00,734 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 2 predicate places. [2022-11-18 20:27:00,734 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 170 transitions, 449 flow [2022-11-18 20:27:00,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.6) internal successors, (788), 5 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:00,735 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:27:00,736 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:00,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 20:27:00,736 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:27:00,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:00,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1195974897, now seen corresponding path program 1 times [2022-11-18 20:27:00,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:00,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630698574] [2022-11-18 20:27:00,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:00,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:27:00,781 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:27:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:27:00,841 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:27:00,842 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:27:00,842 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 20:27:00,843 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 20:27:00,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 20:27:00,843 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-18 20:27:00,844 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:27:00,845 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-18 20:27:00,899 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-11-18 20:27:00,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 214 places, 246 transitions, 552 flow [2022-11-18 20:27:01,102 INFO L130 PetriNetUnfolder]: 158/946 cut-off events. [2022-11-18 20:27:01,103 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-18 20:27:01,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1057 conditions, 946 events. 158/946 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4162 event pairs, 23 based on Foata normal form. 0/798 useless extension candidates. Maximal degree in co-relation 650. Up to 80 conditions per place. [2022-11-18 20:27:01,120 INFO L82 GeneralOperation]: Start removeDead. Operand has 214 places, 246 transitions, 552 flow [2022-11-18 20:27:01,133 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 214 places, 246 transitions, 552 flow [2022-11-18 20:27:01,134 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:27:01,134 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;@5e007ed9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:27:01,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 20:27:01,143 INFO L130 PetriNetUnfolder]: 8/106 cut-off events. [2022-11-18 20:27:01,144 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:27:01,144 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:27:01,144 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:01,145 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:27:01,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:01,145 INFO L85 PathProgramCache]: Analyzing trace with hash 823907474, now seen corresponding path program 1 times [2022-11-18 20:27:01,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:01,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754273289] [2022-11-18 20:27:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:01,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:01,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:01,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754273289] [2022-11-18 20:27:01,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754273289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:27:01,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:27:01,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:27:01,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461521749] [2022-11-18 20:27:01,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:27:01,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:27:01,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:01,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:27:01,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:27:01,194 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 246 [2022-11-18 20:27:01,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 246 transitions, 552 flow. Second operand has 2 states, 2 states have (on average 200.5) internal successors, (401), 2 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:01,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:27:01,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 246 [2022-11-18 20:27:01,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:27:01,531 INFO L130 PetriNetUnfolder]: 72/854 cut-off events. [2022-11-18 20:27:01,532 INFO L131 PetriNetUnfolder]: For 291/313 co-relation queries the response was YES. [2022-11-18 20:27:01,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1051 conditions, 854 events. 72/854 cut-off events. For 291/313 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4032 event pairs, 23 based on Foata normal form. 580/1372 useless extension candidates. Maximal degree in co-relation 621. Up to 86 conditions per place. [2022-11-18 20:27:01,540 INFO L137 encePairwiseOnDemand]: 211/246 looper letters, 5 selfloop transitions, 0 changer transitions 28/210 dead transitions. [2022-11-18 20:27:01,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 210 transitions, 500 flow [2022-11-18 20:27:01,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:27:01,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:27:01,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 445 transitions. [2022-11-18 20:27:01,543 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9044715447154471 [2022-11-18 20:27:01,544 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 445 transitions. [2022-11-18 20:27:01,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 445 transitions. [2022-11-18 20:27:01,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:27:01,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 445 transitions. [2022-11-18 20:27:01,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 222.5) internal successors, (445), 2 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:01,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:01,549 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:01,549 INFO L175 Difference]: Start difference. First operand has 214 places, 246 transitions, 552 flow. Second operand 2 states and 445 transitions. [2022-11-18 20:27:01,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 210 transitions, 500 flow [2022-11-18 20:27:01,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 210 transitions, 500 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:27:01,556 INFO L231 Difference]: Finished difference. Result has 214 places, 182 transitions, 409 flow [2022-11-18 20:27:01,557 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=409, PETRI_PLACES=214, PETRI_TRANSITIONS=182} [2022-11-18 20:27:01,559 INFO L288 CegarLoopForPetriNet]: 214 programPoint places, 0 predicate places. [2022-11-18 20:27:01,559 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 182 transitions, 409 flow [2022-11-18 20:27:01,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 200.5) internal successors, (401), 2 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:01,560 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:27:01,560 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:01,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-18 20:27:01,561 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:27:01,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:01,561 INFO L85 PathProgramCache]: Analyzing trace with hash 530504467, now seen corresponding path program 1 times [2022-11-18 20:27:01,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:01,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753849885] [2022-11-18 20:27:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:01,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:01,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:01,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753849885] [2022-11-18 20:27:01,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753849885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:27:01,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:27:01,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:27:01,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114118792] [2022-11-18 20:27:01,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:27:01,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:27:01,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:01,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:27:01,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:27:01,637 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 246 [2022-11-18 20:27:01,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 182 transitions, 409 flow. Second operand has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:01,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:27:01,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 246 [2022-11-18 20:27:01,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:27:01,744 INFO L130 PetriNetUnfolder]: 5/286 cut-off events. [2022-11-18 20:27:01,744 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-18 20:27:01,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 286 events. 