./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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_2a7956a4-2044-438f-8541-9e41b99c53b9/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 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f --- 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 18:25:58,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:25:58,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:25:58,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:25:58,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:25:58,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:25:58,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:25:58,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:25:58,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:25:58,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:25:58,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:25:58,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:25:58,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:25:58,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:25:58,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:25:58,282 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:25:58,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:25:58,283 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:25:58,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:25:58,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:25:58,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:25:58,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:25:58,298 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:25:58,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:25:58,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:25:58,313 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:25:58,313 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:25:58,315 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:25:58,316 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:25:58,317 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:25:58,318 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:25:58,319 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:25:58,321 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:25:58,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:25:58,323 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:25:58,323 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:25:58,324 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:25:58,324 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:25:58,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:25:58,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:25:58,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:25:58,327 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:25:58,366 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:25:58,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:25:58,371 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:25:58,371 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:25:58,372 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:25:58,372 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:25:58,373 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:25:58,373 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:25:58,373 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:25:58,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:25:58,375 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:25:58,375 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:25:58,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:25:58,375 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:25:58,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:25:58,376 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:25:58,376 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:25:58,376 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:25:58,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:25:58,377 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:25:58,377 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:25:58,377 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:25:58,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:25:58,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:25:58,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:25:58,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:25:58,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:25:58,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:25:58,379 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:25:58,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:25:58,380 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:25:58,380 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:25:58,380 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:25:58,381 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_2a7956a4-2044-438f-8541-9e41b99c53b9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f [2022-11-25 18:25:58,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:25:58,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:25:58,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:25:58,697 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:25:58,697 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:25:58,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2022-11-25 18:26:01,792 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:26:01,990 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:26:01,990 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2022-11-25 18:26:02,008 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/data/d66c2cdeb/f5a91967daf1465181ff815aebeb2960/FLAG382424b63 [2022-11-25 18:26:02,028 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/data/d66c2cdeb/f5a91967daf1465181ff815aebeb2960 [2022-11-25 18:26:02,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:26:02,037 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:26:02,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:26:02,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:26:02,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:26:02,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:26:02" (1/1) ... [2022-11-25 18:26:02,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5515b6ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:02, skipping insertion in model container [2022-11-25 18:26:02,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:26:02" (1/1) ... [2022-11-25 18:26:02,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:26:02,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:26:02,286 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:26:02,289 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:26:02,297 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2533,2546] [2022-11-25 18:26:02,308 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:26:02,319 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 18:26:02,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6e162577 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:02, skipping insertion in model container [2022-11-25 18:26:02,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:26:02,321 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 18:26:02,322 INFO L158 Benchmark]: Toolchain (without parser) took 284.68ms. Allocated memory was 138.4MB in the beginning and 192.9MB in the end (delta: 54.5MB). Free memory was 75.4MB in the beginning and 162.5MB in the end (delta: -87.1MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. [2022-11-25 18:26:02,323 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 138.4MB. Free memory is still 107.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:26:02,324 INFO L158 Benchmark]: CACSL2BoogieTranslator took 277.21ms. Allocated memory was 138.4MB in the beginning and 192.9MB in the end (delta: 54.5MB). Free memory was 75.1MB in the beginning and 162.5MB in the end (delta: -87.4MB). Peak memory consumption was 11.8MB. Max. memory is 16.1GB. [2022-11-25 18:26:02,325 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 138.4MB. Free memory is still 107.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 277.21ms. Allocated memory was 138.4MB in the beginning and 192.9MB in the end (delta: 54.5MB). Free memory was 75.1MB in the beginning and 162.5MB in the end (delta: -87.4MB). Peak memory consumption was 11.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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_2a7956a4-2044-438f-8541-9e41b99c53b9/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 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f --- 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 18:26:04,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:26:04,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:26:04,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:26:04,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:26:04,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:26:04,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:26:04,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:26:04,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:26:04,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:26:04,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:26:04,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:26:04,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:26:04,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:26:04,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:26:04,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:26:04,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:26:04,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:26:04,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:26:04,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:26:04,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:26:04,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:26:04,804 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:26:04,805 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:26:04,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:26:04,814 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:26:04,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:26:04,817 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:26:04,817 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:26:04,820 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:26:04,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:26:04,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:26:04,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:26:04,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:26:04,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:26:04,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:26:04,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:26:04,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:26:04,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:26:04,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:26:04,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:26:04,835 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 18:26:04,876 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:26:04,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:26:04,878 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:26:04,878 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:26:04,879 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:26:04,880 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:26:04,880 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:26:04,881 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:26:04,881 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:26:04,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:26:04,883 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:26:04,883 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:26:04,883 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:26:04,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:26:04,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:26:04,884 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:26:04,884 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:26:04,885 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:26:04,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:26:04,885 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:26:04,885 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 18:26:04,886 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 18:26:04,886 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:26:04,886 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:26:04,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:26:04,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:26:04,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:26:04,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:26:04,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:26:04,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:26:04,889 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 18:26:04,889 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 18:26:04,889 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:26:04,890 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:26:04,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:26:04,890 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 18:26:04,891 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_2a7956a4-2044-438f-8541-9e41b99c53b9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f [2022-11-25 18:26:05,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:26:05,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:26:05,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:26:05,293 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:26:05,293 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:26:05,295 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2022-11-25 18:26:08,376 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:26:08,595 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:26:08,595 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2022-11-25 18:26:08,603 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/data/1d9dc4a89/9ce48218ff4b4993940488a290640642/FLAG101f9fa84 [2022-11-25 18:26:08,632 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/data/1d9dc4a89/9ce48218ff4b4993940488a290640642 [2022-11-25 18:26:08,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:26:08,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:26:08,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:26:08,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:26:08,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:26:08,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:26:08" (1/1) ... [2022-11-25 18:26:08,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46119394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:08, skipping insertion in model container [2022-11-25 18:26:08,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:26:08" (1/1) ... [2022-11-25 18:26:08,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:26:08,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:26:08,923 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:26:08,938 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:26:08,949 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2533,2546] [2022-11-25 18:26:08,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:26:08,997 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 18:26:09,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:26:09,025 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:26:09,029 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:26:09,041 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2533,2546] [2022-11-25 18:26:09,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:26:09,054 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:26:09,080 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:26:09,088 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:26:09,098 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2533,2546] [2022-11-25 18:26:09,104 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:26:09,125 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:26:09,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:09 WrapperNode [2022-11-25 18:26:09,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:26:09,128 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:26:09,128 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:26:09,128 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:26:09,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:09" (1/1) ... [2022-11-25 18:26:09,161 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:09" (1/1) ... [2022-11-25 18:26:09,188 INFO L138 Inliner]: procedures = 27, calls = 46, calls flagged for inlining = 13, calls inlined = 19, statements flattened = 218 [2022-11-25 18:26:09,188 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:26:09,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:26:09,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:26:09,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:26:09,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:09" (1/1) ... [2022-11-25 18:26:09,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:09" (1/1) ... [2022-11-25 18:26:09,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:09" (1/1) ... [2022-11-25 18:26:09,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:09" (1/1) ... [2022-11-25 18:26:09,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:09" (1/1) ... [2022-11-25 18:26:09,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:09" (1/1) ... [2022-11-25 18:26:09,219 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:09" (1/1) ... [2022-11-25 18:26:09,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:09" (1/1) ... [2022-11-25 18:26:09,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:26:09,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:26:09,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:26:09,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:26:09,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:09" (1/1) ... [2022-11-25 18:26:09,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:26:09,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:26:09,268 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:26:09,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:26:09,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:26:09,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 18:26:09,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:26:09,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 18:26:09,322 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:26:09,322 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:26:09,323 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:26:09,323 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:26:09,323 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 18:26:09,323 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 18:26:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 18:26:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 18:26:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:26:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:26:09,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:26:09,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:26:09,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 18:26:09,327 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 18:26:09,535 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:26:09,537 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:26:10,343 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:26:10,580 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:26:10,581 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 18:26:10,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:26:10 BoogieIcfgContainer [2022-11-25 18:26:10,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:26:10,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:26:10,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:26:10,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:26:10,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:26:08" (1/3) ... [2022-11-25 18:26:10,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ceff662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:26:10, skipping insertion in model container [2022-11-25 18:26:10,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:09" (2/3) ... [2022-11-25 18:26:10,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ceff662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:26:10, skipping insertion in model container [2022-11-25 18:26:10,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:26:10" (3/3) ... [2022-11-25 18:26:10,597 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-mts.wvr.c [2022-11-25 18:26:10,616 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:26:10,617 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-11-25 18:26:10,617 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:26:10,789 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 18:26:10,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 254 transitions, 532 flow [2022-11-25 18:26:10,996 INFO L130 PetriNetUnfolder]: 18/251 cut-off events. [2022-11-25 18:26:10,997 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:26:11,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 251 events. 18/251 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 482 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 198. Up to 2 conditions per place. [2022-11-25 18:26:11,004 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 254 transitions, 532 flow [2022-11-25 18:26:11,016 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 238 places, 246 transitions, 510 flow [2022-11-25 18:26:11,021 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:26:11,045 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 238 places, 246 transitions, 510 flow [2022-11-25 18:26:11,049 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 238 places, 246 transitions, 510 flow [2022-11-25 18:26:11,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 246 transitions, 510 flow [2022-11-25 18:26:11,126 INFO L130 PetriNetUnfolder]: 18/246 cut-off events. [2022-11-25 18:26:11,127 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:26:11,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 246 events. 18/246 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 483 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 198. Up to 2 conditions per place. [2022-11-25 18:26:11,139 INFO L119 LiptonReduction]: Number of co-enabled transitions 12240 [2022-11-25 18:26:58,694 INFO L134 LiptonReduction]: Checked pairs total: 13542 [2022-11-25 18:26:58,695 INFO L136 LiptonReduction]: Total number of compositions: 276 [2022-11-25 18:26:58,721 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:26:58,727 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;@5134771a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:26:58,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2022-11-25 18:26:58,730 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 18:26:58,731 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:26:58,731 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:26:58,732 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:26:58,732 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:26:58,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:26:58,737 INFO L85 PathProgramCache]: Analyzing trace with hash 36994, now seen corresponding path program 1 times [2022-11-25 18:26:58,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:26:58,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778089859] [2022-11-25 18:26:58,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:26:58,769 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 18:26:58,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:26:58,829 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:26:58,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:26:59,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:26:59,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:26:59,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:26:59,343 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 18:26:59,344 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 18:26:59,390 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 18:26:59,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:26:59,391 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:26:59,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778089859] [2022-11-25 18:26:59,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778089859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:26:59,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:26:59,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:26:59,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89253233] [2022-11-25 18:26:59,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:26:59,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:26:59,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:26:59,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:26:59,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:26:59,733 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 530 [2022-11-25 18:26:59,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states 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 18:26:59,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:26:59,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 530 [2022-11-25 18:26:59,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:27:01,907 INFO L130 PetriNetUnfolder]: 7419/9490 cut-off events. [2022-11-25 18:27:01,908 INFO L131 PetriNetUnfolder]: For 118/118 co-relation queries the response was YES. [2022-11-25 18:27:01,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19157 conditions, 9490 events. 7419/9490 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 45214 event pairs, 3802 based on Foata normal form. 0/3001 useless extension candidates. Maximal degree in co-relation 8432. Up to 4711 conditions per place. [2022-11-25 18:27:01,973 INFO L137 encePairwiseOnDemand]: 518/530 looper letters, 82 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2022-11-25 18:27:01,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 87 transitions, 378 flow [2022-11-25 18:27:01,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:27:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:27:01,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 772 transitions. [2022-11-25 18:27:01,989 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48553459119496856 [2022-11-25 18:27:01,990 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 772 transitions. [2022-11-25 18:27:01,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 772 transitions. [2022-11-25 18:27:01,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:27:01,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 772 transitions. [2022-11-25 18:27:02,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.3333333333333) internal successors, (772), 3 states have internal predecessors, (772), 0 states have call successors, (0), 0 states 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 18:27:02,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states 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 18:27:02,016 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states 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 18:27:02,018 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 128 flow. Second operand 3 states and 772 transitions. [2022-11-25 18:27:02,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 87 transitions, 378 flow [2022-11-25 18:27:02,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 87 transitions, 354 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 18:27:02,034 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 110 flow [2022-11-25 18:27:02,036 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2022-11-25 18:27:02,039 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, -12 predicate places. [2022-11-25 18:27:02,039 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 110 flow [2022-11-25 18:27:02,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states 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 18:27:02,040 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:27:02,040 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:27:02,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:02,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:02,253 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:27:02,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:27:02,253 INFO L85 PathProgramCache]: Analyzing trace with hash 36993, now seen corresponding path program 1 times [2022-11-25 18:27:02,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:27:02,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207796855] [2022-11-25 18:27:02,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:27:02,254 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 18:27:02,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:27:02,255 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:02,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:27:02,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 18:27:02,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:27:02,432 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 18:27:02,432 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 18:27:02,461 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 18:27:02,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:27:02,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:27:02,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207796855] [2022-11-25 18:27:02,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207796855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:27:02,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:27:02,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:27:02,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614027530] [2022-11-25 18:27:02,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:27:02,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:27:02,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:27:02,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:27:02,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:27:02,638 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 530 [2022-11-25 18:27:02,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states 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 18:27:02,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:27:02,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 530 [2022-11-25 18:27:02,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:27:04,374 INFO L130 PetriNetUnfolder]: 7419/9488 cut-off events. [2022-11-25 18:27:04,375 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-11-25 18:27:04,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18999 conditions, 9488 events. 7419/9488 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 45371 event pairs, 3802 based on Foata normal form. 0/2897 useless extension candidates. Maximal degree in co-relation 9497. Up to 9416 conditions per place. [2022-11-25 18:27:04,439 INFO L137 encePairwiseOnDemand]: 528/530 looper letters, 42 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2022-11-25 18:27:04,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 194 flow [2022-11-25 18:27:04,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:27:04,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:27:04,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 712 transitions. [2022-11-25 18:27:04,443 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4477987421383648 [2022-11-25 18:27:04,443 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 712 transitions. [2022-11-25 18:27:04,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 712 transitions. [2022-11-25 18:27:04,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:27:04,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 712 transitions. [2022-11-25 18:27:04,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 0 states have call successors, (0), 0 states 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 18:27:04,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states 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 18:27:04,452 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states 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 18:27:04,453 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 110 flow. Second operand 3 states and 712 transitions. [2022-11-25 18:27:04,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 194 flow [2022-11-25 18:27:04,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:27:04,455 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 108 flow [2022-11-25 18:27:04,455 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2022-11-25 18:27:04,456 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, -12 predicate places. [2022-11-25 18:27:04,457 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 108 flow [2022-11-25 18:27:04,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states 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 18:27:04,457 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:27:04,458 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:27:04,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:04,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:04,669 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:27:04,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:27:04,674 INFO L85 PathProgramCache]: Analyzing trace with hash 37245, now seen corresponding path program 1 times [2022-11-25 18:27:04,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:27:04,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183021828] [2022-11-25 18:27:04,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:27:04,676 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 18:27:04,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:27:04,677 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:04,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:27:04,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 18:27:04,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:27:04,811 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 18:27:04,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:27:04,813 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:27:04,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183021828] [2022-11-25 18:27:04,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183021828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:27:04,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:27:04,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:27:04,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828911351] [2022-11-25 18:27:04,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:27:04,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:27:04,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:27:04,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:27:04,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:27:04,884 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 530 [2022-11-25 18:27:04,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states 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 18:27:04,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:27:04,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 530 [2022-11-25 18:27:04,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:27:05,746 INFO L130 PetriNetUnfolder]: 3710/4746 cut-off events. [2022-11-25 18:27:05,746 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-25 18:27:05,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9508 conditions, 4746 events. 3710/4746 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 20644 event pairs, 1901 based on Foata normal form. 1/1451 useless extension candidates. Maximal degree in co-relation 9500. Up to 4710 conditions per place. [2022-11-25 18:27:05,778 INFO L137 encePairwiseOnDemand]: 525/530 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2022-11-25 18:27:05,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 46 transitions, 194 flow [2022-11-25 18:27:05,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:27:05,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:27:05,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 721 transitions. [2022-11-25 18:27:05,783 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45345911949685536 [2022-11-25 18:27:05,783 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 721 transitions. [2022-11-25 18:27:05,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 721 transitions. [2022-11-25 18:27:05,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:27:05,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 721 transitions. [2022-11-25 18:27:05,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 0 states have call successors, (0), 0 states 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 18:27:05,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states 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 18:27:05,792 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states 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 18:27:05,792 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 108 flow. Second operand 3 states and 721 transitions. [2022-11-25 18:27:05,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 46 transitions, 194 flow [2022-11-25 18:27:05,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 191 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 18:27:05,794 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 117 flow [2022-11-25 18:27:05,795 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2022-11-25 18:27:05,795 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, -10 predicate places. [2022-11-25 18:27:05,796 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 117 flow [2022-11-25 18:27:05,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states 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 18:27:05,797 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:27:05,797 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:27:05,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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)] Ended with exit code 0 [2022-11-25 18:27:06,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:06,008 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:27:06,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:27:06,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1153555, now seen corresponding path program 1 times [2022-11-25 18:27:06,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:27:06,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473888884] [2022-11-25 18:27:06,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:27:06,009 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 18:27:06,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:27:06,015 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:06,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:27:06,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 18:27:06,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:27:06,234 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-11-25 18:27:06,235 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 6 case distinctions, treesize of input 38 treesize of output 51 [2022-11-25 18:27:06,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:27:06,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:27:06,372 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:27:06,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473888884] [2022-11-25 18:27:06,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473888884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:27:06,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:27:06,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:27:06,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538228531] [2022-11-25 18:27:06,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:27:06,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:27:06,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:27:06,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:27:06,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:27:06,609 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 530 [2022-11-25 18:27:06,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 18:27:06,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:27:06,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 530 [2022-11-25 18:27:06,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:27:07,363 INFO L130 PetriNetUnfolder]: 2912/3767 cut-off events. [2022-11-25 18:27:07,364 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-25 18:27:07,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7555 conditions, 3767 events. 2912/3767 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 16310 event pairs, 1487 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 7545. Up to 3731 conditions per place. [2022-11-25 18:27:07,388 INFO L137 encePairwiseOnDemand]: 527/530 looper letters, 40 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2022-11-25 18:27:07,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 44 transitions, 193 flow [2022-11-25 18:27:07,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:27:07,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:27:07,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 711 transitions. [2022-11-25 18:27:07,391 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44716981132075473 [2022-11-25 18:27:07,391 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 711 transitions. [2022-11-25 18:27:07,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 711 transitions. [2022-11-25 18:27:07,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:27:07,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 711 transitions. [2022-11-25 18:27:07,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states 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 18:27:07,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states 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 18:27:07,399 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states 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 18:27:07,399 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 117 flow. Second operand 3 states and 711 transitions. [2022-11-25 18:27:07,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 44 transitions, 193 flow [2022-11-25 18:27:07,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 44 transitions, 189 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:27:07,401 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 109 flow [2022-11-25 18:27:07,401 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2022-11-25 18:27:07,402 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, -12 predicate places. [2022-11-25 18:27:07,402 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 109 flow [2022-11-25 18:27:07,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 18:27:07,403 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:27:07,403 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:27:07,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:07,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:07,615 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:27:07,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:27:07,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1153556, now seen corresponding path program 1 times [2022-11-25 18:27:07,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:27:07,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826674943] [2022-11-25 18:27:07,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:27:07,616 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 18:27:07,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:27:07,617 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:07,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:27:07,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 18:27:07,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:27:07,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:27:07,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:27:07,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:27:07,854 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2022-11-25 18:27:07,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2022-11-25 18:27:07,883 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-25 18:27:07,884 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 23 treesize of output 19 [2022-11-25 18:27:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:27:08,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:27:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:27:08,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:27:08,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826674943] [2022-11-25 18:27:08,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826674943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:27:08,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:27:08,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 18:27:08,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859358095] [2022-11-25 18:27:08,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:27:08,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:27:08,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:27:08,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:27:08,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:27:09,829 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 530 [2022-11-25 18:27:09,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 109 flow. Second operand has 6 states, 6 states have (on average 215.0) internal successors, (1290), 6 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states 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 18:27:09,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:27:09,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 530 [2022-11-25 18:27:09,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:27:11,904 INFO L130 PetriNetUnfolder]: 5028/6559 cut-off events. [2022-11-25 18:27:11,904 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 18:27:11,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13154 conditions, 6559 events. 5028/6559 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 30937 event pairs, 2560 based on Foata normal form. 0/2312 useless extension candidates. Maximal degree in co-relation 13144. Up to 3730 conditions per place. [2022-11-25 18:27:11,944 INFO L137 encePairwiseOnDemand]: 524/530 looper letters, 75 selfloop transitions, 9 changer transitions 0/87 dead transitions. [2022-11-25 18:27:11,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 87 transitions, 387 flow [2022-11-25 18:27:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:27:11,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:27:11,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1586 transitions. [2022-11-25 18:27:11,951 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42749326145552563 [2022-11-25 18:27:11,951 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1586 transitions. [2022-11-25 18:27:11,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1586 transitions. [2022-11-25 18:27:11,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:27:11,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1586 transitions. [2022-11-25 18:27:11,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 226.57142857142858) internal successors, (1586), 7 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states 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 18:27:11,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 530.0) internal successors, (4240), 8 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states 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 18:27:11,965 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 530.0) internal successors, (4240), 8 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states 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 18:27:11,966 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 109 flow. Second operand 7 states and 1586 transitions. [2022-11-25 18:27:11,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 87 transitions, 387 flow [2022-11-25 18:27:11,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 87 transitions, 386 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:27:11,972 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 171 flow [2022-11-25 18:27:11,973 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=171, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2022-11-25 18:27:11,975 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, -4 predicate places. [2022-11-25 18:27:11,975 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 171 flow [2022-11-25 18:27:11,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 215.0) internal successors, (1290), 6 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states 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 18:27:11,977 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:27:11,977 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:27:11,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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)] Forceful destruction successful, exit code 0 [2022-11-25 18:27:12,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:12,194 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:27:12,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:27:12,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1153304, now seen corresponding path program 1 times [2022-11-25 18:27:12,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:27:12,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588995767] [2022-11-25 18:27:12,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:27:12,196 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 18:27:12,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:27:12,197 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:12,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:27:12,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 18:27:12,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:27:12,466 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 18:27:12,466 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 18:27:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:27:12,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:27:12,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:27:12,814 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:27:12,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588995767] [2022-11-25 18:27:12,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588995767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:27:12,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:27:12,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 18:27:12,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252908255] [2022-11-25 18:27:12,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:27:12,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:27:12,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:27:12,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:27:12,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:27:14,377 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 530 [2022-11-25 18:27:14,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 171 flow. Second operand has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states 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 18:27:14,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:27:14,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 530 [2022-11-25 18:27:14,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:27:16,327 INFO L130 PetriNetUnfolder]: 5027/6556 cut-off events. [2022-11-25 18:27:16,328 INFO L131 PetriNetUnfolder]: For 143/143 co-relation queries the response was YES. [2022-11-25 18:27:16,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13318 conditions, 6556 events. 5027/6556 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 30961 event pairs, 2560 based on Foata normal form. 3/2466 useless extension candidates. Maximal degree in co-relation 13304. Up to 3730 conditions per place. [2022-11-25 18:27:16,376 INFO L137 encePairwiseOnDemand]: 525/530 looper letters, 73 selfloop transitions, 8 changer transitions 0/84 dead transitions. [2022-11-25 18:27:16,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 84 transitions, 409 flow [2022-11-25 18:27:16,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:27:16,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:27:16,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1392 transitions. [2022-11-25 18:27:16,383 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4377358490566038 [2022-11-25 18:27:16,384 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1392 transitions. [2022-11-25 18:27:16,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1392 transitions. [2022-11-25 18:27:16,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:27:16,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1392 transitions. [2022-11-25 18:27:16,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 232.0) internal successors, (1392), 6 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states 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 18:27:16,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 530.0) internal successors, (3710), 7 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states 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 18:27:16,396 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 530.0) internal successors, (3710), 7 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states 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 18:27:16,396 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 171 flow. Second operand 6 states and 1392 transitions. [2022-11-25 18:27:16,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 84 transitions, 409 flow [2022-11-25 18:27:16,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 84 transitions, 389 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-11-25 18:27:16,400 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 161 flow [2022-11-25 18:27:16,400 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=161, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2022-11-25 18:27:16,401 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, -1 predicate places. [2022-11-25 18:27:16,401 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 161 flow [2022-11-25 18:27:16,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states 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 18:27:16,402 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:27:16,402 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:27:16,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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)] Forceful destruction successful, exit code 0 [2022-11-25 18:27:16,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:16,613 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:27:16,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:27:16,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1108592891, now seen corresponding path program 1 times [2022-11-25 18:27:16,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:27:16,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132264314] [2022-11-25 18:27:16,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:27:16,615 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 18:27:16,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:27:16,616 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:16,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:27:16,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:27:16,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:27:16,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:27:16,889 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-25 18:27:16,890 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 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-25 18:27:16,905 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 39 treesize of output 37 [2022-11-25 18:27:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:27:17,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:27:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:27:17,396 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:27:17,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132264314] [2022-11-25 18:27:17,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132264314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:27:17,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:27:17,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-25 18:27:17,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445164257] [2022-11-25 18:27:17,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:27:17,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:27:17,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:27:17,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:27:17,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:27:19,115 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 530 [2022-11-25 18:27:19,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 161 flow. Second operand has 8 states, 8 states have (on average 215.25) internal successors, (1722), 8 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states 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 18:27:19,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:27:19,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 530 [2022-11-25 18:27:19,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:27:20,416 INFO L130 PetriNetUnfolder]: 4825/6282 cut-off events. [2022-11-25 18:27:20,416 INFO L131 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2022-11-25 18:27:20,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12768 conditions, 6282 events. 4825/6282 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 29307 event pairs, 2454 based on Foata normal form. 0/2403 useless extension candidates. Maximal degree in co-relation 12754. Up to 3597 conditions per place. [2022-11-25 18:27:20,451 INFO L137 encePairwiseOnDemand]: 526/530 looper letters, 74 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2022-11-25 18:27:20,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 80 transitions, 389 flow [2022-11-25 18:27:20,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:27:20,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:27:20,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1147 transitions. [2022-11-25 18:27:20,456 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4328301886792453 [2022-11-25 18:27:20,456 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1147 transitions. [2022-11-25 18:27:20,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1147 transitions. [2022-11-25 18:27:20,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:27:20,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1147 transitions. [2022-11-25 18:27:20,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 229.4) internal successors, (1147), 5 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states 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 18:27:20,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 530.0) internal successors, (3180), 6 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states 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 18:27:20,465 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 530.0) internal successors, (3180), 6 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states 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 18:27:20,465 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 161 flow. Second operand 5 states and 1147 transitions. [2022-11-25 18:27:20,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 80 transitions, 389 flow [2022-11-25 18:27:20,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 80 transitions, 370 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-25 18:27:20,468 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 144 flow [2022-11-25 18:27:20,468 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2022-11-25 18:27:20,469 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, -4 predicate places. [2022-11-25 18:27:20,469 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 144 flow [2022-11-25 18:27:20,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 215.25) internal successors, (1722), 8 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states 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 18:27:20,470 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:27:20,470 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:27:20,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:20,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:20,681 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:27:20,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:27:20,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1108592892, now seen corresponding path program 1 times [2022-11-25 18:27:20,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:27:20,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953929471] [2022-11-25 18:27:20,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:27:20,682 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 18:27:20,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:27:20,683 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:20,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:27:20,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:27:20,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:27:20,880 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-25 18:27:20,881 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 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-25 18:27:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:27:21,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:27:21,015 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:27:21,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953929471] [2022-11-25 18:27:21,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953929471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:27:21,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:27:21,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:27:21,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766379559] [2022-11-25 18:27:21,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:27:21,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:27:21,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:27:21,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:27:21,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:27:21,249 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 530 [2022-11-25 18:27:21,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 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 18:27:21,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:27:21,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 530 [2022-11-25 18:27:21,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:27:22,166 INFO L130 PetriNetUnfolder]: 4623/6008 cut-off events. [2022-11-25 18:27:22,166 INFO L131 PetriNetUnfolder]: For 146/146 co-relation queries the response was YES. [2022-11-25 18:27:22,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12213 conditions, 6008 events. 4623/6008 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 28061 event pairs, 2348 based on Foata normal form. 0/2296 useless extension candidates. Maximal degree in co-relation 12199. Up to 5936 conditions per place. [2022-11-25 18:27:22,196 INFO L137 encePairwiseOnDemand]: 527/530 looper letters, 41 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2022-11-25 18:27:22,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 45 transitions, 224 flow [2022-11-25 18:27:22,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:27:22,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:27:22,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 707 transitions. [2022-11-25 18:27:22,199 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4446540880503145 [2022-11-25 18:27:22,199 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 707 transitions. [2022-11-25 18:27:22,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 707 transitions. [2022-11-25 18:27:22,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:27:22,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 707 transitions. [2022-11-25 18:27:22,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 0 states 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 18:27:22,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states 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 18:27:22,204 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states 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 18:27:22,205 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 144 flow. Second operand 3 states and 707 transitions. [2022-11-25 18:27:22,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 45 transitions, 224 flow [2022-11-25 18:27:22,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 45 transitions, 219 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 18:27:22,207 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 137 flow [2022-11-25 18:27:22,207 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2022-11-25 18:27:22,207 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, -7 predicate places. [2022-11-25 18:27:22,207 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 137 flow [2022-11-25 18:27:22,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 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 18:27:22,208 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:27:22,208 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:27:22,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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)] Ended with exit code 0 [2022-11-25 18:27:22,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:22,420 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:27:22,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:27:22,425 INFO L85 PathProgramCache]: Analyzing trace with hash 6632407, now seen corresponding path program 1 times [2022-11-25 18:27:22,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:27:22,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518700921] [2022-11-25 18:27:22,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:27:22,426 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 18:27:22,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:27:22,427 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:22,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:27:22,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 18:27:22,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:27:22,639 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 18:27:22,640 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 18:27:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:27:22,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:27:22,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:27:22,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518700921] [2022-11-25 18:27:22,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518700921] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:27:22,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:27:22,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:27:22,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7775298] [2022-11-25 18:27:22,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:27:22,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:27:22,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:27:22,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:27:22,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:27:22,940 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 530 [2022-11-25 18:27:22,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 213.25) internal successors, (853), 4 states have internal predecessors, (853), 0 states have call successors, (0), 0 states 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 18:27:22,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:27:22,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 530 [2022-11-25 18:27:22,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:27:23,494 INFO L130 PetriNetUnfolder]: 2533/3378 cut-off events. [2022-11-25 18:27:23,494 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2022-11-25 18:27:23,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6880 conditions, 3378 events. 2533/3378 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 15206 event pairs, 1295 based on Foata normal form. 0/1554 useless extension candidates. Maximal degree in co-relation 6866. Up to 3321 conditions per place. [2022-11-25 18:27:23,512 INFO L137 encePairwiseOnDemand]: 524/530 looper letters, 34 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2022-11-25 18:27:23,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 42 transitions, 209 flow [2022-11-25 18:27:23,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:27:23,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:27:23,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 884 transitions. [2022-11-25 18:27:23,516 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4169811320754717 [2022-11-25 18:27:23,516 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 884 transitions. [2022-11-25 18:27:23,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 884 transitions. [2022-11-25 18:27:23,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:27:23,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 884 transitions. [2022-11-25 18:27:23,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 18:27:23,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 530.0) internal successors, (2650), 5 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states 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 18:27:23,523 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 530.0) internal successors, (2650), 5 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states 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 18:27:23,523 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 137 flow. Second operand 4 states and 884 transitions. [2022-11-25 18:27:23,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 42 transitions, 209 flow [2022-11-25 18:27:23,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 42 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:27:23,525 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 140 flow [2022-11-25 18:27:23,525 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2022-11-25 18:27:23,526 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, -8 predicate places. [2022-11-25 18:27:23,526 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 140 flow [2022-11-25 18:27:23,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 213.25) internal successors, (853), 4 states have internal predecessors, (853), 0 states have call successors, (0), 0 states 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 18:27:23,527 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:27:23,527 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 18:27:23,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:23,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:23,738 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:27:23,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:27:23,738 INFO L85 PathProgramCache]: Analyzing trace with hash 4785918, now seen corresponding path program 2 times [2022-11-25 18:27:23,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:27:23,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293277163] [2022-11-25 18:27:23,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:27:23,739 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 18:27:23,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:27:23,741 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:23,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:23,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:27:23,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:27:23,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 18:27:23,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:27:23,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:27:23,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:27:23,983 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-25 18:27:23,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-25 18:27:24,023 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-25 18:27:24,023 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 44 treesize of output 45 [2022-11-25 18:27:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:27:24,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:27:24,189 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:27:24,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293277163] [2022-11-25 18:27:24,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293277163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:27:24,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:27:24,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:27:24,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876676812] [2022-11-25 18:27:24,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:27:24,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:27:24,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:27:24,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:27:24,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:27:26,449 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 [0] [2022-11-25 18:27:26,634 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 530 [2022-11-25 18:27:26,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states 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 18:27:26,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:27:26,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 530 [2022-11-25 18:27:26,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:27:27,229 INFO L130 PetriNetUnfolder]: 2533/3377 cut-off events. [2022-11-25 18:27:27,229 INFO L131 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2022-11-25 18:27:27,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6881 conditions, 3377 events. 2533/3377 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 15157 event pairs, 1295 based on Foata normal form. 0/1555 useless extension candidates. Maximal degree in co-relation 6866. Up to 3327 conditions per place. [2022-11-25 18:27:27,246 INFO L137 encePairwiseOnDemand]: 528/530 looper letters, 37 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2022-11-25 18:27:27,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 41 transitions, 209 flow [2022-11-25 18:27:27,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:27:27,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:27:27,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 699 transitions. [2022-11-25 18:27:27,249 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.439622641509434 [2022-11-25 18:27:27,250 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 699 transitions. [2022-11-25 18:27:27,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 699 transitions. [2022-11-25 18:27:27,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:27:27,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 699 transitions. [2022-11-25 18:27:27,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states 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 18:27:27,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states 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 18:27:27,255 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states 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 18:27:27,255 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 140 flow. Second operand 3 states and 699 transitions. [2022-11-25 18:27:27,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 41 transitions, 209 flow [2022-11-25 18:27:27,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 41 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:27:27,257 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 130 flow [2022-11-25 18:27:27,257 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2022-11-25 18:27:27,258 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, -10 predicate places. [2022-11-25 18:27:27,258 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 130 flow [2022-11-25 18:27:27,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states 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 18:27:27,259 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:27:27,259 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 18:27:27,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:27,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:27,470 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:27:27,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:27:27,470 INFO L85 PathProgramCache]: Analyzing trace with hash 4785666, now seen corresponding path program 2 times [2022-11-25 18:27:27,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:27:27,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460050325] [2022-11-25 18:27:27,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:27:27,471 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 18:27:27,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:27:27,472 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:27,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:27,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:27:27,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:27:27,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:27:27,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:27:27,749 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 18:27:27,749 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 18:27:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:27:28,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:27:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:27:28,869 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:27:28,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460050325] [2022-11-25 18:27:28,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460050325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:27:28,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:27:28,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 18:27:28,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459413092] [2022-11-25 18:27:28,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:27:28,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:27:28,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:27:28,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:27:28,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:27:34,533 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 530 [2022-11-25 18:27:34,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 130 flow. Second operand has 12 states, 12 states have (on average 220.0) internal successors, (2640), 12 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states 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 18:27:34,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:27:34,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 530 [2022-11-25 18:27:34,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:27:41,635 INFO L130 PetriNetUnfolder]: 12822/16955 cut-off events. [2022-11-25 18:27:41,635 INFO L131 PetriNetUnfolder]: For 534/534 co-relation queries the response was YES. [2022-11-25 18:27:41,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34663 conditions, 16955 events. 12822/16955 cut-off events. For 534/534 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 90627 event pairs, 6580 based on Foata normal form. 6/8109 useless extension candidates. Maximal degree in co-relation 34648. Up to 1916 conditions per place. [2022-11-25 18:27:41,717 INFO L137 encePairwiseOnDemand]: 526/530 looper letters, 262 selfloop transitions, 12 changer transitions 0/277 dead transitions. [2022-11-25 18:27:41,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 277 transitions, 1255 flow [2022-11-25 18:27:41,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 18:27:41,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 18:27:41,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2908 transitions. [2022-11-25 18:27:41,725 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45723270440251573 [2022-11-25 18:27:41,725 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2908 transitions. [2022-11-25 18:27:41,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2908 transitions. [2022-11-25 18:27:41,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:27:41,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2908 transitions. [2022-11-25 18:27:41,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 242.33333333333334) internal successors, (2908), 12 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states 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 18:27:41,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 530.0) internal successors, (6890), 13 states have internal predecessors, (6890), 0 states have call successors, (0), 0 states 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 18:27:41,744 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 530.0) internal successors, (6890), 13 states have internal predecessors, (6890), 0 states have call successors, (0), 0 states 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 18:27:41,744 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 130 flow. Second operand 12 states and 2908 transitions. [2022-11-25 18:27:41,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 277 transitions, 1255 flow [2022-11-25 18:27:41,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 277 transitions, 1254 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:27:41,751 INFO L231 Difference]: Finished difference. Result has 68 places, 48 transitions, 215 flow [2022-11-25 18:27:41,751 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=215, PETRI_PLACES=68, PETRI_TRANSITIONS=48} [2022-11-25 18:27:41,752 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 7 predicate places. [2022-11-25 18:27:41,752 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 48 transitions, 215 flow [2022-11-25 18:27:41,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 220.0) internal successors, (2640), 12 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states 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 18:27:41,754 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:27:41,754 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:27:41,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:41,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:41,966 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:27:41,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:27:41,966 INFO L85 PathProgramCache]: Analyzing trace with hash 6632408, now seen corresponding path program 1 times [2022-11-25 18:27:41,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:27:41,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255737673] [2022-11-25 18:27:41,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:27:41,967 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 18:27:41,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:27:41,968 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:41,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:27:42,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:27:42,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:27:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:27:42,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:27:42,420 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 25 treesize of output 21 [2022-11-25 18:27:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:27:42,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:27:42,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255737673] [2022-11-25 18:27:42,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255737673] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:27:42,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:27:42,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 18:27:42,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805513846] [2022-11-25 18:27:42,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:27:42,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:27:42,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:27:42,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:27:42,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:27:45,133 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 530 [2022-11-25 18:27:45,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 48 transitions, 215 flow. Second operand has 10 states, 10 states have (on average 214.2) internal successors, (2142), 10 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states 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 18:27:45,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:27:45,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 530 [2022-11-25 18:27:45,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:27:50,182 INFO L130 PetriNetUnfolder]: 19941/26750 cut-off events. [2022-11-25 18:27:50,182 INFO L131 PetriNetUnfolder]: For 1111/1111 co-relation queries the response was YES. [2022-11-25 18:27:50,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55029 conditions, 26750 events. 19941/26750 cut-off events. For 1111/1111 co-relation queries the response was YES. Maximal size of possible extension queue 1296. Compared 158067 event pairs, 5384 based on Foata normal form. 0/14008 useless extension candidates. Maximal degree in co-relation 55006. Up to 11729 conditions per place. [2022-11-25 18:27:50,319 INFO L137 encePairwiseOnDemand]: 523/530 looper letters, 139 selfloop transitions, 16 changer transitions 0/157 dead transitions. [2022-11-25 18:27:50,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 157 transitions, 774 flow [2022-11-25 18:27:50,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:27:50,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 18:27:50,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2489 transitions. [2022-11-25 18:27:50,323 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4269296740994854 [2022-11-25 18:27:50,323 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2489 transitions. [2022-11-25 18:27:50,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2489 transitions. [2022-11-25 18:27:50,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:27:50,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2489 transitions. [2022-11-25 18:27:50,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 226.27272727272728) internal successors, (2489), 11 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states 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 18:27:50,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 530.0) internal successors, (6360), 12 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states 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 18:27:50,337 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 530.0) internal successors, (6360), 12 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states 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 18:27:50,337 INFO L175 Difference]: Start difference. First operand has 68 places, 48 transitions, 215 flow. Second operand 11 states and 2489 transitions. [2022-11-25 18:27:50,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 157 transitions, 774 flow [2022-11-25 18:27:50,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 157 transitions, 763 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:27:50,353 INFO L231 Difference]: Finished difference. Result has 78 places, 55 transitions, 282 flow [2022-11-25 18:27:50,353 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=282, PETRI_PLACES=78, PETRI_TRANSITIONS=55} [2022-11-25 18:27:50,353 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 17 predicate places. [2022-11-25 18:27:50,354 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 55 transitions, 282 flow [2022-11-25 18:27:50,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 214.2) internal successors, (2142), 10 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states 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 18:27:50,354 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:27:50,355 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:27:50,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:50,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:50,559 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:27:50,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:27:50,559 INFO L85 PathProgramCache]: Analyzing trace with hash 205905529, now seen corresponding path program 1 times [2022-11-25 18:27:50,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:27:50,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304551684] [2022-11-25 18:27:50,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:27:50,560 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 18:27:50,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:27:50,560 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:50,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:27:50,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:27:50,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:27:50,764 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-25 18:27:50,764 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 3 case distinctions, treesize of input 15 treesize of output 29 [2022-11-25 18:27:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:27:50,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:27:50,812 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:27:50,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304551684] [2022-11-25 18:27:50,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304551684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:27:50,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:27:50,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:27:50,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812938027] [2022-11-25 18:27:50,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:27:50,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:27:50,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:27:50,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:27:50,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:27:50,957 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 530 [2022-11-25 18:27:50,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 55 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states 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 18:27:50,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:27:50,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 530 [2022-11-25 18:27:50,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:27:54,049 INFO L130 PetriNetUnfolder]: 16938/22651 cut-off events. [2022-11-25 18:27:54,049 INFO L131 PetriNetUnfolder]: For 8099/9319 co-relation queries the response was YES. [2022-11-25 18:27:54,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52544 conditions, 22651 events. 16938/22651 cut-off events. For 8099/9319 co-relation queries the response was YES. Maximal size of possible extension queue 1080. Compared 129715 event pairs, 9934 based on Foata normal form. 1220/14807 useless extension candidates. Maximal degree in co-relation 52516. Up to 22499 conditions per place. [2022-11-25 18:27:54,196 INFO L137 encePairwiseOnDemand]: 527/530 looper letters, 48 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2022-11-25 18:27:54,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 53 transitions, 376 flow [2022-11-25 18:27:54,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:27:54,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:27:54,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 692 transitions. [2022-11-25 18:27:54,199 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43522012578616354 [2022-11-25 18:27:54,199 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 692 transitions. [2022-11-25 18:27:54,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 692 transitions. [2022-11-25 18:27:54,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:27:54,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 692 transitions. [2022-11-25 18:27:54,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states 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 18:27:54,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states 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 18:27:54,203 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states 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 18:27:54,203 INFO L175 Difference]: Start difference. First operand has 78 places, 55 transitions, 282 flow. Second operand 3 states and 692 transitions. [2022-11-25 18:27:54,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 53 transitions, 376 flow [2022-11-25 18:27:54,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 53 transitions, 359 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-25 18:27:54,219 INFO L231 Difference]: Finished difference. Result has 74 places, 53 transitions, 263 flow [2022-11-25 18:27:54,220 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=74, PETRI_TRANSITIONS=53} [2022-11-25 18:27:54,220 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 13 predicate places. [2022-11-25 18:27:54,220 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 53 transitions, 263 flow [2022-11-25 18:27:54,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states 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 18:27:54,221 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:27:54,221 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:27:54,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:54,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:54,433 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:27:54,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:27:54,433 INFO L85 PathProgramCache]: Analyzing trace with hash 205905530, now seen corresponding path program 1 times [2022-11-25 18:27:54,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:27:54,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795047634] [2022-11-25 18:27:54,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:27:54,434 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 18:27:54,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:27:54,435 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:54,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:27:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:27:54,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:27:54,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:27:54,720 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 18:27:54,720 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 18:27:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:27:54,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:27:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:27:55,246 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:27:55,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795047634] [2022-11-25 18:27:55,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795047634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:27:55,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:27:55,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-25 18:27:55,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604255508] [2022-11-25 18:27:55,247 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:27:55,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:27:55,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:27:55,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:27:55,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:27:56,449 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 530 [2022-11-25 18:27:56,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 53 transitions, 263 flow. Second operand has 8 states, 8 states have (on average 215.75) internal successors, (1726), 8 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states 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 18:27:56,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:27:56,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 530 [2022-11-25 18:27:56,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:27:59,652 INFO L130 PetriNetUnfolder]: 15685/21011 cut-off events. [2022-11-25 18:27:59,653 INFO L131 PetriNetUnfolder]: For 8296/9426 co-relation queries the response was YES. [2022-11-25 18:27:59,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48595 conditions, 21011 events. 15685/21011 cut-off events. For 8296/9426 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 118505 event pairs, 9097 based on Foata normal form. 1130/14100 useless extension candidates. Maximal degree in co-relation 48568. Up to 19076 conditions per place. [2022-11-25 18:27:59,772 INFO L137 encePairwiseOnDemand]: 526/530 looper letters, 66 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2022-11-25 18:27:59,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 73 transitions, 455 flow [2022-11-25 18:27:59,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:27:59,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:27:59,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1128 transitions. [2022-11-25 18:27:59,775 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42566037735849055 [2022-11-25 18:27:59,775 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1128 transitions. [2022-11-25 18:27:59,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1128 transitions. [2022-11-25 18:27:59,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:27:59,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1128 transitions. [2022-11-25 18:27:59,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.6) internal successors, (1128), 5 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states 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 18:27:59,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 530.0) internal successors, (3180), 6 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states 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 18:27:59,781 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 530.0) internal successors, (3180), 6 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states 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 18:27:59,782 INFO L175 Difference]: Start difference. First operand has 74 places, 53 transitions, 263 flow. Second operand 5 states and 1128 transitions. [2022-11-25 18:27:59,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 73 transitions, 455 flow [2022-11-25 18:27:59,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 454 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:27:59,800 INFO L231 Difference]: Finished difference. Result has 75 places, 51 transitions, 264 flow [2022-11-25 18:27:59,800 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=75, PETRI_TRANSITIONS=51} [2022-11-25 18:27:59,801 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 14 predicate places. [2022-11-25 18:27:59,801 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 51 transitions, 264 flow [2022-11-25 18:27:59,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 215.75) internal successors, (1726), 8 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states 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 18:27:59,802 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:27:59,802 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:27:59,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:00,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:00,014 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:28:00,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:28:00,015 INFO L85 PathProgramCache]: Analyzing trace with hash 2088095966, now seen corresponding path program 1 times [2022-11-25 18:28:00,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:28:00,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [201568429] [2022-11-25 18:28:00,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:28:00,015 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 18:28:00,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:28:00,017 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:00,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:28:00,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:28:00,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:28:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:00,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:28:00,502 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 25 treesize of output 21 [2022-11-25 18:28:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:00,587 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:28:00,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [201568429] [2022-11-25 18:28:00,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [201568429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:28:00,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:28:00,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 18:28:00,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655820310] [2022-11-25 18:28:00,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:28:00,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:28:00,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:28:00,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:28:00,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:28:03,255 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 530 [2022-11-25 18:28:03,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 51 transitions, 264 flow. Second operand has 10 states, 10 states have (on average 214.6) internal successors, (2146), 10 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states 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 18:28:03,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:28:03,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 530 [2022-11-25 18:28:03,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:28:08,771 INFO L130 PetriNetUnfolder]: 23195/31695 cut-off events. [2022-11-25 18:28:08,771 INFO L131 PetriNetUnfolder]: For 15380/17296 co-relation queries the response was YES. [2022-11-25 18:28:08,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74498 conditions, 31695 events. 23195/31695 cut-off events. For 15380/17296 co-relation queries the response was YES. Maximal size of possible extension queue 1544. Compared 196764 event pairs, 6680 based on Foata normal form. 1916/23559 useless extension candidates. Maximal degree in co-relation 74470. Up to 14353 conditions per place. [2022-11-25 18:28:09,245 INFO L137 encePairwiseOnDemand]: 523/530 looper letters, 127 selfloop transitions, 16 changer transitions 0/146 dead transitions. [2022-11-25 18:28:09,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 146 transitions, 842 flow [2022-11-25 18:28:09,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:28:09,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 18:28:09,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2465 transitions. [2022-11-25 18:28:09,249 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4228130360205832 [2022-11-25 18:28:09,250 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2465 transitions. [2022-11-25 18:28:09,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2465 transitions. [2022-11-25 18:28:09,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:28:09,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2465 transitions. [2022-11-25 18:28:09,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 224.0909090909091) internal successors, (2465), 11 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states 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 18:28:09,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 530.0) internal successors, (6360), 12 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states 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 18:28:09,260 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 530.0) internal successors, (6360), 12 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states 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 18:28:09,260 INFO L175 Difference]: Start difference. First operand has 75 places, 51 transitions, 264 flow. Second operand 11 states and 2465 transitions. [2022-11-25 18:28:09,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 146 transitions, 842 flow [2022-11-25 18:28:09,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 146 transitions, 837 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 18:28:09,274 INFO L231 Difference]: Finished difference. Result has 86 places, 57 transitions, 328 flow [2022-11-25 18:28:09,274 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=328, PETRI_PLACES=86, PETRI_TRANSITIONS=57} [2022-11-25 18:28:09,275 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 25 predicate places. [2022-11-25 18:28:09,275 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 57 transitions, 328 flow [2022-11-25 18:28:09,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 214.6) internal successors, (2146), 10 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states 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 18:28:09,275 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:28:09,276 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:28:09,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:09,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:09,488 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:28:09,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:28:09,488 INFO L85 PathProgramCache]: Analyzing trace with hash 2078987427, now seen corresponding path program 1 times [2022-11-25 18:28:09,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:28:09,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636147499] [2022-11-25 18:28:09,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:28:09,488 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 18:28:09,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:28:09,489 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:09,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:28:09,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:28:09,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:28:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:09,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:28:09,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:28:09,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-25 18:28:09,833 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 70 treesize of output 68 [2022-11-25 18:28:09,839 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 68 treesize of output 66 [2022-11-25 18:28:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:10,026 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:28:10,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636147499] [2022-11-25 18:28:10,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636147499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:28:10,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:28:10,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 18:28:10,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361905244] [2022-11-25 18:28:10,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:28:10,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:28:10,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:28:10,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:28:10,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:28:10,966 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 530 [2022-11-25 18:28:10,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 57 transitions, 328 flow. Second operand has 12 states, 12 states have (on average 219.33333333333334) internal successors, (2632), 12 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states 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 18:28:10,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:28:10,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 530 [2022-11-25 18:28:10,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:28:17,058 INFO L130 PetriNetUnfolder]: 21998/30088 cut-off events. [2022-11-25 18:28:17,058 INFO L131 PetriNetUnfolder]: For 24427/26423 co-relation queries the response was YES. [2022-11-25 18:28:17,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81057 conditions, 30088 events. 21998/30088 cut-off events. For 24427/26423 co-relation queries the response was YES. Maximal size of possible extension queue 1556. Compared 189125 event pairs, 9519 based on Foata normal form. 2212/25565 useless extension candidates. Maximal degree in co-relation 81025. Up to 18340 conditions per place. [2022-11-25 18:28:17,411 INFO L137 encePairwiseOnDemand]: 521/530 looper letters, 107 selfloop transitions, 8 changer transitions 0/118 dead transitions. [2022-11-25 18:28:17,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 118 transitions, 754 flow [2022-11-25 18:28:17,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:28:17,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:28:17,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2057 transitions. [2022-11-25 18:28:17,416 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4312368972746331 [2022-11-25 18:28:17,416 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2057 transitions. [2022-11-25 18:28:17,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2057 transitions. [2022-11-25 18:28:17,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:28:17,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2057 transitions. [2022-11-25 18:28:17,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 228.55555555555554) internal successors, (2057), 9 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states 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 18:28:17,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 530.0) internal successors, (5300), 10 states have internal predecessors, (5300), 0 states have call successors, (0), 0 states 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 18:28:17,423 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 530.0) internal successors, (5300), 10 states have internal predecessors, (5300), 0 states have call successors, (0), 0 states 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 18:28:17,423 INFO L175 Difference]: Start difference. First operand has 86 places, 57 transitions, 328 flow. Second operand 9 states and 2057 transitions. [2022-11-25 18:28:17,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 118 transitions, 754 flow [2022-11-25 18:28:17,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 118 transitions, 743 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:28:17,468 INFO L231 Difference]: Finished difference. Result has 92 places, 56 transitions, 338 flow [2022-11-25 18:28:17,468 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=338, PETRI_PLACES=92, PETRI_TRANSITIONS=56} [2022-11-25 18:28:17,469 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 31 predicate places. [2022-11-25 18:28:17,469 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 56 transitions, 338 flow [2022-11-25 18:28:17,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 219.33333333333334) internal successors, (2632), 12 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states 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 18:28:17,470 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:28:17,470 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:28:17,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:17,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:17,682 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:28:17,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:28:17,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1677945671, now seen corresponding path program 2 times [2022-11-25 18:28:17,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:28:17,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231531380] [2022-11-25 18:28:17,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:28:17,683 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 18:28:17,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:28:17,684 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:17,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:17,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:28:17,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:28:17,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:28:17,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:28:17,988 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 18:28:17,988 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 18:28:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:18,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:28:18,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:28:18,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-25 18:28:18,291 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 70 treesize of output 68 [2022-11-25 18:28:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:18,917 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:28:18,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231531380] [2022-11-25 18:28:18,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231531380] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:28:18,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:28:18,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-25 18:28:18,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341968473] [2022-11-25 18:28:18,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:28:18,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:28:18,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:28:18,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:28:18,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:28:23,688 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 530 [2022-11-25 18:28:23,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 56 transitions, 338 flow. Second operand has 14 states, 14 states have (on average 213.28571428571428) internal successors, (2986), 14 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states 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 18:28:23,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:28:23,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 530 [2022-11-25 18:28:23,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:28:32,798 INFO L130 PetriNetUnfolder]: 30640/41739 cut-off events. [2022-11-25 18:28:32,799 INFO L131 PetriNetUnfolder]: For 34688/37524 co-relation queries the response was YES. [2022-11-25 18:28:33,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117273 conditions, 41739 events. 30640/41739 cut-off events. For 34688/37524 co-relation queries the response was YES. Maximal size of possible extension queue 2032. Compared 266657 event pairs, 7396 based on Foata normal form. 3636/35985 useless extension candidates. Maximal degree in co-relation 117238. Up to 14217 conditions per place. [2022-11-25 18:28:33,160 INFO L137 encePairwiseOnDemand]: 523/530 looper letters, 133 selfloop transitions, 14 changer transitions 0/150 dead transitions. [2022-11-25 18:28:33,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 150 transitions, 942 flow [2022-11-25 18:28:33,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:28:33,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:28:33,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2245 transitions. [2022-11-25 18:28:33,166 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4235849056603774 [2022-11-25 18:28:33,166 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2245 transitions. [2022-11-25 18:28:33,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2245 transitions. [2022-11-25 18:28:33,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:28:33,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2245 transitions. [2022-11-25 18:28:33,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 224.5) internal successors, (2245), 10 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states 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 18:28:33,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 530.0) internal successors, (5830), 11 states have internal predecessors, (5830), 0 states have call successors, (0), 0 states 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 18:28:33,177 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 530.0) internal successors, (5830), 11 states have internal predecessors, (5830), 0 states have call successors, (0), 0 states 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 18:28:33,177 INFO L175 Difference]: Start difference. First operand has 92 places, 56 transitions, 338 flow. Second operand 10 states and 2245 transitions. [2022-11-25 18:28:33,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 150 transitions, 942 flow [2022-11-25 18:28:33,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 150 transitions, 932 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:28:33,274 INFO L231 Difference]: Finished difference. Result has 100 places, 59 transitions, 392 flow [2022-11-25 18:28:33,274 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=392, PETRI_PLACES=100, PETRI_TRANSITIONS=59} [2022-11-25 18:28:33,275 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 39 predicate places. [2022-11-25 18:28:33,275 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 59 transitions, 392 flow [2022-11-25 18:28:33,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 213.28571428571428) internal successors, (2986), 14 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states 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 18:28:33,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:28:33,276 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:28:33,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:33,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:33,488 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:28:33,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:28:33,489 INFO L85 PathProgramCache]: Analyzing trace with hash -194061845, now seen corresponding path program 1 times [2022-11-25 18:28:33,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:28:33,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462406924] [2022-11-25 18:28:33,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:28:33,489 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 18:28:33,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:28:33,490 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:33,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:28:33,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 18:28:33,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:28:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:28:33,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:28:33,682 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:28:33,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462406924] [2022-11-25 18:28:33,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462406924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:28:33,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:28:33,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:28:33,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617053970] [2022-11-25 18:28:33,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:28:33,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:28:33,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:28:33,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:28:33,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:28:33,876 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 530 [2022-11-25 18:28:33,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 59 transitions, 392 flow. Second operand has 4 states, 4 states have (on average 224.25) internal successors, (897), 4 states have internal predecessors, (897), 0 states have call successors, (0), 0 states 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 18:28:33,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:28:33,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 530 [2022-11-25 18:28:33,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:28:39,037 INFO L130 PetriNetUnfolder]: 20014/28018 cut-off events. [2022-11-25 18:28:39,038 INFO L131 PetriNetUnfolder]: For 37233/40863 co-relation queries the response was YES. [2022-11-25 18:28:39,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82460 conditions, 28018 events. 20014/28018 cut-off events. For 37233/40863 co-relation queries the response was YES. Maximal size of possible extension queue 1397. Compared 182623 event pairs, 13782 based on Foata normal form. 5750/27302 useless extension candidates. Maximal degree in co-relation 82421. Up to 27851 conditions per place. [2022-11-25 18:28:39,265 INFO L137 encePairwiseOnDemand]: 528/530 looper letters, 52 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2022-11-25 18:28:39,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 58 transitions, 494 flow [2022-11-25 18:28:39,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:28:39,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:28:39,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 694 transitions. [2022-11-25 18:28:39,268 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43647798742138366 [2022-11-25 18:28:39,268 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 694 transitions. [2022-11-25 18:28:39,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 694 transitions. [2022-11-25 18:28:39,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:28:39,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 694 transitions. [2022-11-25 18:28:39,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 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 18:28:39,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states 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 18:28:39,271 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states 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 18:28:39,271 INFO L175 Difference]: Start difference. First operand has 100 places, 59 transitions, 392 flow. Second operand 3 states and 694 transitions. [2022-11-25 18:28:39,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 58 transitions, 494 flow [2022-11-25 18:28:39,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 58 transitions, 476 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-11-25 18:28:39,314 INFO L231 Difference]: Finished difference. Result has 95 places, 58 transitions, 372 flow [2022-11-25 18:28:39,314 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=372, PETRI_PLACES=95, PETRI_TRANSITIONS=58} [2022-11-25 18:28:39,314 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 34 predicate places. [2022-11-25 18:28:39,314 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 58 transitions, 372 flow [2022-11-25 18:28:39,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.25) internal successors, (897), 4 states have internal predecessors, (897), 0 states have call successors, (0), 0 states 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 18:28:39,314 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:28:39,315 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:28:39,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:39,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:39,515 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:28:39,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:28:39,516 INFO L85 PathProgramCache]: Analyzing trace with hash 919223834, now seen corresponding path program 1 times [2022-11-25 18:28:39,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:28:39,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994917718] [2022-11-25 18:28:39,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:28:39,516 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 18:28:39,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:28:39,517 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:39,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:28:39,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 18:28:39,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:28:39,795 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 18:28:39,795 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 18:28:40,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:40,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:28:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:40,826 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:28:40,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994917718] [2022-11-25 18:28:40,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994917718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:28:40,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:28:40,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 18:28:40,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281445683] [2022-11-25 18:28:40,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:28:40,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:28:40,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:28:40,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:28:40,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:28:47,151 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 530 [2022-11-25 18:28:47,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 58 transitions, 372 flow. Second operand has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states 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 18:28:47,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:28:47,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 530 [2022-11-25 18:28:47,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:28:56,581 INFO L130 PetriNetUnfolder]: 19361/28239 cut-off events. [2022-11-25 18:28:56,581 INFO L131 PetriNetUnfolder]: For 44722/48998 co-relation queries the response was YES. [2022-11-25 18:28:56,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85556 conditions, 28239 events. 19361/28239 cut-off events. For 44722/48998 co-relation queries the response was YES. Maximal size of possible extension queue 1215. Compared 187621 event pairs, 14175 based on Foata normal form. 4276/28853 useless extension candidates. Maximal degree in co-relation 85518. Up to 18205 conditions per place. [2022-11-25 18:28:56,804 INFO L137 encePairwiseOnDemand]: 522/530 looper letters, 126 selfloop transitions, 15 changer transitions 0/145 dead transitions. [2022-11-25 18:28:56,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 145 transitions, 1014 flow [2022-11-25 18:28:56,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:28:56,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 18:28:56,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2414 transitions. [2022-11-25 18:28:56,808 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41406518010291593 [2022-11-25 18:28:56,808 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2414 transitions. [2022-11-25 18:28:56,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2414 transitions. [2022-11-25 18:28:56,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:28:56,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2414 transitions. [2022-11-25 18:28:56,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 219.45454545454547) internal successors, (2414), 11 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states 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 18:28:56,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 530.0) internal successors, (6360), 12 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states 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 18:28:56,814 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 530.0) internal successors, (6360), 12 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states 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 18:28:56,814 INFO L175 Difference]: Start difference. First operand has 95 places, 58 transitions, 372 flow. Second operand 11 states and 2414 transitions. [2022-11-25 18:28:56,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 145 transitions, 1014 flow [2022-11-25 18:28:56,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 145 transitions, 1013 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:28:56,858 INFO L231 Difference]: Finished difference. Result has 106 places, 62 transitions, 425 flow [2022-11-25 18:28:56,858 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=425, PETRI_PLACES=106, PETRI_TRANSITIONS=62} [2022-11-25 18:28:56,859 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 45 predicate places. [2022-11-25 18:28:56,859 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 62 transitions, 425 flow [2022-11-25 18:28:56,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states 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 18:28:56,859 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:28:56,860 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:28:56,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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)] Forceful destruction successful, exit code 0 [2022-11-25 18:28:57,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:57,075 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:28:57,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:28:57,075 INFO L85 PathProgramCache]: Analyzing trace with hash 910689488, now seen corresponding path program 1 times [2022-11-25 18:28:57,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:28:57,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100992615] [2022-11-25 18:28:57,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:28:57,076 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 18:28:57,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:28:57,077 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:57,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:28:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:28:57,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:28:57,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:28:57,337 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 18:28:57,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:28:57,492 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 18:28:57,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:28:57,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100992615] [2022-11-25 18:28:57,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100992615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:28:57,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:28:57,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2022-11-25 18:28:57,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054630801] [2022-11-25 18:28:57,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:28:57,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:28:57,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:28:57,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:28:57,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:28:58,547 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 530 [2022-11-25 18:28:58,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 62 transitions, 425 flow. Second operand has 11 states, 11 states have (on average 217.63636363636363) internal successors, (2394), 11 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states 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 18:28:58,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:28:58,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 530 [2022-11-25 18:28:58,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:04,692 INFO L130 PetriNetUnfolder]: 22519/31779 cut-off events. [2022-11-25 18:29:04,692 INFO L131 PetriNetUnfolder]: For 53789/56259 co-relation queries the response was YES. [2022-11-25 18:29:04,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111172 conditions, 31779 events. 22519/31779 cut-off events. For 53789/56259 co-relation queries the response was YES. Maximal size of possible extension queue 1583. Compared 209622 event pairs, 11795 based on Foata normal form. 2518/30933 useless extension candidates. Maximal degree in co-relation 111131. Up to 22620 conditions per place. [2022-11-25 18:29:04,973 INFO L137 encePairwiseOnDemand]: 523/530 looper letters, 92 selfloop transitions, 7 changer transitions 0/104 dead transitions. [2022-11-25 18:29:04,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 104 transitions, 805 flow [2022-11-25 18:29:04,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:29:04,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:29:04,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1803 transitions. [2022-11-25 18:29:04,976 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4252358490566038 [2022-11-25 18:29:04,976 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1803 transitions. [2022-11-25 18:29:04,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1803 transitions. [2022-11-25 18:29:04,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:04,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1803 transitions. [2022-11-25 18:29:04,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 225.375) internal successors, (1803), 8 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states 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 18:29:04,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 530.0) internal successors, (4770), 9 states have internal predecessors, (4770), 0 states have call successors, (0), 0 states 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 18:29:04,981 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 530.0) internal successors, (4770), 9 states have internal predecessors, (4770), 0 states have call successors, (0), 0 states 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 18:29:04,981 INFO L175 Difference]: Start difference. First operand has 106 places, 62 transitions, 425 flow. Second operand 8 states and 1803 transitions. [2022-11-25 18:29:04,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 104 transitions, 805 flow [2022-11-25 18:29:05,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 104 transitions, 766 flow, removed 6 selfloop flow, removed 8 redundant places. [2022-11-25 18:29:05,261 INFO L231 Difference]: Finished difference. Result has 106 places, 60 transitions, 397 flow [2022-11-25 18:29:05,261 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=397, PETRI_PLACES=106, PETRI_TRANSITIONS=60} [2022-11-25 18:29:05,262 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 45 predicate places. [2022-11-25 18:29:05,262 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 60 transitions, 397 flow [2022-11-25 18:29:05,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 217.63636363636363) internal successors, (2394), 11 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states 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 18:29:05,262 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:05,262 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:05,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:29:05,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:29:05,463 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 18:29:05,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:05,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1568826917, now seen corresponding path program 1 times [2022-11-25 18:29:05,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:29:05,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929476468] [2022-11-25 18:29:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:05,464 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 18:29:05,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:29:05,465 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 18:29:05,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7956a4-2044-438f-8541-9e41b99c53b9/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 (22)] Waiting until timeout for monitored process [2022-11-25 18:29:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:05,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:29:05,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:05,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:06,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:29:06,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929476468] [2022-11-25 18:29:06,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929476468] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:29:06,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:29:06,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 18:29:06,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587752511] [2022-11-25 18:29:06,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:29:06,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:29:06,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:29:06,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:29:06,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:29:07,544 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 530 [2022-11-25 18:29:07,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 60 transitions, 397 flow. Second operand has 12 states, 12 states have (on average 217.83333333333334) internal successors, (2614), 12 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states 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 18:29:07,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:07,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 530 [2022-11-25 18:29:07,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand