./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 19:16:03,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:16:03,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:16:03,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:16:03,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:16:03,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:16:03,170 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:16:03,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:16:03,173 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:16:03,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:16:03,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:16:03,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:16:03,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:16:03,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:16:03,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:16:03,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:16:03,180 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:16:03,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:16:03,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:16:03,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:16:03,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:16:03,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:16:03,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:16:03,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:16:03,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:16:03,192 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:16:03,192 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:16:03,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:16:03,194 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:16:03,195 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:16:03,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:16:03,196 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:16:03,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:16:03,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:16:03,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:16:03,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:16:03,199 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:16:03,199 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:16:03,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:16:03,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:16:03,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:16:03,202 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 19:16:03,222 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:16:03,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:16:03,222 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:16:03,222 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:16:03,223 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:16:03,223 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:16:03,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:16:03,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:16:03,224 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:16:03,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:16:03,224 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:16:03,224 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 19:16:03,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:16:03,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:16:03,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:16:03,225 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 19:16:03,225 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 19:16:03,225 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 19:16:03,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:16:03,226 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 19:16:03,226 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:16:03,226 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:16:03,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:16:03,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:16:03,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:16:03,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:16:03,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:16:03,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:16:03,227 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:16:03,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:16:03,227 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:16:03,227 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:16:03,227 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:16:03,227 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:16:03,227 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 [2022-12-13 19:16:03,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:16:03,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:16:03,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:16:03,437 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:16:03,437 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:16:03,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2022-12-13 19:16:06,055 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:16:06,229 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:16:06,229 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2022-12-13 19:16:06,236 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/data/44657ba8a/c70bb0cc8c9f42438d32a4c100269e8c/FLAGf88c485fe [2022-12-13 19:16:06,251 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/data/44657ba8a/c70bb0cc8c9f42438d32a4c100269e8c [2022-12-13 19:16:06,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:16:06,254 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:16:06,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:16:06,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:16:06,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:16:06,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:16:06" (1/1) ... [2022-12-13 19:16:06,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@614ecff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:16:06, skipping insertion in model container [2022-12-13 19:16:06,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:16:06" (1/1) ... [2022-12-13 19:16:06,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:16:06,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:16:06,425 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2022-12-13 19:16:06,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:16:06,445 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-13 19:16:06,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@c0965fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:16:06, skipping insertion in model container [2022-12-13 19:16:06,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:16:06,446 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 19:16:06,447 INFO L158 Benchmark]: Toolchain (without parser) took 192.47ms. Allocated memory is still 117.4MB. Free memory was 88.7MB in the beginning and 78.7MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 19:16:06,448 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 96.5MB. Free memory is still 49.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 19:16:06,448 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.77ms. Allocated memory is still 117.4MB. Free memory was 88.2MB in the beginning and 78.7MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 19:16:06,449 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 96.5MB. Free memory is still 49.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 190.77ms. Allocated memory is still 117.4MB. Free memory was 88.2MB in the beginning and 78.7MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 122]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 19:16:07,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:16:07,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:16:07,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:16:07,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:16:07,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:16:07,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:16:07,833 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:16:07,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:16:07,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:16:07,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:16:07,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:16:07,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:16:07,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:16:07,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:16:07,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:16:07,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:16:07,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:16:07,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:16:07,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:16:07,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:16:07,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:16:07,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:16:07,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:16:07,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:16:07,849 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:16:07,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:16:07,850 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:16:07,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:16:07,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:16:07,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:16:07,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:16:07,852 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:16:07,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:16:07,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:16:07,853 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:16:07,854 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:16:07,854 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:16:07,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:16:07,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:16:07,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:16:07,856 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 19:16:07,881 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:16:07,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:16:07,881 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:16:07,882 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:16:07,882 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:16:07,882 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:16:07,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:16:07,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:16:07,883 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:16:07,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:16:07,884 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:16:07,884 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 19:16:07,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:16:07,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:16:07,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:16:07,884 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 19:16:07,885 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 19:16:07,885 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 19:16:07,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:16:07,885 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 19:16:07,885 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 19:16:07,885 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 19:16:07,885 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:16:07,886 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:16:07,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:16:07,886 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:16:07,886 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:16:07,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:16:07,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:16:07,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:16:07,887 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 19:16:07,887 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 19:16:07,887 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:16:07,887 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:16:07,887 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:16:07,887 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 19:16:07,887 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:16:07,888 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 [2022-12-13 19:16:08,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:16:08,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:16:08,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:16:08,146 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:16:08,147 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:16:08,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2022-12-13 19:16:10,696 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:16:10,840 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:16:10,840 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2022-12-13 19:16:10,846 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/data/3376a59f9/147b415b78d34c55bcfaedf95b8d10f7/FLAG7a3805d78 [2022-12-13 19:16:10,857 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/data/3376a59f9/147b415b78d34c55bcfaedf95b8d10f7 [2022-12-13 19:16:10,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:16:10,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:16:10,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:16:10,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:16:10,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:16:10,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:16:10" (1/1) ... [2022-12-13 19:16:10,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59c2ca27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:16:10, skipping insertion in model container [2022-12-13 19:16:10,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:16:10" (1/1) ... [2022-12-13 19:16:10,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:16:10,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:16:11,032 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2022-12-13 19:16:11,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:16:11,057 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 19:16:11,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:16:11,078 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2022-12-13 19:16:11,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:16:11,085 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:16:11,102 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2022-12-13 19:16:11,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:16:11,118 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:16:11,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:16:11 WrapperNode [2022-12-13 19:16:11,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:16:11,119 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:16:11,119 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:16:11,119 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:16:11,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:16:11" (1/1) ... [2022-12-13 19:16:11,133 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:16:11" (1/1) ... [2022-12-13 19:16:11,153 INFO L138 Inliner]: procedures = 27, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 201 [2022-12-13 19:16:11,154 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:16:11,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:16:11,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:16:11,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:16:11,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:16:11" (1/1) ... [2022-12-13 19:16:11,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:16:11" (1/1) ... [2022-12-13 19:16:11,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:16:11" (1/1) ... [2022-12-13 19:16:11,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:16:11" (1/1) ... [2022-12-13 19:16:11,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:16:11" (1/1) ... [2022-12-13 19:16:11,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:16:11" (1/1) ... [2022-12-13 19:16:11,184 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:16:11" (1/1) ... [2022-12-13 19:16:11,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:16:11" (1/1) ... [2022-12-13 19:16:11,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:16:11,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:16:11,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:16:11,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:16:11,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:16:11" (1/1) ... [2022-12-13 19:16:11,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:16:11,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:16:11,221 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:16:11,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:16:11,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:16:11,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 19:16:11,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:16:11,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 19:16:11,259 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 19:16:11,259 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 19:16:11,259 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 19:16:11,259 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 19:16:11,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 19:16:11,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:16:11,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:16:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:16:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 19:16:11,261 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 19:16:11,359 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:16:11,361 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:16:11,775 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:16:11,784 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:16:11,784 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 19:16:11,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:16:11 BoogieIcfgContainer [2022-12-13 19:16:11,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:16:11,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:16:11,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:16:11,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:16:11,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:16:10" (1/3) ... [2022-12-13 19:16:11,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d0683c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:16:11, skipping insertion in model container [2022-12-13 19:16:11,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:16:11" (2/3) ... [2022-12-13 19:16:11,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d0683c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:16:11, skipping insertion in model container [2022-12-13 19:16:11,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:16:11" (3/3) ... [2022-12-13 19:16:11,795 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2022-12-13 19:16:11,813 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:16:11,813 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-12-13 19:16:11,813 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 19:16:11,892 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 19:16:11,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 278 transitions, 572 flow [2022-12-13 19:16:11,988 INFO L130 PetriNetUnfolder]: 19/276 cut-off events. [2022-12-13 19:16:11,988 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 19:16:11,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 276 events. 19/276 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 561 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 173. Up to 2 conditions per place. [2022-12-13 19:16:11,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 266 places, 278 transitions, 572 flow [2022-12-13 19:16:11,999 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 259 places, 271 transitions, 554 flow [2022-12-13 19:16:12,001 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:16:12,009 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 259 places, 271 transitions, 554 flow [2022-12-13 19:16:12,011 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 259 places, 271 transitions, 554 flow [2022-12-13 19:16:12,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 271 transitions, 554 flow [2022-12-13 19:16:12,053 INFO L130 PetriNetUnfolder]: 19/271 cut-off events. [2022-12-13 19:16:12,053 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 19:16:12,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 271 events. 19/271 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 560 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 173. Up to 2 conditions per place. [2022-12-13 19:16:12,058 INFO L119 LiptonReduction]: Number of co-enabled transitions 13348 [2022-12-13 19:16:30,948 INFO L134 LiptonReduction]: Checked pairs total: 12217 [2022-12-13 19:16:30,948 INFO L136 LiptonReduction]: Total number of compositions: 317 [2022-12-13 19:16:30,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:16:30,968 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@3897353b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:16:30,968 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-12-13 19:16:30,971 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 19:16:30,971 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:16:30,971 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:30,971 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:16:30,972 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:30,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:30,975 INFO L85 PathProgramCache]: Analyzing trace with hash 35946, now seen corresponding path program 1 times [2022-12-13 19:16:30,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:30,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372722280] [2022-12-13 19:16:30,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:16:30,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:30,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:30,985 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:16:30,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-13 19:16:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:16:31,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:16:31,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:31,152 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 19:16:31,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 19:16:31,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:16:31,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:16:31,175 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:31,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372722280] [2022-12-13 19:16:31,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372722280] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:16:31,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:16:31,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:16:31,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542667547] [2022-12-13 19:16:31,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:16:31,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:16:31,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:31,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:16:31,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:16:31,301 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 595 [2022-12-13 19:16:31,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:31,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:31,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 595 [2022-12-13 19:16:31,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:31,498 INFO L130 PetriNetUnfolder]: 217/364 cut-off events. [2022-12-13 19:16:31,498 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 19:16:31,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 364 events. 217/364 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1258 event pairs, 168 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 640. Up to 364 conditions per place. [2022-12-13 19:16:31,502 INFO L137 encePairwiseOnDemand]: 592/595 looper letters, 29 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2022-12-13 19:16:31,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 132 flow [2022-12-13 19:16:31,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:16:31,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:16:31,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 791 transitions. [2022-12-13 19:16:31,518 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44313725490196076 [2022-12-13 19:16:31,518 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 791 transitions. [2022-12-13 19:16:31,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 791 transitions. [2022-12-13 19:16:31,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:31,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 791 transitions. [2022-12-13 19:16:31,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.6666666666667) internal successors, (791), 3 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:31,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 595.0) internal successors, (2380), 4 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:31,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 595.0) internal successors, (2380), 4 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:31,539 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 791 transitions. [2022-12-13 19:16:31,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 132 flow [2022-12-13 19:16:31,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 124 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 19:16:31,544 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 66 flow [2022-12-13 19:16:31,546 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2022-12-13 19:16:31,550 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2022-12-13 19:16:31,550 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 66 flow [2022-12-13 19:16:31,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:31,551 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:31,551 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:16:31,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 19:16:31,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:31,752 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:31,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:31,752 INFO L85 PathProgramCache]: Analyzing trace with hash 36123, now seen corresponding path program 1 times [2022-12-13 19:16:31,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:31,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251959411] [2022-12-13 19:16:31,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:16:31,753 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:31,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:31,754 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:16:31,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-13 19:16:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:16:31,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 19:16:31,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:16:31,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:16:31,805 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:31,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251959411] [2022-12-13 19:16:31,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251959411] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:16:31,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:16:31,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:16:31,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627179569] [2022-12-13 19:16:31,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:16:31,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:16:31,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:31,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:16:31,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:16:31,845 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 595 [2022-12-13 19:16:31,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 255.66666666666666) internal successors, (767), 3 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:31,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:31,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 595 [2022-12-13 19:16:31,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:32,047 INFO L130 PetriNetUnfolder]: 217/366 cut-off events. [2022-12-13 19:16:32,048 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 19:16:32,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 366 events. 217/366 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1270 event pairs, 168 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 736. Up to 365 conditions per place. [2022-12-13 19:16:32,049 INFO L137 encePairwiseOnDemand]: 590/595 looper letters, 30 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2022-12-13 19:16:32,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 134 flow [2022-12-13 19:16:32,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:16:32,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:16:32,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 800 transitions. [2022-12-13 19:16:32,054 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4481792717086835 [2022-12-13 19:16:32,054 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 800 transitions. [2022-12-13 19:16:32,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 800 transitions. [2022-12-13 19:16:32,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:32,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 800 transitions. [2022-12-13 19:16:32,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:32,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 595.0) internal successors, (2380), 4 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:32,060 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 595.0) internal successors, (2380), 4 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:32,060 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 66 flow. Second operand 3 states and 800 transitions. [2022-12-13 19:16:32,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 134 flow [2022-12-13 19:16:32,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 133 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:16:32,061 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 81 flow [2022-12-13 19:16:32,061 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2022-12-13 19:16:32,062 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2022-12-13 19:16:32,062 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 81 flow [2022-12-13 19:16:32,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.66666666666666) internal successors, (767), 3 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:32,062 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:32,062 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:16:32,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-12-13 19:16:32,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:32,264 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:32,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:32,265 INFO L85 PathProgramCache]: Analyzing trace with hash 35947, now seen corresponding path program 1 times [2022-12-13 19:16:32,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:32,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387470049] [2022-12-13 19:16:32,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:16:32,271 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:32,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:32,273 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:16:32,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-13 19:16:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:16:32,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:16:32,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:32,436 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 19:16:32,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 19:16:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:16:32,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:16:32,452 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:32,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387470049] [2022-12-13 19:16:32,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387470049] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:16:32,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:16:32,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:16:32,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724017824] [2022-12-13 19:16:32,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:16:32,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:16:32,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:32,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:16:32,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:16:32,539 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 595 [2022-12-13 19:16:32,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:32,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:32,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 595 [2022-12-13 19:16:32,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:32,733 INFO L130 PetriNetUnfolder]: 217/365 cut-off events. [2022-12-13 19:16:32,733 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 19:16:32,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 365 events. 217/365 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1271 event pairs, 168 based on Foata normal form. 1/149 useless extension candidates. Maximal degree in co-relation 740. Up to 365 conditions per place. [2022-12-13 19:16:32,735 INFO L137 encePairwiseOnDemand]: 592/595 looper letters, 29 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2022-12-13 19:16:32,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 143 flow [2022-12-13 19:16:32,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:16:32,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:16:32,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 788 transitions. [2022-12-13 19:16:32,738 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4414565826330532 [2022-12-13 19:16:32,738 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 788 transitions. [2022-12-13 19:16:32,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 788 transitions. [2022-12-13 19:16:32,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:32,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 788 transitions. [2022-12-13 19:16:32,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 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) [2022-12-13 19:16:32,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 595.0) internal successors, (2380), 4 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:32,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 595.0) internal successors, (2380), 4 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:32,745 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 81 flow. Second operand 3 states and 788 transitions. [2022-12-13 19:16:32,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 143 flow [2022-12-13 19:16:32,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 139 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 19:16:32,747 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 85 flow [2022-12-13 19:16:32,747 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2022-12-13 19:16:32,747 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2022-12-13 19:16:32,748 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 85 flow [2022-12-13 19:16:32,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:32,748 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:32,748 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 19:16:32,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 19:16:32,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:32,949 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:32,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:32,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1118963, now seen corresponding path program 1 times [2022-12-13 19:16:32,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:32,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447965090] [2022-12-13 19:16:32,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:16:32,950 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:32,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:32,952 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:16:32,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-13 19:16:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:16:32,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 19:16:32,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:33,049 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 19:16:33,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 19:16:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:16:33,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:16:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:16:33,186 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:33,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447965090] [2022-12-13 19:16:33,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [447965090] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:16:33,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:16:33,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 19:16:33,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980602920] [2022-12-13 19:16:33,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:16:33,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:16:33,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:33,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:16:33,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:16:33,713 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 595 [2022-12-13 19:16:33,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 85 flow. Second operand has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:33,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:33,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 595 [2022-12-13 19:16:33,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:34,402 INFO L130 PetriNetUnfolder]: 649/1089 cut-off events. [2022-12-13 19:16:34,402 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-12-13 19:16:34,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2219 conditions, 1089 events. 649/1089 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5101 event pairs, 504 based on Foata normal form. 2/440 useless extension candidates. Maximal degree in co-relation 2209. Up to 365 conditions per place. [2022-12-13 19:16:34,406 INFO L137 encePairwiseOnDemand]: 592/595 looper letters, 83 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2022-12-13 19:16:34,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 87 transitions, 395 flow [2022-12-13 19:16:34,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:16:34,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:16:34,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1339 transitions. [2022-12-13 19:16:34,410 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4500840336134454 [2022-12-13 19:16:34,410 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1339 transitions. [2022-12-13 19:16:34,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1339 transitions. [2022-12-13 19:16:34,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:34,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1339 transitions. [2022-12-13 19:16:34,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 267.8) internal successors, (1339), 5 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:34,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:34,418 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:34,418 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 85 flow. Second operand 5 states and 1339 transitions. [2022-12-13 19:16:34,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 87 transitions, 395 flow [2022-12-13 19:16:34,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 87 transitions, 391 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:16:34,421 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 107 flow [2022-12-13 19:16:34,421 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=107, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2022-12-13 19:16:34,421 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2022-12-13 19:16:34,422 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 107 flow [2022-12-13 19:16:34,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:34,422 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:34,423 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 19:16:34,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 19:16:34,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:34,623 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:34,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:34,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1119139, now seen corresponding path program 1 times [2022-12-13 19:16:34,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:34,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20420149] [2022-12-13 19:16:34,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:16:34,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:34,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:34,626 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:16:34,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-13 19:16:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:16:34,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 19:16:34,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:16:34,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:16:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:16:34,745 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:34,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20420149] [2022-12-13 19:16:34,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20420149] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:16:34,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:16:34,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 19:16:34,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015728672] [2022-12-13 19:16:34,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:16:34,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:16:34,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:34,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:16:34,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:16:34,851 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 595 [2022-12-13 19:16:34,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 107 flow. Second operand has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:34,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:34,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 595 [2022-12-13 19:16:34,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:35,103 INFO L130 PetriNetUnfolder]: 217/367 cut-off events. [2022-12-13 19:16:35,103 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 19:16:35,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 367 events. 217/367 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1271 event pairs, 168 based on Foata normal form. 2/153 useless extension candidates. Maximal degree in co-relation 754. Up to 364 conditions per place. [2022-12-13 19:16:35,104 INFO L137 encePairwiseOnDemand]: 589/595 looper letters, 28 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2022-12-13 19:16:35,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 33 transitions, 173 flow [2022-12-13 19:16:35,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:16:35,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:16:35,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1304 transitions. [2022-12-13 19:16:35,107 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43831932773109245 [2022-12-13 19:16:35,107 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1304 transitions. [2022-12-13 19:16:35,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1304 transitions. [2022-12-13 19:16:35,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:35,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1304 transitions. [2022-12-13 19:16:35,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 260.8) internal successors, (1304), 5 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:35,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:35,113 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:35,113 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 107 flow. Second operand 5 states and 1304 transitions. [2022-12-13 19:16:35,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 33 transitions, 173 flow [2022-12-13 19:16:35,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 33 transitions, 163 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 19:16:35,115 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 124 flow [2022-12-13 19:16:35,115 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=45, PETRI_TRANSITIONS=33} [2022-12-13 19:16:35,116 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2022-12-13 19:16:35,116 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 124 flow [2022-12-13 19:16:35,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:35,117 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:35,117 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2022-12-13 19:16:35,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-13 19:16:35,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:35,318 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:35,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:35,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1075470835, now seen corresponding path program 2 times [2022-12-13 19:16:35,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:35,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784876793] [2022-12-13 19:16:35,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:16:35,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:35,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:35,326 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:16:35,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-13 19:16:35,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:16:35,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:16:35,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:16:35,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:16:35,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:16:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:16:35,632 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:35,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784876793] [2022-12-13 19:16:35,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784876793] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:16:35,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:16:35,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 19:16:35,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281236991] [2022-12-13 19:16:35,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:16:35,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:16:35,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:35,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:16:35,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:16:36,009 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 595 [2022-12-13 19:16:36,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 33 transitions, 124 flow. Second operand has 10 states, 10 states have (on average 254.0) internal successors, (2540), 10 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:36,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:36,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 595 [2022-12-13 19:16:36,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:36,280 INFO L130 PetriNetUnfolder]: 216/365 cut-off events. [2022-12-13 19:16:36,280 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 19:16:36,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 767 conditions, 365 events. 216/365 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1260 event pairs, 168 based on Foata normal form. 2/151 useless extension candidates. Maximal degree in co-relation 752. Up to 362 conditions per place. [2022-12-13 19:16:36,283 INFO L137 encePairwiseOnDemand]: 592/595 looper letters, 27 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2022-12-13 19:16:36,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 31 transitions, 169 flow [2022-12-13 19:16:36,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:16:36,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:16:36,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1551 transitions. [2022-12-13 19:16:36,286 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43445378151260505 [2022-12-13 19:16:36,286 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1551 transitions. [2022-12-13 19:16:36,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1551 transitions. [2022-12-13 19:16:36,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:36,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1551 transitions. [2022-12-13 19:16:36,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 258.5) internal successors, (1551), 6 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:36,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 595.0) internal successors, (4165), 7 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:36,291 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 595.0) internal successors, (4165), 7 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:36,291 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 124 flow. Second operand 6 states and 1551 transitions. [2022-12-13 19:16:36,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 31 transitions, 169 flow [2022-12-13 19:16:36,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 31 transitions, 153 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-13 19:16:36,292 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 99 flow [2022-12-13 19:16:36,293 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=99, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2022-12-13 19:16:36,293 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2022-12-13 19:16:36,293 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 99 flow [2022-12-13 19:16:36,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 254.0) internal successors, (2540), 10 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:36,294 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:36,294 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2022-12-13 19:16:36,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 19:16:36,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:36,495 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:36,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:36,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1075471011, now seen corresponding path program 2 times [2022-12-13 19:16:36,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:36,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111742103] [2022-12-13 19:16:36,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:16:36,497 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:36,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:36,499 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:16:36,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-13 19:16:36,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:16:36,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:16:36,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:16:36,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:36,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:16:36,630 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-13 19:16:36,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 24 [2022-12-13 19:16:36,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 19:16:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:16:36,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:16:36,723 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:36,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111742103] [2022-12-13 19:16:36,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111742103] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:16:36,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:16:36,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:16:36,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437458577] [2022-12-13 19:16:36,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:16:36,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:16:36,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:36,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:16:36,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:16:36,867 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 595 [2022-12-13 19:16:36,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:36,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:36,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 595 [2022-12-13 19:16:36,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:37,011 INFO L130 PetriNetUnfolder]: 166/289 cut-off events. [2022-12-13 19:16:37,011 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 19:16:37,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 604 conditions, 289 events. 166/289 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 959 event pairs, 128 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 593. Up to 289 conditions per place. [2022-12-13 19:16:37,014 INFO L137 encePairwiseOnDemand]: 592/595 looper letters, 28 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2022-12-13 19:16:37,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 29 transitions, 147 flow [2022-12-13 19:16:37,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:16:37,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:16:37,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 785 transitions. [2022-12-13 19:16:37,016 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43977591036414565 [2022-12-13 19:16:37,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 785 transitions. [2022-12-13 19:16:37,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 785 transitions. [2022-12-13 19:16:37,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:37,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 785 transitions. [2022-12-13 19:16:37,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:37,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 595.0) internal successors, (2380), 4 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:37,019 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 595.0) internal successors, (2380), 4 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:37,019 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 99 flow. Second operand 3 states and 785 transitions. [2022-12-13 19:16:37,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 29 transitions, 147 flow [2022-12-13 19:16:37,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 29 transitions, 140 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 19:16:37,020 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 84 flow [2022-12-13 19:16:37,020 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2022-12-13 19:16:37,021 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2022-12-13 19:16:37,021 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 84 flow [2022-12-13 19:16:37,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:37,021 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:37,021 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2022-12-13 19:16:37,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-13 19:16:37,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:37,223 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:37,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:37,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1075471010, now seen corresponding path program 1 times [2022-12-13 19:16:37,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:37,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323923239] [2022-12-13 19:16:37,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:16:37,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:37,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:37,228 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:16:37,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-13 19:16:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:16:37,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:16:37,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:37,352 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-13 19:16:37,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2022-12-13 19:16:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:16:37,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:16:37,405 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:37,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323923239] [2022-12-13 19:16:37,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323923239] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:16:37,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:16:37,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:16:37,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206910728] [2022-12-13 19:16:37,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:16:37,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:16:37,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:37,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:16:37,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:16:37,511 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 595 [2022-12-13 19:16:37,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:37,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:37,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 595 [2022-12-13 19:16:37,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:37,632 INFO L130 PetriNetUnfolder]: 116/213 cut-off events. [2022-12-13 19:16:37,633 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 19:16:37,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 213 events. 116/213 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 644 event pairs, 88 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 436. Up to 213 conditions per place. [2022-12-13 19:16:37,633 INFO L137 encePairwiseOnDemand]: 592/595 looper letters, 26 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2022-12-13 19:16:37,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 27 transitions, 128 flow [2022-12-13 19:16:37,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:16:37,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:16:37,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 786 transitions. [2022-12-13 19:16:37,635 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4403361344537815 [2022-12-13 19:16:37,635 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 786 transitions. [2022-12-13 19:16:37,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 786 transitions. [2022-12-13 19:16:37,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:37,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 786 transitions. [2022-12-13 19:16:37,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:37,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 595.0) internal successors, (2380), 4 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:37,638 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 595.0) internal successors, (2380), 4 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:37,638 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 84 flow. Second operand 3 states and 786 transitions. [2022-12-13 19:16:37,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 27 transitions, 128 flow [2022-12-13 19:16:37,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 27 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:16:37,639 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 75 flow [2022-12-13 19:16:37,639 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2022-12-13 19:16:37,640 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2022-12-13 19:16:37,640 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 75 flow [2022-12-13 19:16:37,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:37,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:37,641 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2022-12-13 19:16:37,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-13 19:16:37,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:37,842 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:37,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:37,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1559453473, now seen corresponding path program 1 times [2022-12-13 19:16:37,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:37,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794283998] [2022-12-13 19:16:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:16:37,845 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:37,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:37,848 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:16:37,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-13 19:16:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:16:37,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:16:37,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:37,961 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-13 19:16:37,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2022-12-13 19:16:37,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:16:37,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:16:37,979 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:37,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794283998] [2022-12-13 19:16:37,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794283998] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:16:37,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:16:37,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:16:37,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808234843] [2022-12-13 19:16:37,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:16:37,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:16:37,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:37,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:16:37,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:16:38,059 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 595 [2022-12-13 19:16:38,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:38,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:38,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 595 [2022-12-13 19:16:38,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:38,180 INFO L130 PetriNetUnfolder]: 106/193 cut-off events. [2022-12-13 19:16:38,180 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 19:16:38,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 408 conditions, 193 events. 106/193 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 569 event pairs, 80 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 396. Up to 193 conditions per place. [2022-12-13 19:16:38,182 INFO L137 encePairwiseOnDemand]: 592/595 looper letters, 24 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2022-12-13 19:16:38,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 25 transitions, 121 flow [2022-12-13 19:16:38,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:16:38,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:16:38,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 775 transitions. [2022-12-13 19:16:38,185 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4341736694677871 [2022-12-13 19:16:38,185 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 775 transitions. [2022-12-13 19:16:38,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 775 transitions. [2022-12-13 19:16:38,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:38,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 775 transitions. [2022-12-13 19:16:38,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:38,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 595.0) internal successors, (2380), 4 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:38,190 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 595.0) internal successors, (2380), 4 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:38,190 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 75 flow. Second operand 3 states and 775 transitions. [2022-12-13 19:16:38,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 25 transitions, 121 flow [2022-12-13 19:16:38,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 25 transitions, 120 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:16:38,191 INFO L231 Difference]: Finished difference. Result has 35 places, 25 transitions, 72 flow [2022-12-13 19:16:38,191 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=35, PETRI_TRANSITIONS=25} [2022-12-13 19:16:38,191 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2022-12-13 19:16:38,191 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 25 transitions, 72 flow [2022-12-13 19:16:38,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:38,192 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:38,192 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2022-12-13 19:16:38,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 19:16:38,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:38,393 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:38,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:38,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1559453475, now seen corresponding path program 1 times [2022-12-13 19:16:38,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:38,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103313415] [2022-12-13 19:16:38,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:16:38,396 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:38,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:38,399 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:16:38,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-13 19:16:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:16:38,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:16:38,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:38,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:16:38,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:16:38,538 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 19:16:38,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-12-13 19:16:38,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-13 19:16:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:16:38,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:16:38,574 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:38,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103313415] [2022-12-13 19:16:38,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103313415] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:16:38,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:16:38,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:16:38,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546225707] [2022-12-13 19:16:38,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:16:38,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:16:38,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:38,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:16:38,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:16:38,668 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 595 [2022-12-13 19:16:38,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 25 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:38,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:38,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 595 [2022-12-13 19:16:38,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:38,788 INFO L130 PetriNetUnfolder]: 96/173 cut-off events. [2022-12-13 19:16:38,788 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 19:16:38,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 173 events. 96/173 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 494 event pairs, 72 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 356. Up to 173 conditions per place. [2022-12-13 19:16:38,789 INFO L137 encePairwiseOnDemand]: 592/595 looper letters, 22 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2022-12-13 19:16:38,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 23 transitions, 114 flow [2022-12-13 19:16:38,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:16:38,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:16:38,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 782 transitions. [2022-12-13 19:16:38,792 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2022-12-13 19:16:38,792 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 782 transitions. [2022-12-13 19:16:38,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 782 transitions. [2022-12-13 19:16:38,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:38,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 782 transitions. [2022-12-13 19:16:38,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:38,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 595.0) internal successors, (2380), 4 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:38,795 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 595.0) internal successors, (2380), 4 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:38,795 INFO L175 Difference]: Start difference. First operand has 35 places, 25 transitions, 72 flow. Second operand 3 states and 782 transitions. [2022-12-13 19:16:38,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 23 transitions, 114 flow [2022-12-13 19:16:38,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 23 transitions, 113 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:16:38,796 INFO L231 Difference]: Finished difference. Result has 34 places, 23 transitions, 69 flow [2022-12-13 19:16:38,796 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=34, PETRI_TRANSITIONS=23} [2022-12-13 19:16:38,796 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2022-12-13 19:16:38,797 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 23 transitions, 69 flow [2022-12-13 19:16:38,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:38,797 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:38,797 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2022-12-13 19:16:38,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-13 19:16:38,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:38,998 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:38,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:38,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1098415898, now seen corresponding path program 1 times [2022-12-13 19:16:38,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:38,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235343675] [2022-12-13 19:16:38,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:16:38,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:38,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:38,999 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:16:39,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-13 19:16:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:16:39,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 19:16:39,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:39,085 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 19:16:39,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 19:16:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:16:39,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:16:39,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:39,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235343675] [2022-12-13 19:16:39,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235343675] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:16:39,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:16:39,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:16:39,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761960666] [2022-12-13 19:16:39,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:16:39,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:16:39,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:39,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:16:39,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:16:39,198 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 595 [2022-12-13 19:16:39,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 23 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 248.5) internal successors, (994), 4 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:39,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:39,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 595 [2022-12-13 19:16:39,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:39,302 INFO L130 PetriNetUnfolder]: 65/120 cut-off events. [2022-12-13 19:16:39,302 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 19:16:39,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 120 events. 65/120 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 283 event pairs, 45 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 249. Up to 116 conditions per place. [2022-12-13 19:16:39,302 INFO L137 encePairwiseOnDemand]: 591/595 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2022-12-13 19:16:39,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 21 transitions, 107 flow [2022-12-13 19:16:39,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:16:39,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:16:39,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1009 transitions. [2022-12-13 19:16:39,304 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42394957983193277 [2022-12-13 19:16:39,304 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1009 transitions. [2022-12-13 19:16:39,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1009 transitions. [2022-12-13 19:16:39,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:39,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1009 transitions. [2022-12-13 19:16:39,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 252.25) internal successors, (1009), 4 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:39,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 595.0) internal successors, (2975), 5 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:39,308 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 595.0) internal successors, (2975), 5 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:39,308 INFO L175 Difference]: Start difference. First operand has 34 places, 23 transitions, 69 flow. Second operand 4 states and 1009 transitions. [2022-12-13 19:16:39,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 21 transitions, 107 flow [2022-12-13 19:16:39,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 21 transitions, 106 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:16:39,309 INFO L231 Difference]: Finished difference. Result has 34 places, 21 transitions, 68 flow [2022-12-13 19:16:39,310 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=34, PETRI_TRANSITIONS=21} [2022-12-13 19:16:39,310 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2022-12-13 19:16:39,310 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 21 transitions, 68 flow [2022-12-13 19:16:39,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 248.5) internal successors, (994), 4 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:39,310 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:39,310 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2022-12-13 19:16:39,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-13 19:16:39,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:39,512 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:39,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:39,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1098415896, now seen corresponding path program 1 times [2022-12-13 19:16:39,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:39,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166608272] [2022-12-13 19:16:39,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:16:39,514 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:39,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:39,517 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:16:39,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-13 19:16:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:16:39,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 19:16:39,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:39,653 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 19:16:39,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 19:16:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:16:39,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:16:39,705 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:39,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166608272] [2022-12-13 19:16:39,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166608272] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:16:39,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:16:39,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:16:39,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118283744] [2022-12-13 19:16:39,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:16:39,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:16:39,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:39,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:16:39,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:16:39,879 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 595 [2022-12-13 19:16:39,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 21 transitions, 68 flow. Second operand has 5 states, 5 states have (on average 248.2) internal successors, (1241), 5 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:39,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:39,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 595 [2022-12-13 19:16:39,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:40,067 INFO L130 PetriNetUnfolder]: 101/186 cut-off events. [2022-12-13 19:16:40,067 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-12-13 19:16:40,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 186 events. 101/186 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 581 event pairs, 45 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 384. Up to 116 conditions per place. [2022-12-13 19:16:40,069 INFO L137 encePairwiseOnDemand]: 590/595 looper letters, 30 selfloop transitions, 4 changer transitions 0/34 dead transitions. [2022-12-13 19:16:40,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 34 transitions, 165 flow [2022-12-13 19:16:40,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:16:40,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:16:40,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1268 transitions. [2022-12-13 19:16:40,072 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.426218487394958 [2022-12-13 19:16:40,072 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1268 transitions. [2022-12-13 19:16:40,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1268 transitions. [2022-12-13 19:16:40,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:40,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1268 transitions. [2022-12-13 19:16:40,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 253.6) internal successors, (1268), 5 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:40,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:40,079 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:40,079 INFO L175 Difference]: Start difference. First operand has 34 places, 21 transitions, 68 flow. Second operand 5 states and 1268 transitions. [2022-12-13 19:16:40,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 34 transitions, 165 flow [2022-12-13 19:16:40,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:16:40,081 INFO L231 Difference]: Finished difference. Result has 37 places, 22 transitions, 81 flow [2022-12-13 19:16:40,081 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=81, PETRI_PLACES=37, PETRI_TRANSITIONS=22} [2022-12-13 19:16:40,081 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2022-12-13 19:16:40,081 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 22 transitions, 81 flow [2022-12-13 19:16:40,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 248.2) internal successors, (1241), 5 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:40,082 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:40,082 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-12-13 19:16:40,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-12-13 19:16:40,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:40,283 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:40,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:40,284 INFO L85 PathProgramCache]: Analyzing trace with hash 308846638, now seen corresponding path program 1 times [2022-12-13 19:16:40,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:40,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532692558] [2022-12-13 19:16:40,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:16:40,286 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:40,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:40,288 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:16:40,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-13 19:16:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:16:40,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 19:16:40,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:40,420 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 19:16:40,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 19:16:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:16:40,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:16:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:16:40,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:40,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532692558] [2022-12-13 19:16:40,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532692558] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:16:40,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:16:40,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 19:16:40,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915386530] [2022-12-13 19:16:40,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:16:40,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:16:40,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:40,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:16:40,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:16:42,169 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 595 [2022-12-13 19:16:42,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 22 transitions, 81 flow. Second operand has 10 states, 10 states have (on average 247.4) internal successors, (2474), 10 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:42,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:42,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 595 [2022-12-13 19:16:42,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:42,646 INFO L130 PetriNetUnfolder]: 173/318 cut-off events. [2022-12-13 19:16:42,646 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-12-13 19:16:42,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 318 events. 173/318 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1188 event pairs, 45 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 723. Up to 116 conditions per place. [2022-12-13 19:16:42,647 INFO L137 encePairwiseOnDemand]: 590/595 looper letters, 54 selfloop transitions, 6 changer transitions 0/60 dead transitions. [2022-12-13 19:16:42,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 60 transitions, 290 flow [2022-12-13 19:16:42,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 19:16:42,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 19:16:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1782 transitions. [2022-12-13 19:16:42,650 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4278511404561825 [2022-12-13 19:16:42,650 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1782 transitions. [2022-12-13 19:16:42,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1782 transitions. [2022-12-13 19:16:42,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:42,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1782 transitions. [2022-12-13 19:16:42,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 254.57142857142858) internal successors, (1782), 7 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:42,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 595.0) internal successors, (4760), 8 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:42,655 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 595.0) internal successors, (4760), 8 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:42,655 INFO L175 Difference]: Start difference. First operand has 37 places, 22 transitions, 81 flow. Second operand 7 states and 1782 transitions. [2022-12-13 19:16:42,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 60 transitions, 290 flow [2022-12-13 19:16:42,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 60 transitions, 284 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 19:16:42,656 INFO L231 Difference]: Finished difference. Result has 42 places, 24 transitions, 105 flow [2022-12-13 19:16:42,657 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=105, PETRI_PLACES=42, PETRI_TRANSITIONS=24} [2022-12-13 19:16:42,657 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2022-12-13 19:16:42,657 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 24 transitions, 105 flow [2022-12-13 19:16:42,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 247.4) internal successors, (2474), 10 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:42,657 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:42,657 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:16:42,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-12-13 19:16:42,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:42,859 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:42,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:42,860 INFO L85 PathProgramCache]: Analyzing trace with hash 983576672, now seen corresponding path program 1 times [2022-12-13 19:16:42,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:42,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045375114] [2022-12-13 19:16:42,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:16:42,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:42,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:42,864 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:16:42,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-13 19:16:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:16:42,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 19:16:42,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:43,004 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 19:16:43,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 19:16:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:16:43,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:16:43,068 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:43,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045375114] [2022-12-13 19:16:43,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045375114] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:16:43,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:16:43,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:16:43,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612889080] [2022-12-13 19:16:43,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:16:43,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:16:43,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:43,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:16:43,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:16:43,275 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 595 [2022-12-13 19:16:43,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 24 transitions, 105 flow. Second operand has 5 states, 5 states have (on average 248.6) internal successors, (1243), 5 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:43,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:43,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 595 [2022-12-13 19:16:43,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:43,520 INFO L130 PetriNetUnfolder]: 249/458 cut-off events. [2022-12-13 19:16:43,520 INFO L131 PetriNetUnfolder]: For 296/296 co-relation queries the response was YES. [2022-12-13 19:16:43,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1161 conditions, 458 events. 249/458 cut-off events. For 296/296 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1903 event pairs, 135 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 1143. Up to 314 conditions per place. [2022-12-13 19:16:43,521 INFO L137 encePairwiseOnDemand]: 590/595 looper letters, 34 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2022-12-13 19:16:43,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 241 flow [2022-12-13 19:16:43,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:16:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:16:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1266 transitions. [2022-12-13 19:16:43,523 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42554621848739493 [2022-12-13 19:16:43,524 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1266 transitions. [2022-12-13 19:16:43,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1266 transitions. [2022-12-13 19:16:43,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:43,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1266 transitions. [2022-12-13 19:16:43,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 253.2) internal successors, (1266), 5 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:43,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:43,527 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:43,527 INFO L175 Difference]: Start difference. First operand has 42 places, 24 transitions, 105 flow. Second operand 5 states and 1266 transitions. [2022-12-13 19:16:43,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 241 flow [2022-12-13 19:16:43,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 38 transitions, 226 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 19:16:43,529 INFO L231 Difference]: Finished difference. Result has 44 places, 25 transitions, 112 flow [2022-12-13 19:16:43,529 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=44, PETRI_TRANSITIONS=25} [2022-12-13 19:16:43,530 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 8 predicate places. [2022-12-13 19:16:43,530 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 25 transitions, 112 flow [2022-12-13 19:16:43,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 248.6) internal successors, (1243), 5 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:43,530 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:43,530 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:16:43,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-13 19:16:43,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:43,732 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:43,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:43,733 INFO L85 PathProgramCache]: Analyzing trace with hash 426107930, now seen corresponding path program 1 times [2022-12-13 19:16:43,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:43,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041411953] [2022-12-13 19:16:43,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:16:43,734 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:43,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:43,737 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:16:43,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-13 19:16:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:16:43,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 19:16:43,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:43,874 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 19:16:43,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 19:16:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:16:43,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:16:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:16:44,179 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:44,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041411953] [2022-12-13 19:16:44,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041411953] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:16:44,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:16:44,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 19:16:44,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853814842] [2022-12-13 19:16:44,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:16:44,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:16:44,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:44,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:16:44,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:16:45,585 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 595 [2022-12-13 19:16:45,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 25 transitions, 112 flow. Second operand has 10 states, 10 states have (on average 247.8) internal successors, (2478), 10 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:45,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:45,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 595 [2022-12-13 19:16:45,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:46,116 INFO L130 PetriNetUnfolder]: 401/738 cut-off events. [2022-12-13 19:16:46,116 INFO L131 PetriNetUnfolder]: For 488/488 co-relation queries the response was YES. [2022-12-13 19:16:46,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1973 conditions, 738 events. 401/738 cut-off events. For 488/488 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3510 event pairs, 135 based on Foata normal form. 0/710 useless extension candidates. Maximal degree in co-relation 1954. Up to 314 conditions per place. [2022-12-13 19:16:46,118 INFO L137 encePairwiseOnDemand]: 590/595 looper letters, 60 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2022-12-13 19:16:46,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 66 transitions, 408 flow [2022-12-13 19:16:46,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 19:16:46,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 19:16:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1776 transitions. [2022-12-13 19:16:46,121 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4264105642256903 [2022-12-13 19:16:46,122 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1776 transitions. [2022-12-13 19:16:46,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1776 transitions. [2022-12-13 19:16:46,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:46,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1776 transitions. [2022-12-13 19:16:46,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 253.71428571428572) internal successors, (1776), 7 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:46,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 595.0) internal successors, (4760), 8 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:46,126 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 595.0) internal successors, (4760), 8 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:46,127 INFO L175 Difference]: Start difference. First operand has 44 places, 25 transitions, 112 flow. Second operand 7 states and 1776 transitions. [2022-12-13 19:16:46,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 66 transitions, 408 flow [2022-12-13 19:16:46,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 66 transitions, 402 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 19:16:46,128 INFO L231 Difference]: Finished difference. Result has 49 places, 27 transitions, 136 flow [2022-12-13 19:16:46,128 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=136, PETRI_PLACES=49, PETRI_TRANSITIONS=27} [2022-12-13 19:16:46,128 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 13 predicate places. [2022-12-13 19:16:46,129 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 27 transitions, 136 flow [2022-12-13 19:16:46,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 247.8) internal successors, (2478), 10 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:46,129 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:46,129 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2022-12-13 19:16:46,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-12-13 19:16:46,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:46,330 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:46,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:46,330 INFO L85 PathProgramCache]: Analyzing trace with hash 448909166, now seen corresponding path program 2 times [2022-12-13 19:16:46,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:46,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145150629] [2022-12-13 19:16:46,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:16:46,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:46,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:46,332 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:16:46,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-13 19:16:46,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:16:46,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:16:46,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 19:16:46,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:46,545 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 19:16:46,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 19:16:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:16:46,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:16:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:16:47,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:47,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145150629] [2022-12-13 19:16:47,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145150629] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:16:47,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:16:47,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2022-12-13 19:16:47,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63511902] [2022-12-13 19:16:47,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:16:47,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:16:47,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:47,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:16:47,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:16:49,133 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 595 [2022-12-13 19:16:49,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 27 transitions, 136 flow. Second operand has 12 states, 12 states have (on average 247.5) internal successors, (2970), 12 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:49,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:49,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 595 [2022-12-13 19:16:49,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:49,884 INFO L130 PetriNetUnfolder]: 347/662 cut-off events. [2022-12-13 19:16:49,884 INFO L131 PetriNetUnfolder]: For 750/750 co-relation queries the response was YES. [2022-12-13 19:16:49,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1906 conditions, 662 events. 347/662 cut-off events. For 750/750 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3236 event pairs, 9 based on Foata normal form. 44/706 useless extension candidates. Maximal degree in co-relation 1885. Up to 156 conditions per place. [2022-12-13 19:16:49,886 INFO L137 encePairwiseOnDemand]: 590/595 looper letters, 74 selfloop transitions, 6 changer transitions 0/80 dead transitions. [2022-12-13 19:16:49,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 80 transitions, 522 flow [2022-12-13 19:16:49,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:16:49,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 19:16:49,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2033 transitions. [2022-12-13 19:16:49,889 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42710084033613444 [2022-12-13 19:16:49,890 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2033 transitions. [2022-12-13 19:16:49,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2033 transitions. [2022-12-13 19:16:49,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:49,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2033 transitions. [2022-12-13 19:16:49,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 254.125) internal successors, (2033), 8 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:49,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 595.0) internal successors, (5355), 9 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:49,895 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 595.0) internal successors, (5355), 9 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:49,895 INFO L175 Difference]: Start difference. First operand has 49 places, 27 transitions, 136 flow. Second operand 8 states and 2033 transitions. [2022-12-13 19:16:49,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 80 transitions, 522 flow [2022-12-13 19:16:49,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 80 transitions, 480 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-12-13 19:16:49,897 INFO L231 Difference]: Finished difference. Result has 48 places, 25 transitions, 116 flow [2022-12-13 19:16:49,897 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=116, PETRI_PLACES=48, PETRI_TRANSITIONS=25} [2022-12-13 19:16:49,898 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 12 predicate places. [2022-12-13 19:16:49,898 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 25 transitions, 116 flow [2022-12-13 19:16:49,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 247.5) internal successors, (2970), 12 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:49,898 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:49,899 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:16:49,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-13 19:16:50,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:50,099 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:50,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:50,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1467897050, now seen corresponding path program 2 times [2022-12-13 19:16:50,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:50,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49737063] [2022-12-13 19:16:50,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:16:50,100 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:50,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:50,101 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:16:50,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-13 19:16:50,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:16:50,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:16:50,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 19:16:50,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:50,262 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 19:16:50,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 19:16:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:16:50,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:16:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:16:50,666 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:50,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49737063] [2022-12-13 19:16:50,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49737063] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:16:50,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:16:50,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2022-12-13 19:16:50,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692718306] [2022-12-13 19:16:50,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:16:50,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:16:50,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:50,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:16:50,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:16:52,553 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 595 [2022-12-13 19:16:52,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 25 transitions, 116 flow. Second operand has 12 states, 12 states have (on average 247.83333333333334) internal successors, (2974), 12 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:52,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:52,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 595 [2022-12-13 19:16:52,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:53,216 INFO L130 PetriNetUnfolder]: 288/577 cut-off events. [2022-12-13 19:16:53,216 INFO L131 PetriNetUnfolder]: For 310/310 co-relation queries the response was YES. [2022-12-13 19:16:53,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1511 conditions, 577 events. 288/577 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2753 event pairs, 24 based on Foata normal form. 52/629 useless extension candidates. Maximal degree in co-relation 1493. Up to 126 conditions per place. [2022-12-13 19:16:53,218 INFO L137 encePairwiseOnDemand]: 590/595 looper letters, 58 selfloop transitions, 6 changer transitions 0/64 dead transitions. [2022-12-13 19:16:53,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 64 transitions, 375 flow [2022-12-13 19:16:53,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:16:53,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 19:16:53,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2022 transitions. [2022-12-13 19:16:53,221 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42478991596638654 [2022-12-13 19:16:53,221 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2022 transitions. [2022-12-13 19:16:53,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2022 transitions. [2022-12-13 19:16:53,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:53,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2022 transitions. [2022-12-13 19:16:53,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 252.75) internal successors, (2022), 8 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:53,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 595.0) internal successors, (5355), 9 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:53,226 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 595.0) internal successors, (5355), 9 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:53,226 INFO L175 Difference]: Start difference. First operand has 48 places, 25 transitions, 116 flow. Second operand 8 states and 2022 transitions. [2022-12-13 19:16:53,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 64 transitions, 375 flow [2022-12-13 19:16:53,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 64 transitions, 327 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-12-13 19:16:53,228 INFO L231 Difference]: Finished difference. Result has 44 places, 23 transitions, 94 flow [2022-12-13 19:16:53,228 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=23} [2022-12-13 19:16:53,228 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 8 predicate places. [2022-12-13 19:16:53,228 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 23 transitions, 94 flow [2022-12-13 19:16:53,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 247.83333333333334) internal successors, (2974), 12 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:53,229 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:53,229 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:16:53,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-13 19:16:53,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:53,430 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:53,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:53,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1866790825, now seen corresponding path program 1 times [2022-12-13 19:16:53,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:53,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041875627] [2022-12-13 19:16:53,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:16:53,432 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:53,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:53,435 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:16:53,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-13 19:16:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:16:53,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:16:53,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:53,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:16:53,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:16:53,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:53,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041875627] [2022-12-13 19:16:53,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041875627] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:16:53,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:16:53,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 19:16:53,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177728960] [2022-12-13 19:16:53,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:16:53,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:16:53,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:53,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:16:53,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:16:53,902 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 595 [2022-12-13 19:16:53,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 23 transitions, 94 flow. Second operand has 6 states, 6 states have (on average 235.5) internal successors, (1413), 6 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:53,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:53,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 595 [2022-12-13 19:16:53,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:54,311 INFO L130 PetriNetUnfolder]: 290/588 cut-off events. [2022-12-13 19:16:54,311 INFO L131 PetriNetUnfolder]: For 238/238 co-relation queries the response was YES. [2022-12-13 19:16:54,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1469 conditions, 588 events. 290/588 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2847 event pairs, 218 based on Foata normal form. 5/593 useless extension candidates. Maximal degree in co-relation 1454. Up to 442 conditions per place. [2022-12-13 19:16:54,313 INFO L137 encePairwiseOnDemand]: 589/595 looper letters, 38 selfloop transitions, 3 changer transitions 8/49 dead transitions. [2022-12-13 19:16:54,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 49 transitions, 278 flow [2022-12-13 19:16:54,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:16:54,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:16:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1207 transitions. [2022-12-13 19:16:54,315 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4057142857142857 [2022-12-13 19:16:54,315 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1207 transitions. [2022-12-13 19:16:54,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1207 transitions. [2022-12-13 19:16:54,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:54,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1207 transitions. [2022-12-13 19:16:54,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 241.4) internal successors, (1207), 5 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:54,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:54,319 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:54,319 INFO L175 Difference]: Start difference. First operand has 44 places, 23 transitions, 94 flow. Second operand 5 states and 1207 transitions. [2022-12-13 19:16:54,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 49 transitions, 278 flow [2022-12-13 19:16:54,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 253 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 19:16:54,320 INFO L231 Difference]: Finished difference. Result has 45 places, 24 transitions, 103 flow [2022-12-13 19:16:54,320 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=45, PETRI_TRANSITIONS=24} [2022-12-13 19:16:54,320 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2022-12-13 19:16:54,320 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 24 transitions, 103 flow [2022-12-13 19:16:54,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 235.5) internal successors, (1413), 6 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:54,320 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:54,320 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:16:54,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-13 19:16:54,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:54,522 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:54,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:54,523 INFO L85 PathProgramCache]: Analyzing trace with hash -927375793, now seen corresponding path program 2 times [2022-12-13 19:16:54,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:54,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [384266697] [2022-12-13 19:16:54,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:16:54,524 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:54,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:54,527 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:16:54,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-13 19:16:54,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:16:54,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:16:54,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:16:54,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:16:54,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:16:54,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:54,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [384266697] [2022-12-13 19:16:54,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [384266697] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:16:54,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:16:54,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 19:16:54,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170388837] [2022-12-13 19:16:54,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:16:54,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:16:54,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:54,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:16:54,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:16:54,986 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 595 [2022-12-13 19:16:54,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 24 transitions, 103 flow. Second operand has 6 states, 6 states have (on average 235.5) internal successors, (1413), 6 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:54,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:54,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 595 [2022-12-13 19:16:54,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:55,358 INFO L130 PetriNetUnfolder]: 284/580 cut-off events. [2022-12-13 19:16:55,358 INFO L131 PetriNetUnfolder]: For 341/341 co-relation queries the response was YES. [2022-12-13 19:16:55,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1600 conditions, 580 events. 284/580 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2767 event pairs, 218 based on Foata normal form. 3/583 useless extension candidates. Maximal degree in co-relation 1583. Up to 452 conditions per place. [2022-12-13 19:16:55,360 INFO L137 encePairwiseOnDemand]: 589/595 looper letters, 41 selfloop transitions, 3 changer transitions 6/50 dead transitions. [2022-12-13 19:16:55,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 50 transitions, 304 flow [2022-12-13 19:16:55,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:16:55,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:16:55,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1205 transitions. [2022-12-13 19:16:55,362 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4050420168067227 [2022-12-13 19:16:55,362 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1205 transitions. [2022-12-13 19:16:55,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1205 transitions. [2022-12-13 19:16:55,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:55,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1205 transitions. [2022-12-13 19:16:55,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 241.0) internal successors, (1205), 5 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:55,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:55,366 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:55,366 INFO L175 Difference]: Start difference. First operand has 45 places, 24 transitions, 103 flow. Second operand 5 states and 1205 transitions. [2022-12-13 19:16:55,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 50 transitions, 304 flow [2022-12-13 19:16:55,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 280 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-12-13 19:16:55,368 INFO L231 Difference]: Finished difference. Result has 48 places, 25 transitions, 113 flow [2022-12-13 19:16:55,368 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=48, PETRI_TRANSITIONS=25} [2022-12-13 19:16:55,368 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 12 predicate places. [2022-12-13 19:16:55,368 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 25 transitions, 113 flow [2022-12-13 19:16:55,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 235.5) internal successors, (1413), 6 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:55,368 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:55,368 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:16:55,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-13 19:16:55,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:55,569 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:55,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:55,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1407407409, now seen corresponding path program 3 times [2022-12-13 19:16:55,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:55,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335751133] [2022-12-13 19:16:55,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:16:55,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:55,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:55,575 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:16:55,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-13 19:16:55,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 19:16:55,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:16:55,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:16:55,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:16:55,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:16:55,975 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:55,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335751133] [2022-12-13 19:16:55,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335751133] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:16:55,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:16:55,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 19:16:55,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438776095] [2022-12-13 19:16:55,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:16:55,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:16:55,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:55,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:16:55,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:16:56,225 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 595 [2022-12-13 19:16:56,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 25 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 234.5) internal successors, (1407), 6 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:56,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:56,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 595 [2022-12-13 19:16:56,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:56,568 INFO L130 PetriNetUnfolder]: 294/596 cut-off events. [2022-12-13 19:16:56,568 INFO L131 PetriNetUnfolder]: For 515/515 co-relation queries the response was YES. [2022-12-13 19:16:56,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1818 conditions, 596 events. 294/596 cut-off events. For 515/515 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2844 event pairs, 220 based on Foata normal form. 5/601 useless extension candidates. Maximal degree in co-relation 1799. Up to 446 conditions per place. [2022-12-13 19:16:56,570 INFO L137 encePairwiseOnDemand]: 589/595 looper letters, 37 selfloop transitions, 5 changer transitions 6/48 dead transitions. [2022-12-13 19:16:56,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 48 transitions, 303 flow [2022-12-13 19:16:56,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:16:56,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:16:56,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1201 transitions. [2022-12-13 19:16:56,573 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40369747899159664 [2022-12-13 19:16:56,573 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1201 transitions. [2022-12-13 19:16:56,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1201 transitions. [2022-12-13 19:16:56,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:56,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1201 transitions. [2022-12-13 19:16:56,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 240.2) internal successors, (1201), 5 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:56,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:56,576 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:56,576 INFO L175 Difference]: Start difference. First operand has 48 places, 25 transitions, 113 flow. Second operand 5 states and 1201 transitions. [2022-12-13 19:16:56,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 48 transitions, 303 flow [2022-12-13 19:16:56,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 279 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-12-13 19:16:56,578 INFO L231 Difference]: Finished difference. Result has 51 places, 28 transitions, 142 flow [2022-12-13 19:16:56,578 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=51, PETRI_TRANSITIONS=28} [2022-12-13 19:16:56,578 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 15 predicate places. [2022-12-13 19:16:56,578 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 28 transitions, 142 flow [2022-12-13 19:16:56,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 234.5) internal successors, (1407), 6 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:56,578 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:56,578 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:16:56,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-12-13 19:16:56,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:56,779 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:56,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:56,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1804441617, now seen corresponding path program 4 times [2022-12-13 19:16:56,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:56,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182631743] [2022-12-13 19:16:56,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:16:56,782 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:56,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:56,785 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:16:56,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-13 19:16:57,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:16:57,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:16:57,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:16:57,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:16:57,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:16:57,676 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:57,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182631743] [2022-12-13 19:16:57,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182631743] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:16:57,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:16:57,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 19:16:57,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876401051] [2022-12-13 19:16:57,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:16:57,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:16:57,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:57,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:16:57,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:16:58,614 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 595 [2022-12-13 19:16:58,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 28 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 234.5) internal successors, (1407), 6 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:58,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:58,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 595 [2022-12-13 19:16:58,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:59,447 INFO L130 PetriNetUnfolder]: 286/578 cut-off events. [2022-12-13 19:16:59,447 INFO L131 PetriNetUnfolder]: For 622/622 co-relation queries the response was YES. [2022-12-13 19:16:59,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1825 conditions, 578 events. 286/578 cut-off events. For 622/622 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2726 event pairs, 216 based on Foata normal form. 3/581 useless extension candidates. Maximal degree in co-relation 1804. Up to 454 conditions per place. [2022-12-13 19:16:59,449 INFO L137 encePairwiseOnDemand]: 588/595 looper letters, 36 selfloop transitions, 9 changer transitions 7/52 dead transitions. [2022-12-13 19:16:59,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 52 transitions, 348 flow [2022-12-13 19:16:59,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:16:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:16:59,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1436 transitions. [2022-12-13 19:16:59,454 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40224089635854343 [2022-12-13 19:16:59,454 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1436 transitions. [2022-12-13 19:16:59,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1436 transitions. [2022-12-13 19:16:59,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:59,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1436 transitions. [2022-12-13 19:16:59,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 239.33333333333334) internal successors, (1436), 6 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:59,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 595.0) internal successors, (4165), 7 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:59,458 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 595.0) internal successors, (4165), 7 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:59,458 INFO L175 Difference]: Start difference. First operand has 51 places, 28 transitions, 142 flow. Second operand 6 states and 1436 transitions. [2022-12-13 19:16:59,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 52 transitions, 348 flow [2022-12-13 19:16:59,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 331 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-12-13 19:16:59,460 INFO L231 Difference]: Finished difference. Result has 57 places, 33 transitions, 208 flow [2022-12-13 19:16:59,460 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=208, PETRI_PLACES=57, PETRI_TRANSITIONS=33} [2022-12-13 19:16:59,460 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2022-12-13 19:16:59,460 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 33 transitions, 208 flow [2022-12-13 19:16:59,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 234.5) internal successors, (1407), 6 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:59,461 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:59,461 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:16:59,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-12-13 19:16:59,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:59,661 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:59,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:59,662 INFO L85 PathProgramCache]: Analyzing trace with hash -525026905, now seen corresponding path program 1 times [2022-12-13 19:16:59,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:59,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949758098] [2022-12-13 19:16:59,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:16:59,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:59,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:59,667 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:16:59,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-13 19:16:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:16:59,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:16:59,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:16:59,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:16:59,836 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:59,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949758098] [2022-12-13 19:16:59,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949758098] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:16:59,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:16:59,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 19:16:59,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510450269] [2022-12-13 19:16:59,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:16:59,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:16:59,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:59,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:16:59,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:16:59,948 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 595 [2022-12-13 19:16:59,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 33 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 246.2) internal successors, (1231), 5 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:59,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:59,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 595 [2022-12-13 19:16:59,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:00,264 INFO L130 PetriNetUnfolder]: 296/593 cut-off events. [2022-12-13 19:17:00,264 INFO L131 PetriNetUnfolder]: For 891/891 co-relation queries the response was YES. [2022-12-13 19:17:00,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2028 conditions, 593 events. 296/593 cut-off events. For 891/891 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2829 event pairs, 44 based on Foata normal form. 12/605 useless extension candidates. Maximal degree in co-relation 2004. Up to 380 conditions per place. [2022-12-13 19:17:00,266 INFO L137 encePairwiseOnDemand]: 590/595 looper letters, 46 selfloop transitions, 8 changer transitions 1/55 dead transitions. [2022-12-13 19:17:00,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 55 transitions, 415 flow [2022-12-13 19:17:00,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:17:00,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:17:00,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1253 transitions. [2022-12-13 19:17:00,268 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4211764705882353 [2022-12-13 19:17:00,268 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1253 transitions. [2022-12-13 19:17:00,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1253 transitions. [2022-12-13 19:17:00,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:00,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1253 transitions. [2022-12-13 19:17:00,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 250.6) internal successors, (1253), 5 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:00,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:00,271 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:00,271 INFO L175 Difference]: Start difference. First operand has 57 places, 33 transitions, 208 flow. Second operand 5 states and 1253 transitions. [2022-12-13 19:17:00,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 55 transitions, 415 flow [2022-12-13 19:17:00,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 55 transitions, 389 flow, removed 10 selfloop flow, removed 2 redundant places. [2022-12-13 19:17:00,273 INFO L231 Difference]: Finished difference. Result has 60 places, 35 transitions, 235 flow [2022-12-13 19:17:00,273 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=60, PETRI_TRANSITIONS=35} [2022-12-13 19:17:00,274 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2022-12-13 19:17:00,274 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 35 transitions, 235 flow [2022-12-13 19:17:00,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 246.2) internal successors, (1231), 5 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:00,274 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:00,274 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:17:00,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-13 19:17:00,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:17:00,475 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:17:00,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:00,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1225156741, now seen corresponding path program 1 times [2022-12-13 19:17:00,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:17:00,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136771376] [2022-12-13 19:17:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:17:00,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:17:00,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:17:00,478 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:17:00,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-13 19:17:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:17:00,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:17:00,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:17:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:17:00,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:17:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:17:00,863 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:17:00,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136771376] [2022-12-13 19:17:00,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136771376] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:17:00,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:17:00,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-12-13 19:17:00,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708974062] [2022-12-13 19:17:00,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:17:00,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:17:00,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:17:00,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:17:00,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:17:01,093 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 595 [2022-12-13 19:17:01,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 35 transitions, 235 flow. Second operand has 5 states, 5 states have (on average 245.2) internal successors, (1226), 5 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:01,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:01,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 595 [2022-12-13 19:17:01,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:01,562 INFO L130 PetriNetUnfolder]: 318/633 cut-off events. [2022-12-13 19:17:01,563 INFO L131 PetriNetUnfolder]: For 1304/1304 co-relation queries the response was YES. [2022-12-13 19:17:01,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2230 conditions, 633 events. 318/633 cut-off events. For 1304/1304 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3181 event pairs, 28 based on Foata normal form. 18/651 useless extension candidates. Maximal degree in co-relation 2205. Up to 422 conditions per place. [2022-12-13 19:17:01,565 INFO L137 encePairwiseOnDemand]: 590/595 looper letters, 52 selfloop transitions, 9 changer transitions 1/62 dead transitions. [2022-12-13 19:17:01,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 62 transitions, 476 flow [2022-12-13 19:17:01,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:17:01,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:17:01,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1252 transitions. [2022-12-13 19:17:01,567 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42084033613445376 [2022-12-13 19:17:01,567 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1252 transitions. [2022-12-13 19:17:01,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1252 transitions. [2022-12-13 19:17:01,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:01,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1252 transitions. [2022-12-13 19:17:01,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 250.4) internal successors, (1252), 5 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:01,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:01,571 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:01,571 INFO L175 Difference]: Start difference. First operand has 60 places, 35 transitions, 235 flow. Second operand 5 states and 1252 transitions. [2022-12-13 19:17:01,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 62 transitions, 476 flow [2022-12-13 19:17:01,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 62 transitions, 460 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 19:17:01,573 INFO L231 Difference]: Finished difference. Result has 64 places, 37 transitions, 272 flow [2022-12-13 19:17:01,574 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=272, PETRI_PLACES=64, PETRI_TRANSITIONS=37} [2022-12-13 19:17:01,574 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 28 predicate places. [2022-12-13 19:17:01,574 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 37 transitions, 272 flow [2022-12-13 19:17:01,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 245.2) internal successors, (1226), 5 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:01,574 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:01,574 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:17:01,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-12-13 19:17:01,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:17:01,775 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:17:01,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:01,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1076254653, now seen corresponding path program 2 times [2022-12-13 19:17:01,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:17:01,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913281898] [2022-12-13 19:17:01,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:17:01,777 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:17:01,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:17:01,778 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:17:01,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-13 19:17:01,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:17:01,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:17:01,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:17:01,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:17:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:17:02,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:17:02,048 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:17:02,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913281898] [2022-12-13 19:17:02,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913281898] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:17:02,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:17:02,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 19:17:02,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759787534] [2022-12-13 19:17:02,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:17:02,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:17:02,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:17:02,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:17:02,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:17:02,202 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 595 [2022-12-13 19:17:02,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 37 transitions, 272 flow. Second operand has 5 states, 5 states have (on average 243.2) internal successors, (1216), 5 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:02,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:02,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 595 [2022-12-13 19:17:02,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:02,510 INFO L130 PetriNetUnfolder]: 334/661 cut-off events. [2022-12-13 19:17:02,510 INFO L131 PetriNetUnfolder]: For 2054/2054 co-relation queries the response was YES. [2022-12-13 19:17:02,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2480 conditions, 661 events. 334/661 cut-off events. For 2054/2054 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3139 event pairs, 228 based on Foata normal form. 12/673 useless extension candidates. Maximal degree in co-relation 2453. Up to 508 conditions per place. [2022-12-13 19:17:02,513 INFO L137 encePairwiseOnDemand]: 590/595 looper letters, 44 selfloop transitions, 10 changer transitions 0/54 dead transitions. [2022-12-13 19:17:02,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 54 transitions, 449 flow [2022-12-13 19:17:02,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:17:02,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:17:02,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1238 transitions. [2022-12-13 19:17:02,515 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4161344537815126 [2022-12-13 19:17:02,515 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1238 transitions. [2022-12-13 19:17:02,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1238 transitions. [2022-12-13 19:17:02,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:02,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1238 transitions. [2022-12-13 19:17:02,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 247.6) internal successors, (1238), 5 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:02,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:02,518 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:02,518 INFO L175 Difference]: Start difference. First operand has 64 places, 37 transitions, 272 flow. Second operand 5 states and 1238 transitions. [2022-12-13 19:17:02,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 54 transitions, 449 flow [2022-12-13 19:17:02,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 54 transitions, 434 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 19:17:02,521 INFO L231 Difference]: Finished difference. Result has 67 places, 38 transitions, 293 flow [2022-12-13 19:17:02,521 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=293, PETRI_PLACES=67, PETRI_TRANSITIONS=38} [2022-12-13 19:17:02,521 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 31 predicate places. [2022-12-13 19:17:02,522 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 38 transitions, 293 flow [2022-12-13 19:17:02,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 243.2) internal successors, (1216), 5 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:02,522 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:02,522 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:17:02,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-13 19:17:02,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:17:02,723 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:17:02,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:02,724 INFO L85 PathProgramCache]: Analyzing trace with hash 393316253, now seen corresponding path program 2 times [2022-12-13 19:17:02,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:17:02,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609212466] [2022-12-13 19:17:02,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:17:02,726 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:17:02,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:17:02,729 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:17:02,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-13 19:17:02,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:17:02,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:17:02,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:17:02,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:17:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:17:03,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:17:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:17:03,222 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:17:03,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609212466] [2022-12-13 19:17:03,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609212466] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:17:03,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:17:03,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-12-13 19:17:03,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065332648] [2022-12-13 19:17:03,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:17:03,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:17:03,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:17:03,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:17:03,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:17:03,594 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 595 [2022-12-13 19:17:03,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 38 transitions, 293 flow. Second operand has 5 states, 5 states have (on average 245.2) internal successors, (1226), 5 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:03,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:03,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 595 [2022-12-13 19:17:03,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:04,064 INFO L130 PetriNetUnfolder]: 374/755 cut-off events. [2022-12-13 19:17:04,065 INFO L131 PetriNetUnfolder]: For 2298/2298 co-relation queries the response was YES. [2022-12-13 19:17:04,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2887 conditions, 755 events. 374/755 cut-off events. For 2298/2298 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3854 event pairs, 140 based on Foata normal form. 18/773 useless extension candidates. Maximal degree in co-relation 2859. Up to 608 conditions per place. [2022-12-13 19:17:04,067 INFO L137 encePairwiseOnDemand]: 590/595 looper letters, 50 selfloop transitions, 12 changer transitions 1/63 dead transitions. [2022-12-13 19:17:04,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 63 transitions, 538 flow [2022-12-13 19:17:04,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:17:04,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:17:04,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1249 transitions. [2022-12-13 19:17:04,069 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41983193277310926 [2022-12-13 19:17:04,070 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1249 transitions. [2022-12-13 19:17:04,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1249 transitions. [2022-12-13 19:17:04,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:04,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1249 transitions. [2022-12-13 19:17:04,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 249.8) internal successors, (1249), 5 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:04,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:04,072 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:04,072 INFO L175 Difference]: Start difference. First operand has 67 places, 38 transitions, 293 flow. Second operand 5 states and 1249 transitions. [2022-12-13 19:17:04,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 63 transitions, 538 flow [2022-12-13 19:17:04,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 63 transitions, 514 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-13 19:17:04,076 INFO L231 Difference]: Finished difference. Result has 70 places, 42 transitions, 343 flow [2022-12-13 19:17:04,076 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=70, PETRI_TRANSITIONS=42} [2022-12-13 19:17:04,076 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 34 predicate places. [2022-12-13 19:17:04,076 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 42 transitions, 343 flow [2022-12-13 19:17:04,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 245.2) internal successors, (1226), 5 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:04,077 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:04,077 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:17:04,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-13 19:17:04,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:17:04,278 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:17:04,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:04,279 INFO L85 PathProgramCache]: Analyzing trace with hash -733367503, now seen corresponding path program 3 times [2022-12-13 19:17:04,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:17:04,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973235195] [2022-12-13 19:17:04,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:17:04,281 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:17:04,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:17:04,283 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:17:04,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-13 19:17:04,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 19:17:04,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:17:04,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:17:04,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:17:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:17:04,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:17:04,607 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:17:04,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973235195] [2022-12-13 19:17:04,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973235195] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:17:04,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:17:04,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 19:17:04,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744961070] [2022-12-13 19:17:04,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:17:04,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:17:04,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:17:04,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:17:04,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:17:04,739 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 595 [2022-12-13 19:17:04,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 42 transitions, 343 flow. Second operand has 5 states, 5 states have (on average 243.2) internal successors, (1216), 5 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:04,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:04,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 595 [2022-12-13 19:17:04,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:05,045 INFO L130 PetriNetUnfolder]: 368/725 cut-off events. [2022-12-13 19:17:05,045 INFO L131 PetriNetUnfolder]: For 2548/2548 co-relation queries the response was YES. [2022-12-13 19:17:05,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2959 conditions, 725 events. 368/725 cut-off events. For 2548/2548 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3552 event pairs, 234 based on Foata normal form. 2/727 useless extension candidates. Maximal degree in co-relation 2929. Up to 572 conditions per place. [2022-12-13 19:17:05,048 INFO L137 encePairwiseOnDemand]: 590/595 looper letters, 43 selfloop transitions, 10 changer transitions 2/55 dead transitions. [2022-12-13 19:17:05,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 55 transitions, 500 flow [2022-12-13 19:17:05,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:17:05,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:17:05,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1235 transitions. [2022-12-13 19:17:05,050 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4151260504201681 [2022-12-13 19:17:05,050 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1235 transitions. [2022-12-13 19:17:05,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1235 transitions. [2022-12-13 19:17:05,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:05,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1235 transitions. [2022-12-13 19:17:05,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 247.0) internal successors, (1235), 5 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:05,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:05,053 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:05,053 INFO L175 Difference]: Start difference. First operand has 70 places, 42 transitions, 343 flow. Second operand 5 states and 1235 transitions. [2022-12-13 19:17:05,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 55 transitions, 500 flow [2022-12-13 19:17:05,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 55 transitions, 495 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 19:17:05,057 INFO L231 Difference]: Finished difference. Result has 74 places, 42 transitions, 363 flow [2022-12-13 19:17:05,057 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=363, PETRI_PLACES=74, PETRI_TRANSITIONS=42} [2022-12-13 19:17:05,057 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 38 predicate places. [2022-12-13 19:17:05,057 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 42 transitions, 363 flow [2022-12-13 19:17:05,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 243.2) internal successors, (1216), 5 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:05,058 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:05,058 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:17:05,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-12-13 19:17:05,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:17:05,259 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:17:05,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:05,260 INFO L85 PathProgramCache]: Analyzing trace with hash -2042203803, now seen corresponding path program 3 times [2022-12-13 19:17:05,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:17:05,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491587895] [2022-12-13 19:17:05,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:17:05,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:17:05,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:17:05,264 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:17:05,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-13 19:17:05,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 19:17:05,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:17:05,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:17:05,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:17:05,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:17:05,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:17:05,675 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:17:05,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491587895] [2022-12-13 19:17:05,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491587895] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:17:05,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:17:05,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 19:17:05,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979663502] [2022-12-13 19:17:05,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:17:05,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:17:05,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:17:05,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:17:05,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:17:05,812 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 595 [2022-12-13 19:17:05,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 42 transitions, 363 flow. Second operand has 5 states, 5 states have (on average 243.2) internal successors, (1216), 5 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:05,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:05,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 595 [2022-12-13 19:17:05,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:06,194 INFO L130 PetriNetUnfolder]: 355/710 cut-off events. [2022-12-13 19:17:06,194 INFO L131 PetriNetUnfolder]: For 2671/2671 co-relation queries the response was YES. [2022-12-13 19:17:06,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2918 conditions, 710 events. 355/710 cut-off events. For 2671/2671 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3525 event pairs, 200 based on Foata normal form. 12/722 useless extension candidates. Maximal degree in co-relation 2887. Up to 480 conditions per place. [2022-12-13 19:17:06,197 INFO L137 encePairwiseOnDemand]: 590/595 looper letters, 48 selfloop transitions, 13 changer transitions 1/62 dead transitions. [2022-12-13 19:17:06,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 62 transitions, 559 flow [2022-12-13 19:17:06,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:17:06,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:17:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1242 transitions. [2022-12-13 19:17:06,199 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41747899159663865 [2022-12-13 19:17:06,199 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1242 transitions. [2022-12-13 19:17:06,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1242 transitions. [2022-12-13 19:17:06,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:06,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1242 transitions. [2022-12-13 19:17:06,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 248.4) internal successors, (1242), 5 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:06,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:06,203 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:06,203 INFO L175 Difference]: Start difference. First operand has 74 places, 42 transitions, 363 flow. Second operand 5 states and 1242 transitions. [2022-12-13 19:17:06,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 62 transitions, 559 flow [2022-12-13 19:17:06,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 62 transitions, 537 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 19:17:06,207 INFO L231 Difference]: Finished difference. Result has 75 places, 42 transitions, 371 flow [2022-12-13 19:17:06,207 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=371, PETRI_PLACES=75, PETRI_TRANSITIONS=42} [2022-12-13 19:17:06,207 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 39 predicate places. [2022-12-13 19:17:06,208 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 42 transitions, 371 flow [2022-12-13 19:17:06,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 243.2) internal successors, (1216), 5 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:06,208 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:06,208 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:17:06,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-12-13 19:17:06,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:17:06,409 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:17:06,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:06,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1949652777, now seen corresponding path program 4 times [2022-12-13 19:17:06,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:17:06,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150574767] [2022-12-13 19:17:06,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:17:06,411 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:17:06,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:17:06,414 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:17:06,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-13 19:17:06,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:17:06,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:17:06,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:17:06,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:17:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:17:06,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:17:06,726 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:17:06,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150574767] [2022-12-13 19:17:06,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150574767] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:17:06,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:17:06,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 19:17:06,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618911774] [2022-12-13 19:17:06,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:17:06,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:17:06,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:17:06,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:17:06,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:17:06,840 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 595 [2022-12-13 19:17:06,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 42 transitions, 371 flow. Second operand has 5 states, 5 states have (on average 243.2) internal successors, (1216), 5 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:06,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:06,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 595 [2022-12-13 19:17:06,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:07,132 INFO L130 PetriNetUnfolder]: 330/655 cut-off events. [2022-12-13 19:17:07,132 INFO L131 PetriNetUnfolder]: For 2714/2714 co-relation queries the response was YES. [2022-12-13 19:17:07,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2708 conditions, 655 events. 330/655 cut-off events. For 2714/2714 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3130 event pairs, 203 based on Foata normal form. 18/673 useless extension candidates. Maximal degree in co-relation 2676. Up to 537 conditions per place. [2022-12-13 19:17:07,135 INFO L137 encePairwiseOnDemand]: 590/595 looper letters, 44 selfloop transitions, 13 changer transitions 1/58 dead transitions. [2022-12-13 19:17:07,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 58 transitions, 555 flow [2022-12-13 19:17:07,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:17:07,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:17:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1238 transitions. [2022-12-13 19:17:07,137 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4161344537815126 [2022-12-13 19:17:07,137 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1238 transitions. [2022-12-13 19:17:07,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1238 transitions. [2022-12-13 19:17:07,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:07,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1238 transitions. [2022-12-13 19:17:07,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 247.6) internal successors, (1238), 5 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:07,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:07,139 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:07,139 INFO L175 Difference]: Start difference. First operand has 75 places, 42 transitions, 371 flow. Second operand 5 states and 1238 transitions. [2022-12-13 19:17:07,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 58 transitions, 555 flow [2022-12-13 19:17:07,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 58 transitions, 521 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-12-13 19:17:07,143 INFO L231 Difference]: Finished difference. Result has 74 places, 42 transitions, 362 flow [2022-12-13 19:17:07,143 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=74, PETRI_TRANSITIONS=42} [2022-12-13 19:17:07,143 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 38 predicate places. [2022-12-13 19:17:07,143 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 42 transitions, 362 flow [2022-12-13 19:17:07,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 243.2) internal successors, (1216), 5 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:07,143 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:07,143 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:17:07,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-12-13 19:17:07,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:17:07,345 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:17:07,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:07,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1247544267, now seen corresponding path program 4 times [2022-12-13 19:17:07,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:17:07,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217214468] [2022-12-13 19:17:07,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:17:07,347 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:17:07,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:17:07,350 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:17:07,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-12-13 19:17:07,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:17:07,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:17:07,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:17:07,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:17:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:17:07,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:17:07,553 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:17:07,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217214468] [2022-12-13 19:17:07,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217214468] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:17:07,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:17:07,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 19:17:07,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284044851] [2022-12-13 19:17:07,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:17:07,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:17:07,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:17:07,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:17:07,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:17:07,758 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 595 [2022-12-13 19:17:07,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 42 transitions, 362 flow. Second operand has 5 states, 5 states have (on average 243.2) internal successors, (1216), 5 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:07,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:07,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 595 [2022-12-13 19:17:07,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:08,064 INFO L130 PetriNetUnfolder]: 311/604 cut-off events. [2022-12-13 19:17:08,064 INFO L131 PetriNetUnfolder]: For 2054/2054 co-relation queries the response was YES. [2022-12-13 19:17:08,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2506 conditions, 604 events. 311/604 cut-off events. For 2054/2054 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2733 event pairs, 187 based on Foata normal form. 4/608 useless extension candidates. Maximal degree in co-relation 2476. Up to 489 conditions per place. [2022-12-13 19:17:08,066 INFO L137 encePairwiseOnDemand]: 590/595 looper letters, 35 selfloop transitions, 12 changer transitions 4/51 dead transitions. [2022-12-13 19:17:08,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 51 transitions, 485 flow [2022-12-13 19:17:08,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:17:08,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:17:08,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1232 transitions. [2022-12-13 19:17:08,068 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41411764705882353 [2022-12-13 19:17:08,068 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1232 transitions. [2022-12-13 19:17:08,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1232 transitions. [2022-12-13 19:17:08,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:08,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1232 transitions. [2022-12-13 19:17:08,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 246.4) internal successors, (1232), 5 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:08,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:08,071 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 595.0) internal successors, (3570), 6 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:08,071 INFO L175 Difference]: Start difference. First operand has 74 places, 42 transitions, 362 flow. Second operand 5 states and 1232 transitions. [2022-12-13 19:17:08,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 51 transitions, 485 flow [2022-12-13 19:17:08,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 51 transitions, 439 flow, removed 4 selfloop flow, removed 7 redundant places. [2022-12-13 19:17:08,074 INFO L231 Difference]: Finished difference. Result has 70 places, 40 transitions, 321 flow [2022-12-13 19:17:08,074 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=321, PETRI_PLACES=70, PETRI_TRANSITIONS=40} [2022-12-13 19:17:08,075 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 34 predicate places. [2022-12-13 19:17:08,075 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 40 transitions, 321 flow [2022-12-13 19:17:08,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 243.2) internal successors, (1216), 5 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:08,075 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:08,075 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:17:08,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-12-13 19:17:08,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:17:08,276 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:17:08,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:08,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1731933463, now seen corresponding path program 1 times [2022-12-13 19:17:08,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:17:08,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626810189] [2022-12-13 19:17:08,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:17:08,279 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:17:08,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:17:08,282 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:17:08,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-12-13 19:17:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:17:08,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 19:17:08,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:17:08,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:17:08,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 386 treesize of output 144 [2022-12-13 19:17:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:17:12,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:17:15,973 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-13 19:17:15,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 736 treesize of output 342 [2022-12-13 19:22:37,114 WARN L233 SmtUtils]: Spent 5.25m on a formula simplification. DAG size of input: 410 DAG size of output: 95 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 19:22:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:22:37,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:22:37,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626810189] [2022-12-13 19:22:37,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626810189] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:22:37,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:22:37,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-12-13 19:22:37,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150611181] [2022-12-13 19:22:37,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:22:37,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 19:22:37,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:22:37,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 19:22:37,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-12-13 19:22:43,563 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 595 [2022-12-13 19:22:43,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 40 transitions, 321 flow. Second operand has 14 states, 14 states have (on average 216.07142857142858) internal successors, (3025), 14 states have internal predecessors, (3025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:22:43,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:22:43,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 595 [2022-12-13 19:22:43,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:22:55,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:23:00,164 INFO L130 PetriNetUnfolder]: 375/733 cut-off events. [2022-12-13 19:23:00,165 INFO L131 PetriNetUnfolder]: For 1923/1923 co-relation queries the response was YES. [2022-12-13 19:23:00,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2870 conditions, 733 events. 375/733 cut-off events. For 1923/1923 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3709 event pairs, 50 based on Foata normal form. 5/738 useless extension candidates. Maximal degree in co-relation 2843. Up to 287 conditions per place. [2022-12-13 19:23:00,169 INFO L137 encePairwiseOnDemand]: 588/595 looper letters, 67 selfloop transitions, 15 changer transitions 11/93 dead transitions. [2022-12-13 19:23:00,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 812 flow [2022-12-13 19:23:00,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:23:00,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 19:23:00,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1771 transitions. [2022-12-13 19:23:00,172 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3720588235294118 [2022-12-13 19:23:00,172 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1771 transitions. [2022-12-13 19:23:00,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1771 transitions. [2022-12-13 19:23:00,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:23:00,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1771 transitions. [2022-12-13 19:23:00,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 221.375) internal successors, (1771), 8 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:23:00,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 595.0) internal successors, (5355), 9 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:23:00,176 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 595.0) internal successors, (5355), 9 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:23:00,177 INFO L175 Difference]: Start difference. First operand has 70 places, 40 transitions, 321 flow. Second operand 8 states and 1771 transitions. [2022-12-13 19:23:00,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 812 flow [2022-12-13 19:23:00,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 93 transitions, 751 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 19:23:00,180 INFO L231 Difference]: Finished difference. Result has 74 places, 45 transitions, 368 flow [2022-12-13 19:23:00,180 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=368, PETRI_PLACES=74, PETRI_TRANSITIONS=45} [2022-12-13 19:23:00,180 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 38 predicate places. [2022-12-13 19:23:00,180 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 45 transitions, 368 flow [2022-12-13 19:23:00,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 216.07142857142858) internal successors, (3025), 14 states have internal predecessors, (3025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:23:00,181 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:23:00,181 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:23:00,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-12-13 19:23:00,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:23:00,382 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:23:00,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:23:00,382 INFO L85 PathProgramCache]: Analyzing trace with hash -204953803, now seen corresponding path program 2 times [2022-12-13 19:23:00,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:23:00,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1564127298] [2022-12-13 19:23:00,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:23:00,383 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:23:00,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:23:00,384 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 19:23:00,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5acdb6b-8bd7-40c1-a6fe-f1d82ffb6a22/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-12-13 19:23:00,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:23:00,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:23:00,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 19:23:00,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:23:01,123 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:23:01,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 635 treesize of output 239 [2022-12-13 19:23:08,693 WARN L233 SmtUtils]: Spent 7.47s on a formula simplification. DAG size of input: 42 DAG size of output: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 19:23:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:23:13,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:23:18,561 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-13 19:23:18,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 689 treesize of output 339 [2022-12-13 19:27:54,898 WARN L233 SmtUtils]: Spent 4.51m on a formula simplification. DAG size of input: 392 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 19:27:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 19:27:54,904 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:27:54,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1564127298] [2022-12-13 19:27:54,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1564127298] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:27:54,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:27:54,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-12-13 19:27:54,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956373353] [2022-12-13 19:27:54,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:27:54,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 19:27:54,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:27:54,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 19:27:54,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-12-13 19:28:01,575 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 595 [2022-12-13 19:28:01,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 45 transitions, 368 flow. Second operand has 14 states, 14 states have (on average 215.92857142857142) internal successors, (3023), 14 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:28:01,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:28:01,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 595 [2022-12-13 19:28:01,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:30:24,053 WARN L233 SmtUtils]: Spent 2.36m on a formula simplification. DAG size of input: 131 DAG size of output: 107 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)