5/286 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 748 event pairs, 0 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 345. Up to 30 conditions per place. [2022-11-18 20:27:01,748 INFO L137 encePairwiseOnDemand]: 243/246 looper letters, 14 selfloop transitions, 2 changer transitions 0/186 dead transitions. [2022-11-18 20:27:01,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 186 transitions, 449 flow [2022-11-18 20:27:01,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:27:01,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:27:01,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 596 transitions. [2022-11-18 20:27:01,751 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8075880758807588 [2022-11-18 20:27:01,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 596 transitions. [2022-11-18 20:27:01,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 596 transitions. [2022-11-18 20:27:01,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:27:01,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 596 transitions. [2022-11-18 20:27:01,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:01,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:01,758 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:01,758 INFO L175 Difference]: Start difference. First operand has 214 places, 182 transitions, 409 flow. Second operand 3 states and 596 transitions. [2022-11-18 20:27:01,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 186 transitions, 449 flow [2022-11-18 20:27:01,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 186 transitions, 429 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-18 20:27:01,764 INFO L231 Difference]: Finished difference. Result has 196 places, 183 transitions, 401 flow [2022-11-18 20:27:01,765 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=401, PETRI_PLACES=196, PETRI_TRANSITIONS=183} [2022-11-18 20:27:01,765 INFO L288 CegarLoopForPetriNet]: 214 programPoint places, -18 predicate places. [2022-11-18 20:27:01,766 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 183 transitions, 401 flow [2022-11-18 20:27:01,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:01,767 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:27:01,767 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:01,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-18 20:27:01,767 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:27:01,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:01,768 INFO L85 PathProgramCache]: Analyzing trace with hash 635688966, now seen corresponding path program 1 times [2022-11-18 20:27:01,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:01,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49351469] [2022-11-18 20:27:01,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:01,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:01,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:01,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49351469] [2022-11-18 20:27:01,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49351469] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:01,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800915693] [2022-11-18 20:27:01,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:01,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:01,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:01,892 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:01,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:27:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:02,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:27:02,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:02,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:02,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800915693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:02,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:27:02,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 20:27:02,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829656087] [2022-11-18 20:27:02,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:02,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:27:02,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:02,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:27:02,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:27:02,168 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 246 [2022-11-18 20:27:02,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 183 transitions, 401 flow. Second operand has 10 states, 10 states have (on average 194.3) internal successors, (1943), 10 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:02,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:27:02,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 246 [2022-11-18 20:27:02,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:27:02,353 INFO L130 PetriNetUnfolder]: 3/254 cut-off events. [2022-11-18 20:27:02,353 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-18 20:27:02,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 254 events. 3/254 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 563 event pairs, 0 based on Foata normal form. 2/253 useless extension candidates. Maximal degree in co-relation 316. Up to 15 conditions per place. [2022-11-18 20:27:02,357 INFO L137 encePairwiseOnDemand]: 240/246 looper letters, 15 selfloop transitions, 9 changer transitions 0/193 dead transitions. [2022-11-18 20:27:02,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 193 transitions, 471 flow [2022-11-18 20:27:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:27:02,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 20:27:02,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1754 transitions. [2022-11-18 20:27:02,364 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7922312556458898 [2022-11-18 20:27:02,364 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1754 transitions. [2022-11-18 20:27:02,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1754 transitions. [2022-11-18 20:27:02,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:27:02,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1754 transitions. [2022-11-18 20:27:02,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 194.88888888888889) internal successors, (1754), 9 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:02,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 246.0) internal successors, (2460), 10 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:02,379 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 246.0) internal successors, (2460), 10 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:02,380 INFO L175 Difference]: Start difference. First operand has 196 places, 183 transitions, 401 flow. Second operand 9 states and 1754 transitions. [2022-11-18 20:27:02,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 193 transitions, 471 flow [2022-11-18 20:27:02,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 193 transitions, 469 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:27:02,386 INFO L231 Difference]: Finished difference. Result has 206 places, 189 transitions, 449 flow [2022-11-18 20:27:02,387 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=449, PETRI_PLACES=206, PETRI_TRANSITIONS=189} [2022-11-18 20:27:02,388 INFO L288 CegarLoopForPetriNet]: 214 programPoint places, -8 predicate places. [2022-11-18 20:27:02,388 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 189 transitions, 449 flow [2022-11-18 20:27:02,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 194.3) internal successors, (1943), 10 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:02,410 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:27:02,411 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:02,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:02,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626b6d0e-33cc-4132-ace0-00df3f71484c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:02,617 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:27:02,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:02,618 INFO L85 PathProgramCache]: Analyzing trace with hash 603467439, now seen corresponding path program 1 times [2022-11-18 20:27:02,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:02,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011040900] [2022-11-18 20:27:02,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:02,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 20:27:02,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:02,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011040900] [2022-11-18 20:27:02,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011040900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:27:02,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:27:02,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:27:02,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778456042] [2022-11-18 20:27:02,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:27:02,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:27:02,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:02,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:27:02,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:27:02,847 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 246 [2022-11-18 20:27:02,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 189 transitions, 449 flow. Second operand has 5 states, 5 states have (on average 175.6) internal successors, (878), 5 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:02,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:27:02,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 246 [2022-11-18 20:27:02,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand