./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-memsafety/list1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-memsafety/list1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R --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 1da30149a66945688e686f90b0d1749d09e30bdcfdeae7b4325d99ddbe3a8206 --- 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-38b53e6 [2022-11-25 17:18:35,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:18:35,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:18:35,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:18:35,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:18:35,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:18:35,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:18:35,231 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:18:35,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:18:35,235 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:18:35,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:18:35,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:18:35,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:18:35,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:18:35,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:18:35,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:18:35,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:18:35,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:18:35,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:18:35,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:18:35,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:18:35,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:18:35,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:18:35,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:18:35,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:18:35,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:18:35,284 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:18:35,285 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:18:35,286 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:18:35,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:18:35,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:18:35,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:18:35,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:18:35,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:18:35,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:18:35,295 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:18:35,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:18:35,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:18:35,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:18:35,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:18:35,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:18:35,301 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:18:35,336 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:18:35,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:18:35,337 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:18:35,337 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:18:35,338 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:18:35,338 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:18:35,339 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:18:35,339 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:18:35,340 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:18:35,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:18:35,341 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:18:35,341 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:18:35,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:18:35,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:18:35,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:18:35,342 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:18:35,342 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:18:35,343 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:18:35,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:18:35,343 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:18:35,343 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:18:35,343 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:18:35,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:18:35,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:18:35,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:18:35,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:18:35,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:18:35,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:18:35,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:18:35,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:18:35,345 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:18:35,346 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:18:35,346 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:18:35,346 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_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1da30149a66945688e686f90b0d1749d09e30bdcfdeae7b4325d99ddbe3a8206 [2022-11-25 17:18:35,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:18:35,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:18:35,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:18:35,640 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:18:35,640 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:18:35,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-memsafety/list1.i [2022-11-25 17:18:38,706 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:18:39,044 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:18:39,044 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/sv-benchmarks/c/pthread-memsafety/list1.i [2022-11-25 17:18:39,071 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/data/79b9caf8e/e3d0f57daaa645718196b0c944331dc3/FLAG063d5c66a [2022-11-25 17:18:39,090 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/data/79b9caf8e/e3d0f57daaa645718196b0c944331dc3 [2022-11-25 17:18:39,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:18:39,097 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:18:39,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:18:39,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:18:39,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:18:39,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:18:39" (1/1) ... [2022-11-25 17:18:39,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ac3c70c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:39, skipping insertion in model container [2022-11-25 17:18:39,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:18:39" (1/1) ... [2022-11-25 17:18:39,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:18:39,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:18:39,748 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:18:39,758 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) [2022-11-25 17:18:39,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4d75f414 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:39, skipping insertion in model container [2022-11-25 17:18:39,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:18:39,760 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 17:18:39,762 INFO L158 Benchmark]: Toolchain (without parser) took 663.63ms. Allocated memory is still 209.7MB. Free memory was 175.5MB in the beginning and 161.4MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-25 17:18:39,762 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 138.4MB. Free memory is still 81.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:18:39,763 INFO L158 Benchmark]: CACSL2BoogieTranslator took 660.89ms. Allocated memory is still 209.7MB. Free memory was 174.7MB in the beginning and 161.4MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-25 17:18:39,764 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 138.4MB. Free memory is still 81.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 660.89ms. Allocated memory is still 209.7MB. Free memory was 174.7MB in the beginning and 161.4MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1048]: 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_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-memsafety/list1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R --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 1da30149a66945688e686f90b0d1749d09e30bdcfdeae7b4325d99ddbe3a8206 --- 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-38b53e6 [2022-11-25 17:18:42,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:18:42,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:18:42,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:18:42,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:18:42,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:18:42,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:18:42,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:18:42,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:18:42,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:18:42,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:18:42,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:18:42,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:18:42,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:18:42,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:18:42,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:18:42,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:18:42,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:18:42,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:18:42,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:18:42,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:18:42,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:18:42,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:18:42,216 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:18:42,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:18:42,224 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:18:42,224 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:18:42,226 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:18:42,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:18:42,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:18:42,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:18:42,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:18:42,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:18:42,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:18:42,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:18:42,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:18:42,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:18:42,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:18:42,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:18:42,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:18:42,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:18:42,256 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 17:18:42,298 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:18:42,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:18:42,300 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:18:42,300 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:18:42,301 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:18:42,301 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:18:42,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:18:42,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:18:42,303 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:18:42,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:18:42,304 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:18:42,304 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:18:42,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:18:42,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:18:42,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:18:42,305 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:18:42,305 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:18:42,306 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:18:42,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:18:42,306 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:18:42,306 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 17:18:42,307 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 17:18:42,307 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:18:42,307 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:18:42,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:18:42,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:18:42,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:18:42,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:18:42,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:18:42,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:18:42,309 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 17:18:42,309 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 17:18:42,309 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:18:42,310 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:18:42,310 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:18:42,310 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 17:18:42,310 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_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1da30149a66945688e686f90b0d1749d09e30bdcfdeae7b4325d99ddbe3a8206 [2022-11-25 17:18:42,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:18:42,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:18:42,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:18:42,788 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:18:42,789 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:18:42,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-memsafety/list1.i [2022-11-25 17:18:45,817 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:18:46,237 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:18:46,243 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/sv-benchmarks/c/pthread-memsafety/list1.i [2022-11-25 17:18:46,268 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/data/d78b4d301/3dff76c5d82a4d62a43cc35d44ad2b74/FLAG5f5db3094 [2022-11-25 17:18:46,291 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/data/d78b4d301/3dff76c5d82a4d62a43cc35d44ad2b74 [2022-11-25 17:18:46,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:18:46,295 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:18:46,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:18:46,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:18:46,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:18:46,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:18:46" (1/1) ... [2022-11-25 17:18:46,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29f9aa48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:46, skipping insertion in model container [2022-11-25 17:18:46,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:18:46" (1/1) ... [2022-11-25 17:18:46,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:18:46,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:18:46,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:18:46,987 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 17:18:47,003 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:18:47,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:18:47,094 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:18:47,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:18:47,214 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:18:47,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:47 WrapperNode [2022-11-25 17:18:47,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:18:47,216 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:18:47,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:18:47,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:18:47,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:47" (1/1) ... [2022-11-25 17:18:47,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:47" (1/1) ... [2022-11-25 17:18:47,281 INFO L138 Inliner]: procedures = 267, calls = 33, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 74 [2022-11-25 17:18:47,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:18:47,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:18:47,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:18:47,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:18:47,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:47" (1/1) ... [2022-11-25 17:18:47,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:47" (1/1) ... [2022-11-25 17:18:47,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:47" (1/1) ... [2022-11-25 17:18:47,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:47" (1/1) ... [2022-11-25 17:18:47,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:47" (1/1) ... [2022-11-25 17:18:47,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:47" (1/1) ... [2022-11-25 17:18:47,314 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:47" (1/1) ... [2022-11-25 17:18:47,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:47" (1/1) ... [2022-11-25 17:18:47,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:18:47,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:18:47,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:18:47,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:18:47,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:47" (1/1) ... [2022-11-25 17:18:47,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:18:47,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:47,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:18:47,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:18:47,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 17:18:47,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:18:47,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 17:18:47,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 17:18:47,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:18:47,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 17:18:47,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:18:47,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 17:18:47,402 INFO L130 BoogieDeclarations]: Found specification of procedure delete [2022-11-25 17:18:47,402 INFO L138 BoogieDeclarations]: Found implementation of procedure delete [2022-11-25 17:18:47,402 INFO L130 BoogieDeclarations]: Found specification of procedure build [2022-11-25 17:18:47,402 INFO L138 BoogieDeclarations]: Found implementation of procedure build [2022-11-25 17:18:47,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:18:47,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:18:47,404 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:18:47,617 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:18:47,619 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:18:48,153 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:18:48,161 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:18:48,161 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 17:18:48,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:18:48 BoogieIcfgContainer [2022-11-25 17:18:48,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:18:48,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:18:48,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:18:48,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:18:48,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:18:46" (1/3) ... [2022-11-25 17:18:48,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@118b4767 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:18:48, skipping insertion in model container [2022-11-25 17:18:48,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:47" (2/3) ... [2022-11-25 17:18:48,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@118b4767 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:18:48, skipping insertion in model container [2022-11-25 17:18:48,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:18:48" (3/3) ... [2022-11-25 17:18:48,181 INFO L112 eAbstractionObserver]: Analyzing ICFG list1.i [2022-11-25 17:18:48,200 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:18:48,201 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2022-11-25 17:18:48,201 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:18:48,416 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:18:48,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 151 transitions, 318 flow [2022-11-25 17:18:48,552 INFO L130 PetriNetUnfolder]: 6/149 cut-off events. [2022-11-25 17:18:48,552 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:18:48,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 149 events. 6/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 374 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 87. Up to 3 conditions per place. [2022-11-25 17:18:48,558 INFO L82 GeneralOperation]: Start removeDead. Operand has 152 places, 151 transitions, 318 flow [2022-11-25 17:18:48,567 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 144 transitions, 300 flow [2022-11-25 17:18:48,571 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:18:48,591 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 144 transitions, 300 flow [2022-11-25 17:18:48,595 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 144 transitions, 300 flow [2022-11-25 17:18:48,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 144 transitions, 300 flow [2022-11-25 17:18:48,650 INFO L130 PetriNetUnfolder]: 6/144 cut-off events. [2022-11-25 17:18:48,655 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:18:48,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 144 events. 6/144 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 375 event pairs, 0 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 87. Up to 3 conditions per place. [2022-11-25 17:18:48,659 INFO L119 LiptonReduction]: Number of co-enabled transitions 960 [2022-11-25 17:19:24,320 INFO L134 LiptonReduction]: Checked pairs total: 1608 [2022-11-25 17:19:24,320 INFO L136 LiptonReduction]: Total number of compositions: 193 [2022-11-25 17:19:24,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:19:24,341 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;@5fbbce15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:19:24,342 INFO L358 AbstractCegarLoop]: Starting to check reachability of 69 error locations. [2022-11-25 17:19:24,343 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 17:19:24,343 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:19:24,344 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:24,344 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 17:19:24,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:19:24,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:24,350 INFO L85 PathProgramCache]: Analyzing trace with hash 639, now seen corresponding path program 1 times [2022-11-25 17:19:24,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:24,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770134693] [2022-11-25 17:19:24,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:24,363 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 [2022-11-25 17:19:24,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:24,368 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 17:19:24,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:24,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 17:19:24,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:24,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:24,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:19:24,463 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:24,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770134693] [2022-11-25 17:19:24,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770134693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:24,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:24,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 17:19:24,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671951426] [2022-11-25 17:19:24,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:24,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:19:24,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:24,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:19:24,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:19:24,525 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 344 [2022-11-25 17:19:24,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 132 flow. Second operand has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:24,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:24,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 344 [2022-11-25 17:19:24,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:24,862 INFO L130 PetriNetUnfolder]: 100/235 cut-off events. [2022-11-25 17:19:24,863 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:19:24,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 235 events. 100/235 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 966 event pairs, 84 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 261. Up to 228 conditions per place. [2022-11-25 17:19:24,866 INFO L137 encePairwiseOnDemand]: 333/344 looper letters, 47 selfloop transitions, 0 changer transitions 0/49 dead transitions. [2022-11-25 17:19:24,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 204 flow [2022-11-25 17:19:24,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:19:24,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 17:19:24,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 348 transitions. [2022-11-25 17:19:24,881 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5058139534883721 [2022-11-25 17:19:24,882 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 348 transitions. [2022-11-25 17:19:24,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 348 transitions. [2022-11-25 17:19:24,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:24,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 348 transitions. [2022-11-25 17:19:24,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:24,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 344.0) internal successors, (1032), 3 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:24,897 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 344.0) internal successors, (1032), 3 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:24,899 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 132 flow. Second operand 2 states and 348 transitions. [2022-11-25 17:19:24,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 204 flow [2022-11-25 17:19:24,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 196 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:19:24,904 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 102 flow [2022-11-25 17:19:24,906 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=102, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2022-11-25 17:19:24,910 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -13 predicate places. [2022-11-25 17:19:24,910 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 102 flow [2022-11-25 17:19:24,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:24,911 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:24,911 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:19:24,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:25,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:25,122 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:19:25,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:25,123 INFO L85 PathProgramCache]: Analyzing trace with hash 629723, now seen corresponding path program 1 times [2022-11-25 17:19:25,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:25,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762577733] [2022-11-25 17:19:25,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:25,124 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 [2022-11-25 17:19:25,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:25,128 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 17:19:25,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:25,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:19:25,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:25,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:19:25,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 17:19:25,364 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 [2022-11-25 17:19:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:25,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:19:25,397 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:25,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762577733] [2022-11-25 17:19:25,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762577733] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:25,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:25,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:19:25,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914103279] [2022-11-25 17:19:25,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:25,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:19:25,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:25,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:19:25,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:19:25,670 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 344 [2022-11-25 17:19:25,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:25,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:25,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 344 [2022-11-25 17:19:25,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:26,040 INFO L130 PetriNetUnfolder]: 107/244 cut-off events. [2022-11-25 17:19:26,041 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:19:26,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 244 events. 107/244 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 998 event pairs, 59 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 482. Up to 228 conditions per place. [2022-11-25 17:19:26,043 INFO L137 encePairwiseOnDemand]: 339/344 looper letters, 48 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2022-11-25 17:19:26,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 54 transitions, 216 flow [2022-11-25 17:19:26,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:19:26,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:19:26,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2022-11-25 17:19:26,047 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45251937984496127 [2022-11-25 17:19:26,047 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2022-11-25 17:19:26,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2022-11-25 17:19:26,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:26,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2022-11-25 17:19:26,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:26,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:26,054 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:26,054 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 102 flow. Second operand 3 states and 467 transitions. [2022-11-25 17:19:26,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 54 transitions, 216 flow [2022-11-25 17:19:26,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:19:26,056 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 128 flow [2022-11-25 17:19:26,056 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2022-11-25 17:19:26,057 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -10 predicate places. [2022-11-25 17:19:26,057 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 128 flow [2022-11-25 17:19:26,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:26,058 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:26,058 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:19:26,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:26,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:26,270 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:19:26,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:26,271 INFO L85 PathProgramCache]: Analyzing trace with hash 629722, now seen corresponding path program 1 times [2022-11-25 17:19:26,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:26,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403828367] [2022-11-25 17:19:26,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:26,272 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 [2022-11-25 17:19:26,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:26,280 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 17:19:26,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:26,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:19:26,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:26,419 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 17:19:26,419 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 1 case distinctions, treesize of input 19 treesize of output 22 [2022-11-25 17:19:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:26,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:19:26,431 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:26,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403828367] [2022-11-25 17:19:26,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403828367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:26,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:26,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:19:26,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856663076] [2022-11-25 17:19:26,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:26,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:19:26,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:26,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:19:26,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:19:26,639 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 344 [2022-11-25 17:19:26,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:26,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:26,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 344 [2022-11-25 17:19:26,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:26,934 INFO L130 PetriNetUnfolder]: 109/255 cut-off events. [2022-11-25 17:19:26,935 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-25 17:19:26,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 255 events. 109/255 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1100 event pairs, 58 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 540. Up to 168 conditions per place. [2022-11-25 17:19:26,937 INFO L137 encePairwiseOnDemand]: 336/344 looper letters, 53 selfloop transitions, 7 changer transitions 0/62 dead transitions. [2022-11-25 17:19:26,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 62 transitions, 269 flow [2022-11-25 17:19:26,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:19:26,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:19:26,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2022-11-25 17:19:26,940 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4428294573643411 [2022-11-25 17:19:26,940 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2022-11-25 17:19:26,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2022-11-25 17:19:26,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:26,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2022-11-25 17:19:26,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:26,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:26,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:26,945 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 128 flow. Second operand 3 states and 457 transitions. [2022-11-25 17:19:26,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 62 transitions, 269 flow [2022-11-25 17:19:26,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 265 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:19:26,948 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 151 flow [2022-11-25 17:19:26,948 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2022-11-25 17:19:26,949 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -9 predicate places. [2022-11-25 17:19:26,949 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 151 flow [2022-11-25 17:19:26,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:26,950 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:26,950 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:19:26,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:27,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:27,162 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:19:27,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:27,162 INFO L85 PathProgramCache]: Analyzing trace with hash 19520492, now seen corresponding path program 1 times [2022-11-25 17:19:27,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:27,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673629169] [2022-11-25 17:19:27,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:27,164 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 [2022-11-25 17:19:27,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:27,165 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 17:19:27,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:27,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:19:27,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:27,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-25 17:19:27,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:19:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:27,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:19:27,333 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:27,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673629169] [2022-11-25 17:19:27,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673629169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:27,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:27,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:19:27,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262894961] [2022-11-25 17:19:27,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:27,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:19:27,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:27,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:19:27,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:19:27,687 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 344 [2022-11-25 17:19:27,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:27,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:27,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 344 [2022-11-25 17:19:27,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:27,988 INFO L130 PetriNetUnfolder]: 101/241 cut-off events. [2022-11-25 17:19:27,989 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 17:19:27,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548 conditions, 241 events. 101/241 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1075 event pairs, 48 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 542. Up to 158 conditions per place. [2022-11-25 17:19:27,991 INFO L137 encePairwiseOnDemand]: 336/344 looper letters, 51 selfloop transitions, 6 changer transitions 0/59 dead transitions. [2022-11-25 17:19:27,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 270 flow [2022-11-25 17:19:27,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:19:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:19:27,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2022-11-25 17:19:27,994 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46027131782945735 [2022-11-25 17:19:27,994 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2022-11-25 17:19:27,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2022-11-25 17:19:27,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:27,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2022-11-25 17:19:27,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:27,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:27,999 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:27,999 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 151 flow. Second operand 3 states and 475 transitions. [2022-11-25 17:19:27,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 270 flow [2022-11-25 17:19:28,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 59 transitions, 263 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:19:28,002 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 140 flow [2022-11-25 17:19:28,003 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2022-11-25 17:19:28,004 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -10 predicate places. [2022-11-25 17:19:28,004 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 140 flow [2022-11-25 17:19:28,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:28,004 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:28,005 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:19:28,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:28,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:28,217 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:19:28,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:28,217 INFO L85 PathProgramCache]: Analyzing trace with hash 605137380, now seen corresponding path program 1 times [2022-11-25 17:19:28,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:28,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580081827] [2022-11-25 17:19:28,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:28,218 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 [2022-11-25 17:19:28,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:28,219 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 17:19:28,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:28,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:19:28,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:28,429 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 17:19:28,430 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 1 case distinctions, treesize of input 19 treesize of output 22 [2022-11-25 17:19:28,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 17:19:28,527 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:19:28,528 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 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-25 17:19:28,553 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 17:19:28,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 17:19:28,608 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:19:28,609 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 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-25 17:19:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:28,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:19:28,668 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:28,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580081827] [2022-11-25 17:19:28,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580081827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:28,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:28,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:19:28,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382721017] [2022-11-25 17:19:28,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:28,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:19:28,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:28,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:19:28,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:19:29,584 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 344 [2022-11-25 17:19:29,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:29,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:29,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 344 [2022-11-25 17:19:29,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:30,110 INFO L130 PetriNetUnfolder]: 90/218 cut-off events. [2022-11-25 17:19:30,110 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-11-25 17:19:30,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 218 events. 90/218 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 921 event pairs, 39 based on Foata normal form. 10/102 useless extension candidates. Maximal degree in co-relation 485. Up to 134 conditions per place. [2022-11-25 17:19:30,115 INFO L137 encePairwiseOnDemand]: 335/344 looper letters, 48 selfloop transitions, 9 changer transitions 0/59 dead transitions. [2022-11-25 17:19:30,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 59 transitions, 273 flow [2022-11-25 17:19:30,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:19:30,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:19:30,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 820 transitions. [2022-11-25 17:19:30,119 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39728682170542634 [2022-11-25 17:19:30,119 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 820 transitions. [2022-11-25 17:19:30,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 820 transitions. [2022-11-25 17:19:30,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:30,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 820 transitions. [2022-11-25 17:19:30,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 136.66666666666666) internal successors, (820), 6 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:30,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 344.0) internal successors, (2408), 7 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:30,127 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 344.0) internal successors, (2408), 7 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:30,128 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 140 flow. Second operand 6 states and 820 transitions. [2022-11-25 17:19:30,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 59 transitions, 273 flow [2022-11-25 17:19:30,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 59 transitions, 267 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:19:30,130 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 148 flow [2022-11-25 17:19:30,130 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=148, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2022-11-25 17:19:30,133 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -7 predicate places. [2022-11-25 17:19:30,133 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 148 flow [2022-11-25 17:19:30,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:30,134 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:30,134 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:19:30,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:30,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:30,349 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting buildErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:19:30,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:30,350 INFO L85 PathProgramCache]: Analyzing trace with hash 605137440, now seen corresponding path program 1 times [2022-11-25 17:19:30,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:30,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863107505] [2022-11-25 17:19:30,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:30,351 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 [2022-11-25 17:19:30,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:30,356 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 17:19:30,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:30,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 17:19:30,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:30,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:30,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:19:30,541 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:30,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863107505] [2022-11-25 17:19:30,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863107505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:30,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:30,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:19:30,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689821303] [2022-11-25 17:19:30,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:30,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:19:30,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:30,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:19:30,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:19:30,830 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 344 [2022-11-25 17:19:30,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 148 flow. Second operand has 6 states, 6 states have (on average 135.83333333333334) internal successors, (815), 6 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:30,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:30,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 344 [2022-11-25 17:19:30,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:31,539 INFO L130 PetriNetUnfolder]: 100/248 cut-off events. [2022-11-25 17:19:31,539 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2022-11-25 17:19:31,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549 conditions, 248 events. 100/248 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1078 event pairs, 75 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 543. Up to 207 conditions per place. [2022-11-25 17:19:31,541 INFO L137 encePairwiseOnDemand]: 333/344 looper letters, 48 selfloop transitions, 9 changer transitions 0/59 dead transitions. [2022-11-25 17:19:31,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 59 transitions, 284 flow [2022-11-25 17:19:31,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:19:31,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:19:31,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1003 transitions. [2022-11-25 17:19:31,545 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4165282392026578 [2022-11-25 17:19:31,545 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1003 transitions. [2022-11-25 17:19:31,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1003 transitions. [2022-11-25 17:19:31,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:31,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1003 transitions. [2022-11-25 17:19:31,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 143.28571428571428) internal successors, (1003), 7 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:31,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 344.0) internal successors, (2752), 8 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:31,554 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 344.0) internal successors, (2752), 8 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:31,554 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 148 flow. Second operand 7 states and 1003 transitions. [2022-11-25 17:19:31,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 59 transitions, 284 flow [2022-11-25 17:19:31,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 59 transitions, 271 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:19:31,557 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 186 flow [2022-11-25 17:19:31,557 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2022-11-25 17:19:31,558 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -3 predicate places. [2022-11-25 17:19:31,558 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 186 flow [2022-11-25 17:19:31,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 135.83333333333334) internal successors, (815), 6 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:31,559 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:31,559 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:31,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:31,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:31,771 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting buildErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:19:31,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:31,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1716476300, now seen corresponding path program 1 times [2022-11-25 17:19:31,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:31,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995018887] [2022-11-25 17:19:31,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:31,772 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 [2022-11-25 17:19:31,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:31,773 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 17:19:31,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:31,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:19:31,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:31,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-25 17:19:31,952 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 17:19:31,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-25 17:19:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:31,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:19:31,959 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:31,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995018887] [2022-11-25 17:19:31,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995018887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:31,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:31,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:19:31,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582738340] [2022-11-25 17:19:31,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:31,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:19:31,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:31,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:19:31,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:19:32,176 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 344 [2022-11-25 17:19:32,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:32,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:32,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 344 [2022-11-25 17:19:32,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:32,470 INFO L130 PetriNetUnfolder]: 100/242 cut-off events. [2022-11-25 17:19:32,470 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-11-25 17:19:32,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 242 events. 100/242 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1034 event pairs, 37 based on Foata normal form. 6/124 useless extension candidates. Maximal degree in co-relation 575. Up to 149 conditions per place. [2022-11-25 17:19:32,472 INFO L137 encePairwiseOnDemand]: 336/344 looper letters, 54 selfloop transitions, 7 changer transitions 0/62 dead transitions. [2022-11-25 17:19:32,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 62 transitions, 327 flow [2022-11-25 17:19:32,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:19:32,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:19:32,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 447 transitions. [2022-11-25 17:19:32,475 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2022-11-25 17:19:32,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 447 transitions. [2022-11-25 17:19:32,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 447 transitions. [2022-11-25 17:19:32,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:32,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 447 transitions. [2022-11-25 17:19:32,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:32,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:32,479 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:32,479 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 186 flow. Second operand 3 states and 447 transitions. [2022-11-25 17:19:32,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 62 transitions, 327 flow [2022-11-25 17:19:32,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 62 transitions, 322 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:19:32,482 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 193 flow [2022-11-25 17:19:32,482 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=193, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2022-11-25 17:19:32,483 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -5 predicate places. [2022-11-25 17:19:32,483 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 193 flow [2022-11-25 17:19:32,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:32,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:32,484 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:32,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:32,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:32,698 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting buildErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:19:32,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:32,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1716476503, now seen corresponding path program 1 times [2022-11-25 17:19:32,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:32,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862261152] [2022-11-25 17:19:32,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:32,699 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 [2022-11-25 17:19:32,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:32,700 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 17:19:32,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:32,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:19:32,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:32,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:19:32,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:19:32,945 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 17:19:32,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 17:19:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:32,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:19:32,964 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:32,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862261152] [2022-11-25 17:19:32,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862261152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:32,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:32,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:19:32,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059656387] [2022-11-25 17:19:32,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:32,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:19:32,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:32,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:19:32,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:19:33,748 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 344 [2022-11-25 17:19:33,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 193 flow. Second operand has 6 states, 6 states have (on average 132.16666666666666) internal successors, (793), 6 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:33,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:33,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 344 [2022-11-25 17:19:33,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:34,112 INFO L130 PetriNetUnfolder]: 92/226 cut-off events. [2022-11-25 17:19:34,112 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-11-25 17:19:34,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 555 conditions, 226 events. 92/226 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 967 event pairs, 36 based on Foata normal form. 6/114 useless extension candidates. Maximal degree in co-relation 547. Up to 127 conditions per place. [2022-11-25 17:19:34,114 INFO L137 encePairwiseOnDemand]: 330/344 looper letters, 45 selfloop transitions, 14 changer transitions 0/60 dead transitions. [2022-11-25 17:19:34,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 60 transitions, 318 flow [2022-11-25 17:19:34,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:19:34,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:19:34,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 844 transitions. [2022-11-25 17:19:34,118 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40891472868217055 [2022-11-25 17:19:34,118 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 844 transitions. [2022-11-25 17:19:34,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 844 transitions. [2022-11-25 17:19:34,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:34,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 844 transitions. [2022-11-25 17:19:34,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 140.66666666666666) internal successors, (844), 6 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:34,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 344.0) internal successors, (2408), 7 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:34,125 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 344.0) internal successors, (2408), 7 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:34,125 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 193 flow. Second operand 6 states and 844 transitions. [2022-11-25 17:19:34,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 60 transitions, 318 flow [2022-11-25 17:19:34,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 60 transitions, 298 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:19:34,127 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 183 flow [2022-11-25 17:19:34,128 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2022-11-25 17:19:34,128 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -5 predicate places. [2022-11-25 17:19:34,129 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 183 flow [2022-11-25 17:19:34,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 132.16666666666666) internal successors, (793), 6 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:34,129 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:34,129 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:34,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:34,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:34,342 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting buildErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:19:34,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:34,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1716476301, now seen corresponding path program 1 times [2022-11-25 17:19:34,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:34,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116019476] [2022-11-25 17:19:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:34,344 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 [2022-11-25 17:19:34,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:34,345 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 17:19:34,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:34,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:19:34,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:34,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-25 17:19:34,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:19:34,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:19:34,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:19:34,571 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 17:19:34,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 17:19:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:34,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:19:34,585 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:34,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116019476] [2022-11-25 17:19:34,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116019476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:34,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:34,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:19:34,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657726531] [2022-11-25 17:19:34,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:34,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:19:34,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:34,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:19:34,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:19:34,986 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 344 [2022-11-25 17:19:34,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 183 flow. Second operand has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:34,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:34,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 344 [2022-11-25 17:19:34,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:35,271 INFO L130 PetriNetUnfolder]: 92/220 cut-off events. [2022-11-25 17:19:35,271 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-11-25 17:19:35,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 220 events. 92/220 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 922 event pairs, 37 based on Foata normal form. 6/104 useless extension candidates. Maximal degree in co-relation 554. Up to 133 conditions per place. [2022-11-25 17:19:35,273 INFO L137 encePairwiseOnDemand]: 336/344 looper letters, 50 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2022-11-25 17:19:35,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 316 flow [2022-11-25 17:19:35,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:19:35,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:19:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 547 transitions. [2022-11-25 17:19:35,277 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39752906976744184 [2022-11-25 17:19:35,277 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 547 transitions. [2022-11-25 17:19:35,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 547 transitions. [2022-11-25 17:19:35,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:35,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 547 transitions. [2022-11-25 17:19:35,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:35,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 344.0) internal successors, (1720), 5 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:35,282 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 344.0) internal successors, (1720), 5 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:35,282 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 183 flow. Second operand 4 states and 547 transitions. [2022-11-25 17:19:35,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 316 flow [2022-11-25 17:19:35,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 295 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-25 17:19:35,284 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 174 flow [2022-11-25 17:19:35,285 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2022-11-25 17:19:35,285 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -8 predicate places. [2022-11-25 17:19:35,285 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 174 flow [2022-11-25 17:19:35,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:35,286 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:35,286 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:35,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:35,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:35,505 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting buildErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:19:35,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:35,506 INFO L85 PathProgramCache]: Analyzing trace with hash -329517808, now seen corresponding path program 1 times [2022-11-25 17:19:35,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:35,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461871197] [2022-11-25 17:19:35,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:35,506 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 [2022-11-25 17:19:35,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:35,507 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 17:19:35,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:35,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 17:19:35,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:35,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:19:35,823 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-25 17:19:35,823 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 1 case distinctions, treesize of input 18 treesize of output 24 [2022-11-25 17:19:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:35,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:35,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-25 17:19:36,017 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-25 17:19:36,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-11-25 17:19:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:36,043 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:36,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461871197] [2022-11-25 17:19:36,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461871197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:36,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:19:36,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2022-11-25 17:19:36,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471482546] [2022-11-25 17:19:36,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:36,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:19:36,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:36,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:19:36,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:19:38,124 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 [1] [2022-11-25 17:19:39,209 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 344 [2022-11-25 17:19:39,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 174 flow. Second operand has 8 states, 8 states have (on average 107.75) internal successors, (862), 8 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:39,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:39,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 344 [2022-11-25 17:19:39,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:39,805 INFO L130 PetriNetUnfolder]: 91/217 cut-off events. [2022-11-25 17:19:39,805 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-25 17:19:39,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 217 events. 91/217 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 902 event pairs, 37 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 555. Up to 106 conditions per place. [2022-11-25 17:19:39,807 INFO L137 encePairwiseOnDemand]: 332/344 looper letters, 46 selfloop transitions, 12 changer transitions 0/58 dead transitions. [2022-11-25 17:19:39,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 58 transitions, 310 flow [2022-11-25 17:19:39,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:19:39,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:19:39,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 588 transitions. [2022-11-25 17:19:39,810 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34186046511627904 [2022-11-25 17:19:39,810 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 588 transitions. [2022-11-25 17:19:39,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 588 transitions. [2022-11-25 17:19:39,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:39,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 588 transitions. [2022-11-25 17:19:39,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.6) internal successors, (588), 5 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:39,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 344.0) internal successors, (2064), 6 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:39,815 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 344.0) internal successors, (2064), 6 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:39,816 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 174 flow. Second operand 5 states and 588 transitions. [2022-11-25 17:19:39,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 58 transitions, 310 flow [2022-11-25 17:19:39,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 302 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:19:39,818 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 185 flow [2022-11-25 17:19:39,818 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2022-11-25 17:19:39,819 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -7 predicate places. [2022-11-25 17:19:39,819 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 185 flow [2022-11-25 17:19:39,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 107.75) internal successors, (862), 8 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:39,820 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:39,820 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:39,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:40,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:40,033 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting buildErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:19:40,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:40,034 INFO L85 PathProgramCache]: Analyzing trace with hash -329517807, now seen corresponding path program 1 times [2022-11-25 17:19:40,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:40,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475606839] [2022-11-25 17:19:40,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:40,035 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 [2022-11-25 17:19:40,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:40,036 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 17:19:40,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:19:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:40,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 17:19:40,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:40,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:19:40,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:19:40,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:19:40,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:19:40,448 INFO L321 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-11-25 17:19:40,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-25 17:19:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:40,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:40,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-11-25 17:19:40,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2022-11-25 17:19:41,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-11-25 17:19:48,358 WARN L233 SmtUtils]: Spent 6.66s on a formula simplification. DAG size of input: 59 DAG size of output: 30 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:19:48,479 INFO L321 Elim1Store]: treesize reduction 7, result has 77.4 percent of original size [2022-11-25 17:19:48,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 65 [2022-11-25 17:19:48,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2022-11-25 17:19:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:48,701 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:48,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475606839] [2022-11-25 17:19:48,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475606839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:48,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:19:48,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2022-11-25 17:19:48,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022564802] [2022-11-25 17:19:48,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:48,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 17:19:48,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:48,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 17:19:48,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:19:50,907 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 [1] [2022-11-25 17:19:53,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:19:56,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:19:58,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:20:01,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:20:03,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:20:05,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:20:07,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:20:10,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:20:12,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:20:14,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:20:16,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:20:19,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:20:21,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:20:25,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:20:25,579 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 344 [2022-11-25 17:20:25,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 185 flow. Second operand has 11 states, 11 states have (on average 97.63636363636364) internal successors, (1074), 11 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:25,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:25,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 344 [2022-11-25 17:20:25,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:26,613 INFO L130 PetriNetUnfolder]: 93/219 cut-off events. [2022-11-25 17:20:26,614 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-11-25 17:20:26,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 219 events. 93/219 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 913 event pairs, 36 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 589. Up to 102 conditions per place. [2022-11-25 17:20:26,616 INFO L137 encePairwiseOnDemand]: 332/344 looper letters, 49 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2022-11-25 17:20:26,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 60 transitions, 335 flow [2022-11-25 17:20:26,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:20:26,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:20:26,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 636 transitions. [2022-11-25 17:20:26,619 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3081395348837209 [2022-11-25 17:20:26,619 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 636 transitions. [2022-11-25 17:20:26,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 636 transitions. [2022-11-25 17:20:26,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:26,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 636 transitions. [2022-11-25 17:20:26,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.0) internal successors, (636), 6 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:26,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 344.0) internal successors, (2408), 7 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:26,625 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 344.0) internal successors, (2408), 7 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:26,625 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 185 flow. Second operand 6 states and 636 transitions. [2022-11-25 17:20:26,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 60 transitions, 335 flow [2022-11-25 17:20:26,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 60 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:20:26,628 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 223 flow [2022-11-25 17:20:26,628 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2022-11-25 17:20:26,628 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -3 predicate places. [2022-11-25 17:20:26,629 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 223 flow [2022-11-25 17:20:26,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 97.63636363636364) internal successors, (1074), 11 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:26,629 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:26,630 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:26,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:26,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:26,843 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:20:26,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:26,843 INFO L85 PathProgramCache]: Analyzing trace with hash 521961780, now seen corresponding path program 1 times [2022-11-25 17:20:26,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:20:26,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991831460] [2022-11-25 17:20:26,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:26,844 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 [2022-11-25 17:20:26,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:20:26,846 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 17:20:26,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:27,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:20:27,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:27,040 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 17:20:27,040 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 1 case distinctions, treesize of input 9 treesize of output 19 [2022-11-25 17:20:27,086 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 17:20:27,086 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 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-25 17:20:27,134 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 17:20:27,135 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 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-25 17:20:27,235 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 17:20:27,235 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 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-25 17:20:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:27,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:20:27,546 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:20:27,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991831460] [2022-11-25 17:20:27,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1991831460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:20:27,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:20:27,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:20:27,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413172010] [2022-11-25 17:20:27,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:20:27,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:20:27,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:20:27,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:20:27,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:20:28,798 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 344 [2022-11-25 17:20:28,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 223 flow. Second operand has 7 states, 7 states have (on average 115.57142857142857) internal successors, (809), 7 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:28,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:28,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 344 [2022-11-25 17:20:28,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:29,189 INFO L130 PetriNetUnfolder]: 74/197 cut-off events. [2022-11-25 17:20:29,189 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2022-11-25 17:20:29,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 580 conditions, 197 events. 74/197 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 843 event pairs, 42 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 572. Up to 128 conditions per place. [2022-11-25 17:20:29,191 INFO L137 encePairwiseOnDemand]: 333/344 looper letters, 46 selfloop transitions, 11 changer transitions 0/57 dead transitions. [2022-11-25 17:20:29,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 57 transitions, 363 flow [2022-11-25 17:20:29,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:20:29,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:20:29,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2022-11-25 17:20:29,193 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2022-11-25 17:20:29,193 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 393 transitions. [2022-11-25 17:20:29,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 393 transitions. [2022-11-25 17:20:29,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:29,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 393 transitions. [2022-11-25 17:20:29,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:29,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:29,196 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:29,196 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 223 flow. Second operand 3 states and 393 transitions. [2022-11-25 17:20:29,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 57 transitions, 363 flow [2022-11-25 17:20:29,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 57 transitions, 343 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:20:29,199 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 268 flow [2022-11-25 17:20:29,199 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2022-11-25 17:20:29,201 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -4 predicate places. [2022-11-25 17:20:29,202 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 268 flow [2022-11-25 17:20:29,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 115.57142857142857) internal successors, (809), 7 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:29,202 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:29,202 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:29,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:29,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:29,415 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:20:29,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:29,416 INFO L85 PathProgramCache]: Analyzing trace with hash 625385239, now seen corresponding path program 1 times [2022-11-25 17:20:29,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:20:29,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142686433] [2022-11-25 17:20:29,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:29,416 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 [2022-11-25 17:20:29,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:20:29,418 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 17:20:29,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:29,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 17:20:29,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:29,637 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:20:29,637 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-25 17:20:29,675 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 17:20:29,675 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 1 case distinctions, treesize of input 9 treesize of output 19 [2022-11-25 17:20:29,754 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:20:29,754 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 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-25 17:20:29,784 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 17:20:29,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 17:20:29,862 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:20:29,862 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 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-25 17:20:29,946 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:20:29,946 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 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-25 17:20:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:30,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:20:30,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:20:30,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142686433] [2022-11-25 17:20:30,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142686433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:20:30,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:20:30,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:20:30,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587935554] [2022-11-25 17:20:30,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:20:30,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:20:30,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:20:30,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:20:30,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:20:33,119 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 344 [2022-11-25 17:20:33,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 268 flow. Second operand has 7 states, 7 states have (on average 125.57142857142857) internal successors, (879), 7 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:33,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:33,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 344 [2022-11-25 17:20:33,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:33,743 INFO L130 PetriNetUnfolder]: 50/148 cut-off events. [2022-11-25 17:20:33,743 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-11-25 17:20:33,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 514 conditions, 148 events. 50/148 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 562 event pairs, 18 based on Foata normal form. 25/127 useless extension candidates. Maximal degree in co-relation 505. Up to 98 conditions per place. [2022-11-25 17:20:33,744 INFO L137 encePairwiseOnDemand]: 331/344 looper letters, 44 selfloop transitions, 13 changer transitions 0/57 dead transitions. [2022-11-25 17:20:33,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 57 transitions, 401 flow [2022-11-25 17:20:33,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:20:33,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:20:33,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 797 transitions. [2022-11-25 17:20:33,747 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3861434108527132 [2022-11-25 17:20:33,747 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 797 transitions. [2022-11-25 17:20:33,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 797 transitions. [2022-11-25 17:20:33,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:33,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 797 transitions. [2022-11-25 17:20:33,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 132.83333333333334) internal successors, (797), 6 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:33,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 344.0) internal successors, (2408), 7 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:33,753 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 344.0) internal successors, (2408), 7 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:33,753 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 268 flow. Second operand 6 states and 797 transitions. [2022-11-25 17:20:33,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 57 transitions, 401 flow [2022-11-25 17:20:33,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 57 transitions, 373 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-25 17:20:33,756 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 290 flow [2022-11-25 17:20:33,756 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=290, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2022-11-25 17:20:33,757 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -1 predicate places. [2022-11-25 17:20:33,757 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 290 flow [2022-11-25 17:20:33,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 125.57142857142857) internal successors, (879), 7 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:33,757 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:33,758 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:33,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:33,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:33,970 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting deleteErr9ASSERT_VIOLATIONMEMORY_FREE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:20:33,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:33,971 INFO L85 PathProgramCache]: Analyzing trace with hash -905891249, now seen corresponding path program 1 times [2022-11-25 17:20:33,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:20:33,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371498655] [2022-11-25 17:20:33,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:33,971 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 [2022-11-25 17:20:33,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:20:33,972 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 17:20:33,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:34,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:20:34,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:34,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:20:34,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:20:34,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371498655] [2022-11-25 17:20:34,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371498655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:20:34,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:20:34,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:20:34,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783889704] [2022-11-25 17:20:34,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:20:34,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:20:34,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:20:34,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:20:34,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:20:34,206 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 344 [2022-11-25 17:20:34,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 290 flow. Second operand has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:34,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:34,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 344 [2022-11-25 17:20:34,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:34,449 INFO L130 PetriNetUnfolder]: 46/133 cut-off events. [2022-11-25 17:20:34,449 INFO L131 PetriNetUnfolder]: For 139/139 co-relation queries the response was YES. [2022-11-25 17:20:34,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 133 events. 46/133 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 457 event pairs, 34 based on Foata normal form. 2/95 useless extension candidates. Maximal degree in co-relation 433. Up to 86 conditions per place. [2022-11-25 17:20:34,450 INFO L137 encePairwiseOnDemand]: 339/344 looper letters, 41 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2022-11-25 17:20:34,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 43 transitions, 312 flow [2022-11-25 17:20:34,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:20:34,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:20:34,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 607 transitions. [2022-11-25 17:20:34,459 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44113372093023256 [2022-11-25 17:20:34,459 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 607 transitions. [2022-11-25 17:20:34,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 607 transitions. [2022-11-25 17:20:34,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:34,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 607 transitions. [2022-11-25 17:20:34,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:34,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 344.0) internal successors, (1720), 5 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:34,465 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 344.0) internal successors, (1720), 5 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:34,465 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 290 flow. Second operand 4 states and 607 transitions. [2022-11-25 17:20:34,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 43 transitions, 312 flow [2022-11-25 17:20:34,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 43 transitions, 290 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-25 17:20:34,467 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 208 flow [2022-11-25 17:20:34,467 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2022-11-25 17:20:34,468 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -6 predicate places. [2022-11-25 17:20:34,468 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 208 flow [2022-11-25 17:20:34,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:34,469 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:34,469 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:34,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:34,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:34,682 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting deleteErr7ASSERT_VIOLATIONMEMORY_FREE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:20:34,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:34,682 INFO L85 PathProgramCache]: Analyzing trace with hash -905891247, now seen corresponding path program 1 times [2022-11-25 17:20:34,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:20:34,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496622165] [2022-11-25 17:20:34,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:34,683 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 [2022-11-25 17:20:34,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:20:34,684 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 17:20:34,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:34,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:20:34,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:34,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:34,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:20:34,899 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:20:34,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496622165] [2022-11-25 17:20:34,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496622165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:20:34,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:20:34,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:20:34,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855489733] [2022-11-25 17:20:34,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:20:34,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:20:34,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:20:34,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:20:34,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:20:34,913 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 344 [2022-11-25 17:20:34,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:34,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:34,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 344 [2022-11-25 17:20:34,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:35,122 INFO L130 PetriNetUnfolder]: 46/129 cut-off events. [2022-11-25 17:20:35,122 INFO L131 PetriNetUnfolder]: For 86/86 co-relation queries the response was YES. [2022-11-25 17:20:35,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 129 events. 46/129 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 415 event pairs, 34 based on Foata normal form. 2/91 useless extension candidates. Maximal degree in co-relation 378. Up to 82 conditions per place. [2022-11-25 17:20:35,123 INFO L137 encePairwiseOnDemand]: 341/344 looper letters, 40 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2022-11-25 17:20:35,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 42 transitions, 277 flow [2022-11-25 17:20:35,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:20:35,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:20:35,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 604 transitions. [2022-11-25 17:20:35,126 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2022-11-25 17:20:35,126 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 604 transitions. [2022-11-25 17:20:35,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 604 transitions. [2022-11-25 17:20:35,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:35,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 604 transitions. [2022-11-25 17:20:35,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:35,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 344.0) internal successors, (1720), 5 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:35,137 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 344.0) internal successors, (1720), 5 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:35,137 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 208 flow. Second operand 4 states and 604 transitions. [2022-11-25 17:20:35,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 42 transitions, 277 flow [2022-11-25 17:20:35,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 42 transitions, 274 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:20:35,139 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 194 flow [2022-11-25 17:20:35,139 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=56, PETRI_TRANSITIONS=42} [2022-11-25 17:20:35,140 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -6 predicate places. [2022-11-25 17:20:35,140 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 194 flow [2022-11-25 17:20:35,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:35,140 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:35,141 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:35,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:35,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:35,354 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting deleteErr4ASSERT_VIOLATIONMEMORY_FREE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:20:35,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:35,354 INFO L85 PathProgramCache]: Analyzing trace with hash -905891274, now seen corresponding path program 1 times [2022-11-25 17:20:35,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:20:35,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191886956] [2022-11-25 17:20:35,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:35,354 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 [2022-11-25 17:20:35,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:20:35,355 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 17:20:35,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:35,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:20:35,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:35,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:20:35,612 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:20:35,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191886956] [2022-11-25 17:20:35,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191886956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:20:35,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:20:35,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:20:35,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665390181] [2022-11-25 17:20:35,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:20:35,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:20:35,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:20:35,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:20:35,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:20:35,625 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 344 [2022-11-25 17:20:35,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 42 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:35,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:35,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 344 [2022-11-25 17:20:35,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:35,844 INFO L130 PetriNetUnfolder]: 40/111 cut-off events. [2022-11-25 17:20:35,844 INFO L131 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2022-11-25 17:20:35,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 111 events. 40/111 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 333 event pairs, 28 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 337. Up to 64 conditions per place. [2022-11-25 17:20:35,846 INFO L137 encePairwiseOnDemand]: 336/344 looper letters, 34 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2022-11-25 17:20:35,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 36 transitions, 254 flow [2022-11-25 17:20:35,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:20:35,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:20:35,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 603 transitions. [2022-11-25 17:20:35,849 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4382267441860465 [2022-11-25 17:20:35,849 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 603 transitions. [2022-11-25 17:20:35,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 603 transitions. [2022-11-25 17:20:35,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:35,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 603 transitions. [2022-11-25 17:20:35,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.75) internal successors, (603), 4 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:35,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 344.0) internal successors, (1720), 5 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:35,853 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 344.0) internal successors, (1720), 5 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:35,854 INFO L175 Difference]: Start difference. First operand has 56 places, 42 transitions, 194 flow. Second operand 4 states and 603 transitions. [2022-11-25 17:20:35,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 36 transitions, 254 flow [2022-11-25 17:20:35,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 36 transitions, 251 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:20:35,856 INFO L231 Difference]: Finished difference. Result has 51 places, 36 transitions, 183 flow [2022-11-25 17:20:35,856 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=51, PETRI_TRANSITIONS=36} [2022-11-25 17:20:35,856 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -11 predicate places. [2022-11-25 17:20:35,856 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 36 transitions, 183 flow [2022-11-25 17:20:35,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:35,857 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:35,857 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:35,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:36,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:36,065 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting deleteErr12ASSERT_VIOLATIONMEMORY_FREE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:20:36,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:36,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1982139646, now seen corresponding path program 1 times [2022-11-25 17:20:36,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:20:36,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350913044] [2022-11-25 17:20:36,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:36,066 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 [2022-11-25 17:20:36,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:20:36,067 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 17:20:36,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:36,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 17:20:36,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:36,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:20:36,253 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:20:36,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350913044] [2022-11-25 17:20:36,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350913044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:20:36,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:20:36,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:20:36,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289167557] [2022-11-25 17:20:36,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:20:36,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:20:36,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:20:36,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:20:36,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:20:36,311 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 344 [2022-11-25 17:20:36,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 36 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:36,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:36,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 344 [2022-11-25 17:20:36,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:36,531 INFO L130 PetriNetUnfolder]: 39/108 cut-off events. [2022-11-25 17:20:36,531 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2022-11-25 17:20:36,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 108 events. 39/108 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 308 event pairs, 18 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 331. Up to 76 conditions per place. [2022-11-25 17:20:36,532 INFO L137 encePairwiseOnDemand]: 339/344 looper letters, 39 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2022-11-25 17:20:36,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 43 transitions, 291 flow [2022-11-25 17:20:36,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:20:36,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:20:36,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2022-11-25 17:20:36,535 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2022-11-25 17:20:36,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2022-11-25 17:20:36,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2022-11-25 17:20:36,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:36,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2022-11-25 17:20:36,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:36,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:36,539 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:36,539 INFO L175 Difference]: Start difference. First operand has 51 places, 36 transitions, 183 flow. Second operand 3 states and 441 transitions. [2022-11-25 17:20:36,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 43 transitions, 291 flow [2022-11-25 17:20:36,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 43 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:20:36,541 INFO L231 Difference]: Finished difference. Result has 53 places, 38 transitions, 206 flow [2022-11-25 17:20:36,542 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=53, PETRI_TRANSITIONS=38} [2022-11-25 17:20:36,542 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -9 predicate places. [2022-11-25 17:20:36,542 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 38 transitions, 206 flow [2022-11-25 17:20:36,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:36,543 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:36,543 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:36,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:36,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:36,755 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting deleteErr13ASSERT_VIOLATIONMEMORY_FREE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:20:36,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:36,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1982139645, now seen corresponding path program 1 times [2022-11-25 17:20:36,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:20:36,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196992482] [2022-11-25 17:20:36,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:36,756 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 [2022-11-25 17:20:36,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:20:36,766 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 17:20:36,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:36,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:20:36,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:37,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:20:37,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:20:37,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196992482] [2022-11-25 17:20:37,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196992482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:20:37,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:20:37,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:20:37,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015109415] [2022-11-25 17:20:37,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:20:37,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:20:37,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:20:37,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:20:37,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:20:37,208 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 344 [2022-11-25 17:20:37,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 38 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 138.8) internal successors, (694), 5 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:37,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:37,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 344 [2022-11-25 17:20:37,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:37,463 INFO L130 PetriNetUnfolder]: 22/63 cut-off events. [2022-11-25 17:20:37,463 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-11-25 17:20:37,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 63 events. 22/63 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 100 event pairs, 12 based on Foata normal form. 2/59 useless extension candidates. Maximal degree in co-relation 200. Up to 47 conditions per place. [2022-11-25 17:20:37,464 INFO L137 encePairwiseOnDemand]: 339/344 looper letters, 25 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2022-11-25 17:20:37,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 28 transitions, 191 flow [2022-11-25 17:20:37,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:20:37,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:20:37,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 704 transitions. [2022-11-25 17:20:37,467 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2022-11-25 17:20:37,467 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 704 transitions. [2022-11-25 17:20:37,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 704 transitions. [2022-11-25 17:20:37,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:37,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 704 transitions. [2022-11-25 17:20:37,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.8) internal successors, (704), 5 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:37,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 344.0) internal successors, (2064), 6 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:37,472 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 344.0) internal successors, (2064), 6 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:37,472 INFO L175 Difference]: Start difference. First operand has 53 places, 38 transitions, 206 flow. Second operand 5 states and 704 transitions. [2022-11-25 17:20:37,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 28 transitions, 191 flow [2022-11-25 17:20:37,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 28 transitions, 174 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-11-25 17:20:37,473 INFO L231 Difference]: Finished difference. Result has 45 places, 27 transitions, 122 flow [2022-11-25 17:20:37,474 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=45, PETRI_TRANSITIONS=27} [2022-11-25 17:20:37,474 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -17 predicate places. [2022-11-25 17:20:37,474 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 27 transitions, 122 flow [2022-11-25 17:20:37,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.8) internal successors, (694), 5 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:37,475 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:37,475 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:37,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:37,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:37,675 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting deleteErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:20:37,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:37,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1982139552, now seen corresponding path program 1 times [2022-11-25 17:20:37,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:20:37,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633627429] [2022-11-25 17:20:37,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:37,676 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 [2022-11-25 17:20:37,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:20:37,677 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 17:20:37,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:37,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:20:37,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:37,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:37,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:20:37,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:20:37,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633627429] [2022-11-25 17:20:37,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633627429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:20:37,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:20:37,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:20:37,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510665147] [2022-11-25 17:20:37,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:20:37,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:20:37,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:20:37,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:20:37,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:20:38,063 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 344 [2022-11-25 17:20:38,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 27 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 134.8) internal successors, (674), 5 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:38,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:38,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 344 [2022-11-25 17:20:38,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:38,279 INFO L130 PetriNetUnfolder]: 20/57 cut-off events. [2022-11-25 17:20:38,279 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 17:20:38,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 57 events. 20/57 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 82 event pairs, 12 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 178. Up to 47 conditions per place. [2022-11-25 17:20:38,280 INFO L137 encePairwiseOnDemand]: 339/344 looper letters, 23 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2022-11-25 17:20:38,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 26 transitions, 172 flow [2022-11-25 17:20:38,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:20:38,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:20:38,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 682 transitions. [2022-11-25 17:20:38,282 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39651162790697675 [2022-11-25 17:20:38,282 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 682 transitions. [2022-11-25 17:20:38,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 682 transitions. [2022-11-25 17:20:38,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:38,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 682 transitions. [2022-11-25 17:20:38,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.4) internal successors, (682), 5 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:38,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 344.0) internal successors, (2064), 6 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:38,297 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 344.0) internal successors, (2064), 6 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:38,298 INFO L175 Difference]: Start difference. First operand has 45 places, 27 transitions, 122 flow. Second operand 5 states and 682 transitions. [2022-11-25 17:20:38,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 26 transitions, 172 flow [2022-11-25 17:20:38,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 26 transitions, 167 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:20:38,299 INFO L231 Difference]: Finished difference. Result has 44 places, 25 transitions, 119 flow [2022-11-25 17:20:38,299 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=44, PETRI_TRANSITIONS=25} [2022-11-25 17:20:38,300 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -18 predicate places. [2022-11-25 17:20:38,300 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 25 transitions, 119 flow [2022-11-25 17:20:38,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.8) internal successors, (674), 5 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:38,300 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:38,300 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:38,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:38,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:38,509 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2022-11-25 17:20:38,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:38,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1551546246, now seen corresponding path program 1 times [2022-11-25 17:20:38,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:20:38,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855454057] [2022-11-25 17:20:38,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:38,510 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 [2022-11-25 17:20:38,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:20:38,511 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 17:20:38,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:20:38,758 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:20:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:20:38,941 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-11-25 17:20:38,941 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:20:38,942 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (68 of 69 remaining) [2022-11-25 17:20:38,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 69 remaining) [2022-11-25 17:20:38,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 69 remaining) [2022-11-25 17:20:38,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 69 remaining) [2022-11-25 17:20:38,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 69 remaining) [2022-11-25 17:20:38,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 69 remaining) [2022-11-25 17:20:38,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 69 remaining) [2022-11-25 17:20:38,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 69 remaining) [2022-11-25 17:20:38,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 69 remaining) [2022-11-25 17:20:38,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 69 remaining) [2022-11-25 17:20:38,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 69 remaining) [2022-11-25 17:20:38,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 69 remaining) [2022-11-25 17:20:38,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 69 remaining) [2022-11-25 17:20:38,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 69 remaining) [2022-11-25 17:20:38,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 69 remaining) [2022-11-25 17:20:38,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 69 remaining) [2022-11-25 17:20:38,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 69 remaining) [2022-11-25 17:20:38,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 69 remaining) [2022-11-25 17:20:38,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 69 remaining) [2022-11-25 17:20:38,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 69 remaining) [2022-11-25 17:20:38,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 69 remaining) [2022-11-25 17:20:38,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 69 remaining) [2022-11-25 17:20:38,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 69 remaining) [2022-11-25 17:20:38,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (45 of 69 remaining) [2022-11-25 17:20:38,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (44 of 69 remaining) [2022-11-25 17:20:38,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 69 remaining) [2022-11-25 17:20:38,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 69 remaining) [2022-11-25 17:20:38,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 69 remaining) [2022-11-25 17:20:38,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 69 remaining) [2022-11-25 17:20:38,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 69 remaining) [2022-11-25 17:20:38,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 69 remaining) [2022-11-25 17:20:38,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr4ASSERT_VIOLATIONMEMORY_FREE (37 of 69 remaining) [2022-11-25 17:20:38,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr12ASSERT_VIOLATIONMEMORY_FREE (36 of 69 remaining) [2022-11-25 17:20:38,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr5ASSERT_VIOLATIONMEMORY_FREE (35 of 69 remaining) [2022-11-25 17:20:38,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr13ASSERT_VIOLATIONMEMORY_FREE (34 of 69 remaining) [2022-11-25 17:20:38,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr6ASSERT_VIOLATIONMEMORY_FREE (33 of 69 remaining) [2022-11-25 17:20:38,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr14ASSERT_VIOLATIONMEMORY_FREE (32 of 69 remaining) [2022-11-25 17:20:38,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr7ASSERT_VIOLATIONMEMORY_FREE (31 of 69 remaining) [2022-11-25 17:20:38,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr8ASSERT_VIOLATIONMEMORY_FREE (30 of 69 remaining) [2022-11-25 17:20:38,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr9ASSERT_VIOLATIONMEMORY_FREE (29 of 69 remaining) [2022-11-25 17:20:38,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 69 remaining) [2022-11-25 17:20:38,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 69 remaining) [2022-11-25 17:20:38,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 69 remaining) [2022-11-25 17:20:38,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 69 remaining) [2022-11-25 17:20:38,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 69 remaining) [2022-11-25 17:20:38,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 69 remaining) [2022-11-25 17:20:38,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 69 remaining) [2022-11-25 17:20:38,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 69 remaining) [2022-11-25 17:20:38,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 69 remaining) [2022-11-25 17:20:38,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 69 remaining) [2022-11-25 17:20:38,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 69 remaining) [2022-11-25 17:20:38,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 69 remaining) [2022-11-25 17:20:38,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 69 remaining) [2022-11-25 17:20:38,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location buildErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 69 remaining) [2022-11-25 17:20:38,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 69 remaining) [2022-11-25 17:20:38,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 69 remaining) [2022-11-25 17:20:38,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 69 remaining) [2022-11-25 17:20:38,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 69 remaining) [2022-11-25 17:20:38,954 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 69 remaining) [2022-11-25 17:20:38,954 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 69 remaining) [2022-11-25 17:20:38,954 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr4ASSERT_VIOLATIONMEMORY_FREE (8 of 69 remaining) [2022-11-25 17:20:38,954 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr12ASSERT_VIOLATIONMEMORY_FREE (7 of 69 remaining) [2022-11-25 17:20:38,954 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr5ASSERT_VIOLATIONMEMORY_FREE (6 of 69 remaining) [2022-11-25 17:20:38,954 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr13ASSERT_VIOLATIONMEMORY_FREE (5 of 69 remaining) [2022-11-25 17:20:38,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr6ASSERT_VIOLATIONMEMORY_FREE (4 of 69 remaining) [2022-11-25 17:20:38,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr14ASSERT_VIOLATIONMEMORY_FREE (3 of 69 remaining) [2022-11-25 17:20:38,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr7ASSERT_VIOLATIONMEMORY_FREE (2 of 69 remaining) [2022-11-25 17:20:38,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr8ASSERT_VIOLATIONMEMORY_FREE (1 of 69 remaining) [2022-11-25 17:20:38,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location deleteErr9ASSERT_VIOLATIONMEMORY_FREE (0 of 69 remaining) [2022-11-25 17:20:38,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:39,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 17:20:39,170 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:39,176 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-25 17:20:39,176 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 17:20:39,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 05:20:39 BasicIcfg [2022-11-25 17:20:39,215 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 17:20:39,216 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 17:20:39,216 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 17:20:39,216 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 17:20:39,217 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:18:48" (3/4) ... [2022-11-25 17:20:39,219 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-25 17:20:39,219 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 17:20:39,220 INFO L158 Benchmark]: Toolchain (without parser) took 112925.30ms. Allocated memory was 81.8MB in the beginning and 98.6MB in the end (delta: 16.8MB). Free memory was 58.5MB in the beginning and 40.2MB in the end (delta: 18.3MB). Peak memory consumption was 37.1MB. Max. memory is 16.1GB. [2022-11-25 17:20:39,220 INFO L158 Benchmark]: CDTParser took 0.80ms. Allocated memory is still 56.6MB. Free memory is still 34.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:20:39,221 INFO L158 Benchmark]: CACSL2BoogieTranslator took 918.55ms. Allocated memory is still 81.8MB. Free memory was 58.3MB in the beginning and 45.8MB in the end (delta: 12.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-11-25 17:20:39,221 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.77ms. Allocated memory is still 81.8MB. Free memory was 45.8MB in the beginning and 43.3MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 17:20:39,221 INFO L158 Benchmark]: Boogie Preprocessor took 37.98ms. Allocated memory is still 81.8MB. Free memory was 43.3MB in the beginning and 41.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 17:20:39,222 INFO L158 Benchmark]: RCFGBuilder took 848.54ms. Allocated memory is still 81.8MB. Free memory was 41.0MB in the beginning and 41.5MB in the end (delta: -501.0kB). Peak memory consumption was 10.6MB. Max. memory is 16.1GB. [2022-11-25 17:20:39,222 INFO L158 Benchmark]: TraceAbstraction took 111043.27ms. Allocated memory was 81.8MB in the beginning and 98.6MB in the end (delta: 16.8MB). Free memory was 40.5MB in the beginning and 40.2MB in the end (delta: 336.9kB). Peak memory consumption was 16.6MB. Max. memory is 16.1GB. [2022-11-25 17:20:39,222 INFO L158 Benchmark]: Witness Printer took 3.85ms. Allocated memory is still 98.6MB. Free memory is still 40.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:20:39,224 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.80ms. Allocated memory is still 56.6MB. Free memory is still 34.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 918.55ms. Allocated memory is still 81.8MB. Free memory was 58.3MB in the beginning and 45.8MB in the end (delta: 12.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.77ms. Allocated memory is still 81.8MB. Free memory was 45.8MB in the beginning and 43.3MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.98ms. Allocated memory is still 81.8MB. Free memory was 43.3MB in the beginning and 41.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 848.54ms. Allocated memory is still 81.8MB. Free memory was 41.0MB in the beginning and 41.5MB in the end (delta: -501.0kB). Peak memory consumption was 10.6MB. Max. memory is 16.1GB. * TraceAbstraction took 111043.27ms. Allocated memory was 81.8MB in the beginning and 98.6MB in the end (delta: 16.8MB). Free memory was 40.5MB in the beginning and 40.2MB in the end (delta: 336.9kB). Peak memory consumption was 16.6MB. Max. memory is 16.1GB. * Witness Printer took 3.85ms. Allocated memory is still 98.6MB. Free memory is still 40.2MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 35.7s, 145 PlacesBefore, 62 PlacesAfterwards, 144 TransitionsBefore, 60 TransitionsAfterwards, 960 CoEnabledTransitionPairs, 6 FixpointIterations, 39 TrivialSequentialCompositions, 148 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 1 ChoiceCompositions, 193 TotalNumberOfCompositions, 1608 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1114, independent: 1009, independent conditional: 0, independent unconditional: 1009, dependent: 105, dependent conditional: 0, dependent unconditional: 105, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 566, independent: 529, independent conditional: 0, independent unconditional: 529, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 566, independent: 518, independent conditional: 0, independent unconditional: 518, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 48, independent: 11, independent conditional: 0, independent unconditional: 11, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 503, independent: 80, independent conditional: 0, independent unconditional: 80, dependent: 423, dependent conditional: 0, dependent unconditional: 423, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1114, independent: 480, independent conditional: 0, independent unconditional: 480, dependent: 68, dependent conditional: 0, dependent unconditional: 68, unknown: 566, unknown conditional: 0, unknown unconditional: 566] , Statistics on independence cache: Total cache size (in pairs): 43, Positive cache size: 29, Positive conditional cache size: 0, Positive unconditional cache size: 29, Negative cache size: 14, Negative conditional cache size: 0, Negative unconditional cache size: 14, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 1069]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1069. Possible FailurePath: [L1070] 0 pthread_t id1, id2; [L1071] 0 struct item *list = ((void *)0); [L1072] FCALL, FORK 0 pthread_create(&id1, ((void *)0), build, list) VAL [\old(argc)=5, argc=5, argv={10:9}, argv={10:9}, id1={15:0}, id2={7:0}, list={0:0}, pthread_create(&id1, ((void *)0), build, list)=0] [L1073] 0 \read(id1) VAL [\old(argc)=5, \read(id1)=0, argc=5, argv={10:9}, argv={10:9}, id1={15:0}, id2={7:0}, list={0:0}] [L1048] 1 struct item *list = (struct item *)plist; VAL [list={31:0}, plist={0:0}, plist={0:0}] [L1050] CALL 1 append(&list) [L1042] 1 struct item *elem = malloc(sizeof *elem); VAL [elem={1:0}, malloc(sizeof *elem)={1:0}, plist={31:0}, plist={31:0}] [L1043] EXPR 1 \read(**plist) [L1043] 1 elem->next = *plist [L1044] EXPR 1 elem->next [L1044] EXPR 1 (elem->next) ? elem->next->data : malloc(sizeof *elem) VAL [elem={1:0}, elem->next={0:0}, plist={31:0}, plist={31:0}] [L1044] EXPR 1 (elem->next) ? elem->next->data : malloc(sizeof *elem) VAL [(elem->next) ? elem->next->data : malloc(sizeof *elem)={3:0}, elem={1:0}, elem->next={0:0}, malloc(sizeof *elem)={3:0}, plist={31:0}, plist={31:0}] [L1044] 1 elem->data = (elem->next) ? elem->next->data : malloc(sizeof *elem) [L1045] 1 *plist = elem [L1050] RET 1 append(&list) [L1051] COND FALSE 1 !(__VERIFIER_nondet_int()) [L1073] FCALL, JOIN 1 pthread_join(id1, ((void *)0)) VAL [\old(argc)=5, \read(id1)=0, argc=5, argv={10:9}, argv={10:9}, id1={15:0}, id2={7:0}, list={0:0}] [L1074] FCALL, FORK 0 pthread_create(&id2, ((void *)0), delete, list) VAL [\old(argc)=5, argc=5, argv={10:9}, argv={10:9}, id1={15:0}, id2={7:0}, list={0:0}, plist={0:0}, pthread_create(&id2, ((void *)0), delete, list)=1] [L1075] 0 \read(id2) VAL [\old(argc)=5, \read(id2)=1, argc=5, argv={10:9}, argv={10:9}, id1={15:0}, id2={7:0}, list={0:0}, plist={0:0}] [L1055] 2 struct item *list = (struct item *)plist; [L1056] COND FALSE 2 !(\read(*list)) VAL [list={0:0}, plist={0:0}, plist={0:0}] [L1062] COND FALSE 2 !(\read(*list)) [L1075] FCALL, JOIN 2 pthread_join(id2, ((void *)0)) VAL [\old(argc)=5, \read(id2)=1, \result={0:0}, argc=5, argv={10:9}, argv={10:9}, id1={15:0}, id2={7:0}, list={0:0}, list={0:0}, plist={0:0}, plist={0:0}] [L1076] 0 return 0; [L1076] 0 return 0; [L1076] 0 return 0; - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1072]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1074]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1058]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1064]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1058]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1064]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1058]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1064]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1059]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1059]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1059]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 240 locations, 69 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 110.7s, OverallIterations: 20, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 55.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 35.9s, HoareTripleCheckerStatistics: 14 mSolverCounterUnknown, 4163 SdHoareTripleChecker+Valid, 53.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2986 mSDsluCounter, 1382 SdHoareTripleChecker+Invalid, 51.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1065 mSDsCounter, 310 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5807 IncrementalHoareTripleChecker+Invalid, 6131 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 310 mSolverCounterUnsat, 317 mSDtfsCounter, 5807 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 186 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=290occurred in iteration=13, InterpolantAutomatonStates: 82, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 11.4s InterpolantComputationTime, 182 NumberOfCodeBlocks, 182 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 164 ConstructedInterpolants, 10 QuantifiedInterpolants, 1284 SizeOfPredicates, 79 NumberOfNonLiveVariables, 2408 ConjunctsInSsa, 195 ConjunctsInUnsatCore, 21 InterpolantComputations, 17 PerfectInterpolantSequences, 4/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-25 17:20:39,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848bd3e3-a098-45e4-b3d1-31f5530e1b0d/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample